Context Navigation

source: trunk/src/sh_port2proc.c@ 422

Last change on this file since 422 was 384, checked in by katerina, 13 years ago
Fix for ticket #282 (compile issues on FreeBSD).
File size: 28.2 KB

Line
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 <netinet/in.h>
27	#include <arpa/inet.h>
28	#include <unistd.h>
29
30	#ifdef HAVE_DIRENT_H
31	#include <dirent.h>
32	#define NAMLEN(dirent) sl_strlen((dirent)->d_name)
33	#else
34	#define dirent direct
35	#define NAMLEN(dirent) (dirent)->d_namlen
36	#ifdef HAVE_SYS_NDIR_H
37	#include <sys/ndir.h>
38	#endif
39	#ifdef HAVE_SYS_DIR_H
40	#include <sys/dir.h>
41	#endif
42	#ifdef HAVE_NDIR_H
43	#include <ndir.h>
44	#endif
45	#endif
46	#define NEED_ADD_DIRENT
47
48	#if defined(SH_USE_PORTCHECK) && (defined (SH_WITH_CLIENT) \|\| defined (SH_STANDALONE))
49
50	/* #define DEBUG_P2P 1 */
51
52	#include "samhain.h"
53	#include "sh_utils.h"
54
55	/****************************************************************************
56	*
57	* >>> COMMON CODE <<<
58	*
59	****************************************************************************/
60	#if defined(__linux__) \|\| defined(__FreeBSD__)
61
62	#include "sh_error_min.h"
63	#include "sh_pthread.h"
64	#include "sh_ipvx.h"
65
66	#define FIL__ _("sh_port2proc.c")
67
68	struct sock_store {
69	unsigned long sock;
70	size_t pid;
71	char * path;
72	char * user;
73	struct sock_store * next;
74	};
75
76	/* /proc:
77	* linux: /proc/pid/exe
78	* freebsd: /proc/pid/file
79	* solaris10: /proc/pid/path/a.out
80	*/
81	static void get_user_and_path (struct sock_store * add)
82	{
83	extern char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
84
85	char path[128];
86	char * buf;
87	struct stat sbuf;
88	int len;
89	char * tmp;
90
91	sl_snprintf (path, sizeof(path), "/proc/%ld/exe", (unsigned long) add->pid);
92
93	if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
94	{
95	goto linkread;
96	}
97
98	sl_snprintf (path, sizeof(path), "/proc/%ld/file", (unsigned long) add->pid);
99
100	if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
101	{
102	goto linkread;
103	}
104
105	sl_snprintf (path, sizeof(path), "/proc/%ld/path/a.out", (unsigned long) add->pid);
106
107	if (0 == retry_lstat(FIL__, __LINE__, path, &sbuf) && S_ISLNK(sbuf.st_mode))
108	{
109	goto linkread;
110	}
111
112	return;
113
114	linkread:
115
116	buf = SH_ALLOC(PATH_MAX);
117	len = readlink(path, buf, PATH_MAX); /* flawfinder: ignore */
118	len = (len >= PATH_MAX) ? (PATH_MAX-1) : len;
119
120	if (len > 0)
121	{
122	buf[len] = '\0';
123	add->path = buf;
124	}
125	else
126	{
127	SH_FREE(buf);
128	}
129
130	add->user = SH_ALLOC(USER_MAX);
131	tmp = sh_unix_getUIDname (SH_ERR_ALL, sbuf.st_uid, add->user, USER_MAX);
132
133	if (!tmp)
134	sl_snprintf (add->user, USER_MAX, "%ld", (unsigned long) sbuf.st_uid);
135
136	return;
137	}
138
139	#endif
140
141	/****************************************************************************
142	*
143	* >>> LINUX CODE <<<
144	*
145	****************************************************************************/
146
147	#if defined(__linux__)
148
149	static size_t sh_minpid = 0x0001;
150	static size_t sh_maxpid = 0x8000;
151
152	#ifndef HAVE_LSTAT
153	#define lstat(x,y) stat(x,y)
154	#endif /* HAVE_LSTAT */
155
156	#if defined(S_IFLNK) && !defined(S_ISLNK)
