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-rw-r--r--extensions/Makefile.am4
-rw-r--r--extensions/libct_proto_icmp.c2
-rw-r--r--extensions/libct_proto_icmp.man10
-rw-r--r--extensions/libct_proto_sctp.c160
-rw-r--r--extensions/libct_proto_tcp.c18
-rw-r--r--extensions/libct_proto_tcp.man16
-rw-r--r--extensions/libct_proto_udp.man13
7 files changed, 214 insertions, 9 deletions
diff --git a/extensions/Makefile.am b/extensions/Makefile.am
index ab29a6d..ecd3a91 100644
--- a/extensions/Makefile.am
+++ b/extensions/Makefile.am
@@ -8,8 +8,10 @@ INCLUDES=-I../include -I/lib/modules/$(shell (uname -r))/build/include
CFLAGS=-fPIC -Wall
LIBS=
-lib_LTLIBRARIES = libct_proto_tcp.la libct_proto_udp.la libct_proto_icmp.la
+lib_LTLIBRARIES = libct_proto_tcp.la libct_proto_udp.la libct_proto_icmp.la \
+ libct_proto_sctp.la
libct_proto_tcp_la_SOURCES = libct_proto_tcp.c
libct_proto_udp_la_SOURCES = libct_proto_udp.c
libct_proto_icmp_la_SOURCES = libct_proto_icmp.c
+libct_proto_sctp_la_SOURCES = libct_proto_sctp.c
diff --git a/extensions/libct_proto_icmp.c b/extensions/libct_proto_icmp.c
index 43ffa30..6a2db92 100644
--- a/extensions/libct_proto_icmp.c
+++ b/extensions/libct_proto_icmp.c
@@ -81,7 +81,7 @@ int final_check(unsigned int flags)
void print_tuple(struct ip_conntrack_tuple *t)
{
- fprintf(stdout, "type=%d code=%d id=%d", t->dst.u.icmp.type,
+ fprintf(stdout, "type=%d code=%d id=%d ", t->dst.u.icmp.type,
t->dst.u.icmp.code,
t->src.u.icmp.id);
}
diff --git a/extensions/libct_proto_icmp.man b/extensions/libct_proto_icmp.man
new file mode 100644
index 0000000..3b860d0
--- /dev/null
+++ b/extensions/libct_proto_icmp.man
@@ -0,0 +1,10 @@
+This module matches on ICMP-specific fields.
+.TP
+.BI "--icmp-type " "TYPE"
+ICMP Type. Has to be specified numerically.
+.TP
+.BI "--icmp-code " "CODE"
+ICMP Code. Has to be specified numerically.
+.TP
+.BI "--icmp-id " "ID"
+ICMP Id. Has to be specified numerically.
diff --git a/extensions/libct_proto_sctp.c b/extensions/libct_proto_sctp.c
new file mode 100644
index 0000000..b84c2ba
--- /dev/null
+++ b/extensions/libct_proto_sctp.c
@@ -0,0 +1,160 @@
+/*
+ * (C) 2005 by Harald Welte <lafoorge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation
+ *
+ */
+#include <stdio.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netinet/in.h> /* For htons */
+#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include "libct_proto.h"
+
+static struct option opts[] = {
+ {"orig-port-src", 1, 0, '1'},
+ {"orig-port-dst", 1, 0, '2'},
+ {"reply-port-src", 1, 0, '3'},
+ {"reply-port-dst", 1, 0, '4'},
+ {"state", 1, 0, '5'},
+ {0, 0, 0, 0}
+};
+
+enum sctp_param_flags {
+ ORIG_SPORT_BIT = 0,
+ ORIG_SPORT = (1 << ORIG_SPORT_BIT),
+
+ ORIG_DPORT_BIT = 1,
+ ORIG_DPORT = (1 << ORIG_DPORT_BIT),
+
+ REPL_SPORT_BIT = 2,
+ REPL_SPORT = (1 << REPL_SPORT_BIT),
+
+ REPL_DPORT_BIT = 3,
