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