157	# define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
158	#else
159	# if !defined(S_ISLNK)
160	# define S_ISLNK(mode) (0)
161	# endif
162	#endif
163
164	#if defined(__linux__)
165	#define PROC_PID_MAX _("/proc/sys/kernel/pid_max")
166
167	static int proc_max_pid (size_t * procpid)
168	{
169	char * ret;
170	unsigned long pid;
171	FILE * fd;
172	char str[128];
173	char * ptr;
174
175	SL_ENTER(_("proc_max_pid"));
176
177	if (0 == access(PROC_PID_MAX, R_OK)) /* flawfinder: ignore */
178	{
179	if (NULL != (fd = fopen(PROC_PID_MAX, "r")))
180	{
181	str[0] = '\0';
182	ret = fgets(str, 128, fd);
183	if (ret && *str != '\0')
184	{
185	pid = strtoul(str, &ptr, 0);
186	if (ptr == '\0' \|\| ptr == '\n')
187	{
188	sl_fclose(FIL__, __LINE__, fd);
189	*procpid = (size_t) pid;
190	SL_RETURN(0, _("proc_max_pid"));
191	}
192	}
193	sl_fclose(FIL__, __LINE__, fd);
194	}
195	}
196	SL_RETURN((-1), _("proc_max_pid"));
197	}
198	#else
199	static int proc_max_pid(size_t * procpid)
200	{
201	*procpid = sh_maxpid;
202	return 0;
203	}
204	#endif
205
206	static struct sock_store * socklist = NULL;
207
208	static void del_sock_all()
209	{
210	struct sock_store * del = socklist;
211
212	while (del)
213	{
214	socklist = del->next;
215	if (del->path)
216	SH_FREE(del->path);
217	if (del->user)
218	SH_FREE(del->user);
219	SH_FREE(del);
220	del = socklist;
221	}
222	socklist = NULL;
223	return;
224	}
225
226	static void add_sock(unsigned long sock, size_t pid)
227	{
228	struct sock_store * add = SH_ALLOC(sizeof(struct sock_store));
229
230	add->sock = sock;
231	add->pid = pid;
232	add->path = NULL;
233	add->user = NULL;
234	SH_MUTEX_LOCK(mutex_thread_nolog);
235	get_user_and_path(add);
236	SH_MUTEX_UNLOCK(mutex_thread_nolog);
237	add->next = socklist;
238	socklist = add;
239	return;
240	}
241
242	static void check_and_add_sock(char * fbuf, size_t pid)
243	{
244	if (0 == strncmp(_("socket:["), fbuf, 8))
245	{
246	char * end;
247	unsigned long sock;
248	size_t len = strlen(fbuf);
249	if (fbuf[len-1] == ']')
250	fbuf[len-1] = '\0';
251	sock = strtoul(&fbuf[8], &end, 0);
252	if (*end == '\0' && fbuf[8] != '\0')
253	{
254	add_sock(sock, pid);
255	}
256	}
257	}
258
259	static void fetch_socks(size_t pid)
260	{
261	char path[128];
262	DIR * dir;
263	sl_snprintf(path, sizeof(path), _("/proc/%lu/fd"), (unsigned long) pid);
264
265	dir = opendir(path);
266	if (dir)
267	{
268	struct dirent *entry;
269	while (NULL != (entry = readdir(dir)))
270	{
271	char fpath[384];
272	char fbuf[64];
273	int ret;
274	/* /proc/PID/fd/N-> socket:[15713] */
275	sl_snprintf(fpath, sizeof(fpath), _("%s/%s"), path, entry->d_name);
276	ret = readlink(fpath, fbuf, sizeof(fbuf)-1); /* flawfinder: ignore */
277	if (ret > 0)
278	{
279	fbuf[ret] = '\0';
280	check_and_add_sock(fbuf, pid);
281	}
282	}
283	closedir(dir);
284	}
285	}
286
287	int sh_port2proc_prepare()
288	{
289	size_t i;
290
291	if (0 != proc_max_pid(&sh_maxpid))
292	{
293	SH_MUTEX_LOCK(mutex_thread_nolog);
294	sh_error_handle(SH_ERR_ALL, FIL__, __LINE__, 0, MSG_E_SUBGEN,
295	_("Failed to detect max_pid"),
296	_("sh_port2proc"));
297	SH_MUTEX_UNLOCK(mutex_thread_nolog);
298	SL_RETURN ((-1), _("sh_port2proc"));
299	}
300
301	/* Delete old socket list and re-create it
302	*/
303	del_sock_all();
304
305	for (i = sh_minpid; i < sh_maxpid; ++i)
