source: trunk/src/sh_port2proc.c@ 236

Last change on this file since 236 was 235, checked in by katerina, 15 years ago

Fix for potential deadlock when calling external programm (ticket #155).
File size: 23.6 KB
RevLine 
[180]1/* SAMHAIN file system integrity testing */
2/* Copyright (C) 2008 Rainer Wichmann */
3/* */
4/* This program is free software; you can redistribute it */
5/* and/or modify */
6/* it under the terms of the GNU General Public License as */
7/* published by */
8/* the Free Software Foundation; either version 2 of the License, or */
9/* (at your option) any later version. */
10/* */
11/* This program is distributed in the hope that it will be useful, */
12/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
14/* GNU General Public License for more details. */
15/* */
16/* You should have received a copy of the GNU General Public License */
17/* along with this program; if not, write to the Free Software */
18/* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "config_xor.h"
21
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/types.h>
26#include <unistd.h>
27
28#ifdef HAVE_DIRENT_H
29#include <dirent.h>
30#define NAMLEN(dirent) sl_strlen((dirent)->d_name)
31#else
32#define dirent direct
33#define NAMLEN(dirent) (dirent)->d_namlen
34#ifdef HAVE_SYS_NDIR_H
35#include <sys/ndir.h>
36#endif
37#ifdef HAVE_SYS_DIR_H
38#include <sys/dir.h>
39#endif
40#ifdef HAVE_NDIR_H
41#include <ndir.h>
42#endif
43#endif
44#define NEED_ADD_DIRENT
45
46#if defined(SH_USE_PORTCHECK) && (defined (SH_WITH_CLIENT) || defined (SH_STANDALONE))
47
[193]48/****************************************************************************
49 *
50 * >>> COMMON CODE <<<
51 *
52 ****************************************************************************/
53#if defined(__linux__) || defined(__FreeBSD__)
[180]54
55#include "samhain.h"
56#include "sh_error_min.h"
57#include "sh_utils.h"
58#include "sh_pthread.h"
59
60#define FIL__ _("sh_port2proc.c")
61
62struct sock_store {
63 unsigned long sock;
64 size_t pid;
65 char * path;
66 char * user;
67 struct sock_store * next;
68};
69
70/* /proc:
71 * linux: /proc/pid/exe
72 * freebsd: /proc/pid/file
73 * solaris10: /proc/pid/path/a.out
74 */
75static void get_user_and_path (struct sock_store * add)
76{
77 extern char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
78
79 char path[128];
80 char * buf;
81 struct stat sbuf;
82 int len;
83 char * tmp;
84
85 sl_snprintf (path, sizeof(path), "/proc/%ld/exe", (unsigned long) add->pid);
86
87 if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
88 {
89 goto linkread;
90 }
91
92 sl_snprintf (path, sizeof(path), "/proc/%ld/file", (unsigned long) add->pid);
93
94 if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
95 {
96 goto linkread;
97 }
98
99 sl_snprintf (path, sizeof(path), "/proc/%ld/path/a.out", (unsigned long) add->pid);
100
101 if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
102 {
103 goto linkread;
104 }
105
106 return;
107
108 linkread:
109
110 buf = SH_ALLOC(PATH_MAX);
111 len = readlink(path, buf, PATH_MAX); /* flawfinder: ignore */
112 len = (len >= PATH_MAX) ? (PATH_MAX-1) : len;
113
114 if (len > 0)
115 {
116 buf[len] = '\0';
117 add->path = buf;
118 }
119 else
120 {
121 SH_FREE(buf);
122 }
123
124 add->user = SH_ALLOC(USER_MAX);
