misc/ss.c

   1 /*
   2  * ss.c         "sockstat", socket statistics
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <syslog.h>
  16 #include <fcntl.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/socket.h>
  19 #include <sys/uio.h>
  20 #include <netinet/in.h>
  21 #include <string.h>
  22 #include <errno.h>
  23 #include <netdb.h>
  24 #include <arpa/inet.h>
  25 #include <resolv.h>
  26 #include <dirent.h>
  27 #include <fnmatch.h>
  28 #include <getopt.h>
  29
  30 #include "utils.h"
  31 #include "rt_names.h"
  32 #include "ll_map.h"
  33 #include "libnetlink.h"
  34 #include "SNAPSHOT.h"
  35
  36 #include <netinet/tcp.h>
  37 #include <linux/sock_diag.h>
  38 #include <linux/inet_diag.h>
  39 #include <linux/unix_diag.h>
  40
  41 int resolve_hosts = 0;
  42 int resolve_services = 1;
  43 int preferred_family = AF_UNSPEC;
  44 int show_options = 0;
  45 int show_details = 0;
  46 int show_users = 0;
  47 int show_mem = 0;
  48 int show_tcpinfo = 0;
  49
  50 int netid_width;
  51 int state_width;
  52 int addrp_width;
  53 int addr_width;
  54 int serv_width;
  55 int screen_width;
  56
  57 static const char *TCP_PROTO = "tcp";
  58 static const char *UDP_PROTO = "udp";
  59 static const char *RAW_PROTO = "raw";
  60 static const char *dg_proto = NULL;
  61
  62 enum
  63 {
  64         TCP_DB,
  65         DCCP_DB,
  66         UDP_DB,
  67         RAW_DB,
  68         UNIX_DG_DB,
  69         UNIX_ST_DB,
  70         PACKET_DG_DB,
  71         PACKET_R_DB,
  72         NETLINK_DB,
  73         MAX_DB
  74 };
  75
  76 #define PACKET_DBM ((1<<PACKET_DG_DB)|(1<<PACKET_R_DB))
  77 #define UNIX_DBM ((1<<UNIX_DG_DB)|(1<<UNIX_ST_DB))
  78 #define ALL_DB ((1<<MAX_DB)-1)
  79
  80 enum {
  81         SS_UNKNOWN,
  82         SS_ESTABLISHED,
  83         SS_SYN_SENT,
  84         SS_SYN_RECV,
  85         SS_FIN_WAIT1,
  86         SS_FIN_WAIT2,
  87         SS_TIME_WAIT,
  88         SS_CLOSE,
  89         SS_CLOSE_WAIT,
  90         SS_LAST_ACK,
  91         SS_LISTEN,
  92         SS_CLOSING,
  93         SS_MAX
  94 };
  95
  96 #define SS_ALL ((1<<SS_MAX)-1)
  97
  98 #include "ssfilter.h"
  99
 100 struct filter
 101 {
 102         int dbs;
 103         int states;
 104         int families;
 105         struct ssfilter *f;
 106 };
 107
 108 struct filter default_filter = {
 109         .dbs    =  (1<<TCP_DB),
 110         .states = SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)),
 111         .families= (1<<AF_INET)|(1<<AF_INET6),
 112 };
 113
 114 struct filter current_filter;
 115
 116 static FILE *generic_proc_open(const char *env, const char *name)
 117 {
 118         const char *p = getenv(env);
 119         char store[128];
 120
 121         if (!p) {
 122                 p = getenv("PROC_ROOT") ? : "/proc";
 123                 snprintf(store, sizeof(store)-1, "%s/%s", p, name);
 124                 p = store;
 125         }
 126
 127         return fopen(p, "r");
 128 }
 129
 130 static FILE *net_tcp_open(void)
 131 {
 132         return generic_proc_open("PROC_NET_TCP", "net/tcp");
 133 }
 134
 135 static FILE *net_tcp6_open(void)
 136 {
 137         return generic_proc_open("PROC_NET_TCP6", "net/tcp6");
 138 }
 139
 140 static FILE *net_udp_open(void)
 141 {
 142         return generic_proc_open("PROC_NET_UDP", "net/udp");
 143 }
 144
 145 static FILE *net_udp6_open(void)
 146 {
 147         return generic_proc_open("PROC_NET_UDP6", "net/udp6");
 148 }
 149
 150 static FILE *net_raw_open(void)
 151 {
 152         return generic_proc_open("PROC_NET_RAW", "net/raw");
 153 }
 154
 155 static FILE *net_raw6_open(void)
 156 {
 157         return generic_proc_open("PROC_NET_RAW6", "net/raw6");
 158 }
 159
 160 static FILE *net_unix_open(void)
 161 {
 162         return generic_proc_open("PROC_NET_UNIX", "net/unix");
 163 }
 164
 165 static FILE *net_packet_open(void)
 166 {
 167         return generic_proc_open("PROC_NET_PACKET", "net/packet");
 168 }
 169
 170 static FILE *net_netlink_open(void)
 171 {
 172         return generic_proc_open("PROC_NET_NETLINK", "net/netlink");
 173 }
 174
 175 static FILE *slabinfo_open(void)
 176 {
 177         return generic_proc_open("PROC_SLABINFO", "slabinfo");
 178 }
 179
 180 static FILE *net_sockstat_open(void)
 181 {
 182         return generic_proc_open("PROC_NET_SOCKSTAT", "net/sockstat");
 183 }
 184
 185 static FILE *net_sockstat6_open(void)
 186 {
 187         return generic_proc_open("PROC_NET_SOCKSTAT6", "net/sockstat6");
 188 }
 189
 190 static FILE *net_snmp_open(void)
 191 {
 192         return generic_proc_open("PROC_NET_SNMP", "net/snmp");
 193 }
 194
 195 static FILE *ephemeral_ports_open(void)
 196 {
 197         return generic_proc_open("PROC_IP_LOCAL_PORT_RANGE", "sys/net/ipv4/ip_local_port_range");
 198 }
 199
 200 struct user_ent {
 201         struct user_ent *next;
 202         unsigned int    ino;
 203         int             pid;
 204         int             fd;
 205         char            process[0];
 206 };
 207
 208 #define USER_ENT_HASH_SIZE      256
 209 struct user_ent *user_ent_hash[USER_ENT_HASH_SIZE];
 210
 211 static int user_ent_hashfn(unsigned int ino)
 212 {
 213         int val = (ino >> 24) ^ (ino >> 16) ^ (ino >> 8) ^ ino;
 214
 215         return val & (USER_ENT_HASH_SIZE - 1);
 216 }
 217
 218 static void user_ent_add(unsigned int ino, const char *process, int pid, int fd)
 219 {
 220         struct user_ent *p, **pp;
 221         int str_len;
 222
 223         str_len = strlen(process) + 1;
 224         p = malloc(sizeof(struct user_ent) + str_len);
 225         if (!p)
 226                 abort();
 227         p->next = NULL;
 228         p->ino = ino;
 229         p->pid = pid;
 230         p->fd = fd;
 231         strcpy(p->process, process);
 232
 233         pp = &user_ent_hash[user_ent_hashfn(ino)];
 234         p->next = *pp;
 235         *pp = p;
 236 }
 237
 238 static void user_ent_hash_build(void)
 239 {
 240         const char *root = getenv("PROC_ROOT") ? : "/proc/";
 241         struct dirent *d;
 242         char name[1024];
 243         int nameoff;
 244         DIR *dir;
 245
 246         strcpy(name, root);
 247         if (strlen(name) == 0 || name[strlen(name)-1] != '/')
 248                 strcat(name, "/");
 249
 250         nameoff = strlen(name);
 251
 252         dir = opendir(name);
 253         if (!dir)
 254                 return;
 255
 256         while ((d = readdir(dir)) != NULL) {
 257                 struct dirent *d1;
 258                 char process[16];
 259                 int pid, pos;
 260                 DIR *dir1;
 261                 char crap;
 262
 263                 if (sscanf(d->d_name, "%d%c", &pid, &crap) != 1)
 264                         continue;
 265
 266                 sprintf(name + nameoff, "%d/fd/", pid);
 267                 pos = strlen(name);
 268                 if ((dir1 = opendir(name)) == NULL)
 269                         continue;
 270
 271                 process[0] = '\0';
 272
 273                 while ((d1 = readdir(dir1)) != NULL) {
 274                         const char *pattern = "socket:[";
 275                         unsigned int ino;
 276                         char lnk[64];
 277                         int fd;
 278                         ssize_t link_len;
 279
 280                         if (sscanf(d1->d_name, "%d%c", &fd, &crap) != 1)
 281                                 continue;
 282
 283                         sprintf(name+pos, "%d", fd);
 284
 285                         link_len = readlink(name, lnk, sizeof(lnk)-1);
 286                         if (link_len == -1)
 287                                 continue;
 288                         lnk[link_len] = '\0';
 289
 290                         if (strncmp(lnk, pattern, strlen(pattern)))
 291                                 continue;
 292
 293                         sscanf(lnk, "socket:[%u]", &ino);
 294
 295                         if (process[0] == '\0') {
 296                                 char tmp[1024];
 297                                 FILE *fp;
 298
 299                                 snprintf(tmp, sizeof(tmp), "%s/%d/stat", root, pid);
 300                                 if ((fp = fopen(tmp, "r")) != NULL) {
 301                                         fscanf(fp, "%*d (%[^)])", process);
 302                                         fclose(fp);
 303                                 }
 304                         }
 305
 306                         user_ent_add(ino, process, pid, fd);
 307                 }
 308                 closedir(dir1);
 309         }
 310         closedir(dir);
 311 }
 312
 313 int find_users(unsigned ino, char *buf, int buflen)
 314 {
 315         struct user_ent *p;
 316         int cnt = 0;
 317         char *ptr;
 318
 319         if (!ino)
 320                 return 0;
 321
 322         p = user_ent_hash[user_ent_hashfn(ino)];
 323         ptr = buf;
 324         while (p) {
 325                 if (p->ino != ino)
 326                         goto next;
 327
 328                 if (ptr - buf >= buflen - 1)
 329                         break;
 330
 331                 snprintf(ptr, buflen - (ptr - buf),
 332                          "(\"%s\",%d,%d),",
 333                          p->process, p->pid, p->fd);
 334                 ptr += strlen(ptr);
 335                 cnt++;
 336
 337         next:
 338                 p = p->next;
 339         }
 340
 341         if (ptr != buf)
 342                 ptr[-1] = '\0';
 343
 344         return cnt;
 345 }
 346
 347 /* Get stats from slab */
 348
 349 struct slabstat
 350 {
 351         int socks;
 352         int tcp_ports;
 353         int tcp_tws;
 354         int tcp_syns;
 355         int skbs;
 356 };
 357
 358 struct slabstat slabstat;
 359
 360 static const char *slabstat_ids[] =
 361 {
 362         "sock",
 363         "tcp_bind_bucket",
 364         "tcp_tw_bucket",
 365         "tcp_open_request",
 366         "skbuff_head_cache",
 367 };
 368
 369 int get_slabstat(struct slabstat *s)
 370 {
 371         char buf[256];
 372         FILE *fp;
 373         int cnt;
 374
 375         memset(s, 0, sizeof(*s));
 376
 377         fp = slabinfo_open();
 378         if (!fp)
 379                 return -1;
 380
 381         cnt = sizeof(*s)/sizeof(int);
 382
 383         fgets(buf, sizeof(buf), fp);
 384         while(fgets(buf, sizeof(buf), fp) != NULL) {
 385                 int i;
 386                 for (i=0; i<sizeof(slabstat_ids)/sizeof(slabstat_ids[0]); i++) {
 387                         if (memcmp(buf, slabstat_ids[i], strlen(slabstat_ids[i])) == 0) {
 388                                 sscanf(buf, "%*s%d", ((int *)s) + i);
 389                                 cnt--;
 390                                 break;
 391                         }
 392                 }
 393                 if (cnt <= 0)
 394                         break;
 395         }
 396
 397         fclose(fp);
 398         return 0;
 399 }
 400
 401 static const char *sstate_name[] = {
 402         "UNKNOWN",
 403         [TCP_ESTABLISHED] = "ESTAB",
 404         [TCP_SYN_SENT] = "SYN-SENT",
 405         [TCP_SYN_RECV] = "SYN-RECV",
 406         [TCP_FIN_WAIT1] = "FIN-WAIT-1",
 407         [TCP_FIN_WAIT2] = "FIN-WAIT-2",
 408         [TCP_TIME_WAIT] = "TIME-WAIT",
 409         [TCP_CLOSE] = "UNCONN",
 410         [TCP_CLOSE_WAIT] = "CLOSE-WAIT",
 411         [TCP_LAST_ACK] = "LAST-ACK",
 412         [TCP_LISTEN] =  "LISTEN",
 413         [TCP_CLOSING] = "CLOSING",
 414 };
 415
 416 static const char *sstate_namel[] = {
 417         "UNKNOWN",
 418         [TCP_ESTABLISHED] = "established",
 419         [TCP_SYN_SENT] = "syn-sent",
 420         [TCP_SYN_RECV] = "syn-recv",
 421         [TCP_FIN_WAIT1] = "fin-wait-1",
 422         [TCP_FIN_WAIT2] = "fin-wait-2",
 423         [TCP_TIME_WAIT] = "time-wait",
 424         [TCP_CLOSE] = "unconnected",
 425         [TCP_CLOSE_WAIT] = "close-wait",
 426         [TCP_LAST_ACK] = "last-ack",
 427         [TCP_LISTEN] =  "listening",
 428         [TCP_CLOSING] = "closing",
 429 };
 430
 431 struct tcpstat
 432 {
 433         inet_prefix     local;
 434         inet_prefix     remote;
 435         int             lport;
 436         int             rport;
 437         int             state;
 438         int             rq, wq;
 439         int             timer;
 440         int             timeout;
 441         int             retrs;
 442         unsigned        ino;
 443         int             probes;
 444         unsigned        uid;
 445         int             refcnt;
 446         unsigned long long sk;
 447         int             rto, ato, qack, cwnd, ssthresh;
 448 };
 449
 450 static const char *tmr_name[] = {
 451         "off",
 452         "on",
 453         "keepalive",
 454         "timewait",
 455         "persist",
 456         "unknown"
 457 };
 458
 459 const char *print_ms_timer(int timeout)
 460 {
 461         static char buf[64];
 462         int secs, msecs, minutes;
 463         if (timeout < 0)
 464                 timeout = 0;
 465         secs = timeout/1000;
 466         minutes = secs/60;
 467         secs = secs%60;
 468         msecs = timeout%1000;
 469         buf[0] = 0;
 470         if (minutes) {
 471                 msecs = 0;
 472                 snprintf(buf, sizeof(buf)-16, "%dmin", minutes);
 473                 if (minutes > 9)
 474                         secs = 0;
 475         }
 476         if (secs) {
 477                 if (secs > 9)
 478                         msecs = 0;
 479                 sprintf(buf+strlen(buf), "%d%s", secs, msecs ? "." : "sec");
 480         }
 481         if (msecs)
 482                 sprintf(buf+strlen(buf), "%03dms", msecs);
 483         return buf;
 484 }
 485
 486 const char *print_hz_timer(int timeout)
 487 {
 488         int hz = get_user_hz();
 489         return print_ms_timer(((timeout*1000) + hz-1)/hz);
 490 }
 491
 492 struct scache
 493 {
 494         struct scache *next;
 495         int port;
 496         char *name;
 497         const char *proto;
 498 };
 499
 500 struct scache *rlist;
 501
 502 void init_service_resolver(void)
 503 {
 504         char buf[128];
 505         FILE *fp = popen("/usr/sbin/rpcinfo -p 2>/dev/null", "r");
 506         if (fp) {
 507                 fgets(buf, sizeof(buf), fp);
 508                 while (fgets(buf, sizeof(buf), fp) != NULL) {
 509                         unsigned int progn, port;
 510                         char proto[128], prog[128];
 511                         if (sscanf(buf, "%u %*d %s %u %s", &progn, proto,
 512                                    &port, prog+4) == 4) {
 513                                 struct scache *c = malloc(sizeof(*c));
 514                                 if (c) {
 515                                         c->port = port;
 516                                         memcpy(prog, "rpc.", 4);
 517                                         c->name = strdup(prog);
 518                                         if (strcmp(proto, TCP_PROTO) == 0)
 519                                                 c->proto = TCP_PROTO;
 520                                         else if (strcmp(proto, UDP_PROTO) == 0)
 521                                                 c->proto = UDP_PROTO;
 522                                         else
 523                                                 c->proto = NULL;
 524                                         c->next = rlist;
 525                                         rlist = c;
 526                                 }
 527                         }
 528                 }
 529                 pclose(fp);
 530         }
 531 }
 532
 533 static int ip_local_port_min, ip_local_port_max;
 534
 535 /* Even do not try default linux ephemeral port ranges:
 536  * default /etc/services contains so much of useless crap
 537  * wouldbe "allocated" to this area that resolution
 538  * is really harmful. I shrug each time when seeing
 539  * "socks" or "cfinger" in dumps.
