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-rw-r--r--ChangeLog20
-rw-r--r--configure.in2
-rw-r--r--src/conntrack.c289
3 files changed, 233 insertions, 78 deletions
diff --git a/ChangeLog b/ChangeLog
index e3cf6c0..5dd73a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,20 +1,24 @@
version 0.9.7 (yet unreleased)
------------------------------
-Pablo Neira Ayuso <pablo@netfilter.org>:
o remove .svn directory from make distcheck tarballs (reported by B.Benjamini)
o fix minor compilation issue in amd64 with gcc4.3 (reported by Daniel Schepler)
-o fix asymmetric path support (reported by Gary Richards)
-o improve netlink overrun handling
o update manpages with the new URL: http://conntrack-tools.netfilter.org
+
+= conntrack =
+o fix minor compilation warning (Krzysztof Oledzki)
+o add ICMPv6 (-p icmpv6) support (Krzysztof Oledzki)
+o distinguish between invalid (unknown) and empty proto (Krzysztof Oledzki)
o simplify parameter-handling code
-o check for missing source/address IP/ports
+o check for missing source/address IP/ports in creation and get operations
+o way more flexible conntrack updates and deletions
+o fix NAT filtering via --src-nat and --dst-nat (reported by K.Oledzki)
+o show display counters to stderr
o minor cleanups
-Krzysztof Oledzki <ole@ans.pl>:
-o fix minor compilation warning
-o add ICMPv6 (-p icmpv6) support
-o add possibility to distinguish between invalid (unknown) and empty proto
+= conntrackd =
+o fix asymmetric path support (reported by Gary Richards)
+o improve netlink overrun handling
version 0.9.6 (2008/03/08)
------------------------------
diff --git a/configure.in b/configure.in
index a98a324..92a0389 100644
--- a/configure.in
+++ b/configure.in
@@ -18,7 +18,7 @@ esac
dnl Dependencies
LIBNFNETLINK_REQUIRED=0.0.32
-LIBNETFILTER_CONNTRACK_REQUIRED=0.0.89
+LIBNETFILTER_CONNTRACK_REQUIRED=0.0.91
PKG_CHECK_MODULES(LIBNFNETLINK, libnfnetlink >= $LIBNFNETLINK_REQUIRED,,
AC_MSG_ERROR(Cannot find libnfnetlink >= $LIBNFNETLINK_REQUIRED))
diff --git a/src/conntrack.c b/src/conntrack.c
index 4fa5c9a..f4dfec7 100644
--- a/src/conntrack.c
+++ b/src/conntrack.c
@@ -1,5 +1,5 @@
/*
- * (C) 2005-2007 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -31,7 +31,8 @@
* Remove remaints of "-A"
* 2007-04-22 Pablo Neira Ayuso <pablo@netfilter.org>:
* Ported to the new libnetfilter_conntrack API
- *
+ * 2008-04-13 Pablo Neira Ayuso <pablo@netfilter.org>:
+ * Way more flexible update and delete operations
*/
#include "conntrack.h"
@@ -103,7 +104,7 @@ static struct option original_opts[] = {
#define OPTION_OFFSET 256
-static struct nfct_handle *cth;
+static struct nfct_handle *cth, *ith;
static struct option *opts = original_opts;
static unsigned int global_option_offset = 0;
@@ -122,8 +123,8 @@ static char commands_v_options[NUMBER_OF_CMD][NUMBER_OF_OPT] =
/* s d r q p t u z e [ ] { } a m i f n g o c */
/*CT_LIST*/ {2,2,2,2,2,0,0,2,0,0,0,0,0,0,2,2,2,2,2,2,2},
/*CT_CREATE*/ {2,2,2,2,1,1,1,0,0,0,0,0,0,2,2,0,0,2,2,0,2},
-/*CT_UPDATE*/ {2,2,2,2,1,2,2,0,0,0,0,0,0,0,2,2,0,0,0,0,2},