125 tmp = sh_unix_getUIDname (SH_ERR_ALL, sbuf.st_uid, add->user, USER_MAX);
126
127 if (!tmp)
128 sl_snprintf (add->user, USER_MAX, "%ld", (unsigned long) sbuf.st_uid);
129
130 return;
131}
132
[195]133#endif
134
135/****************************************************************************
136 *
137 * >>> LINUX CODE <<<
138 *
139 ****************************************************************************/
140
[180]141#if defined(__linux__)
[195]142
143static size_t sh_minpid = 0x0001;
144static size_t sh_maxpid = 0x8000;
145
146#ifndef HAVE_LSTAT
147#define lstat(x,y) stat(x,y)
148#endif /* HAVE_LSTAT */
149
150#if defined(S_IFLNK) && !defined(S_ISLNK)
151# define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
152#else
153# if !defined(S_ISLNK)
154# define S_ISLNK(mode) (0)
155# endif
156#endif
157
158#if defined(__linux__)
[180]159#define PROC_PID_MAX _("/proc/sys/kernel/pid_max")
160
161static int proc_max_pid (size_t * procpid)
162{
163 char * ret;
164 unsigned long pid;
165 FILE * fd;
166 char str[128];
167 char * ptr;
168
169 SL_ENTER(_("proc_max_pid"));
170
171 if (0 == access(PROC_PID_MAX, R_OK)) /* flawfinder: ignore */
172 {
173 if (NULL != (fd = fopen(PROC_PID_MAX, "r")))
174 {
175 str[0] = '\0';
176 ret = fgets(str, 128, fd);
177 if (ret && *str != '\0')
178 {
179 pid = strtoul(str, &ptr, 0);
180 if (*ptr == '\0' || *ptr == '\n')
181 {
182 fclose(fd);
183 *procpid = (size_t) pid;
184 SL_RETURN(0, _("proc_max_pid"));
185 }
186 }
187 fclose(fd);
188 }
189 }
190 SL_RETURN((-1), _("proc_max_pid"));
191}
192#else
193static int proc_max_pid(size_t * procpid)
194{
195 *procpid = sh_maxpid;
196 return 0;
197}
198#endif
199
200static struct sock_store * socklist = NULL;
201
202static void del_sock_all()
203{
204 struct sock_store * del = socklist;
205
206 while (del)
207 {
208 socklist = del->next;
209 if (del->path)
210 SH_FREE(del->path);
211 if (del->user)
212 SH_FREE(del->user);
213 SH_FREE(del);
214 del = socklist;
215 }
216 socklist = NULL;
217 return;
218}
219
220static void add_sock(unsigned long sock, size_t pid)
221{
222 struct sock_store * add = SH_ALLOC(sizeof(struct sock_store));
223
224 add->sock = sock;
225 add->pid = pid;
226 add->path = NULL;
227 add->user = NULL;
228 SH_MUTEX_LOCK(mutex_thread_nolog);
229 get_user_and_path(add);
230 SH_MUTEX_UNLOCK(mutex_thread_nolog);
231 add->next = socklist;
232 socklist = add;
233 return;
234}
235
236static void check_and_add_sock(char * fbuf, size_t pid)
237{
238 if (0 == strncmp(_("socket:["), fbuf, 8))
239 {
240 char * end;
241 unsigned long sock;
242 size_t len = strlen(fbuf);
243 if (fbuf[len-1] == ']')
244 fbuf[len-1] = '\0';
245 sock = strtoul(&fbuf[8], &end, 0);
246 if (*end == '\0' && fbuf[8] != '\0')
247 {
248 add_sock(sock, pid);
249 }
250 }
251}
252
253static void fetch_socks(size_t pid)
254{
255 char path[128];
256 DIR * dir;
257 sl_snprintf(path, sizeof(path), _("/proc/%lu/fd"), (unsigned long) pid);
258
259 dir = opendir(path);
260 if (dir)
261 {
262 struct dirent *entry;
263 while (NULL != (entry = readdir(dir)))
264 {
265 char fpath[384];
266 char fbuf[64];
267 int ret;
268 /* /proc/PID/fd/N-> socket:[15713] */
269 sl_snprintf(fpath, sizeof(fpath), _("%s/%s"), path, entry->d_name);
270 ret = readlink(fpath, fbuf, sizeof(fbuf)-1); /* flawfinder: ignore */
271 if (ret > 0)
272 {
273 fbuf[ret] = '\0';
274 check_and_add_sock(fbuf, pid);