306	{
307	fetch_socks(i);
308	}
309
310	return 0;
311	}
312
313	void sh_port2proc_finish()
314	{
315	/* Delete old socket list
316	*/
317	del_sock_all();
318	return;
319	}
320
321
322	#include <sys/socket.h>
323	#include <netinet/in.h>
324	#include <arpa/inet.h>
325
326	/* returns the command and fills the 'user' array
327	*/
328	static char * port2proc_query(char * file, int proto, int domain,
329	struct sh_sockaddr * saddr, int sport,
330	unsigned long * pid, char * user, size_t userlen)
331	{
332	FILE * fd;
333
334	fd = fopen(file, "r");
335
336	*pid = 0;
337
338	#ifdef DEBUG_P2P
339	{
340	char errmsg[256];
341	char siface[SH_IP_BUF];
342	sh_ipvx_ntoa(siface, sizeof(siface), saddr);
343	sl_snprintf(errmsg, sizeof(errmsg),
344	"query, file=%s, proto=%d, port=%d, iface=%s\n",
345	file, proto, sport, siface);
346	fprintf(stderr, "%s", errmsg);
347	}
348	#endif
349
350	if (fd)
351	{
352	unsigned int n, i, port, niface, inode, istatus;
353	char line[512];
354	char ip_port[128];
355	char iface[SH_IP_BUF];
356
357	while (NULL != fgets(line, sizeof(line), fd))
358	{
359
360	#ifdef DEBUG_P2P
361	{
362	fprintf(stderr, "%s", line);
363	}
364	#endif
365
366	if (4 == sscanf(line,
367	"%u: %127s %X:%X %X %X:%X %X:%X %X %d %d %u %s",
368	&n, ip_port, &istatus, &inode))
369	{
370	struct sockaddr_in addr4;
371	struct sockaddr_in6 addr6;
372	struct sh_sockaddr ss;
373
374	char * p;
375
376	ip_port[127] = '\0';
377
378	p = strchr(ip_port, ':');
379
380	if (p)
381	{
382	*p = '\0'; ++p;
383	port = (unsigned int) strtoul(p, NULL, 16);
384	sl_strlcpy(iface, ip_port, sizeof(iface));
385	}
386	else
387	{
388	continue;
389	}
390
391	niface = 0;
392
393	switch (domain)
394	{
395	case AF_INET:
396	addr4.sin_addr.s_addr = (int) strtol(iface, NULL, 16);
397	niface = (unsigned int) addr4.sin_addr.s_addr;
398	sh_ipvx_save(&ss, AF_INET, (struct sockaddr *)&addr4);
399	break;
400
401	case AF_INET6:
402	sscanf(iface,
403	"%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
404	&addr6.sin6_addr.s6_addr[3], &addr6.sin6_addr.s6_addr[2], &addr6.sin6_addr.s6_addr[1], &addr6.sin6_addr.s6_addr[0],
405	&addr6.sin6_addr.s6_addr[7], &addr6.sin6_addr.s6_addr[6], &addr6.sin6_addr.s6_addr[5], &addr6.sin6_addr.s6_addr[4],
406	&addr6.sin6_addr.s6_addr[11], &addr6.sin6_addr.s6_addr[10], &addr6.sin6_addr.s6_addr[9], &addr6.sin6_addr.s6_addr[8],
407	&addr6.sin6_addr.s6_addr[15], &addr6.sin6_addr.s6_addr[14], &addr6.sin6_addr.s6_addr[13], &addr6.sin6_addr.s6_addr[12]);
408
409	for (i = 0; i < 16; ++i)
410	{
411	if (0 != (unsigned int) addr6.sin6_addr.s6_addr[i])
412	++niface;
413	}
414	sh_ipvx_save(&ss, AF_INET6, (struct sockaddr *)&addr6);
415	break;
416	}
417
418	#ifdef DEBUG_P2P
419	{
420	char a[SH_IP_BUF];
421	char b[SH_IP_BUF];
422
423	sh_ipvx_ntoa(a, sizeof(a), &ss);
424	sh_ipvx_ntoa(b, sizeof(b), saddr);
425
426	fprintf(stderr, " -> inode %u, iface/port %s,%u, status %u, searching %s,%u, %u\n",
427	inode, a, port, istatus, b, sport,
428	proto == IPPROTO_TCP ? 0x0a : 0x07);
429	}
430	#endif
431
432	if (proto == IPPROTO_TCP && istatus != 0x0a)
433	continue;
434	if (proto == IPPROTO_UDP && istatus == 0x01)
435	continue;
436
437	#ifdef DEBUG_P2P
438	{
439	fprintf(stderr, "check iface %u..\n", iface);
440	}
441	#endif
442
443	if ((proto == IPPROTO_UDP \|\| niface == 0 \|\| 0 == sh_ipvx_cmp(&ss, saddr)) &&