-/*CT_DELETE*/ {2,2,2,2,2,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0},
+/*CT_UPDATE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,2},
+/*CT_DELETE*/ {2,2,2,2,2,2,2,0,0,0,0,0,0,0,2,2,2,2,2,2,2},
/*CT_GET*/ {2,2,2,2,1,0,0,0,0,0,0,0,0,0,0,2,0,0,0,2,0},
/*CT_FLUSH*/ {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
/*CT_EVENT*/ {2,2,2,2,2,0,0,0,2,0,0,0,0,0,2,0,0,2,2,2,2},
@@ -499,14 +500,6 @@ nat_parse(char *arg, int portok, struct nf_conntrack *obj, int type)
nfct_set_attr_u32(obj, ATTR_DNAT_IPV4, parse.v4);
}
-static void __attribute__((noreturn))
-event_sighandler(int s)
-{
- fprintf(stdout, "Now closing conntrack event dumping...\n");
- nfct_close(cth);
- exit(0);
-}
-
static const char usage_commands[] =
"Commands:\n"
" -L [table] [options]\t\tList conntrack or expectation table\n"
@@ -566,82 +559,207 @@ usage(char *prog)
static unsigned int output_mask;
+static int ignore_nat(const struct nf_conntrack *obj,
+ const struct nf_conntrack *ct)
+{
+ uint32_t ip;
+
+ if (options & CT_OPT_SRC_NAT && options & CT_OPT_DST_NAT) {
+ if (!nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT) &&
+ !nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT))
+ return 1;
+
+ if (nfct_attr_is_set(obj, ATTR_SNAT_IPV4)) {
+ ip = nfct_get_attr_u32(obj, ATTR_SNAT_IPV4);
+ if (ip != nfct_get_attr_u32(ct, ATTR_REPL_IPV4_DST))
+ return 1;
+ }
+
+ if (nfct_attr_is_set(obj, ATTR_DNAT_IPV4)) {
+ ip = nfct_get_attr_u32(obj, ATTR_DNAT_IPV4);
+ if (ip != nfct_get_attr_u32(ct, ATTR_REPL_IPV4_SRC))
+ return 1;
+ }
+ } else if (options & CT_OPT_SRC_NAT) {
+ if (!nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT))
+ return 1;
+
+ if (nfct_attr_is_set(obj, ATTR_SNAT_IPV4)) {
+ ip = nfct_get_attr_u32(obj, ATTR_SNAT_IPV4);
+ if (ip != nfct_get_attr_u32(ct, ATTR_REPL_IPV4_DST))
+ return 1;
+ }
+ } else if (options & CT_OPT_DST_NAT) {
+ if (!nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT))
+ return 1;
+
+ if (nfct_attr_is_set(obj, ATTR_DNAT_IPV4)) {
+ ip = nfct_get_attr_u32(obj, ATTR_DNAT_IPV4);
+ if (ip != nfct_get_attr_u32(ct, ATTR_REPL_IPV4_SRC))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int events_counter;
+
+static void __attribute__((noreturn))
+event_sighandler(int s)
+{
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow events has been shown.\n", events_counter);
+ nfct_close(cth);
+ exit(0);
+}
+
static int event_cb(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
char buf[1024];
struct nf_conntrack *obj = data;
- unsigned int output_type = NFCT_O_DEFAULT;
- unsigned int output_flags = 0;
+ unsigned int op_type = NFCT_O_DEFAULT;
+ unsigned int op_flags = 0;
- if (options & CT_OPT_SRC_NAT && options & CT_OPT_DST_NAT) {
- if (!nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT) &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT))
- return NFCT_CB_CONTINUE;
- } else if (options & CT_OPT_SRC_NAT &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT)) {
- return NFCT_CB_CONTINUE;
- } else if (options & CT_OPT_DST_NAT &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT)) {
+ if (ignore_nat(obj, ct))