275 }
276 }
277 closedir(dir);
278 }
279}
280
281int sh_port2proc_prepare()
282{
283 size_t i;
284
285 if (0 != proc_max_pid(&sh_maxpid))
286 {
287 SH_MUTEX_LOCK(mutex_thread_nolog);
288 sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, 0, MSG_E_SUBGEN,
289 _("Failed to detect max_pid"),
290 _("sh_port2proc"));
291 SH_MUTEX_UNLOCK(mutex_thread_nolog);
292 SL_RETURN ((-1), _("sh_port2proc"));
293 }
294
295 /* Delete old socket list and re-create it
296 */
297 del_sock_all();
298
299 for (i = sh_minpid; i < sh_maxpid; ++i)
300 {
301 fetch_socks(i);
302 }
303
304 return 0;
305}
306
[235]307void sh_port2proc_finish()
308{
309 /* Delete old socket list
310 */
311 del_sock_all();
312 return;
313}
314
315
[180]316#include <sys/socket.h>
317#include <netinet/in.h>
318#include <arpa/inet.h>
319
[193]320/* returns the command and fills the 'user' array
321 */
[206]322char * sh_port2proc_query(int proto, struct in_addr * saddr, int sport, unsigned long * pid,
[180]323 char * user, size_t userlen)
324{
325 FILE * fd;
326
327 if (proto == IPPROTO_TCP)
328 fd = fopen("/proc/net/tcp", "r");
329 else
330 fd = fopen("/proc/net/udp", "r");
331
[206]332 *pid = 0;
333
[180]334 if (fd)
335 {
336 int n, iface, port, inode;
337 char line[512];
338
339 while (NULL != fgets(line, sizeof(line), fd))
340 {
341
342 if (4 == sscanf(line,
343 "%d: %X:%X %*X:%*X %*X %*X:%*X %*X:%*X %*X %*d %*d %d %*s",
344 &n, &iface, &port, &inode))
345 {
346 struct in_addr haddr;
347 haddr.s_addr = (unsigned long)iface;
348
349 if (haddr.s_addr == saddr->s_addr && port == sport)
350 {
351 struct sock_store * new = socklist;
352
353 while (new)
354 {
355 if ((unsigned int)inode == new->sock)
356 {
357 fclose(fd);
[206]358 *pid = (unsigned long) new->pid;
[180]359 if (new->path)
360 {
361 if (new->user)
362 sl_strlcpy(user, new->user, userlen);
363 else
364 sl_strlcpy(user, "-", userlen);
365 return sh_util_strdup(new->path);
366 }
367 goto err_out;
368 }
369 new = new->next;
370 }
371 }
372 }
373 }
374 fclose(fd);
375 }
376 err_out:
[206]377 sl_strlcpy(user, "-", userlen);
[180]378 return sh_util_strdup("-");
379}
380
381
[193]382/****************************************************************************
383 *
384 * >>> FREEBSD CODE <<<
385 *
386 ****************************************************************************/
387
388#elif defined(__FreeBSD__)
389
390/* Uses code from sockstat.c. Error and memory handling modified.
391 * Only required functions from sockstat.c are included.
392 */
393
394/*-
395 * Copyright (c) 2002 Dag-Erling Co<EF>dan Sm<F8>rgrav
396 * All rights reserved.
397 *
398 * Redistribution and use in source and binary forms, with or without
399 * modification, are permitted provided that the following conditions
400 * are met:
401 * 1. Redistributions of source code must retain the above copyright
402 * notice, this list of conditions and the following disclaimer
403 * in this position and unchanged.
404 * 2. Redistributions in binary form must reproduce the above copyright
405 * notice, this list of conditions and the following disclaimer in the
406 * documentation and/or other materials provided with the distribution.
407 * 3. The name of the author may not be used to endorse or promote products
408 * derived from this software without specific prior written permission.