 540  */
 541 static int is_ephemeral(int port)
 542 {
 543         if (!ip_local_port_min) {
 544                 FILE *f = ephemeral_ports_open();
 545                 if (f) {
 546                         fscanf(f, "%d %d",
 547                                &ip_local_port_min, &ip_local_port_max);
 548                         fclose(f);
 549                 } else {
 550                         ip_local_port_min = 1024;
 551                         ip_local_port_max = 4999;
 552                 }
 553         }
 554
 555         return (port >= ip_local_port_min && port<= ip_local_port_max);
 556 }
 557
 558
 559 const char *__resolve_service(int port)
 560 {
 561         struct scache *c;
 562
 563         for (c = rlist; c; c = c->next) {
 564                 if (c->port == port && c->proto == dg_proto)
 565                         return c->name;
 566         }
 567
 568         if (!is_ephemeral(port)) {
 569                 static int notfirst;
 570                 struct servent *se;
 571                 if (!notfirst) {
 572                         setservent(1);
 573                         notfirst = 1;
 574                 }
 575                 se = getservbyport(htons(port), dg_proto);
 576                 if (se)
 577                         return se->s_name;
 578         }
 579
 580         return NULL;
 581 }
 582
 583
 584 const char *resolve_service(int port)
 585 {
 586         static char buf[128];
 587         static struct scache cache[256];
 588
 589         if (port == 0) {
 590                 buf[0] = '*';
 591                 buf[1] = 0;
 592                 return buf;
 593         }
 594
 595         if (resolve_services) {
 596                 if (dg_proto == RAW_PROTO) {
 597                         return inet_proto_n2a(port, buf, sizeof(buf));
 598                 } else {
 599                         struct scache *c;
 600                         const char *res;
 601                         int hash = (port^(((unsigned long)dg_proto)>>2))&255;
 602
 603                         for (c = &cache[hash]; c; c = c->next) {
 604                                 if (c->port == port &&
 605                                     c->proto == dg_proto) {
 606                                         if (c->name)
 607                                                 return c->name;
 608                                         goto do_numeric;
 609                                 }
 610                         }
 611
 612                         if ((res = __resolve_service(port)) != NULL) {
 613                                 if ((c = malloc(sizeof(*c))) == NULL)
 614                                         goto do_numeric;
 615                         } else {
 616                                 c = &cache[hash];
 617                                 if (c->name)
 618                                         free(c->name);
 619                         }
 620                         c->port = port;
 621                         c->name = NULL;
 622                         c->proto = dg_proto;
 623                         if (res) {
 624                                 c->name = strdup(res);
 625                                 c->next = cache[hash].next;
 626                                 cache[hash].next = c;
 627                         }
 628                         if (c->name)
 629                                 return c->name;
 630                 }
 631         }
 632
 633         do_numeric:
 634         sprintf(buf, "%u", port);
 635         return buf;
 636 }
 637
 638 void formatted_print(const inet_prefix *a, int port)
 639 {
 640         char buf[1024];
 641         const char *ap = buf;
 642         int est_len;
 643
 644         est_len = addr_width;
 645
 646         if (a->family == AF_INET) {
 647                 if (a->data[0] == 0) {
 648                         buf[0] = '*';
 649                         buf[1] = 0;
 650                 } else {
 651                         ap = format_host(AF_INET, 4, a->data, buf, sizeof(buf));
 652                 }
 653         } else {
 654                 ap = format_host(a->family, 16, a->data, buf, sizeof(buf));
 655                 est_len = strlen(ap);
 656                 if (est_len <= addr_width)
 657                         est_len = addr_width;
 658                 else
 659                         est_len = addr_width + ((est_len-addr_width+3)/4)*4;
 660         }
 661         printf("%*s:%-*s ", est_len, ap, serv_width, resolve_service(port));
 662 }
 663
 664 struct aafilter
 665 {
 666         inet_prefix     addr;
 667         int             port;
 668         struct aafilter *next;
 669 };
 670
 671 int inet2_addr_match(const inet_prefix *a, const inet_prefix *p, int plen)
 672 {
 673         if (!inet_addr_match(a, p, plen))
 674                 return 0;
 675
 676         /* Cursed "v4 mapped" addresses: v4 mapped socket matches
 677          * pure IPv4 rule, but v4-mapped rule selects only v4-mapped
 678          * sockets. Fair? */
 679         if (p->family == AF_INET && a->family == AF_INET6) {
 680                 if (a->data[0] == 0 && a->data[1] == 0 &&
 681                     a->data[2] == htonl(0xffff)) {
 682                         inet_prefix tmp = *a;
 683                         tmp.data[0] = a->data[3];
 684                         return inet_addr_match(&tmp, p, plen);
 685                 }
 686         }
 687         return 1;
 688 }
 689
 690 int unix_match(const inet_prefix *a, const inet_prefix *p)
 691 {
 692         char *addr, *pattern;
 693         memcpy(&addr, a->data, sizeof(addr));
 694         memcpy(&pattern, p->data, sizeof(pattern));
 695         if (pattern == NULL)
 696                 return 1;
 697         if (addr == NULL)
 698                 addr = "";
 699         return !fnmatch(pattern, addr, 0);
 700 }
 701
 702 int run_ssfilter(struct ssfilter *f, struct tcpstat *s)
 703 {
 704         switch (f->type) {
 705                 case SSF_S_AUTO:
 706         {
 707                 static int low, high=65535;
 708
 709                 if (s->local.family == AF_UNIX) {
 710                         char *p;
 711                         memcpy(&p, s->local.data, sizeof(p));
 712                         return p == NULL || (p[0] == '@' && strlen(p) == 6 &&
 713                                              strspn(p+1, "0123456789abcdef") == 5);
 714                 }
 715                 if (s->local.family == AF_PACKET)
 716                         return s->lport == 0 && s->local.data == 0;
 717                 if (s->local.family == AF_NETLINK)
 718                         return s->lport < 0;
 719
 720                 if (!low) {
 721                         FILE *fp = ephemeral_ports_open();
 722                         if (fp) {
 723                                 fscanf(fp, "%d%d", &low, &high);
 724                                 fclose(fp);
 725                         }
 726                 }
 727                 return s->lport >= low && s->lport <= high;
 728         }
 729                 case SSF_DCOND:
 730         {
 731                 struct aafilter *a = (void*)f->pred;
 732                 if (a->addr.family == AF_UNIX)
 733                         return unix_match(&s->remote, &a->addr);
 734                 if (a->port != -1 && a->port != s->rport)
 735                         return 0;
 736                 if (a->addr.bitlen) {
 737                         do {
 738                                 if (!inet2_addr_match(&s->remote, &a->addr, a->addr.bitlen))
 739                                         return 1;
 740                         } while ((a = a->next) != NULL);
 741                         return 0;
 742                 }
 743                 return 1;
 744         }
 745                 case SSF_SCOND:
 746         {
 747                 struct aafilter *a = (void*)f->pred;
 748                 if (a->addr.family == AF_UNIX)
 749                         return unix_match(&s->local, &a->addr);
 750                 if (a->port != -1 && a->port != s->lport)
 751                         return 0;
 752                 if (a->addr.bitlen) {
 753                         do {
 754                                 if (!inet2_addr_match(&s->local, &a->addr, a->addr.bitlen))
 755                                         return 1;
 756                         } while ((a = a->next) != NULL);
 757                         return 0;
 758                 }
 759                 return 1;
 760         }
 761                 case SSF_D_GE:
 762         {
 763                 struct aafilter *a = (void*)f->pred;
 764                 return s->rport >= a->port;
 765         }
 766                 case SSF_D_LE:
 767         {
 768                 struct aafilter *a = (void*)f->pred;
 769                 return s->rport <= a->port;
 770         }
 771                 case SSF_S_GE:
 772         {
 773                 struct aafilter *a = (void*)f->pred;
 774                 return s->lport >= a->port;
 775         }
 776                 case SSF_S_LE:
 777         {
 778                 struct aafilter *a = (void*)f->pred;
 779                 return s->lport <= a->port;
 780         }
 781
 782                 /* Yup. It is recursion. Sorry. */
 783                 case SSF_AND:
 784                 return run_ssfilter(f->pred, s) && run_ssfilter(f->post, s);
 785                 case SSF_OR:
 786                 return run_ssfilter(f->pred, s) || run_ssfilter(f->post, s);
 787                 case SSF_NOT:
 788                 return !run_ssfilter(f->pred, s);
 789                 default:
 790                 abort();
 791         }
 792 }
 793
 794 /* Relocate external jumps by reloc. */
 795 static void ssfilter_patch(char *a, int len, int reloc)
 796 {
 797         while (len > 0) {
 798                 struct inet_diag_bc_op *op = (struct inet_diag_bc_op*)a;
 799                 if (op->no == len+4)
 800                         op->no += reloc;
 801                 len -= op->yes;
 802                 a += op->yes;
 803         }
 804         if (len < 0)
 805                 abort();
 806 }
 807
 808 static int ssfilter_bytecompile(struct ssfilter *f, char **bytecode)
 809 {
 810         switch (f->type) {
 811                 case SSF_S_AUTO:
 812         {
 813                 if (!(*bytecode=malloc(4))) abort();
 814                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_AUTO, 4, 8 };
 815                 return 4;
 816         }
 817                 case SSF_DCOND:
 818                 case SSF_SCOND:
 819         {
 820                 struct aafilter *a = (void*)f->pred;
 821                 struct aafilter *b;
 822                 char *ptr;
 823                 int  code = (f->type == SSF_DCOND ? INET_DIAG_BC_D_COND : INET_DIAG_BC_S_COND);
 824                 int len = 0;
 825
 826                 for (b=a; b; b=b->next) {
 827                         len += 4 + sizeof(struct inet_diag_hostcond);
 828                         if (a->addr.family == AF_INET6)
 829                                 len += 16;
 830                         else
 831                                 len += 4;
 832                         if (b->next)
 833                                 len += 4;
 834                 }
 835                 if (!(ptr = malloc(len))) abort();
 836                 *bytecode = ptr;
 837                 for (b=a; b; b=b->next) {
 838                         struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)ptr;
 839                         int alen = (a->addr.family == AF_INET6 ? 16 : 4);
 840                         int oplen = alen + 4 + sizeof(struct inet_diag_hostcond);
 841                         struct inet_diag_hostcond *cond = (struct inet_diag_hostcond*)(ptr+4);
 842
 843                         *op = (struct inet_diag_bc_op){ code, oplen, oplen+4 };
 844                         cond->family = a->addr.family;
 845                         cond->port = a->port;
 846                         cond->prefix_len = a->addr.bitlen;
 847                         memcpy(cond->addr, a->addr.data, alen);
 848                         ptr += oplen;
 849                         if (b->next) {
 850                                 op = (struct inet_diag_bc_op *)ptr;
 851                                 *op = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, len - (ptr-*bytecode)};
 852                                 ptr += 4;
 853                         }
 854                 }
 855                 return ptr - *bytecode;
 856         }
 857                 case SSF_D_GE:
 858         {
 859                 struct aafilter *x = (void*)f->pred;
 860                 if (!(*bytecode=malloc(8))) abort();
 861                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_GE, 8, 12 };
 862                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 863                 return 8;
 864         }
 865                 case SSF_D_LE:
 866         {
 867                 struct aafilter *x = (void*)f->pred;
 868                 if (!(*bytecode=malloc(8))) abort();
 869                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_LE, 8, 12 };
 870                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 871                 return 8;
 872         }
 873                 case SSF_S_GE:
 874         {
 875                 struct aafilter *x = (void*)f->pred;
 876                 if (!(*bytecode=malloc(8))) abort();
 877                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_GE, 8, 12 };
 878                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 879                 return 8;
 880         }
 881                 case SSF_S_LE:
 882         {
 883                 struct aafilter *x = (void*)f->pred;
 884                 if (!(*bytecode=malloc(8))) abort();
 885                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_LE, 8, 12 };
 886                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 887                 return 8;
 888         }
 889
 890                 case SSF_AND:
 891         {
 892                 char *a1, *a2, *a, l1, l2;
 893                 l1 = ssfilter_bytecompile(f->pred, &a1);
 894                 l2 = ssfilter_bytecompile(f->post, &a2);
 895                 if (!(a = malloc(l1+l2))) abort();
 896                 memcpy(a, a1, l1);
 897                 memcpy(a+l1, a2, l2);
 898                 free(a1); free(a2);
 899                 ssfilter_patch(a, l1, l2);
 900                 *bytecode = a;
 901                 return l1+l2;
 902         }
 903                 case SSF_OR:
 904         {
 905                 char *a1, *a2, *a, l1, l2;
 906                 l1 = ssfilter_bytecompile(f->pred, &a1);
 907                 l2 = ssfilter_bytecompile(f->post, &a2);
 908                 if (!(a = malloc(l1+l2+4))) abort();
 909                 memcpy(a, a1, l1);
 910                 memcpy(a+l1+4, a2, l2);
 911                 free(a1); free(a2);
 912                 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, l2+4 };
 913                 *bytecode = a;
 914                 return l1+l2+4;
 915         }
 916                 case SSF_NOT:
 917         {
 918                 char *a1, *a, l1;
 919                 l1 = ssfilter_bytecompile(f->pred, &a1);
 920                 if (!(a = malloc(l1+4))) abort();
 921                 memcpy(a, a1, l1);
 922                 free(a1);
 923                 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, 8 };
 924                 *bytecode = a;
 925                 return l1+4;
 926         }
 927                 default:
 928                 abort();