return NFCT_CB_CONTINUE;
- }
- if (options & CT_COMPARISON && !nfct_compare(obj, ct))
+ if (options & CT_COMPARISON && !nfct_cmp(obj, ct, NFCT_CMP_ALL))
return NFCT_CB_CONTINUE;
if (output_mask & _O_XML)
- output_type = NFCT_O_XML;
+ op_type = NFCT_O_XML;
if (output_mask & _O_EXT)
- output_flags = NFCT_OF_SHOW_LAYER3;
+ op_flags = NFCT_OF_SHOW_LAYER3;
if (output_mask & _O_TMS) {
if (!(output_mask & _O_XML)) {
struct timeval tv;
gettimeofday(&tv, NULL);
printf("[%-8ld.%-6ld]\t", tv.tv_sec, tv.tv_usec);
} else
- output_flags |= NFCT_OF_TIME;
+ op_flags |= NFCT_OF_TIME;
}
- nfct_snprintf(buf, 1024, ct, type, output_type, output_flags);
+ nfct_snprintf(buf, 1024, ct, type, op_type, op_flags);
printf("%s\n", buf);
fflush(stdout);
+ events_counter++;
+
return NFCT_CB_CONTINUE;
}
+static int list_counter;
+
static int dump_cb(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
char buf[1024];
struct nf_conntrack *obj = data;
- unsigned int output_type = NFCT_O_DEFAULT;
- unsigned int output_flags = 0;
+ unsigned int op_type = NFCT_O_DEFAULT;
+ unsigned int op_flags = 0;
- if (options & CT_OPT_SRC_NAT && options & CT_OPT_DST_NAT) {
- if (!nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT) &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT))
- return NFCT_CB_CONTINUE;
- } else if (options & CT_OPT_SRC_NAT &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_SNAT)) {
- return NFCT_CB_CONTINUE;
- } else if (options & CT_OPT_DST_NAT &&
- !nfct_getobjopt(ct, NFCT_GOPT_IS_DNAT)) {
+ if (ignore_nat(obj, ct))
return NFCT_CB_CONTINUE;
- }
- if (options & CT_COMPARISON && !nfct_compare(obj, ct))
+ if (options & CT_COMPARISON && !nfct_cmp(obj, ct, NFCT_CMP_ALL))
return NFCT_CB_CONTINUE;
if (output_mask & _O_XML)
- output_type = NFCT_O_XML;
+ op_type = NFCT_O_XML;
if (output_mask & _O_EXT)
- output_flags = NFCT_OF_SHOW_LAYER3;
+ op_flags = NFCT_OF_SHOW_LAYER3;
- nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, output_type, output_flags);
+ nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, op_type, op_flags);
printf("%s\n", buf);
+ list_counter++;
+
+ return NFCT_CB_CONTINUE;
+}
+
+static int delete_counter;
+
+static int delete_cb(enum nf_conntrack_msg_type type,
+ struct nf_conntrack *ct,
+ void *data)
+{
+ int res;
+ char buf[1024];
+ struct nf_conntrack *obj = data;
+ unsigned int op_type = NFCT_O_DEFAULT;
+ unsigned int op_flags = 0;
+
+ if (ignore_nat(obj, ct))
+ return NFCT_CB_CONTINUE;
+
+ if (options & CT_COMPARISON && !nfct_cmp(obj, ct, NFCT_CMP_ALL))
+ return NFCT_CB_CONTINUE;
+
+ res = nfct_query(ith, NFCT_Q_DESTROY, ct);
+ if (res < 0)
+ exit_error(OTHER_PROBLEM,
+ "Operation failed: %s",
+ err2str(errno, CT_DELETE));
+
+ if (output_mask & _O_XML)
+ op_type = NFCT_O_XML;
+ if (output_mask & _O_EXT)
+ op_flags = NFCT_OF_SHOW_LAYER3;
+
+ nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, op_type, op_flags);
+ printf("%s\n", buf);
+
+ delete_counter++;
+
+ return NFCT_CB_CONTINUE;
+}
+
+static int update_counter;
+
+static int update_cb(enum nf_conntrack_msg_type type,