444	port == (unsigned int)sport)
445	{
446	struct sock_store * new = socklist;
447
448	#ifdef DEBUG_P2P
449	{
450	fprintf(stderr, "found it\n");
451	}
452	#endif
453
454	while (new)
455	{
456	#ifdef DEBUG_P2P
457	{
458	fprintf(stderr, "searching inode %u: %lu\n",
459	inode, new->sock);
460	}
461	#endif
462	if (inode == new->sock)
463	{
464	#ifdef DEBUG_P2P
465	{
466	fprintf(stderr, "found it: path=(%s), user=(%s)\n",
467	new->path == NULL ? "NULL" : new->path,
468	new->user == NULL ? "NULL" : new->user);
469	}
470	#endif
471	sl_fclose(FIL__, __LINE__, fd);
472	*pid = (unsigned long) new->pid;
473	if (new->path)
474	{
475	if (new->user)
476	sl_strlcpy(user, new->user, userlen);
477	else
478	sl_strlcpy(user, "-", userlen);
479	return sh_util_strdup(new->path);
480	}
481	goto err_out;
482	}
483	new = new->next;
484	}
485	}
486	}
487	}
488	sl_fclose(FIL__, __LINE__, fd);
489	}
490	err_out:
491	sl_strlcpy(user, "-", userlen);
492	return sh_util_strdup("-");
493	}
494
495	/* returns the command and fills the 'user' array
496	*/
497	char * sh_port2proc_query(int proto, struct sh_sockaddr * saddr, int sport,
498	unsigned long * pid, char * user, size_t userlen)
499	{
500	char file[32];
501	char * ret;
502
503	if (proto == IPPROTO_TCP)
504	{
505	sl_strlcpy(file, _("/proc/net/tcp"), sizeof(file));
506	ret = port2proc_query(file, proto, AF_INET, saddr, sport, pid, user, userlen);
507
508	if (ret[0] == '-' && ret[1] == '\0')
509	{
510	SH_FREE(ret);
511	sl_strlcpy(file, _("/proc/net/tcp6"), sizeof(file));
512	ret = port2proc_query(file, proto, AF_INET6, saddr, sport, pid, user, userlen);
513	}
514	return ret;
515	}
516	else
517	{
518	char * ret;
519	sl_strlcpy(file, _("/proc/net/udp"), sizeof(file));
520	ret = port2proc_query(file, proto, AF_INET, saddr, sport, pid, user, userlen);
521
522	if (ret[0] == '-' && ret[1] == '\0')
523	{
524	SH_FREE(ret);
525	sl_strlcpy(file, _("/proc/net/udp6"), sizeof(file));
526	ret = port2proc_query(file, proto, AF_INET6, saddr, sport, pid, user, userlen);
527	}
528	return ret;
529	}
530	}
531
532
533	/****************************************************************************
534	*
535	* >>> FREEBSD CODE <<<
536	*
537	****************************************************************************/
538
539	#elif defined(__FreeBSD__)
540
541	/* Uses code from sockstat.c. Error and memory handling modified.
542	* Only required functions from sockstat.c are included.
543	*/
544
545	/*-
546	* Copyright (c) 2002 Dag-Erling Co<EF>dan Sm<F8>rgrav
547	* All rights reserved.
548	*
549	* Redistribution and use in source and binary forms, with or without
550	* modification, are permitted provided that the following conditions
551	* are met:
552	* 1. Redistributions of source code must retain the above copyright
553	* notice, this list of conditions and the following disclaimer
554	* in this position and unchanged.
555	* 2. Redistributions in binary form must reproduce the above copyright
556	* notice, this list of conditions and the following disclaimer in the
557	* documentation and/or other materials provided with the distribution.
558	* 3. The name of the author may not be used to endorse or promote products
559	* derived from this software without specific prior written permission.