 929         }
 930 }
 931
 932 static int remember_he(struct aafilter *a, struct hostent *he)
 933 {
 934         char **ptr = he->h_addr_list;
 935         int cnt = 0;
 936         int len;
 937
 938         if (he->h_addrtype == AF_INET)
 939                 len = 4;
 940         else if (he->h_addrtype == AF_INET6)
 941                 len = 16;
 942         else
 943                 return 0;
 944
 945         while (*ptr) {
 946                 struct aafilter *b = a;
 947                 if (a->addr.bitlen) {
 948                         if ((b = malloc(sizeof(*b))) == NULL)
 949                                 return cnt;
 950                         *b = *a;
 951                         b->next = a->next;
 952                         a->next = b;
 953                 }
 954                 memcpy(b->addr.data, *ptr, len);
 955                 b->addr.bytelen = len;
 956                 b->addr.bitlen = len*8;
 957                 b->addr.family = he->h_addrtype;
 958                 ptr++;
 959                 cnt++;
 960         }
 961         return cnt;
 962 }
 963
 964 static int get_dns_host(struct aafilter *a, const char *addr, int fam)
 965 {
 966         static int notfirst;
 967         int cnt = 0;
 968         struct hostent *he;
 969
 970         a->addr.bitlen = 0;
 971         if (!notfirst) {
 972                 sethostent(1);
 973                 notfirst = 1;
 974         }
 975         he = gethostbyname2(addr, fam == AF_UNSPEC ? AF_INET : fam);
 976         if (he)
 977                 cnt = remember_he(a, he);
 978         if (fam == AF_UNSPEC) {
 979                 he = gethostbyname2(addr, AF_INET6);
 980                 if (he)
 981                         cnt += remember_he(a, he);
 982         }
 983         return !cnt;
 984 }
 985
 986 static int xll_initted = 0;
 987
 988 static void xll_init(void)
 989 {
 990         struct rtnl_handle rth;
 991         rtnl_open(&rth, 0);
 992         ll_init_map(&rth);
 993         rtnl_close(&rth);
 994         xll_initted = 1;
 995 }
 996
 997 static const char *xll_index_to_name(int index)
 998 {
 999         if (!xll_initted)
1000                 xll_init();
1001         return ll_index_to_name(index);
1002 }
1003
1004 static int xll_name_to_index(const char *dev)
1005 {
1006         if (!xll_initted)
1007                 xll_init();
1008         return ll_name_to_index(dev);
1009 }
1010
1011 void *parse_hostcond(char *addr)
1012 {
1013         char *port = NULL;
1014         struct aafilter a;
1015         struct aafilter *res;
1016         int fam = preferred_family;
1017
1018         memset(&a, 0, sizeof(a));
1019         a.port = -1;
1020
1021         if (fam == AF_UNIX || strncmp(addr, "unix:", 5) == 0) {
1022                 char *p;
1023                 a.addr.family = AF_UNIX;
1024                 if (strncmp(addr, "unix:", 5) == 0)
1025                         addr+=5;
1026                 p = strdup(addr);
1027                 a.addr.bitlen = 8*strlen(p);
1028                 memcpy(a.addr.data, &p, sizeof(p));
1029                 goto out;
1030         }
1031
1032         if (fam == AF_PACKET || strncmp(addr, "link:", 5) == 0) {
1033                 a.addr.family = AF_PACKET;
1034                 a.addr.bitlen = 0;
1035                 if (strncmp(addr, "link:", 5) == 0)
1036                         addr+=5;
1037                 port = strchr(addr, ':');
1038                 if (port) {
1039                         *port = 0;
1040                         if (port[1] && strcmp(port+1, "*")) {
1041                                 if (get_integer(&a.port, port+1, 0)) {
1042                                         if ((a.port = xll_name_to_index(port+1)) <= 0)
1043                                                 return NULL;
1044                                 }
1045                         }
1046                 }
1047                 if (addr[0] && strcmp(addr, "*")) {
1048                         unsigned short tmp;
1049                         a.addr.bitlen = 32;
1050                         if (ll_proto_a2n(&tmp, addr))
1051                                 return NULL;
1052                         a.addr.data[0] = ntohs(tmp);
1053                 }
1054                 goto out;
1055         }
1056
1057         if (fam == AF_NETLINK || strncmp(addr, "netlink:", 8) == 0) {
1058                 a.addr.family = AF_NETLINK;
1059                 a.addr.bitlen = 0;
1060                 if (strncmp(addr, "netlink:", 8) == 0)
1061                         addr+=8;
1062                 port = strchr(addr, ':');
1063                 if (port) {
1064                         *port = 0;
1065                         if (port[1] && strcmp(port+1, "*")) {
1066                                 if (get_integer(&a.port, port+1, 0)) {
1067                                         if (strcmp(port+1, "kernel") == 0)
1068                                                 a.port = 0;
1069                                         else
1070                                                 return NULL;
1071                                 }
1072                         }
1073                 }
1074                 if (addr[0] && strcmp(addr, "*")) {
1075                         a.addr.bitlen = 32;
1076                         if (get_u32(a.addr.data, addr, 0)) {
1077                                 if (strcmp(addr, "rtnl") == 0)
1078                                         a.addr.data[0] = 0;
1079                                 else if (strcmp(addr, "fw") == 0)
1080                                         a.addr.data[0] = 3;
1081                                 else if (strcmp(addr, "tcpdiag") == 0)
1082                                         a.addr.data[0] = 4;
1083                                 else
1084                                         return NULL;
1085                         }
1086                 }
1087                 goto out;
1088         }
1089
1090         if (strncmp(addr, "inet:", 5) == 0) {
1091                 addr += 5;
1092                 fam = AF_INET;
1093         } else if (strncmp(addr, "inet6:", 6) == 0) {
1094                 addr += 6;
1095                 fam = AF_INET6;
1096         }
1097
1098         /* URL-like literal [] */
1099         if (addr[0] == '[') {
1100                 addr++;
1101                 if ((port = strchr(addr, ']')) == NULL)
1102                         return NULL;
1103                 *port++ = 0;
1104         } else if (addr[0] == '*') {
1105                 port = addr+1;
1106         } else {
1107                 port = strrchr(strchr(addr, '/') ? : addr, ':');
1108         }
1109         if (port && *port) {
1110                 if (*port != ':')
1111                         return NULL;
1112                 *port++ = 0;
1113                 if (*port && *port != '*') {
1114                         if (get_integer(&a.port, port, 0)) {
1115                                 struct servent *se1 = NULL;
1116                                 struct servent *se2 = NULL;
1117                                 if (current_filter.dbs&(1<<UDP_DB))
1118                                         se1 = getservbyname(port, UDP_PROTO);
1119                                 if (current_filter.dbs&(1<<TCP_DB))
1120                                         se2 = getservbyname(port, TCP_PROTO);
1121                                 if (se1 && se2 && se1->s_port != se2->s_port) {
1122                                         fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1123                                         return NULL;
1124                                 }
1125                                 if (!se1)
1126                                         se1 = se2;
1127                                 if (se1) {
1128                                         a.port = ntohs(se1->s_port);
1129                                 } else {
1130                                         struct scache *s;
1131                                         for (s = rlist; s; s = s->next) {
1132                                                 if ((s->proto == UDP_PROTO &&
1133                                                      (current_filter.dbs&(1<<UDP_DB))) ||
1134                                                     (s->proto == TCP_PROTO &&
1135                                                      (current_filter.dbs&(1<<TCP_DB)))) {
1136                                                         if (s->name && strcmp(s->name, port) == 0) {
1137                                                                 if (a.port > 0 && a.port != s->port) {
1138                                                                         fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1139                                                                         return NULL;
1140                                                                 }
1141                                                                 a.port = s->port;
1142                                                         }
1143                                                 }
1144                                         }
1145                                         if (a.port <= 0) {
1146                                                 fprintf(stderr, "Error: \"%s\" does not look like a port.\n", port);
1147                                                 return NULL;
1148                                         }
1149                                 }
1150                         }
1151                 }
1152         }
1153         if (addr && *addr && *addr != '*') {
1154                 if (get_prefix_1(&a.addr, addr, fam)) {
1155                         if (get_dns_host(&a, addr, fam)) {
1156                                 fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", addr);
1157                                 return NULL;
1158                         }
1159                 }
1160         }
1161
1162         out:
1163         res = malloc(sizeof(*res));
1164         if (res)
1165                 memcpy(res, &a, sizeof(a));
1166         return res;
1167 }
1168
1169 static int tcp_show_line(char *line, const struct filter *f, int family)
1170 {
1171         struct tcpstat s;
1172         char *loc, *rem, *data;
1173         char opt[256];
1174         int n;
1175         char *p;
1176
1177         if ((p = strchr(line, ':')) == NULL)
1178                 return -1;
1179         loc = p+2;
1180
1181         if ((p = strchr(loc, ':')) == NULL)
1182                 return -1;
1183         p[5] = 0;
1184         rem = p+6;
1185
1186         if ((p = strchr(rem, ':')) == NULL)
1187                 return -1;
1188         p[5] = 0;
1189         data = p+6;
1190
1191         do {
1192                 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
1193
1194                 if (!(f->states & (1<<state)))
1195                         return 0;
1196         } while (0);
1197
1198         s.local.family = s.remote.family = family;
1199         if (family == AF_INET) {
1200                 sscanf(loc, "%x:%x", s.local.data, (unsigned*)&s.lport);
1201                 sscanf(rem, "%x:%x", s.remote.data, (unsigned*)&s.rport);
1202                 s.local.bytelen = s.remote.bytelen = 4;
1203         } else {
1204                 sscanf(loc, "%08x%08x%08x%08x:%x",
1205                        s.local.data,
1206                        s.local.data+1,
1207                        s.local.data+2,
1208                        s.local.data+3,
1209                        &s.lport);
1210                 sscanf(rem, "%08x%08x%08x%08x:%x",
1211                        s.remote.data,
1212                        s.remote.data+1,
1213                        s.remote.data+2,
1214                        s.remote.data+3,
1215                        &s.rport);
1216                 s.local.bytelen = s.remote.bytelen = 16;
1217         }
1218
1219         if (f->f && run_ssfilter(f->f, &s) == 0)
1220                 return 0;
1221
1222         opt[0] = 0;
1223         n = sscanf(data, "%x %x:%x %x:%x %x %d %d %u %d %llx %d %d %d %d %d %[^\n]\n",
1224                    &s.state, &s.wq, &s.rq,
1225                    &s.timer, &s.timeout, &s.retrs, &s.uid, &s.probes, &s.ino,
1226                    &s.refcnt, &s.sk, &s.rto, &s.ato, &s.qack,
1227                    &s.cwnd, &s.ssthresh, opt);
1228
1229         if (n < 17)
1230                 opt[0] = 0;
1231
1232         if (n < 12) {
1233                 s.rto = 0;
1234                 s.cwnd = 2;
1235                 s.ssthresh = -1;
1236                 s.ato = s.qack = 0;
1237         }
1238
1239         if (netid_width)
1240                 printf("%-*s ", netid_width, "tcp");
1241         if (state_width)
1242                 printf("%-*s ", state_width, sstate_name[s.state]);
1243
1244         printf("%-6d %-6d ", s.rq, s.wq);
1245
1246         formatted_print(&s.local, s.lport);
1247         formatted_print(&s.remote, s.rport);
1248
1249         if (show_options) {
1250                 if (s.timer) {
1251                         if (s.timer > 4)
1252                                 s.timer = 5;
1253                         printf(" timer:(%s,%s,%d)",
1254                                tmr_name[s.timer],
1255                                print_hz_timer(s.timeout),
1256                                s.timer != 1 ? s.probes : s.retrs);
1257                 }
1258         }
1259         if (show_tcpinfo) {
1260                 int hz = get_user_hz();
1261                 if (s.rto && s.rto != 3*hz)
1262                         printf(" rto:%g", (double)s.rto/hz);
1263                 if (s.ato)
1264                         printf(" ato:%g", (double)s.ato/hz);
1265                 if (s.cwnd != 2)
1266                         printf(" cwnd:%d", s.cwnd);
1267                 if (s.ssthresh != -1)
1268                         printf(" ssthresh:%d", s.ssthresh);
1269                 if (s.qack/2)
1270                         printf(" qack:%d", s.qack/2);
1271                 if (s.qack&1)
1272                         printf(" bidir");
1273         }
1274         if (show_users) {
1275                 char ubuf[4096];
1276                 if (find_users(s.ino, ubuf, sizeof(ubuf)) > 0)
1277                         printf(" users:(%s)", ubuf);
1278         }
1279         if (show_details) {
1280                 if (s.uid)
1281                         printf(" uid:%u", (unsigned)s.uid);
1282                 printf(" ino:%u", s.ino);
1283                 printf(" sk:%llx", s.sk);
1284                 if (opt[0])
1285                         printf(" opt:\"%s\"", opt);
1286         }
1287         printf("\n");
1288
1289         return 0;
1290 }
1291
1292 static int generic_record_read(FILE *fp,
1293                                int (*worker)(char*, const struct filter *, int),
1294                                const struct filter *f, int fam)
1295 {
1296         char line[256];
1297
1298         /* skip header */
1299         if (fgets(line, sizeof(line), fp) == NULL)
1300                 goto outerr;
1301
1302         while (fgets(line, sizeof(line), fp) != NULL) {
1303                 int n = strlen(line);
1304                 if (n == 0 || line[n-1] != '\n') {
1305                         errno = -EINVAL;
1306                         return -1;
1307                 }
1308                 line[n-1] = 0;
1309
1310                 if (worker(line, f, fam) < 0)
1311                         return 0;
1312         }
1313 outerr:
1314
1315         return ferror(fp) ? -1 : 0;
1316 }
1317
1318 static char *sprint_bw(char *buf, double bw)
1319 {
1320         if (bw > 1000000.)