+ struct nf_conntrack *ct,
+ void *data)
+{
+ int res;
+ char buf[1024];
+ struct nf_conntrack *obj = data;
+ char __tmp[nfct_maxsize()];
+ struct nf_conntrack *tmp = (struct nf_conntrack *) (void *)__tmp;
+ unsigned int op_type = NFCT_O_DEFAULT;
+ unsigned int op_flags = 0;
+
+ memcpy(tmp, obj, sizeof(__tmp));
+
+ if (ignore_nat(tmp, ct))
+ return NFCT_CB_CONTINUE;
+
+ if (options & CT_OPT_ORIG && !nfct_cmp(tmp, ct, NFCT_CMP_ORIG))
+ return NFCT_CB_CONTINUE;
+ if (options & CT_OPT_REPL && !nfct_cmp(tmp, ct, NFCT_CMP_REPL))
+ return NFCT_CB_CONTINUE;
+
+ nfct_copy(tmp, ct, NFCT_CP_ORIG);
+
+ res = nfct_query(ith, NFCT_Q_UPDATE, tmp);
+ if (res < 0)
+ exit_error(OTHER_PROBLEM,
+ "Operation failed: %s",
+ err2str(errno, CT_UPDATE));
+
+ if (output_mask & _O_XML)
+ op_type = NFCT_O_XML;
+ if (output_mask & _O_EXT)
+ op_flags = NFCT_OF_SHOW_LAYER3;
+
+ nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, op_type, op_flags);
+ printf("%s\n", buf);
+
+ update_counter++;
+
return NFCT_CB_CONTINUE;
}
@@ -665,6 +783,7 @@ static const int cmd2type[][2] = {
['D'] = { CT_DELETE, EXP_DELETE },
['G'] = { CT_GET, EXP_GET },
['F'] = { CT_FLUSH, EXP_FLUSH },
+ ['E'] = { CT_EVENT, EXP_EVENT },
['V'] = { CT_VERSION, CT_VERSION },
['h'] = { CT_HELP, CT_HELP },
};
@@ -714,7 +833,8 @@ int main(int argc, char *argv[])
char __exptuple[nfct_maxsize()];
char __mask[nfct_maxsize()];
struct nf_conntrack *obj = (struct nf_conntrack *)(void*) __obj;
- struct nf_conntrack *exptuple = (struct nf_conntrack *)(void*) __exptuple;
+ struct nf_conntrack *exptuple =
+ (struct nf_conntrack *)(void*) __exptuple;
struct nf_conntrack *mask = (struct nf_conntrack *)(void*) __mask;
char __exp[nfexp_maxsize()];
struct nf_expect *exp = (struct nf_expect *)(void*) __exp;
@@ -869,15 +989,24 @@ int main(int argc, char *argv[])
options |= CT_OPT_ZERO;
break;
case 'n':
- case 'g':
- if (!optarg)
- exit_error(PARAMETER_PROBLEM,
- "-%c requires an IP", c);
+ case 'g': {
+ char *tmp = NULL;
options |= opt2type[c];
+
+ if (optarg)
+ continue;
+ else if (optind < argc && argv[optind][0] != '-'
+ && argv[optind][0] != '!')
+ tmp = argv[optind++];
+
+ if (tmp == NULL)
+ continue;
+
set_family(&family, AF_INET);
- nat_parse(optarg, 1, obj, opt2type[c]);
+ nat_parse(tmp, 1, obj, opt2type[c]);
break;
+ }
case 'm':
case 'c':
options |= opt2type[c];
@@ -930,7 +1059,7 @@ int main(int argc, char *argv[])
commands_v_options[cmd],
optflags);
- if (command & (CT_CREATE|CT_UPDATE|CT_DELETE|CT_GET) &&
+ if (command & (CT_CREATE|CT_GET) &&
!((options & CT_OPT_ORIG_SRC && options & CT_OPT_ORIG_DST) ||
(options & CT_OPT_REPL_SRC && options & CT_OPT_REPL_DST)))
exit_error(PARAMETER_PROBLEM, "missing IP address");
@@ -958,6 +1087,10 @@ int main(int argc, char *argv[])
res = nfct_query(cth, NFCT_Q_DUMP, &family);
nfct_close(cth);
+
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow entries has been shown.\n",
+ list_counter);
break;
case EXP_LIST:
@@ -982,6 +1115,9 @@ int main(int argc, char *argv[])
res = nfct_query(cth, NFCT_Q_CREATE, obj);
nfct_close(cth);