+ REPL_DPORT = (1 << REPL_DPORT_BIT),
+
+ STATE_BIT = 4,
+ STATE = (1 << STATE_BIT)
+};
+
+static const char *states[] = {
+ "NONE",
+ "CLOSED",
+ "COOKIE_WAIT",
+ "COOKIE_ECHOED",
+ "ESTABLISHED",
+ "SHUTDOWN_SENT",
+ "SHUTDOWN_RECV",
+ "SHUTDOWN_ACK_SENT",
+};
+
+static void help()
+{
+ fprintf(stdout, "--orig-port-src original source port\n");
+ fprintf(stdout, "--orig-port-dst original destination port\n");
+ fprintf(stdout, "--reply-port-src reply source port\n");
+ fprintf(stdout, "--reply-port-dst reply destination port\n");
+ fprintf(stdout, "--state SCTP state, eg. ESTABLISHED\n");
+}
+
+static int parse(char c, char *argv[],
+ struct ip_conntrack_tuple *orig,
+ struct ip_conntrack_tuple *reply,
+ union ip_conntrack_proto *proto,
+ unsigned int *flags)
+{
+ switch(c) {
+ case '1':
+ if (optarg) {
+ orig->src.u.sctp.port = htons(atoi(optarg));
+ *flags |= ORIG_SPORT;
+ }
+ break;
+ case '2':
+ if (optarg) {
+ orig->dst.u.sctp.port = htons(atoi(optarg));
+ *flags |= ORIG_DPORT;
+ }
+ break;
+ case '3':
+ if (optarg) {
+ reply->src.u.sctp.port = htons(atoi(optarg));
+ *flags |= REPL_SPORT;
+ }
+ break;
+ case '4':
+ if (optarg) {
+ reply->dst.u.sctp.port = htons(atoi(optarg));
+ *flags |= REPL_DPORT;
+ }
+ break;
+ case '5':
+ if (optarg) {
+ int i;
+ for (i=0; i<10; i++) {
+ if (strcmp(optarg, states[i]) == 0) {
+ proto->sctp.state = i;
+ break;
+ }
+ }
+ if (i == 10) {
+ printf("doh?\n");
+ return 0;
+ }
+ }
+ break;
+ }
+ return 1;
+}
+
+static int final_check(unsigned int flags)
+{
+ if ((flags & ORIG_SPORT) && (flags & ORIG_DPORT))
+ return 1;
+ else if ((flags & REPL_SPORT) && (flags & REPL_DPORT))
+ return 1;
+
+ return 0;
+}
+
+static void print_tuple(struct ip_conntrack_tuple *t)
+{
+ fprintf(stdout, "sport=%d dport=%d ", ntohs(t->src.u.sctp.port),
+ ntohs(t->dst.u.sctp.port));
+}
+
+static void print_proto(union ip_conntrack_proto *proto)
+{
+ if (proto->sctp.state > sizeof(states)/sizeof(char *))
+ fprintf(stdout, "[%u] ", proto->sctp.state);
+ else
+ fprintf(stdout, "[%s] ", states[proto->sctp.state]);
+}
+
+static struct ctproto_handler sctp = {
+ .name = "sctp",
+ .protonum = 132,
+ .parse = parse,
+ .print_tuple = print_tuple,
+ .print_proto = print_proto,
+ .final_check = final_check,
+ .help = help,
+ .opts = opts,
+};
+
+void __attribute__ ((constructor)) init(void);
+void __attribute__ ((destructor)) fini(void);
+
+void init(void)
+{
+ register_proto(&sctp);
+}
+
+void fini(void)
+{
+ unregister_proto(&sctp);
+}
diff --git a/extensions/libct_proto_tcp.c b/extensions/libct_proto_tcp.c
index 4cddf53..45ee29b 100644
--- a/extensions/libct_proto_tcp.c
+++ b/extensions/libct_proto_tcp.c
@@ -10,6 +10,7 @@
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
+#include <string.h>
#include <netinet/in.h> /* For htons */
#include <linux/netfilter_ipv4/ip_conntrack_tuple.h>