1321                 sprintf(buf,"%.1fM", bw / 1000000.);
1322         else if (bw > 1000.)
1323                 sprintf(buf,"%.1fK", bw / 1000.);
1324         else
1325                 sprintf(buf, "%g", bw);
1326
1327         return buf;
1328 }
1329
1330 static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r)
1331 {
1332         struct rtattr * tb[INET_DIAG_MAX+1];
1333         char b1[64];
1334         double rtt = 0;
1335
1336         parse_rtattr(tb, INET_DIAG_MAX, (struct rtattr*)(r+1),
1337                      nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
1338
1339         if (tb[INET_DIAG_MEMINFO]) {
1340                 const struct inet_diag_meminfo *minfo
1341                         = RTA_DATA(tb[INET_DIAG_MEMINFO]);
1342                 printf(" mem:(r%u,w%u,f%u,t%u)",
1343                        minfo->idiag_rmem,
1344                        minfo->idiag_wmem,
1345                        minfo->idiag_fmem,
1346                        minfo->idiag_tmem);
1347         }
1348
1349         if (tb[INET_DIAG_INFO]) {
1350                 struct tcp_info *info;
1351                 int len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
1352
1353                 /* workaround for older kernels with less fields */
1354                 if (len < sizeof(*info)) {
1355                         info = alloca(sizeof(*info));
1356                         memset(info, 0, sizeof(*info));
1357                         memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
1358                 } else
1359                         info = RTA_DATA(tb[INET_DIAG_INFO]);
1360
1361                 if (show_options) {
1362                         if (info->tcpi_options & TCPI_OPT_TIMESTAMPS)
1363                                 printf(" ts");
1364                         if (info->tcpi_options & TCPI_OPT_SACK)
1365                                 printf(" sack");
1366                         if (info->tcpi_options & TCPI_OPT_ECN)
1367                                 printf(" ecn");
1368                         if (info->tcpi_options & TCPI_OPT_ECN_SEEN)
1369                                 printf(" ecnseen");
1370                 }
1371
1372                 if (tb[INET_DIAG_CONG])
1373                         printf(" %s", (char *) RTA_DATA(tb[INET_DIAG_CONG]));
1374
1375                 if (info->tcpi_options & TCPI_OPT_WSCALE)
1376                         printf(" wscale:%d,%d", info->tcpi_snd_wscale,
1377                                info->tcpi_rcv_wscale);
1378                 if (info->tcpi_rto && info->tcpi_rto != 3000000)
1379                         printf(" rto:%g", (double)info->tcpi_rto/1000);
1380                 if (info->tcpi_rtt)
1381                         printf(" rtt:%g/%g", (double)info->tcpi_rtt/1000,
1382                                (double)info->tcpi_rttvar/1000);
1383                 if (info->tcpi_ato)
1384                         printf(" ato:%g", (double)info->tcpi_ato/1000);
1385                 if (info->tcpi_snd_cwnd != 2)
1386                         printf(" cwnd:%d", info->tcpi_snd_cwnd);
1387                 if (info->tcpi_snd_ssthresh < 0xFFFF)
1388                         printf(" ssthresh:%d", info->tcpi_snd_ssthresh);
1389
1390                 rtt = (double) info->tcpi_rtt;
1391                 if (tb[INET_DIAG_VEGASINFO]) {
1392                         const struct tcpvegas_info *vinfo
1393                                 = RTA_DATA(tb[INET_DIAG_VEGASINFO]);
1394
1395                         if (vinfo->tcpv_enabled &&
1396                             vinfo->tcpv_rtt && vinfo->tcpv_rtt != 0x7fffffff)
1397                                 rtt =  vinfo->tcpv_rtt;
1398                 }
1399
1400                 if (rtt > 0 && info->tcpi_snd_mss && info->tcpi_snd_cwnd) {
1401                         printf(" send %sbps",
1402                                sprint_bw(b1, (double) info->tcpi_snd_cwnd *
1403                                          (double) info->tcpi_snd_mss * 8000000.
1404                                          / rtt));
1405                 }
1406
1407                 if (info->tcpi_rcv_rtt)
1408                         printf(" rcv_rtt:%g", (double) info->tcpi_rcv_rtt/1000);
1409                 if (info->tcpi_rcv_space)
1410                         printf(" rcv_space:%d", info->tcpi_rcv_space);
1411
1412         }
1413 }
1414
1415 static int tcp_show_sock(struct nlmsghdr *nlh, struct filter *f)
1416 {
1417         struct inet_diag_msg *r = NLMSG_DATA(nlh);
1418         struct tcpstat s;
1419
1420         s.state = r->idiag_state;
1421         s.local.family = s.remote.family = r->idiag_family;
1422         s.lport = ntohs(r->id.idiag_sport);
1423         s.rport = ntohs(r->id.idiag_dport);
1424         if (s.local.family == AF_INET) {
1425                 s.local.bytelen = s.remote.bytelen = 4;
1426         } else {
1427                 s.local.bytelen = s.remote.bytelen = 16;
1428         }
1429         memcpy(s.local.data, r->id.idiag_src, s.local.bytelen);
1430         memcpy(s.remote.data, r->id.idiag_dst, s.local.bytelen);
1431
1432         if (f && f->f && run_ssfilter(f->f, &s) == 0)
1433                 return 0;
1434
1435         if (netid_width)
1436                 printf("%-*s ", netid_width, "tcp");
1437         if (state_width)
1438                 printf("%-*s ", state_width, sstate_name[s.state]);
1439
1440         printf("%-6d %-6d ", r->idiag_rqueue, r->idiag_wqueue);
1441
1442         formatted_print(&s.local, s.lport);
1443         formatted_print(&s.remote, s.rport);
1444
1445         if (show_options) {
1446                 if (r->idiag_timer) {
1447                         if (r->idiag_timer > 4)
1448                                 r->idiag_timer = 5;
1449                         printf(" timer:(%s,%s,%d)",
1450                                tmr_name[r->idiag_timer],
1451                                print_ms_timer(r->idiag_expires),
1452                                r->idiag_retrans);
1453                 }
1454         }
1455         if (show_users) {
1456                 char ubuf[4096];
1457                 if (find_users(r->idiag_inode, ubuf, sizeof(ubuf)) > 0)
1458                         printf(" users:(%s)", ubuf);
1459         }
1460         if (show_details) {
1461                 if (r->idiag_uid)
1462                         printf(" uid:%u", (unsigned)r->idiag_uid);
1463                 printf(" ino:%u", r->idiag_inode);
1464                 printf(" sk:");
1465                 if (r->id.idiag_cookie[1] != 0)
1466                         printf("%08x", r->id.idiag_cookie[1]);
1467                 printf("%08x", r->id.idiag_cookie[0]);
1468         }
1469         if (show_mem || show_tcpinfo) {
1470                 printf("\n\t");
1471                 tcp_show_info(nlh, r);
1472         }
1473
1474         printf("\n");
1475
1476         return 0;
1477 }
1478
1479 static int tcp_show_netlink(struct filter *f, FILE *dump_fp, int socktype)
1480 {
1481         int fd;
1482         struct sockaddr_nl nladdr;
1483         struct {
1484                 struct nlmsghdr nlh;
1485                 struct inet_diag_req r;
1486         } req;
1487         char    *bc = NULL;
1488         int     bclen;
1489         struct msghdr msg;
1490         struct rtattr rta;
1491         char    buf[8192];
1492         struct iovec iov[3];
1493
1494         if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG)) < 0)
1495                 return -1;
1496
1497         memset(&nladdr, 0, sizeof(nladdr));
1498         nladdr.nl_family = AF_NETLINK;
1499
1500         req.nlh.nlmsg_len = sizeof(req);
1501         req.nlh.nlmsg_type = socktype;
1502         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
1503         req.nlh.nlmsg_pid = 0;
1504         req.nlh.nlmsg_seq = 123456;
1505         memset(&req.r, 0, sizeof(req.r));
1506         req.r.idiag_family = AF_INET;
1507         req.r.idiag_states = f->states;
1508         if (show_mem)
1509                 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
1510
1511         if (show_tcpinfo) {
1512                 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
1513                 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
1514                 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
1515         }
1516
1517         iov[0] = (struct iovec){
1518                 .iov_base = &req,
1519                 .iov_len = sizeof(req)
1520         };
1521         if (f->f) {
1522                 bclen = ssfilter_bytecompile(f->f, &bc);
1523                 rta.rta_type = INET_DIAG_REQ_BYTECODE;
1524                 rta.rta_len = RTA_LENGTH(bclen);
1525                 iov[1] = (struct iovec){ &rta, sizeof(rta) };
1526                 iov[2] = (struct iovec){ bc, bclen };
1527                 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
1528         }
1529
1530         msg = (struct msghdr) {
1531                 .msg_name = (void*)&nladdr,
1532                 .msg_namelen = sizeof(nladdr),
1533                 .msg_iov = iov,
1534                 .msg_iovlen = f->f ? 3 : 1,
1535         };
1536
1537         if (sendmsg(fd, &msg, 0) < 0)
1538                 return -1;
1539
1540         iov[0] = (struct iovec){
1541                 .iov_base = buf,
1542                 .iov_len = sizeof(buf)
1543         };
1544
1545         while (1) {
1546                 int status;
1547                 struct nlmsghdr *h;
1548
1549                 msg = (struct msghdr) {
1550                         (void*)&nladdr, sizeof(nladdr),
1551                         iov,    1,
1552                         NULL,   0,
1553                         0
1554                 };
1555
1556                 status = recvmsg(fd, &msg, 0);
1557
1558                 if (status < 0) {
1559                         if (errno == EINTR)
1560                                 continue;
1561                         perror("OVERRUN");
1562                         continue;
1563                 }
1564                 if (status == 0) {
1565                         fprintf(stderr, "EOF on netlink\n");
1566                         return 0;
1567                 }
1568
1569                 if (dump_fp)
1570                         fwrite(buf, 1, NLMSG_ALIGN(status), dump_fp);
1571
1572                 h = (struct nlmsghdr*)buf;
1573                 while (NLMSG_OK(h, status)) {
1574                         int err;
1575                         struct inet_diag_msg *r = NLMSG_DATA(h);
1576
1577                         if (/*h->nlmsg_pid != rth->local.nl_pid ||*/
1578                             h->nlmsg_seq != 123456)
1579                                 goto skip_it;
1580
1581                         if (h->nlmsg_type == NLMSG_DONE)
1582                                 return 0;
1583                         if (h->nlmsg_type == NLMSG_ERROR) {
1584                                 struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
1585                                 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
1586                                         fprintf(stderr, "ERROR truncated\n");
1587                                 } else {
1588                                         errno = -err->error;
1589                                         perror("TCPDIAG answers");
1590                                 }
1591                                 return 0;
1592                         }
1593                         if (!dump_fp) {
1594                                 if (!(f->families & (1<<r->idiag_family))) {
1595                                         h = NLMSG_NEXT(h, status);
1596                                         continue;
1597                                 }
1598                                 err = tcp_show_sock(h, NULL);
1599                                 if (err < 0)
1600                                         return err;
1601                         }
1602
1603 skip_it:
1604                         h = NLMSG_NEXT(h, status);
1605                 }
1606                 if (msg.msg_flags & MSG_TRUNC) {
1607                         fprintf(stderr, "Message truncated\n");
1608                         continue;
1609                 }
1610                 if (status) {
1611                         fprintf(stderr, "!!!Remnant of size %d\n", status);
1612                         exit(1);
1613                 }
1614         }
1615         return 0;
1616 }
1617
1618 static int tcp_show_netlink_file(struct filter *f)
1619 {
1620         FILE    *fp;
1621         char    buf[8192];
1622
1623         if ((fp = fopen(getenv("TCPDIAG_FILE"), "r")) == NULL) {
1624                 perror("fopen($TCPDIAG_FILE)");
1625                 return -1;
1626         }
1627
1628         while (1) {
1629                 int status, err;
1630                 struct nlmsghdr *h = (struct nlmsghdr*)buf;
1631
1632                 status = fread(buf, 1, sizeof(*h), fp);
1633                 if (status < 0) {
1634                         perror("Reading header from $TCPDIAG_FILE");
1635                         return -1;
1636                 }
1637                 if (status != sizeof(*h)) {
1638                         perror("Unexpected EOF reading $TCPDIAG_FILE");
1639                         return -1;
1640                 }
1641
1642                 status = fread(h+1, 1, NLMSG_ALIGN(h->nlmsg_len-sizeof(*h)), fp);
1643
1644                 if (status < 0) {
1645                         perror("Reading $TCPDIAG_FILE");
1646                         return -1;
1647                 }
1648                 if (status + sizeof(*h) < h->nlmsg_len) {
1649                         perror("Unexpected EOF reading $TCPDIAG_FILE");
1650                         return -1;