560	*
561	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
562	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
563	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
564	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
565	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
566	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
567	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
568	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
569	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
570	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
571	*/
572	#include <sys/cdefs.h>
573	__FBSDID("$FreeBSD: src/usr.bin/sockstat/sockstat.c,v 1.13.2.1.4.1 2008/10/02 02:57:24 kensmith Exp $");
574
575	#include <sys/param.h>
576	#include <sys/socket.h>
577	#include <sys/socketvar.h>
578	#include <sys/sysctl.h>
579	#include <sys/file.h>
580	#include <sys/user.h>
581
582	#include <sys/un.h>
583	#include <sys/unpcb.h>
584
585	#include <net/route.h>
586
587	#include <netinet/in.h>
588	#include <netinet/in_pcb.h>
589	#include <netinet/tcp.h>
590	#include <netinet/tcp_seq.h>
591	#include <netinet/tcp_var.h>
592	#include <arpa/inet.h>
593
594	#include <ctype.h>
595	#include <errno.h>
596	#include <netdb.h>
597	#include <stdio.h>
598	#include <stdlib.h>
599
600	#include <unistd.h>
601
602	static int opt_4 = 1; /* Show IPv4 sockets */
603	static int opt_6 = 1; /* Show IPv6 sockets */
604	static int opt_c = 0; /* Show connected sockets */
605	static int opt_l = 1; /* Show listening sockets */
606	static int opt_v = 0; /* Verbose mode */
607
608	struct sock {
609	void *socket;
610	void *pcb;
611	int vflag;
612	int family;
613	int proto;
614
615	struct sockaddr_storage laddr;
616	struct sockaddr_storage faddr;
617	struct sock *next;
618	};
619
620	#define HASHSIZE 1009
621	static struct sock *sockhash[HASHSIZE];
622
623	static struct xfile *xfiles;
624	static int nxfiles;
625
626
627	static void * xrealloc(void * buf, size_t len0, size_t len)
628	{
629	if (len > 0)
630	{
631	void * xbuf = SH_ALLOC(len);
632	if (buf)
633	{
634	if (len0 <= len)
635	memcpy(xbuf, buf, len0);
636	else
637	memset(xbuf, '\0', len);
638	SH_FREE(buf);
639	}
640	return xbuf;
641	}
642	SH_FREE(buf);
643	return NULL;
644	}
645
646	/* Sets address and port in struct sockaddr_storage *sa
647	*/
648	static void
649	sockaddr(struct sockaddr_storage sa, int af, void addr, int port)
650	{
651	struct sockaddr_in *sin4;
652	struct sockaddr_in6 *sin6;
653
654	bzero(sa, sizeof *sa);
655	switch (af) {
656	case AF_INET:
657	sin4 = (struct sockaddr_in *)sa;
658	sin4->sin_len = sizeof *sin4;
659	sin4->sin_family = af;
660	sin4->sin_port = port;
661	sin4->sin_addr = (struct in_addr )addr;
662	break;
663	case AF_INET6:
664	sin6 = (struct sockaddr_in6 *)sa;
665	sin6->sin6_len = sizeof *sin6;
666	sin6->sin6_family = af;
667	sin6->sin6_port = port;
668	sin6->sin6_addr = (struct in6_addr )addr;
669	break;
670	default:
671	return;
672	}
673	}
674
675	/* Get socket information from the kernel.
676	*/
677	static void
678	gather_inet(int proto)
679	{
680	struct xinpgen xig, exig;
681	struct xinpcb *xip;
682	struct xtcpcb *xtp;
683	struct inpcb *inp;
684	struct xsocket *so;
685	struct sock *sock;
686	char varname[32];
687	size_t len, bufsize, bufsize0;
688	void *buf;
689	int hash, retry, vflag;
690
691	vflag = 0;
692	if (opt_4)