409 *
410 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
411 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
412 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
413 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
414 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
415 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
416 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
417 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
418 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
419 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
420 */
421#include <sys/cdefs.h>
422__FBSDID("$FreeBSD: src/usr.bin/sockstat/sockstat.c,v 1.13.2.1.4.1 2008/10/02 02:57:24 kensmith Exp $");
423
424#include <sys/param.h>
425#include <sys/socket.h>
426#include <sys/socketvar.h>
427#include <sys/sysctl.h>
428#include <sys/file.h>
429#include <sys/user.h>
430
431#include <sys/un.h>
432#include <sys/unpcb.h>
433
434#include <net/route.h>
435
436#include <netinet/in.h>
437#include <netinet/in_pcb.h>
438#include <netinet/tcp.h>
439#include <netinet/tcp_seq.h>
440#include <netinet/tcp_var.h>
441#include <arpa/inet.h>
442
443#include <ctype.h>
444#include <errno.h>
445#include <netdb.h>
446#include <stdio.h>
447#include <stdlib.h>
448
449#include <unistd.h>
450
451static int opt_4 = 1; /* Show IPv4 sockets */
452static int opt_6 = 0; /* Show IPv6 sockets */
453static int opt_c = 0; /* Show connected sockets */
454static int opt_l = 1; /* Show listening sockets */
455static int opt_v = 0; /* Verbose mode */
456
457struct sock {
458 void *socket;
459 void *pcb;
460 int vflag;
461 int family;
462 int proto;
463
464 struct sockaddr_storage laddr;
465 struct sockaddr_storage faddr;
466 struct sock *next;
467};
468
469#define HASHSIZE 1009
470static struct sock *sockhash[HASHSIZE];
471
472static struct xfile *xfiles;
473static int nxfiles;
474
475
476static void * xrealloc(void * buf, size_t len0, size_t len)
477{
478 if (len > 0)
479 {
[195]480 void * xbuf = SH_ALLOC(len);
481 if (buf)
482 {
483 if (len0 <= len)
484 memcpy(xbuf, buf, len0);
485 else
486 memset(xbuf, '\0', len);
487 SH_FREE(buf);
488 }
[193]489 return xbuf;
490 }
491 SH_FREE(buf);
492 return NULL;
493}
494
495/* Sets address and port in struct sockaddr_storage *sa
496 */
497static void
498sockaddr(struct sockaddr_storage *sa, int af, void *addr, int port)
499{
500 struct sockaddr_in *sin4;
501 struct sockaddr_in6 *sin6;
502
503 bzero(sa, sizeof *sa);
504 switch (af) {
505 case AF_INET:
506 sin4 = (struct sockaddr_in *)sa;
507 sin4->sin_len = sizeof *sin4;
508 sin4->sin_family = af;
509 sin4->sin_port = port;
510 sin4->sin_addr = *(struct in_addr *)addr;
511 break;
512 case AF_INET6:
513 sin6 = (struct sockaddr_in6 *)sa;
514 sin6->sin6_len = sizeof *sin6;
515 sin6->sin6_family = af;
516 sin6->sin6_port = port;
517 sin6->sin6_addr = *(struct in6_addr *)addr;
518 break;
519 default:
520 return;
521 }
522}
523
524/* Get socket information from the kernel.