1651                 }
1652
1653                 /* The only legal exit point */
1654                 if (h->nlmsg_type == NLMSG_DONE)
1655                         return 0;
1656
1657                 if (h->nlmsg_type == NLMSG_ERROR) {
1658                         struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
1659                         if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
1660                                 fprintf(stderr, "ERROR truncated\n");
1661                         } else {
1662                                 errno = -err->error;
1663                                 perror("TCPDIAG answered");
1664                         }
1665                         return -1;
1666                 }
1667
1668                 err = tcp_show_sock(h, f);
1669                 if (err < 0)
1670                         return err;
1671         }
1672 }
1673
1674 static int tcp_show(struct filter *f, int socktype)
1675 {
1676         FILE *fp = NULL;
1677         char *buf = NULL;
1678         int bufsize = 64*1024;
1679
1680         dg_proto = TCP_PROTO;
1681
1682         if (getenv("TCPDIAG_FILE"))
1683                 return tcp_show_netlink_file(f);
1684
1685         if (!getenv("PROC_NET_TCP") && !getenv("PROC_ROOT")
1686             && tcp_show_netlink(f, NULL, socktype) == 0)
1687                 return 0;
1688
1689         /* Sigh... We have to parse /proc/net/tcp... */
1690
1691
1692         /* Estimate amount of sockets and try to allocate
1693          * huge buffer to read all the table at one read.
1694          * Limit it by 16MB though. The assumption is: as soon as
1695          * kernel was able to hold information about N connections,
1696          * it is able to give us some memory for snapshot.
1697          */
1698         if (1) {
1699                 int guess = slabstat.socks+slabstat.tcp_syns;
1700                 if (f->states&(1<<SS_TIME_WAIT))
1701                         guess += slabstat.tcp_tws;
1702                 if (guess > (16*1024*1024)/128)
1703                         guess = (16*1024*1024)/128;
1704                 guess *= 128;
1705                 if (guess > bufsize)
1706                         bufsize = guess;
1707         }
1708         while (bufsize >= 64*1024) {
1709                 if ((buf = malloc(bufsize)) != NULL)
1710                         break;
1711                 bufsize /= 2;
1712         }
1713         if (buf == NULL) {
1714                 errno = ENOMEM;
1715                 return -1;
1716         }
1717
1718         if (f->families & (1<<AF_INET)) {
1719                 if ((fp = net_tcp_open()) == NULL)
1720                         goto outerr;
1721
1722                 setbuffer(fp, buf, bufsize);
1723                 if (generic_record_read(fp, tcp_show_line, f, AF_INET))
1724                         goto outerr;
1725                 fclose(fp);
1726         }
1727
1728         if ((f->families & (1<<AF_INET6)) &&
1729             (fp = net_tcp6_open()) != NULL) {
1730                 setbuffer(fp, buf, bufsize);
1731                 if (generic_record_read(fp, tcp_show_line, f, AF_INET6))
1732                         goto outerr;
1733                 fclose(fp);
1734         }
1735
1736         free(buf);
1737         return 0;
1738
1739 outerr:
1740         do {
1741                 int saved_errno = errno;
1742                 if (buf)
1743                         free(buf);
1744                 if (fp)
1745                         fclose(fp);
1746                 errno = saved_errno;
1747                 return -1;
1748         } while (0);
1749 }
1750
1751
1752 int dgram_show_line(char *line, const struct filter *f, int family)
1753 {
1754         struct tcpstat s;
1755         char *loc, *rem, *data;
1756         char opt[256];
1757         int n;
1758         char *p;
1759
1760         if ((p = strchr(line, ':')) == NULL)
1761                 return -1;
1762         loc = p+2;
1763
1764         if ((p = strchr(loc, ':')) == NULL)
1765                 return -1;
1766         p[5] = 0;
1767         rem = p+6;
1768
1769         if ((p = strchr(rem, ':')) == NULL)
1770                 return -1;
1771         p[5] = 0;
1772         data = p+6;
1773
1774         do {
1775                 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
1776
1777                 if (!(f->states & (1<<state)))
1778                         return 0;
1779         } while (0);
1780
1781         s.local.family = s.remote.family = family;
1782         if (family == AF_INET) {
1783                 sscanf(loc, "%x:%x", s.local.data, (unsigned*)&s.lport);
1784                 sscanf(rem, "%x:%x", s.remote.data, (unsigned*)&s.rport);
1785                 s.local.bytelen = s.remote.bytelen = 4;
1786         } else {
1787                 sscanf(loc, "%08x%08x%08x%08x:%x",
1788                        s.local.data,
1789                        s.local.data+1,
1790                        s.local.data+2,
1791                        s.local.data+3,
1792                        &s.lport);
1793                 sscanf(rem, "%08x%08x%08x%08x:%x",
1794                        s.remote.data,
1795                        s.remote.data+1,
1796                        s.remote.data+2,
1797                        s.remote.data+3,
1798                        &s.rport);
1799                 s.local.bytelen = s.remote.bytelen = 16;
1800         }
1801
1802         if (f->f && run_ssfilter(f->f, &s) == 0)
1803                 return 0;
1804
1805         opt[0] = 0;
1806         n = sscanf(data, "%x %x:%x %*x:%*x %*x %d %*d %u %d %llx %[^\n]\n",
1807                &s.state, &s.wq, &s.rq,
1808                &s.uid, &s.ino,
1809                &s.refcnt, &s.sk, opt);
1810
1811         if (n < 9)
1812                 opt[0] = 0;
1813
1814         if (netid_width)
1815                 printf("%-*s ", netid_width, dg_proto);
1816         if (state_width)
1817                 printf("%-*s ", state_width, sstate_name[s.state]);
1818
1819         printf("%-6d %-6d ", s.rq, s.wq);
1820
1821         formatted_print(&s.local, s.lport);
1822         formatted_print(&s.remote, s.rport);
1823
1824         if (show_users) {
1825                 char ubuf[4096];
1826                 if (find_users(s.ino, ubuf, sizeof(ubuf)) > 0)
1827                         printf(" users:(%s)", ubuf);
1828         }
1829
1830         if (show_details) {
1831                 if (s.uid)
1832                         printf(" uid=%u", (unsigned)s.uid);
1833                 printf(" ino=%u", s.ino);
1834                 printf(" sk=%llx", s.sk);
1835                 if (opt[0])
1836                         printf(" opt:\"%s\"", opt);
1837         }
1838         printf("\n");
1839
1840         return 0;
1841 }
1842
1843
1844 int udp_show(struct filter *f)
1845 {
1846         FILE *fp = NULL;
1847
1848         dg_proto = UDP_PROTO;
1849
1850         if (f->families&(1<<AF_INET)) {
1851                 if ((fp = net_udp_open()) == NULL)
1852                         goto outerr;
1853                 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
1854                         goto outerr;
1855                 fclose(fp);
1856         }
1857
1858         if ((f->families&(1<<AF_INET6)) &&
1859             (fp = net_udp6_open()) != NULL) {
1860                 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
1861                         goto outerr;
1862                 fclose(fp);
1863         }
1864         return 0;
1865
1866 outerr:
1867         do {
1868                 int saved_errno = errno;
1869                 if (fp)
1870                         fclose(fp);
1871                 errno = saved_errno;
1872                 return -1;
1873         } while (0);
1874 }
1875
1876 int raw_show(struct filter *f)
1877 {
1878         FILE *fp = NULL;
1879
1880         dg_proto = RAW_PROTO;
1881
1882         if (f->families&(1<<AF_INET)) {
1883                 if ((fp = net_raw_open()) == NULL)
1884                         goto outerr;
1885                 if (generic_record_read(fp, dgram_show_line, f, AF_INET))
1886                         goto outerr;
1887                 fclose(fp);
1888         }
1889
1890         if ((f->families&(1<<AF_INET6)) &&
1891             (fp = net_raw6_open()) != NULL) {
1892                 if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
1893                         goto outerr;
1894                 fclose(fp);
1895         }
1896         return 0;
1897
1898 outerr:
1899         do {
1900                 int saved_errno = errno;
1901                 if (fp)
1902                         fclose(fp);
1903                 errno = saved_errno;
1904                 return -1;
1905         } while (0);
1906 }
1907
1908
1909 struct unixstat
1910 {
1911         struct unixstat *next;
1912         int ino;
1913         int peer;
1914         int rq;
1915         int wq;
1916         int state;
1917         int type;
1918         char *name;
1919 };
1920
1921
1922
1923 int unix_state_map[] = { SS_CLOSE, SS_SYN_SENT,
1924                          SS_ESTABLISHED, SS_CLOSING };
1925
1926
1927 #define MAX_UNIX_REMEMBER (1024*1024/sizeof(struct unixstat))
1928
1929 void unix_list_free(struct unixstat *list)
1930 {
1931         while (list) {
1932                 struct unixstat *s = list;
1933                 list = list->next;
1934                 if (s->name)
1935                         free(s->name);
1936                 free(s);
1937         }
1938 }
1939
1940 void unix_list_print(struct unixstat *list, struct filter *f)
1941 {
1942         struct unixstat *s;
1943         char *peer;
1944
1945         for (s = list; s; s = s->next) {
1946                 if (!(f->states & (1<<s->state)))
1947                         continue;
1948                 if (s->type == SOCK_STREAM && !(f->dbs&(1<<UNIX_ST_DB)))
1949                         continue;
1950                 if (s->type == SOCK_DGRAM && !(f->dbs&(1<<UNIX_DG_DB)))
1951                         continue;
1952
1953                 peer = "*";
1954                 if (s->peer) {
1955                         struct unixstat *p;
1956                         for (p = list; p; p = p->next) {
1957                                 if (s->peer == p->ino)
1958                                         break;
1959                         }
1960                         if (!p) {
1961                                 peer = "?";
1962                         } else {
1963                                 peer = p->name ? : "*";
1964                         }
1965                 }
1966
1967                 if (f->f) {
1968                         struct tcpstat tst;
1969                         tst.local.family = AF_UNIX;
1970                         tst.remote.family = AF_UNIX;
1971                         memcpy(tst.local.data, &s->name, sizeof(s->name));
1972                         if (strcmp(peer, "*") == 0)
1973                                 memset(tst.remote.data, 0, sizeof(peer));
1974                         else
1975                                 memcpy(tst.remote.data, &peer, sizeof(peer));
1976                         if (run_ssfilter(f->f, &tst) == 0)
1977                                 continue;
1978                 }
1979
1980                 if (netid_width)
1981                         printf("%-*s ", netid_width,
1982                                s->type == SOCK_STREAM ? "u_str" : "u_dgr");
1983                 if (state_width)
1984                         printf("%-*s ", state_width, sstate_name[s->state]);
1985                 printf("%-6d %-6d ", s->rq, s->wq);
1986                 printf("%*s %-*d %*s %-*d",
1987                        addr_width, s->name ? : "*", serv_width, s->ino,
1988                        addr_width, peer, serv_width, s->peer);
1989                 if (show_users) {
1990                         char ubuf[4096];
1991                         if (find_users(s->ino, ubuf, sizeof(ubuf)) > 0)
1992                                 printf(" users:(%s)", ubuf);
1993                 }
1994                 printf("\n");
1995         }
1996 }
1997
1998 static int unix_show_sock(struct nlmsghdr *nlh, struct filter *f)
1999 {
2000         struct unix_diag_msg *r = NLMSG_DATA(nlh);
2001         struct rtattr *tb[UNIX_DIAG_MAX+1];
2002         char name[128];
2003         int peer_ino;
2004         int rqlen;
2005
2006         parse_rtattr(tb, UNIX_DIAG_MAX, (struct rtattr*)(r+1),
2007                      nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
2008
2009         if (netid_width)
2010                 printf("%-*s ", netid_width,
2011                                 r->udiag_type == SOCK_STREAM ? "u_str" : "u_dgr");
2012         if (state_width)
2013                 printf("%-*s ", state_width, sstate_name[r->udiag_state]);
2014
2015         if (tb[UNIX_DIAG_RQLEN])
2016                 rqlen = *(int *)RTA_DATA(tb[UNIX_DIAG_RQLEN]);
2017         else
2018                 rqlen = 0;
2019
2020         printf("%-6d %-6d ", rqlen, 0);
2021
2022         if (tb[UNIX_DIAG_NAME]) {
2023                 int len = RTA_PAYLOAD(tb[UNIX_DIAG_NAME]);
2024
2025                 memcpy(name, RTA_DATA(tb[UNIX_DIAG_NAME]), len);
2026                 name[len] = '\0';
2027                 if (name[0] == '\0')
2028                         name[0] = '@';
2029         } else
2030                 sprintf(name, "*");
2031
2032         if (tb[UNIX_DIAG_PEER])
2033                 peer_ino = *(int *)RTA_DATA(tb[UNIX_DIAG_PEER]);
2034         else
2035                 peer_ino = 0;
2036
2037         printf("%*s %-*d %*s %-*d",
2038                         addr_width, name,
2039                         serv_width, r->udiag_ino,
2040                         addr_width, "*", /* FIXME */