693	vflag \|= INP_IPV4;
694	if (opt_6)
695	vflag \|= INP_IPV6;
696
697	switch (proto) {
698	case IPPROTO_TCP:
699	sl_strlcpy(varname, _("net.inet.tcp.pcblist"), sizeof(varname));
700	break;
701	case IPPROTO_UDP:
702	sl_strlcpy(varname, _("net.inet.udp.pcblist"), sizeof(varname));
703	break;
704	case IPPROTO_DIVERT:
705	sl_strlcpy(varname, _("net.inet.divert.pcblist"), sizeof(varname));
706	break;
707	default:
708	return;
709	}
710
711	buf = NULL;
712	bufsize = 8192;
713	bufsize0 = bufsize;
714	retry = 5;
715	do {
716	for (;;) {
717	buf = xrealloc(buf, bufsize0, bufsize);
718	bufsize0 = bufsize;
719	len = bufsize;
720	if (sysctlbyname(varname, buf, &len, NULL, 0) == 0)
721	break;
722	if (errno == ENOENT)
723	goto out;
724	if (errno != ENOMEM)
725	{
726	SH_MUTEX_LOCK(mutex_thread_nolog);
727	sh_error_handle(SH_ERR_ERR, FIL__, __LINE__,
728	0, MSG_E_SUBGEN,
729	_("sysctlbyname()"),
730	_("gather_inet"));
731	SH_MUTEX_UNLOCK(mutex_thread_nolog);
732	SH_FREE(buf);
733	return;
734	}
735	bufsize *= 2;
736	}
737	xig = (struct xinpgen *)buf;
738	exig = (struct xinpgen )(void )
739	((char )buf + len - sizeof exig);
740	if (xig->xig_len != sizeof *xig \|\|
741	exig->xig_len != sizeof *exig)
742	{
743	SH_MUTEX_LOCK(mutex_thread_nolog);
744	sh_error_handle(SH_ERR_ERR, FIL__, __LINE__, 0, MSG_E_SUBGEN,
745	_("struct xinpgen size mismatch"),
746	_("gather_inet"));
747	SH_MUTEX_UNLOCK(mutex_thread_nolog);
748	goto out;
749	}
750
751	} while (xig->xig_gen != exig->xig_gen && retry--);
752
753	if (xig->xig_gen != exig->xig_gen && opt_v)
754	{
755	SH_MUTEX_LOCK(mutex_thread_nolog);
756	sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
757	_("data may be inconsistent"),
758	_("gather_inet"));
759	SH_MUTEX_UNLOCK(mutex_thread_nolog);
760	}
761
762	for (;;) {
763	xig = (struct xinpgen )(void )((char *)xig + xig->xig_len);
764	if (xig >= exig)
765	break;
766	switch (proto) {
767	case IPPROTO_TCP:
768	xtp = (struct xtcpcb *)xig;
769	if (xtp->xt_len != sizeof *xtp) {
770	SH_MUTEX_LOCK(mutex_thread_nolog);
771	sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
772	_("struct xtcpcb size mismatch"),
773	_("gather_inet"));
774	SH_MUTEX_UNLOCK(mutex_thread_nolog);
775	goto out;
776	}
777	inp = &xtp->xt_inp;
778	so = &xtp->xt_socket;
779	break;
780	case IPPROTO_UDP:
781	case IPPROTO_DIVERT:
782	xip = (struct xinpcb *)xig;
783	if (xip->xi_len != sizeof *xip) {
784	SH_MUTEX_LOCK(mutex_thread_nolog);
785	sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
786	_("struct xinpcb size mismatch"),
787	_("gather_inet"));
788	SH_MUTEX_UNLOCK(mutex_thread_nolog);
789	goto out;
790	}
791	inp = &xip->xi_inp;
792	so = &xip->xi_socket;
793	break;
794	default:
795	return;
796	}
797	if ((inp->inp_vflag & vflag) == 0)
798	continue;
799	if (inp->inp_vflag & INP_IPV4) {
800	if ((inp->inp_fport == 0 && !opt_l) \|\|
801	(inp->inp_fport != 0 && !opt_c))
802	continue;
803	} else if (inp->inp_vflag & INP_IPV6) {
804	#ifndef in6p_fport
805	#define in6p_fport inp_fport
806	#endif
807	if ((inp->in6p_fport == 0 && !opt_l) \|\|
808	(inp->in6p_fport != 0 && !opt_c))
809	continue;
810	} else {
811	if (opt_v) {
812	char errmsg[64];
813	sl_snprintf(errmsg, sizeof(errmsg),
814	_("invalid vflag 0x%x"), inp->inp_vflag);
815	SH_MUTEX_LOCK(mutex_thread_nolog);
816	sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, 0, MSG_E_SUBGEN,
817	errmsg,