525 */
526static void
527gather_inet(int proto)
528{
529 struct xinpgen *xig, *exig;
530 struct xinpcb *xip;
531 struct xtcpcb *xtp;
532 struct inpcb *inp;
533 struct xsocket *so;
534 struct sock *sock;
535 char varname[32];
536 size_t len, bufsize, bufsize0;
537 void *buf;
538 int hash, retry, vflag;
539
540 vflag = 0;
541 if (opt_4)
542 vflag |= INP_IPV4;
543 if (opt_6)
544 vflag |= INP_IPV6;
545
546 switch (proto) {
547 case IPPROTO_TCP:
548 sl_strlcpy(varname, _("net.inet.tcp.pcblist"), sizeof(varname));
549 break;
550 case IPPROTO_UDP:
551 sl_strlcpy(varname, _("net.inet.udp.pcblist"), sizeof(varname));
552 break;
553 case IPPROTO_DIVERT:
554 sl_strlcpy(varname, _("net.inet.divert.pcblist"), sizeof(varname));
555 break;
556 default:
557 return;
558 }
559
560 buf = NULL;
[196]561 bufsize = 8192;
[193]562 bufsize0 = bufsize;
563 retry = 5;
564 do {
565 for (;;) {
566 buf = xrealloc(buf, bufsize0, bufsize);
567 bufsize0 = bufsize;
568 len = bufsize;
569 if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
570 break;
[195]571 if (errno == ENOENT)
[193]572 goto out;
573 if (errno != ENOMEM)
574 {
575 SH_MUTEX_LOCK(mutex_thread_nolog);
[195]576 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__,
577 0, MSG_E_SUBGEN,
[193]578 _("sysctlbyname()"),
579 _("gather_inet"));
580 SH_MUTEX_UNLOCK(mutex_thread_nolog);
[195]581 SH_FREE(buf);
[193]582 return;
583 }
584 bufsize *= 2;
585 }
586 xig = (struct xinpgen *)buf;
587 exig = (struct xinpgen *)(void *)
588 ((char *)buf + len - sizeof *exig);
589 if (xig->xig_len != sizeof *xig ||
590 exig->xig_len != sizeof *exig)
591 {
592 SH_MUTEX_LOCK(mutex_thread_nolog);
593 sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, 0, MSG_E_SUBGEN,
594 _("struct xinpgen size mismatch"),
595 _("gather_inet"));
596 SH_MUTEX_UNLOCK(mutex_thread_nolog);
597 goto out;
598 }
599
600 } while (xig->xig_gen != exig->xig_gen && retry--);
601
602 if (xig->xig_gen != exig->xig_gen && opt_v)
603 {
604 SH_MUTEX_LOCK(mutex_thread_nolog);
605 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
606 _("data may be inconsistent"),
607 _("gather_inet"));
608 SH_MUTEX_UNLOCK(mutex_thread_nolog);
609 }
610
611 for (;;) {
612 xig = (struct xinpgen *)(void *)((char *)xig + xig->xig_len);
613 if (xig >= exig)
614 break;
615 switch (proto) {
616 case IPPROTO_TCP:
617 xtp = (struct xtcpcb *)xig;
618 if (xtp->xt_len != sizeof *xtp) {
619 SH_MUTEX_LOCK(mutex_thread_nolog);
620 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
621 _("struct xtcpcb size mismatch"),
622 _("gather_inet"));
623 SH_MUTEX_UNLOCK(mutex_thread_nolog);
624 goto out;
625 }
626 inp = &xtp->xt_inp;
627 so = &xtp->xt_socket;
628 break;
629 case IPPROTO_UDP:
630 case IPPROTO_DIVERT:
631 xip = (struct xinpcb *)xig;
632 if (xip->xi_len != sizeof *xip) {
633 SH_MUTEX_LOCK(mutex_thread_nolog);
634 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
635 _("struct xinpcb size mismatch"),
636 _("gather_inet"));
637 SH_MUTEX_UNLOCK(mutex_thread_nolog);
638 goto out;
639 }
640 inp = &xip->xi_inp;
641 so = &xip->xi_socket;
642 break;
643 default:
644 return;
645 }
646 if ((inp->inp_vflag & vflag) == 0)
647 continue;
648 if (inp->inp_vflag & INP_IPV4) {