2041                         serv_width, peer_ino);
2042
2043         if (show_users) {
2044                 char ubuf[4096];
2045                 if (find_users(r->udiag_ino, ubuf, sizeof(ubuf)) > 0)
2046                         printf(" users:(%s)", ubuf);
2047         }
2048
2049         printf("\n");
2050
2051         return 0;
2052 }
2053
2054 static int unix_show_netlink(struct filter *f, FILE *dump_fp)
2055 {
2056         int fd;
2057         struct sockaddr_nl nladdr;
2058         struct {
2059                 struct nlmsghdr nlh;
2060                 struct unix_diag_req r;
2061         } req;
2062         struct msghdr msg;
2063         char    buf[8192];
2064         struct iovec iov[3];
2065
2066         if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG)) < 0)
2067                 return -1;
2068
2069         memset(&nladdr, 0, sizeof(nladdr));
2070         nladdr.nl_family = AF_NETLINK;
2071
2072         req.nlh.nlmsg_len = sizeof(req);
2073         req.nlh.nlmsg_type = SOCK_DIAG_BY_FAMILY;
2074         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
2075         req.nlh.nlmsg_pid = 0;
2076         req.nlh.nlmsg_seq = 123456;
2077         memset(&req.r, 0, sizeof(req.r));
2078         req.r.sdiag_family = AF_UNIX;
2079         req.r.sdiag_protocol = 0; /* ignored */
2080         req.r.udiag_states = f->states;
2081         req.r.udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER | UDIAG_SHOW_RQLEN;
2082
2083         iov[0] = (struct iovec){
2084                 .iov_base = &req,
2085                 .iov_len = sizeof(req)
2086         };
2087
2088         msg = (struct msghdr) {
2089                 .msg_name = (void*)&nladdr,
2090                 .msg_namelen = sizeof(nladdr),
2091                 .msg_iov = iov,
2092                 .msg_iovlen = f->f ? 3 : 1,
2093         };
2094
2095         if (sendmsg(fd, &msg, 0) < 0) {
2096                 close(fd);
2097                 return -1;
2098         }
2099
2100         iov[0] = (struct iovec){
2101                 .iov_base = buf,
2102                 .iov_len = sizeof(buf)
2103         };
2104
2105         while (1) {
2106                 int status;
2107                 struct nlmsghdr *h;
2108
2109                 msg = (struct msghdr) {
2110                         (void*)&nladdr, sizeof(nladdr),
2111                         iov,    1,
2112                         NULL,   0,
2113                         0
2114                 };
2115
2116                 status = recvmsg(fd, &msg, 0);
2117
2118                 if (status < 0) {
2119                         if (errno == EINTR)
2120                                 continue;
2121                         perror("OVERRUN");
2122                         continue;
2123                 }
2124                 if (status == 0) {
2125                         fprintf(stderr, "EOF on netlink\n");
2126                         close(fd);
2127                         return 0;
2128                 }
2129
2130                 if (dump_fp)
2131                         fwrite(buf, 1, NLMSG_ALIGN(status), dump_fp);
2132
2133                 h = (struct nlmsghdr*)buf;
2134                 while (NLMSG_OK(h, status)) {
2135                         int err;
2136
2137                         if (/*h->nlmsg_pid != rth->local.nl_pid ||*/
2138                             h->nlmsg_seq != 123456)
2139                                 goto skip_it;
2140
2141                         if (h->nlmsg_type == NLMSG_DONE) {
2142                                 close(fd);
2143                                 return 0;
2144                         }
2145                         if (h->nlmsg_type == NLMSG_ERROR) {
2146                                 struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
2147                                 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
2148                                         fprintf(stderr, "ERROR truncated\n");
2149                                 } else {
2150                                         errno = -err->error;
2151                                         if (errno != ENOENT)
2152                                                 fprintf(stderr, "UDIAG answers %d\n", errno);
2153                                 }
2154                                 close(fd);
2155                                 return -1;
2156                         }
2157                         if (!dump_fp) {
2158                                 err = unix_show_sock(h, f);
2159                                 if (err < 0) {
2160                                         close(fd);
2161                                         return err;
2162                                 }
2163                         }
2164
2165 skip_it:
2166                         h = NLMSG_NEXT(h, status);
2167                 }
2168                 if (msg.msg_flags & MSG_TRUNC) {
2169                         fprintf(stderr, "Message truncated\n");
2170                         continue;
2171                 }
2172                 if (status) {
2173                         fprintf(stderr, "!!!Remnant of size %d\n", status);
2174                         exit(1);
2175                 }
2176         }
2177         close(fd);
2178         return 0;
2179 }
2180
2181 int unix_show(struct filter *f)
2182 {
2183         FILE *fp;
2184         char buf[256];
2185         char name[128];
2186         int  newformat = 0;
2187         int  cnt;
2188         struct unixstat *list = NULL;
2189
2190         if (!getenv("PROC_NET_UNIX") && !getenv("PROC_ROOT")
2191             && unix_show_netlink(f, NULL) == 0)
2192                 return 0;
2193
2194         if ((fp = net_unix_open()) == NULL)
2195                 return -1;
2196         fgets(buf, sizeof(buf)-1, fp);
2197
2198         if (memcmp(buf, "Peer", 4) == 0)
2199                 newformat = 1;
2200         cnt = 0;
2201
2202         while (fgets(buf, sizeof(buf)-1, fp)) {
2203                 struct unixstat *u, **insp;
2204                 int flags;
2205
2206                 if (!(u = malloc(sizeof(*u))))
2207                         break;
2208                 u->name = NULL;
2209
2210                 if (sscanf(buf, "%x: %x %x %x %x %x %d %s",
2211                            &u->peer, &u->rq, &u->wq, &flags, &u->type,
2212                            &u->state, &u->ino, name) < 8)
2213                         name[0] = 0;
2214
2215                 if (flags&(1<<16)) {
2216                         u->state = SS_LISTEN;
2217                 } else {
2218                         u->state = unix_state_map[u->state-1];
2219                         if (u->type == SOCK_DGRAM &&
2220                             u->state == SS_CLOSE &&
2221                             u->peer)
2222                                 u->state = SS_ESTABLISHED;
2223                 }
2224
2225                 if (!newformat) {
2226                         u->peer = 0;
2227                         u->rq = 0;
2228                         u->wq = 0;
2229                 }
2230
2231                 insp = &list;
2232                 while (*insp) {
2233                         if (u->type < (*insp)->type ||
2234                             (u->type == (*insp)->type &&
2235                              u->ino < (*insp)->ino))
2236                                 break;
2237                         insp = &(*insp)->next;
2238                 }
2239                 u->next = *insp;
2240                 *insp = u;
2241
2242                 if (name[0]) {
2243                         if ((u->name = malloc(strlen(name)+1)) == NULL)
2244                                 break;
2245                         strcpy(u->name, name);
2246                 }
2247                 if (++cnt > MAX_UNIX_REMEMBER) {
2248                         unix_list_print(list, f);
2249                         unix_list_free(list);
2250                         list = NULL;
2251                         cnt = 0;
2252                 }
2253         }
2254         fclose(fp);
2255         if (list) {
2256                 unix_list_print(list, f);
2257                 unix_list_free(list);
2258                 list = NULL;
2259                 cnt = 0;
2260         }
2261
2262         return 0;
2263 }
2264
2265
2266 int packet_show(struct filter *f)
2267 {
2268         FILE *fp;
2269         char buf[256];
2270         int type;
2271         int prot;
2272         int iface;
2273         int state;
2274         int rq;
2275         int uid;
2276         int ino;
2277         unsigned long long sk;
2278
2279         if (!(f->states & (1<<SS_CLOSE)))
2280                 return 0;
2281
2282         if ((fp = net_packet_open()) == NULL)
2283                 return -1;
2284         fgets(buf, sizeof(buf)-1, fp);
2285
2286         while (fgets(buf, sizeof(buf)-1, fp)) {
2287                 sscanf(buf, "%llx %*d %d %x %d %d %u %u %u",
2288                        &sk,
2289                        &type, &prot, &iface, &state,
2290                        &rq, &uid, &ino);
2291
2292                 if (type == SOCK_RAW && !(f->dbs&(1<<PACKET_R_DB)))
2293                         continue;
2294                 if (type == SOCK_DGRAM && !(f->dbs&(1<<PACKET_DG_DB)))
2295                         continue;
2296                 if (f->f) {
2297                         struct tcpstat tst;
2298                         tst.local.family = AF_PACKET;
2299                         tst.remote.family = AF_PACKET;
2300                         tst.rport = 0;
2301                         tst.lport = iface;
2302                         tst.local.data[0] = prot;
2303                         tst.remote.data[0] = 0;
2304                         if (run_ssfilter(f->f, &tst) == 0)
2305                                 continue;
2306                 }
2307
2308                 if (netid_width)
2309                         printf("%-*s ", netid_width,
2310                                type == SOCK_RAW ? "p_raw" : "p_dgr");
2311                 if (state_width)
2312                         printf("%-*s ", state_width, "UNCONN");
2313                 printf("%-6d %-6d ", rq, 0);
2314                 if (prot == 3) {
2315                         printf("%*s:", addr_width, "*");
2316                 } else {
2317                         char tb[16];
2318                         printf("%*s:", addr_width,
2319                                ll_proto_n2a(htons(prot), tb, sizeof(tb)));
2320                 }
2321                 if (iface == 0) {
2322                         printf("%-*s ", serv_width, "*");
2323                 } else {
2324                         printf("%-*s ", serv_width, xll_index_to_name(iface));
2325                 }
2326                 printf("%*s*%-*s",
2327                        addr_width, "", serv_width, "");
2328
2329                 if (show_users) {
2330                         char ubuf[4096];
2331                         if (find_users(ino, ubuf, sizeof(ubuf)) > 0)
2332                                 printf(" users:(%s)", ubuf);
2333                 }
2334                 if (show_details) {
2335                         printf(" ino=%u uid=%u sk=%llx", ino, uid, sk);
2336                 }
2337                 printf("\n");
2338         }
2339
2340         return 0;
2341 }
2342
2343 int netlink_show(struct filter *f)
2344 {
2345         FILE *fp;
2346         char buf[256];
2347         int prot, pid;
2348         unsigned groups;
2349         int rq, wq, rc;
2350         unsigned long long sk, cb;
2351
2352         if (!(f->states & (1<<SS_CLOSE)))
2353                 return 0;
2354
2355         if ((fp = net_netlink_open()) == NULL)
2356                 return -1;
2357         fgets(buf, sizeof(buf)-1, fp);
2358
2359         while (fgets(buf, sizeof(buf)-1, fp)) {
2360                 sscanf(buf, "%llx %d %d %x %d %d %llx %d",
2361                        &sk,
2362                        &prot, &pid, &groups, &rq, &wq, &cb, &rc);
2363
2364                 if (f->f) {
2365                         struct tcpstat tst;
2366                         tst.local.family = AF_NETLINK;
2367                         tst.remote.family = AF_NETLINK;
2368                         tst.rport = -1;
2369                         tst.lport = pid;
2370                         tst.local.data[0] = prot;
2371                         tst.remote.data[0] = 0;
2372                         if (run_ssfilter(f->f, &tst) == 0)
2373                                 continue;
2374                 }
2375
2376                 if (netid_width)
2377                         printf("%-*s ", netid_width, "nl");
2378                 if (state_width)
2379                         printf("%-*s ", state_width, "UNCONN");
2380                 printf("%-6d %-6d ", rq, wq);
2381                 if (resolve_services && prot == 0)
2382                         printf("%*s:", addr_width, "rtnl");
2383                 else if (resolve_services && prot == 3)
2384                         printf("%*s:", addr_width, "fw");
2385                 else if (resolve_services && prot == 4)
2386                         printf("%*s:", addr_width, "tcpdiag");
2387                 else
2388                         printf("%*d:", addr_width, prot);
2389                 if (pid == -1) {
2390                         printf("%-*s ", serv_width, "*");
2391                 } else if (resolve_services) {
2392                         int done = 0;
2393                         if (!pid) {
2394                                 done = 1;
2395                                 printf("%-*s ", serv_width, "kernel");
2396                         } else if (pid > 0) {
2397                                 char procname[64];
2398                                 FILE *fp;
