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