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow entry has been created.\n",
+ res == -1 ? 0 : 1);
break;
case EXP_CREATE:
@@ -998,29 +1134,38 @@ int main(int argc, char *argv[])
break;
case CT_UPDATE:
- if ((options & CT_OPT_ORIG) && !(options & CT_OPT_REPL))
- nfct_setobjopt(obj, NFCT_SOPT_SETUP_REPLY);
- else if (!(options & CT_OPT_ORIG) && (options & CT_OPT_REPL))
- nfct_setobjopt(obj, NFCT_SOPT_SETUP_ORIGINAL);
-
cth = nfct_open(CONNTRACK, 0);
- if (!cth)
+ /* internal handler for delete_cb, otherwise we hit EILSEQ */
+ ith = nfct_open(CONNTRACK, 0);
+ if (!cth || !ith)
exit_error(OTHER_PROBLEM, "Can't open handler");
- res = nfct_query(cth, NFCT_Q_UPDATE, obj);
+ nfct_callback_register(cth, NFCT_T_ALL, update_cb, obj);
+
+ res = nfct_query(cth, NFCT_Q_DUMP, &family);
+ nfct_close(ith);
nfct_close(cth);
+
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow entries has been updated.\n",
+ update_counter);
break;
case CT_DELETE:
- if (!(options & CT_OPT_ORIG) && !(options & CT_OPT_REPL))
- exit_error(PARAMETER_PROBLEM, "Can't kill conntracks "
- "just by its ID");
cth = nfct_open(CONNTRACK, 0);
- if (!cth)
+ ith = nfct_open(CONNTRACK, 0);
+ if (!cth || !ith)
exit_error(OTHER_PROBLEM, "Can't open handler");
- res = nfct_query(cth, NFCT_Q_DESTROY, obj);
+ nfct_callback_register(cth, NFCT_T_ALL, delete_cb, obj);
+
+ res = nfct_query(cth, NFCT_Q_DUMP, &family);
+ nfct_close(ith);
nfct_close(cth);
+
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow entries has been deleted.\n",
+ delete_counter);
break;
case EXP_DELETE:
@@ -1042,6 +1187,9 @@ int main(int argc, char *argv[])
nfct_callback_register(cth, NFCT_T_ALL, dump_cb, obj);
res = nfct_query(cth, NFCT_Q_GET, obj);
nfct_close(cth);
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr, "%d flow entry has been shown.\n",
+ res == -1 ? 0 : 1);
break;
case EXP_GET:
@@ -1062,6 +1210,8 @@ int main(int argc, char *argv[])
exit_error(OTHER_PROBLEM, "Can't open handler");
res = nfct_query(cth, NFCT_Q_FLUSH, &family);
nfct_close(cth);
+ fprintf(stderr, "%s v%s: ", PROGNAME, VERSION);
+ fprintf(stderr,"connection tracking table has been emptied.\n");
break;
case EXP_FLUSH:
@@ -1081,6 +1231,7 @@ int main(int argc, char *argv[])
if (!cth)
exit_error(OTHER_PROBLEM, "Can't open handler");
signal(SIGINT, event_sighandler);
+ signal(SIGTERM, event_sighandler);
nfct_callback_register(cth, NFCT_T_ALL, event_cb, obj);
res = nfct_catch(cth);
nfct_close(cth);
@@ -1091,6 +1242,7 @@ int main(int argc, char *argv[])
if (!cth)
exit_error(OTHER_PROBLEM, "Can't open handler");
signal(SIGINT, event_sighandler);
+ signal(SIGTERM, event_sighandler);
nfexp_callback_register(cth, NFCT_T_ALL, dump_exp_cb, NULL);
res = nfexp_catch(cth);
nfct_close(cth);
@@ -1115,10 +1267,9 @@ int main(int argc, char *argv[])
global_option_offset = 0;
}
- if (res < 0) {
- fprintf(stderr, "Operation failed: %s\n", err2str(errno, command));
- exit(OTHER_PROBLEM);
- }
+ if (res < 0)
+ exit_error(OTHER_PROBLEM, "Operation failed: %s",
+ err2str(errno, command));
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 13:02:54 +0000