649 if ((inp->inp_fport == 0 && !opt_l) ||
650 (inp->inp_fport != 0 && !opt_c))
651 continue;
652 } else if (inp->inp_vflag & INP_IPV6) {
653 if ((inp->in6p_fport == 0 && !opt_l) ||
654 (inp->in6p_fport != 0 && !opt_c))
655 continue;
656 } else {
657 if (opt_v) {
658 char errmsg[64];
659 sl_snprintf(errmsg, sizeof(errmsg),
660 _("invalid vflag 0x%x"), inp->inp_vflag);
661 SH_MUTEX_LOCK(mutex_thread_nolog);
662 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
663 errmsg,
664 _("gather_inet"));
665 SH_MUTEX_UNLOCK(mutex_thread_nolog);
666 continue;
667 }
668 }
669
670 sock = SH_ALLOC(sizeof *sock);
671 memset(sock, '\0', sizeof (*sock));
672
673 sock->socket = so->xso_so;
674 sock->proto = proto;
675 if (inp->inp_vflag & INP_IPV4) {
676 sock->family = AF_INET;
677 sockaddr(&sock->laddr, sock->family,
678 &inp->inp_laddr, inp->inp_lport);
679 sockaddr(&sock->faddr, sock->family,
680 &inp->inp_faddr, inp->inp_fport);
681 } else if (inp->inp_vflag & INP_IPV6) {
682 sock->family = AF_INET6;
683 sockaddr(&sock->laddr, sock->family,
684 &inp->in6p_laddr, inp->in6p_lport);
685 sockaddr(&sock->faddr, sock->family,
686 &inp->in6p_faddr, inp->in6p_fport);
687 }
688 sock->vflag = inp->inp_vflag;
689
690 hash = (int)((uintptr_t)sock->socket % HASHSIZE);
691 sock->next = sockhash[hash];
692 sockhash[hash] = sock;
693 }
694out:
[195]695 if (buf)
696 SH_FREE(buf);
[193]697}
698
699static void
700getfiles(void)
701{
702 size_t len;
703 size_t len0;
704
705 xfiles = SH_ALLOC(len = sizeof *xfiles);
706 len0 = len;
707
708 while (sysctlbyname(_("kern.file"), xfiles, &len, 0, 0) == -1) {
709 if (errno != ENOMEM)
710 {
[195]711 volatile int status = errno;
[193]712 SH_MUTEX_LOCK(mutex_thread_nolog);
713 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
714 _("sysctlbyname()"),
715 _("getfiles"));
716 SH_MUTEX_UNLOCK(mutex_thread_nolog);
717 }
718 len *= 2;
719 xfiles = xrealloc(xfiles, len0, len);
720 len0 = len;
721 }
722 if (len > 0 && xfiles->xf_size != sizeof *xfiles)
723 if (errno != ENOMEM)
724 {
[195]725 volatile int status = errno;
[193]726 SH_MUTEX_LOCK(mutex_thread_nolog);
727 sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
728 _("struct xfile size mismatch"),
729 _("getfiles"));
730 SH_MUTEX_UNLOCK(mutex_thread_nolog);
731 }
732 nxfiles = len / sizeof *xfiles;
733}
734
735static const char *
736getprocname(pid_t pid)
737{
738 static struct kinfo_proc proc;
739 size_t len;
740 int mib[4];
741
742 mib[0] = CTL_KERN;
743 mib[1] = KERN_PROC;
744 mib[2] = KERN_PROC_PID;
745 mib[3] = (int)pid;
746 len = sizeof proc;
747 if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
748 /* Do not warn if the process exits before we get its name. */
749 if (errno != ESRCH)
750 {
[195]751 volatile int status = errno;
[193]752 SH_MUTEX_LOCK(mutex_thread_nolog);
753 sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_SUBGEN,
754 _("sysctl()"),
755 _("getfiles"));
756 SH_MUTEX_UNLOCK(mutex_thread_nolog);
757 }
758 return ("-");
759 }
760 return (proc.ki_ocomm);
761}
762
[180]763char * sh_port2proc_query(int proto, struct in_addr * saddr, int sport,
[206]764 unsigned long * pid, char * user, size_t userlen)
[180]765{
[195]766 int n, hash;
[193]767 struct xfile *xf;