#include <linux/netfilter_ipv4/ip_conntrack.h>
@@ -54,7 +55,7 @@ static const char *states[] = {
"LISTEN"
};
-void help()
+static void help()
{
fprintf(stdout, "--orig-port-src original source port\n");
fprintf(stdout, "--orig-port-dst original destination port\n");
@@ -63,7 +64,7 @@ void help()
fprintf(stdout, "--state TCP state, fe. ESTABLISHED\n");
}
-int parse(char c, char *argv[],
+static int parse(char c, char *argv[],
struct ip_conntrack_tuple *orig,
struct ip_conntrack_tuple *reply,
union ip_conntrack_proto *proto,
@@ -113,7 +114,7 @@ int parse(char c, char *argv[],
return 1;
}
-int final_check(unsigned int flags)
+static int final_check(unsigned int flags)
{
if ((flags & ORIG_SPORT) && (flags & ORIG_DPORT))
return 1;
@@ -123,15 +124,18 @@ int final_check(unsigned int flags)
return 0;
}
-void print_tuple(struct ip_conntrack_tuple *t)
+static void print_tuple(struct ip_conntrack_tuple *t)
{
fprintf(stdout, "sport=%d dport=%d ", ntohs(t->src.u.tcp.port),
ntohs(t->dst.u.tcp.port));
}
-void print_proto(union ip_conntrack_proto *proto)
+static void print_proto(union ip_conntrack_proto *proto)
{
- fprintf(stdout, "[%s] ", states[proto->tcp.state]);
+ if (proto->tcp.state > sizeof(states)/sizeof(char *))
+ fprintf(stdout, "[%u] ", states[proto->tcp.state]);
+ else
+ fprintf(stdout, "[%s] ", states[proto->tcp.state]);
}
static struct ctproto_handler tcp = {
@@ -142,7 +146,7 @@ static struct ctproto_handler tcp = {
.print_proto = print_proto,
.final_check = final_check,
.help = help,
- .opts = opts
+ .opts = opts,
};
void __attribute__ ((constructor)) init(void);
diff --git a/extensions/libct_proto_tcp.man b/extensions/libct_proto_tcp.man
new file mode 100644
index 0000000..41783f8
--- /dev/null
+++ b/extensions/libct_proto_tcp.man
@@ -0,0 +1,16 @@
+This module matches on TCP-specific fields.
+.TP
+.BI "--orig-port-src " "PORT"
+Source port in original direction
+.TP
+.BI "--orig-port-dst " "PORT"
+Destination port in original direction
+.TP
+.BI "--reply-port-src " "PORT"
+Source port in reply direction
+.TP
+.BI "--reply-port-dst " "PORT"
+Destination port in reply direction
+.TP
+.BI "--state " "[NONE|SYN_SENT|SYN_RECV|ESTABLISHED|FIN_WAIT|CLOSE_WAIT|LAST_ACK|TIME_WAIT|CLOSE|LISTEN]"
+TCP state
diff --git a/extensions/libct_proto_udp.man b/extensions/libct_proto_udp.man
new file mode 100644
index 0000000..c67fedf
--- /dev/null
+++ b/extensions/libct_proto_udp.man
@@ -0,0 +1,13 @@
+This module matches on UDP-specific fields.
+.TP
+.BI "--orig-port-src " "PORT"
+Source port in original direction
+.TP
+.BI "--orig-port-dst " "PORT"
+Destination port in original direction
+.TP
+.BI "--reply-port-src " "PORT"
+Source port in reply direction
+.TP
+.BI "--reply-port-dst " "PORT"
+Destination port in reply direction
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 17:43:08 +0000