818	_("gather_inet"));
819	SH_MUTEX_UNLOCK(mutex_thread_nolog);
820	continue;
821	}
822	}
823
824	sock = SH_ALLOC(sizeof *sock);
825	memset(sock, '\0', sizeof (*sock));
826
827	#ifndef in6p_lport
828	#define in6p_lport inp_lport
829	#endif
830	sock->socket = so->xso_so;
831	sock->proto = proto;
832	if (inp->inp_vflag & INP_IPV4) {
833	sock->family = AF_INET;
834	sockaddr(&sock->laddr, sock->family,
835	&inp->inp_laddr, inp->inp_lport);
836	sockaddr(&sock->faddr, sock->family,
837	&inp->inp_faddr, inp->inp_fport);
838	} else if (inp->inp_vflag & INP_IPV6) {
839	sock->family = AF_INET6;
840	sockaddr(&sock->laddr, sock->family,
841	&inp->in6p_laddr, inp->in6p_lport);
842	sockaddr(&sock->faddr, sock->family,
843	&inp->in6p_faddr, inp->in6p_fport);
844	}
845	sock->vflag = inp->inp_vflag;
846
847	hash = (int)((uintptr_t)sock->socket % HASHSIZE);
848	sock->next = sockhash[hash];
849	sockhash[hash] = sock;
850	}
851	out:
852	if (buf)
853	SH_FREE(buf);
854	}
855
856	static void
857	getfiles(void)
858	{
859	size_t len;
860	size_t len0;
861
862	xfiles = SH_ALLOC(len = sizeof *xfiles);
863	len0 = len;
864
865	while (sysctlbyname(_("kern.file"), xfiles, &len, 0, 0) == -1) {
866	if (errno != ENOMEM)
867	{
868	volatile int status = errno;
869	SH_MUTEX_LOCK(mutex_thread_nolog);
870	sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
871	_("sysctlbyname()"),
872	_("getfiles"));
873	SH_MUTEX_UNLOCK(mutex_thread_nolog);
874	}
875	len *= 2;
876	xfiles = xrealloc(xfiles, len0, len);
877	len0 = len;
878	}
879	if (len > 0 && xfiles->xf_size != sizeof *xfiles)
880	if (errno != ENOMEM)
881	{
882	volatile int status = errno;
883	SH_MUTEX_LOCK(mutex_thread_nolog);
884	sh_error_handle((-1), FIL__, __LINE__, status, MSG_E_SUBGEN,
885	_("struct xfile size mismatch"),
886	_("getfiles"));
887	SH_MUTEX_UNLOCK(mutex_thread_nolog);
888	}
889	nxfiles = len / sizeof *xfiles;
890	}
891
892	static const char *
893	getprocname(pid_t pid)
894	{
895	static struct kinfo_proc proc;
896	size_t len;
897	int mib[4];
898
899	mib[0] = CTL_KERN;
900	mib[1] = KERN_PROC;
901	mib[2] = KERN_PROC_PID;
902	mib[3] = (int)pid;
903	len = sizeof proc;
904	if (sysctl(mib, 4, &proc, &len, NULL, 0) == -1) {
905	/* Do not warn if the process exits before we get its name. */
906	if (errno != ESRCH)
907	{
908	volatile int status = errno;
909	SH_MUTEX_LOCK(mutex_thread_nolog);
910	sh_error_handle(SH_ERR_WARN, FIL__, __LINE__, status, MSG_E_SUBGEN,
911	_("sysctl()"),
912	_("getfiles"));
913	SH_MUTEX_UNLOCK(mutex_thread_nolog);
914	}
915	return ("-");
916	}
917	return (proc.ki_ocomm);
918	}
919
920	char * sh_port2proc_query(int proto, struct sh_sockaddr * saddr, int sport,
921	unsigned long * pid, char * user, size_t userlen)
922	{
923	int n, hash;
924	struct xfile *xf;
925	struct in_addr * haddr = NULL;
926	struct in6_addr * haddr6 = NULL;
927	struct sock * s;
928	struct in6_addr anyaddr = IN6ADDR_ANY_INIT;
929
930	*pid = 0;
931
932	for (xf = xfiles, n = 0; n < nxfiles; ++n, ++xf) {
933
934	if (xf->xf_data == NULL)
935	continue;
936
937	/* Find the socket in sockhash[] that corresponds to it
938	*/
939	hash = (int)((uintptr_t)xf->xf_data % HASHSIZE);
940	for (s = sockhash[hash]; s != NULL; s = s->next)
941	if ((void *)s->socket == xf->xf_data)
942	break;
943
944	if (!s)
945	continue;
946
947	/* fprintf(stderr, "FIXME: %d %d, %d %d, %d %d, %d, %d\n", s->proto, proto,