768 struct in_addr * haddr;
[195]769 struct sock * s;
[206]770
771 *pid = 0;
[193]772
773 for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
774
775 if (xf->xf_data == NULL)
776 continue;
777
778 /* Find the socket in sockhash[] that corresponds to it
779 */
780 hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
781 for (s = sockhash[hash]; s != NULL; s = s->next)
782 if ((void *)s->socket == xf->xf_data)
783 break;
784
[195]785 if (!s)
786 continue;
787
788 /* fprintf(stderr, "FIXME: %d %d, %d %d, %d %d, %d, %d\n", s->proto, proto,
789 s->family, AF_INET,
790 sport, ntohs(((struct sockaddr_in *)(&s->laddr))->sin_port),
791 (int) xf->xf_uid, (int)xf->xf_pid);
792 */
793
[193]794 if (s->proto != proto)
795 continue;
796
797 if (s->family != AF_INET /* && s->family != AF_INET6 */)
798 continue;
799
[195]800 if (sport != ntohs(((struct sockaddr_in *)(&s->laddr))->sin_port))
[193]801 continue;
802
[195]803 haddr = &((struct sockaddr_in *)(&s->laddr))->sin_addr;
804
805 /* fprintf(stderr, "FIXME: %s\n", inet_ntoa(*haddr)); */
806 /* fprintf(stderr, "FIXME: %s\n", inet_ntoa(*saddr)); */
807
808 if (haddr->s_addr == saddr->s_addr || inet_lnaof(*saddr) == INADDR_ANY || inet_lnaof(*haddr) == INADDR_ANY)
[193]809 {
[195]810 struct sock_store try;
811
[206]812 *pid = xf->xf_pid;
813
[195]814 try.pid = xf->xf_pid;
815 try.path = NULL;
816 try.user = NULL;
817 get_user_and_path (&try); /* Try to get info from /proc */
818
819 if (try.path == NULL)
820 {
821 extern char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
822 char * tmp = sh_unix_getUIDname (SH_ERR_ALL, xf->xf_uid, user, userlen);
823 if (!tmp)
824 sl_snprintf (user, userlen, "%ld", (unsigned long) xf->xf_uid);
825 return sh_util_strdup(getprocname(xf->xf_pid));
826 }
827 else
828 {
829 sl_strlcpy(user, try.user, userlen);
830 SH_FREE(try.user);
831 return try.path;
832 }
[193]833 }
834 }
[195]835 sl_strlcpy(user, "-", userlen);
836 return sh_util_strdup("-");
[193]837}
838
839static void sockdel(struct sock * sock)
840{
841 if (sock)
842 {
843 if (sock->next)
844 sockdel(sock->next);
845 SH_FREE(sock);
846 }
847 return;
848}
849
850int sh_port2proc_prepare()
851{
852 int i;
853
854 if (xfiles)
855 {
856 SH_FREE(xfiles);
857 xfiles = NULL;
858 }
859
860 for (i = 0; i < HASHSIZE; ++i)
[195]861 {
862 sockdel(sockhash[i]);
863 sockhash[i] = NULL;
864 }
[193]865
866 /* Inet connections
867 */
868 gather_inet(IPPROTO_TCP);
869 gather_inet(IPPROTO_UDP);
870 gather_inet(IPPROTO_DIVERT);
871
872 getfiles();
873
874 return 0;
875}
876
[235]877void sh_port2proc_finish()
878{
879 return;
880}
881
[193]882#else /* !defined(__linux__) && !defined(__FreeBSD__) */
883
884char * sh_port2proc_query(int proto, struct in_addr * saddr, int sport,
[206]885 unsigned long * pid, char * user, size_t userlen)
[193]886{
[180]887 (void) proto;
888 (void) saddr;
889 (void) sport;
890
[206]891 *pid = 0;
892
[180]893 sl_strlcpy(user, "-", userlen);
894 return sh_util_strdup("-");
895}
896
897int sh_port2proc_prepare()
898{
899 return 0;
900}
901
[235]902void sh_port2proc_finish()
903{
904 return;
905}
[180]906#endif
907
908#endif /* defined(SH_USE_PORTCHECK) */
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