2399                                 sprintf(procname, "%s/%d/stat",
2400                                         getenv("PROC_ROOT") ? : "/proc", pid);
2401                                 if ((fp = fopen(procname, "r")) != NULL) {
2402                                         if (fscanf(fp, "%*d (%[^)])", procname) == 1) {
2403                                                 sprintf(procname+strlen(procname), "/%d", pid);
2404                                                 printf("%-*s ", serv_width, procname);
2405                                                 done = 1;
2406                                         }
2407                                         fclose(fp);
2408                                 }
2409                         }
2410                         if (!done)
2411                                 printf("%-*d ", serv_width, pid);
2412                 } else {
2413                         printf("%-*d ", serv_width, pid);
2414                 }
2415                 printf("%*s*%-*s",
2416                        addr_width, "", serv_width, "");
2417
2418                 if (show_details) {
2419                         printf(" sk=%llx cb=%llx groups=0x%08x", sk, cb, groups);
2420                 }
2421                 printf("\n");
2422         }
2423
2424         return 0;
2425 }
2426
2427 struct snmpstat
2428 {
2429         int tcp_estab;
2430 };
2431
2432 int get_snmp_int(char *proto, char *key, int *result)
2433 {
2434         char buf[1024];
2435         FILE *fp;
2436         int protolen = strlen(proto);
2437         int keylen = strlen(key);
2438
2439         *result = 0;
2440
2441         if ((fp = net_snmp_open()) == NULL)
2442                 return -1;
2443
2444         while (fgets(buf, sizeof(buf), fp) != NULL) {
2445                 char *p = buf;
2446                 int  pos = 0;
2447                 if (memcmp(buf, proto, protolen))
2448                         continue;
2449                 while ((p = strchr(p, ' ')) != NULL) {
2450                         pos++;
2451                         p++;
2452                         if (memcmp(p, key, keylen) == 0 &&
2453                             (p[keylen] == ' ' || p[keylen] == '\n'))
2454                                 break;
2455                 }
2456                 if (fgets(buf, sizeof(buf), fp) == NULL)
2457                         break;
2458                 if (memcmp(buf, proto, protolen))
2459                         break;
2460                 p = buf;
2461                 while ((p = strchr(p, ' ')) != NULL) {
2462                         p++;
2463                         if (--pos == 0) {
2464                                 sscanf(p, "%d", result);
2465                                 fclose(fp);
2466                                 return 0;
2467                         }
2468                 }
2469         }
2470
2471         fclose(fp);
2472         errno = ESRCH;
2473         return -1;
2474 }
2475
2476
2477 /* Get stats from sockstat */
2478
2479 struct sockstat
2480 {
2481         int socks;
2482         int tcp_mem;
2483         int tcp_total;
2484         int tcp_orphans;
2485         int tcp_tws;
2486         int tcp4_hashed;
2487         int udp4;
2488         int raw4;
2489         int frag4;
2490         int frag4_mem;
2491         int tcp6_hashed;
2492         int udp6;
2493         int raw6;
2494         int frag6;
2495         int frag6_mem;
2496 };
2497
2498 static void get_sockstat_line(char *line, struct sockstat *s)
2499 {
2500         char id[256], rem[256];
2501
2502         if (sscanf(line, "%[^ ] %[^\n]\n", id, rem) != 2)
2503                 return;
2504
2505         if (strcmp(id, "sockets:") == 0)
2506                 sscanf(rem, "%*s%d", &s->socks);
2507         else if (strcmp(id, "UDP:") == 0)
2508                 sscanf(rem, "%*s%d", &s->udp4);
2509         else if (strcmp(id, "UDP6:") == 0)
2510                 sscanf(rem, "%*s%d", &s->udp6);
2511         else if (strcmp(id, "RAW:") == 0)
2512                 sscanf(rem, "%*s%d", &s->raw4);
2513         else if (strcmp(id, "RAW6:") == 0)
2514                 sscanf(rem, "%*s%d", &s->raw6);
2515         else if (strcmp(id, "TCP6:") == 0)
2516                 sscanf(rem, "%*s%d", &s->tcp6_hashed);
2517         else if (strcmp(id, "FRAG:") == 0)
2518                 sscanf(rem, "%*s%d%*s%d", &s->frag4, &s->frag4_mem);
2519         else if (strcmp(id, "FRAG6:") == 0)
2520                 sscanf(rem, "%*s%d%*s%d", &s->frag6, &s->frag6_mem);
2521         else if (strcmp(id, "TCP:") == 0)
2522                 sscanf(rem, "%*s%d%*s%d%*s%d%*s%d%*s%d",
2523                        &s->tcp4_hashed,
2524                        &s->tcp_orphans, &s->tcp_tws, &s->tcp_total, &s->tcp_mem);
2525 }
2526
2527 int get_sockstat(struct sockstat *s)
2528 {
2529         char buf[256];
2530         FILE *fp;
2531
2532         memset(s, 0, sizeof(*s));
2533
2534         if ((fp = net_sockstat_open()) == NULL)
2535                 return -1;
2536         while(fgets(buf, sizeof(buf), fp) != NULL)
2537                 get_sockstat_line(buf, s);
2538         fclose(fp);
2539
2540         if ((fp = net_sockstat6_open()) == NULL)
2541                 return 0;
2542         while(fgets(buf, sizeof(buf), fp) != NULL)
2543                 get_sockstat_line(buf, s);
2544         fclose(fp);
2545
2546         return 0;
2547 }
2548
2549 int print_summary(void)
2550 {
2551         struct sockstat s;
2552         struct snmpstat sn;
2553
2554         if (get_sockstat(&s) < 0)
2555                 perror("ss: get_sockstat");
2556         if (get_snmp_int("Tcp:", "CurrEstab", &sn.tcp_estab) < 0)
2557                 perror("ss: get_snmpstat");
2558
2559         printf("Total: %d (kernel %d)\n", s.socks, slabstat.socks);
2560
2561         printf("TCP:   %d (estab %d, closed %d, orphaned %d, synrecv %d, timewait %d/%d), ports %d\n",
2562                s.tcp_total + slabstat.tcp_syns + s.tcp_tws,
2563                sn.tcp_estab,
2564                s.tcp_total - (s.tcp4_hashed+s.tcp6_hashed-s.tcp_tws),
2565                s.tcp_orphans,
2566                slabstat.tcp_syns,
2567                s.tcp_tws, slabstat.tcp_tws,
2568                slabstat.tcp_ports
2569                );
2570
2571         printf("\n");
2572         printf("Transport Total     IP        IPv6\n");
2573         printf("*         %-9d %-9s %-9s\n", slabstat.socks, "-", "-");
2574         printf("RAW       %-9d %-9d %-9d\n", s.raw4+s.raw6, s.raw4, s.raw6);
2575         printf("UDP       %-9d %-9d %-9d\n", s.udp4+s.udp6, s.udp4, s.udp6);
2576         printf("TCP       %-9d %-9d %-9d\n", s.tcp4_hashed+s.tcp6_hashed, s.tcp4_hashed, s.tcp6_hashed);
2577         printf("INET      %-9d %-9d %-9d\n",
2578                s.raw4+s.udp4+s.tcp4_hashed+
2579                s.raw6+s.udp6+s.tcp6_hashed,
2580                s.raw4+s.udp4+s.tcp4_hashed,
2581                s.raw6+s.udp6+s.tcp6_hashed);
2582         printf("FRAG      %-9d %-9d %-9d\n", s.frag4+s.frag6, s.frag4, s.frag6);
2583
2584         printf("\n");
2585
2586         return 0;
2587 }
2588
2589 static void _usage(FILE *dest)
2590 {
2591         fprintf(dest,
2592 "Usage: ss [ OPTIONS ]\n"
2593 "       ss [ OPTIONS ] [ FILTER ]\n"
2594 "   -h, --help          this message\n"
2595 "   -V, --version       output version information\n"
2596 "   -n, --numeric       don't resolve service names\n"
2597 "   -r, --resolve       resolve host names\n"
2598 "   -a, --all           display all sockets\n"
2599 "   -l, --listening     display listening sockets\n"
2600 "   -o, --options       show timer information\n"
2601 "   -e, --extended      show detailed socket information\n"
2602 "   -m, --memory        show socket memory usage\n"
2603 "   -p, --processes     show process using socket\n"
2604 "   -i, --info          show internal TCP information\n"
2605 "   -s, --summary       show socket usage summary\n"
2606 "\n"
2607 "   -4, --ipv4          display only IP version 4 sockets\n"
2608 "   -6, --ipv6          display only IP version 6 sockets\n"
2609 "   -0, --packet        display PACKET sockets\n"
2610 "   -t, --tcp           display only TCP sockets\n"
2611 "   -u, --udp           display only UDP sockets\n"
2612 "   -d, --dccp          display only DCCP sockets\n"
2613 "   -w, --raw           display only RAW sockets\n"
2614 "   -x, --unix          display only Unix domain sockets\n"
2615 "   -f, --family=FAMILY display sockets of type FAMILY\n"
2616 "\n"
2617 "   -A, --query=QUERY, --socket=QUERY\n"
2618 "       QUERY := {all|inet|tcp|udp|raw|unix|packet|netlink}[,QUERY]\n"
2619 "\n"
2620 "   -D, --diag=FILE     Dump raw information about TCP sockets to FILE\n"
2621 "   -F, --filter=FILE   read filter information from FILE\n"
2622 "       FILTER := [ state TCP-STATE ] [ EXPRESSION ]\n"
2623                 );
2624 }
2625
2626 static void help(void) __attribute__((noreturn));
2627 static void help(void)
2628 {
2629         _usage(stdout);
2630         exit(0);
2631 }
2632
2633 static void usage(void) __attribute__((noreturn));
2634 static void usage(void)
2635 {
2636         _usage(stderr);
2637         exit(-1);
2638 }
2639
2640
2641 int scan_state(const char *state)
2642 {
2643         int i;
2644         if (strcasecmp(state, "close") == 0 ||
2645             strcasecmp(state, "closed") == 0)
2646                 return (1<<SS_CLOSE);
2647         if (strcasecmp(state, "syn-rcv") == 0)
2648                 return (1<<SS_SYN_RECV);
2649         if (strcasecmp(state, "established") == 0)
2650                 return (1<<SS_ESTABLISHED);
2651         if (strcasecmp(state, "all") == 0)
2652                 return SS_ALL;
2653         if (strcasecmp(state, "connected") == 0)
2654                 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN));
2655         if (strcasecmp(state, "synchronized") == 0)
2656                 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN)|(1<<SS_SYN_SENT));
2657         if (strcasecmp(state, "bucket") == 0)
2658                 return (1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT);
2659         if (strcasecmp(state, "big") == 0)
2660                 return SS_ALL & ~((1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT));
2661         for (i=0; i<SS_MAX; i++) {
2662                 if (strcasecmp(state, sstate_namel[i]) == 0)
2663                         return (1<<i);
2664         }
2665         return 0;
2666 }
2667
2668 static const struct option long_opts[] = {
2669         { "numeric", 0, 0, 'n' },
2670         { "resolve", 0, 0, 'r' },
2671         { "options", 0, 0, 'o' },
2672         { "extended", 0, 0, 'e' },
2673         { "memory", 0, 0, 'm' },
2674         { "info", 0, 0, 'i' },
2675         { "processes", 0, 0, 'p' },
2676         { "dccp", 0, 0, 'd' },
2677         { "tcp", 0, 0, 't' },
2678         { "udp", 0, 0, 'u' },
2679         { "raw", 0, 0, 'w' },
2680         { "unix", 0, 0, 'x' },
2681         { "all", 0, 0, 'a' },
2682         { "listening", 0, 0, 'l' },
2683         { "ipv4", 0, 0, '4' },
2684         { "ipv6", 0, 0, '6' },
2685         { "packet", 0, 0, '0' },
2686         { "family", 1, 0, 'f' },
2687         { "socket", 1, 0, 'A' },
2688         { "query", 1, 0, 'A' },
2689         { "summary", 0, 0, 's' },
2690         { "diag", 1, 0, 'D' },
2691         { "filter", 1, 0, 'F' },
2692         { "version", 0, 0, 'V' },
2693         { "help", 0, 0, 'h' },
2694         { 0 }
2695
2696 };
2697
2698 int main(int argc, char *argv[])
2699 {
2700         int do_default = 1;
2701         int saw_states = 0;
2702         int saw_query = 0;
2703         int do_summary = 0;
2704         const char *dump_tcpdiag = NULL;
2705         FILE *filter_fp = NULL;
2706         int ch;
2707
2708         memset(&current_filter, 0, sizeof(current_filter));
2709
2710         current_filter.states = default_filter.states;
2711
2712         while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spf:miA:D:F:vV",
2713                                  long_opts, NULL)) != EOF) {
2714                 switch(ch) {
2715                 case 'n':
2716                         resolve_services = 0;
2717                         break;
2718                 case 'r':
2719                         resolve_hosts = 1;
2720                         break;
2721                 case 'o':
2722                         show_options = 1;
2723                         break;
2724                 case 'e':
2725                         show_options = 1;
2726                         show_details++;
2727                         break;
2728                 case 'm':
2729                         show_mem = 1;
2730                         break;
2731                 case 'i':
2732                         show_tcpinfo = 1;
2733                         break;
2734                 case 'p':
2735                         show_users++;
2736                         user_ent_hash_build();
2737                         break;
2738                 case 'd':
2739                         current_filter.dbs |= (1<<DCCP_DB);
2740                         do_default = 0;
2741                         break;
2742                 case 't':
2743                         current_filter.dbs |= (1<<TCP_DB);
2744                         do_default = 0;
2745                         break;
2746                 case 'u':
2747                         current_filter.dbs |= (1<<UDP_DB);
2748                         do_default = 0;
2749                         break;
2750                 case 'w':
2751                         current_filter.dbs |= (1<<RAW_DB);
2752                         do_default = 0;
2753                         break;
2754                 case 'x':
2755                         current_filter.dbs |= UNIX_DBM;
2756                         do_default = 0;
2757                         break;
2758                 case 'a':
2759                         current_filter.states = SS_ALL;
2760                         break;
2761                 case 'l':
2762                         current_filter.states = (1<<SS_LISTEN) | (1<<SS_CLOSE);
2763                         break;
2764                 case '4':
2765                         preferred_family = AF_INET;
2766                         break;
2767                 case '6':
2768                         preferred_family = AF_INET6;
2769                         break;
2770                 case '0':
2771                         preferred_family = AF_PACKET;
2772                         break;
2773                 case 'f':
2774                         if (strcmp(optarg, "inet") == 0)
2775                                 preferred_family = AF_INET;
2776                         else if (strcmp(optarg, "inet6") == 0)
2777                                 preferred_family = AF_INET6;
2778                         else if (strcmp(optarg, "link") == 0)
2779                                 preferred_family = AF_PACKET;
2780                         else if (strcmp(optarg, "unix") == 0)
2781                                 preferred_family = AF_UNIX;
2782                         else if (strcmp(optarg, "netlink") == 0)
2783                                 preferred_family = AF_NETLINK;
2784                         else if (strcmp(optarg, "help") == 0)
2785                                 help();
2786                         else {
2787                                 fprintf(stderr, "ss: \"%s\" is invalid family\n", optarg);
2788                                 usage();
2789                         }
2790                         break;
2791                 case 'A':
2792                 {
2793                         char *p, *p1;
2794                         if (!saw_query) {
2795                                 current_filter.dbs = 0;
2796                                 saw_query = 1;
2797                                 do_default = 0;
2798                         }
2799                         p = p1 = optarg;
2800                         do {
2801                                 if ((p1 = strchr(p, ',')) != NULL)
2802                                         *p1 = 0;
2803                                 if (strcmp(p, "all") == 0) {
2804                                         current_filter.dbs = ALL_DB;
2805                                 } else if (strcmp(p, "inet") == 0) {
2806                                         current_filter.dbs |= (1<<TCP_DB)|(1<<DCCP_DB)|(1<<UDP_DB)|(1<<RAW_DB);
2807                                 } else if (strcmp(p, "udp") == 0) {
2808                                         current_filter.dbs |= (1<<UDP_DB);
2809                                 } else if (strcmp(p, "dccp") == 0) {
2810                                         current_filter.dbs |= (1<<DCCP_DB);
2811                                 } else if (strcmp(p, "tcp") == 0) {
2812                                         current_filter.dbs |= (1<<TCP_DB);
2813                                 } else if (strcmp(p, "raw") == 0) {
2814                                         current_filter.dbs |= (1<<RAW_DB);
2815                                 } else if (strcmp(p, "unix") == 0) {
2816                                         current_filter.dbs |= UNIX_DBM;
2817                                 } else if (strcasecmp(p, "unix_stream") == 0 ||
2818                                            strcmp(p, "u_str") == 0) {
2819                                         current_filter.dbs |= (1<<UNIX_ST_DB);
2820                                 } else if (strcasecmp(p, "unix_dgram") == 0 ||
2821                                            strcmp(p, "u_dgr") == 0) {
2822                                         current_filter.dbs |= (1<<UNIX_DG_DB);
2823                                 } else if (strcmp(p, "packet") == 0) {
2824                                         current_filter.dbs |= PACKET_DBM;
2825                                 } else if (strcmp(p, "packet_raw") == 0 ||
2826                                            strcmp(p, "p_raw") == 0) {
2827                                         current_filter.dbs |= (1<<PACKET_R_DB);
2828                                 } else if (strcmp(p, "packet_dgram") == 0 ||
2829                                            strcmp(p, "p_dgr") == 0) {
2830                                         current_filter.dbs |= (1<<PACKET_DG_DB);
2831                                 } else if (strcmp(p, "netlink") == 0) {
2832                                         current_filter.dbs |= (1<<NETLINK_DB);
2833                                 } else {
2834                                         fprintf(stderr, "ss: \"%s\" is illegal socket table id\n", p);
2835                                         usage();
2836                                 }
2837                                 p = p1 + 1;
2838                         } while (p1);
2839                         break;
2840                 }
2841                 case 's':
2842                         do_summary = 1;
2843                         break;
2844                 case 'D':
2845                         dump_tcpdiag = optarg;
2846                         break;
2847                 case 'F':
2848                         if (filter_fp) {
2849                                 fprintf(stderr, "More than one filter file\n");
2850                                 exit(-1);
2851                         }
2852                         if (optarg[0] == '-')
2853                                 filter_fp = stdin;
2854                         else
2855                                 filter_fp = fopen(optarg, "r");
2856                         if (!filter_fp) {
2857                                 perror("fopen filter file");
2858                                 exit(-1);
2859                         }
2860                         break;
2861                 case 'v':
2862                 case 'V':
2863                         printf("ss utility, iproute2-ss%s\n", SNAPSHOT);
2864                         exit(0);
2865                 case 'h':
2866                 case '?':
2867                         help();
2868                 default:
2869                         usage();
2870                 }
2871         }
2872
2873         argc -= optind;
2874         argv += optind;
2875
2876         get_slabstat(&slabstat);
2877
2878         if (do_summary) {
2879                 print_summary();
2880                 if (do_default && argc == 0)
2881                         exit(0);
2882         }
2883
2884         if (do_default)
2885                 current_filter.dbs = default_filter.dbs;
2886
2887         if (preferred_family == AF_UNSPEC) {
2888                 if (!(current_filter.dbs&~UNIX_DBM))
2889                         preferred_family = AF_UNIX;
2890                 else if (!(current_filter.dbs&~PACKET_DBM))
2891                         preferred_family = AF_PACKET;
2892                 else if (!(current_filter.dbs&~(1<<NETLINK_DB)))
2893                         preferred_family = AF_NETLINK;
2894         }
2895
2896         if (preferred_family != AF_UNSPEC) {
2897                 int mask2;
2898                 if (preferred_family == AF_INET ||
2899                     preferred_family == AF_INET6) {
2900                         mask2= current_filter.dbs;
2901                 } else if (preferred_family == AF_PACKET) {
2902                         mask2 = PACKET_DBM;
2903                 } else if (preferred_family == AF_UNIX) {
2904                         mask2 = UNIX_DBM;
2905                 } else if (preferred_family == AF_NETLINK) {
2906                         mask2 = (1<<NETLINK_DB);
2907                 } else {
2908                         mask2 = 0;
2909                 }
2910
2911                 if (do_default)
2912                         current_filter.dbs = mask2;
2913                 else
2914                         current_filter.dbs &= mask2;
2915                 current_filter.families = (1<<preferred_family);
2916         } else {
2917                 if (!do_default)
2918                         current_filter.families = ~0;
2919                 else
2920                         current_filter.families = default_filter.families;
2921         }
2922         if (current_filter.dbs == 0) {
2923                 fprintf(stderr, "ss: no socket tables to show with such filter.\n");
2924                 exit(0);
2925         }
2926         if (current_filter.families == 0) {
2927                 fprintf(stderr, "ss: no families to show with such filter.\n");
2928                 exit(0);
2929         }
2930
2931         if (resolve_services && resolve_hosts &&
2932             (current_filter.dbs&(UNIX_DBM|(1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB))))
2933                 init_service_resolver();
2934
2935         /* Now parse filter... */
2936         if (argc == 0 && filter_fp) {
2937                 if (ssfilter_parse(&current_filter.f, 0, NULL, filter_fp))
2938                         usage();
2939         }
2940
2941         while (argc > 0) {
2942                 if (strcmp(*argv, "state") == 0) {
2943                         NEXT_ARG();
2944                         if (!saw_states)
2945                                 current_filter.states = 0;
2946                         current_filter.states |= scan_state(*argv);
2947                         saw_states = 1;
2948                 } else if (strcmp(*argv, "exclude") == 0 ||
2949                            strcmp(*argv, "excl") == 0) {
2950                         NEXT_ARG();
2951                         if (!saw_states)
2952                                 current_filter.states = SS_ALL;
2953                         current_filter.states &= ~scan_state(*argv);
2954                         saw_states = 1;
2955                 } else {
2956                         if (ssfilter_parse(&current_filter.f, argc, argv, filter_fp))
2957                                 usage();
2958                         break;
2959                 }
2960                 argc--; argv++;
2961         }
2962
2963         if (current_filter.states == 0) {
2964                 fprintf(stderr, "ss: no socket states to show with such filter.\n");
2965                 exit(0);
2966         }
2967
2968         if (dump_tcpdiag) {
2969                 FILE *dump_fp = stdout;
2970                 if (!(current_filter.dbs & (1<<TCP_DB))) {
2971                         fprintf(stderr, "ss: tcpdiag dump requested and no tcp in filter.\n");
2972                         exit(0);
2973                 }
2974                 if (dump_tcpdiag[0] != '-') {
2975                         dump_fp = fopen(dump_tcpdiag, "w");
2976                         if (!dump_tcpdiag) {
2977                                 perror("fopen dump file");
2978                                 exit(-1);
2979                         }
2980                 }
2981                 tcp_show_netlink(&current_filter, dump_fp, TCPDIAG_GETSOCK);
2982                 fflush(dump_fp);
2983                 exit(0);
2984         }
2985
2986         netid_width = 0;
2987         if (current_filter.dbs&(current_filter.dbs-1))
2988                 netid_width = 5;
2989
2990         state_width = 0;
2991         if (current_filter.states&(current_filter.states-1))
2992                 state_width = 10;
2993
2994         screen_width = 80;
2995         if (isatty(STDOUT_FILENO)) {
2996                 struct winsize w;
2997
2998                 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
2999                         if (w.ws_col > 0)
3000                                 screen_width = w.ws_col;
3001                 }
3002         }
3003
3004         addrp_width = screen_width;
3005         addrp_width -= netid_width+1;
3006         addrp_width -= state_width+1;
3007         addrp_width -= 14;
3008
3009         if (addrp_width&1) {
3010                 if (netid_width)
3011                         netid_width++;
3012                 else if (state_width)
3013                         state_width++;
3014         }
3015
3016         addrp_width /= 2;
3017         addrp_width--;
3018
3019         serv_width = resolve_services ? 7 : 5;
3020
3021         if (addrp_width < 15+serv_width+1)
3022                 addrp_width = 15+serv_width+1;
3023
3024         addr_width = addrp_width - serv_width - 1;
3025
3026         if (netid_width)
3027                 printf("%-*s ", netid_width, "Netid");
3028         if (state_width)
3029                 printf("%-*s ", state_width, "State");
3030         printf("%-6s %-6s ", "Recv-Q", "Send-Q");
3031
3032         printf("%*s:%-*s %*s:%-*s\n",
3033                addr_width, "Local Address", serv_width, "Port",
3034                addr_width, "Peer Address", serv_width, "Port");
3035
3036         fflush(stdout);
3037
3038         if (current_filter.dbs & (1<<NETLINK_DB))
3039                 netlink_show(&current_filter);
3040         if (current_filter.dbs & PACKET_DBM)
3041                 packet_show(&current_filter);
3042         if (current_filter.dbs & UNIX_DBM)
3043                 unix_show(&current_filter);
3044         if (current_filter.dbs & (1<<RAW_DB))
3045                 raw_show(&current_filter);
3046         if (current_filter.dbs & (1<<UDP_DB))
3047                 udp_show(&current_filter);
3048         if (current_filter.dbs & (1<<TCP_DB))
3049                 tcp_show(&current_filter, TCPDIAG_GETSOCK);
3050         if (current_filter.dbs & (1<<DCCP_DB))
3051                 tcp_show(&current_filter, DCCPDIAG_GETSOCK);
3052         return 0;
3053 }