948	s->family, AF_INET,
949	sport, ntohs(((struct sockaddr_in *)(&s->laddr))->sin_port),
950	(int) xf->xf_uid, (int)xf->xf_pid);
951	*/
952
953	if (s->proto != proto)
954	continue;
955
956	if (s->family != AF_INET && s->family != AF_INET6)
957	continue;
958
959	if (s->family == AF_INET &&
960	(sport != ntohs(((struct sockaddr_in *)(&s->laddr))->sin_port)))
961	continue;
962
963	if (s->family == AF_INET6 &&
964	(sport != ntohs(((struct sockaddr_in6 *)(&s->laddr))->sin6_port)))
965	continue;
966
967	if (s->family == AF_INET)
968	haddr = &((struct sockaddr_in *)(&s->laddr))->sin_addr;
969	if (s->family == AF_INET6)
970	haddr6 = &((struct sockaddr_in6 *)(&s->laddr))->sin6_addr;
971
972
973	/* fprintf(stderr, "FIXME: %s\n", inet_ntoa(haddr)); /
974	/* fprintf(stderr, "FIXME: %s\n", inet_ntoa(saddr)); /
975
976	if ( (s->family == AF_INET &&
977	(haddr->s_addr == (saddr->sin).sin_addr.s_addr \|\|
978	sh_ipvx_isany(saddr) \|\|
979	inet_lnaof(*haddr) == INADDR_ANY))
980	\|\|
981	(s->family == AF_INET6 &&
982	(0 == memcmp(haddr6->s6_addr, &((saddr->sin6).sin6_addr.s6_addr), 16) \|\|
983	0 == memcmp(haddr6->s6_addr, &(anyaddr.s6_addr), 16) \|\|
984	sh_ipvx_isany(saddr) ))
985	)
986	{
987	struct sock_store try;
988
989	*pid = xf->xf_pid;
990
991	try.pid = xf->xf_pid;
992	try.path = NULL;
993	try.user = NULL;
994	get_user_and_path (&try); /* Try to get info from /proc */
995
996	if (try.path == NULL)
997	{
998	extern char * sh_unix_getUIDname (int level, uid_t uid, char * out, size_t len);
999	char * tmp = sh_unix_getUIDname (SH_ERR_ALL, xf->xf_uid, user, userlen);
1000	if (!tmp)
1001	sl_snprintf (user, userlen, "%ld", (unsigned long) xf->xf_uid);
1002	return sh_util_strdup(getprocname(xf->xf_pid));
1003	}
1004	else
1005	{
1006	sl_strlcpy(user, try.user, userlen);
1007	SH_FREE(try.user);
1008	return try.path;
1009	}
1010	}
1011	}
1012	sl_strlcpy(user, "-", userlen);
1013	return sh_util_strdup("-");
1014	}
1015
1016	static void sockdel(struct sock * sock)
1017	{
1018	if (sock)
1019	{
1020	if (sock->next)
1021	sockdel(sock->next);
1022	SH_FREE(sock);
1023	}
1024	return;
1025	}
1026
1027	int sh_port2proc_prepare()
1028	{
1029	int i;
1030
1031	if (xfiles)
1032	{
1033	SH_FREE(xfiles);
1034	xfiles = NULL;
1035	}
1036
1037	for (i = 0; i < HASHSIZE; ++i)
1038	{
1039	sockdel(sockhash[i]);
1040	sockhash[i] = NULL;
1041	}
1042
1043	/* Inet connections
1044	*/
1045	gather_inet(IPPROTO_TCP);
1046	gather_inet(IPPROTO_UDP);
1047	gather_inet(IPPROTO_DIVERT);
1048
1049	getfiles();
1050
1051	return 0;
1052	}
1053
1054	void sh_port2proc_finish()
1055	{
1056	return;
1057	}
1058
1059	#else /* !defined(__linux__) && !defined(__FreeBSD__) */
1060
1061	#include "samhain.h"
1062	#include "sh_utils.h"
1063	#include "sh_ipvx.h"
1064
1065	char * sh_port2proc_query(int proto, struct sh_sockaddr * saddr, int sport,
1066	unsigned long * pid, char * user, size_t userlen)
1067	{
1068	(void) proto;
1069	(void) saddr;
1070	(void) sport;
1071
1072	*pid = 0;
1073
1074	sl_strlcpy(user, "-", userlen);
1075	return sh_util_strdup("-");
1076	}
1077
1078	int sh_port2proc_prepare()
1079	{
1080	return 0;
1081	}
1082
1083	void sh_port2proc_finish()
1084	{
1085	return;
1086	}
1087	#endif
1088
1089	#endif /* defined(SH_USE_PORTCHECK) */

Note: See TracBrowser for help on using the repository browser.

Download in other formats: