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-rw-r--r--extensions/Makefile.am3
-rw-r--r--extensions/libct_proto_udplite.c197
2 files changed, 199 insertions, 1 deletions
diff --git a/extensions/Makefile.am b/extensions/Makefile.am
index 7b48f05..70edf47 100644
--- a/extensions/Makefile.am
+++ b/extensions/Makefile.am
@@ -2,10 +2,11 @@ include $(top_srcdir)/Make_global.am
noinst_LTLIBRARIES = libct_proto_tcp.la libct_proto_udp.la \
libct_proto_icmp.la libct_proto_icmpv6.la \
- libct_proto_unknown.la
+ libct_proto_unknown.la libct_proto_udplite.la
libct_proto_tcp_la_SOURCES = libct_proto_tcp.c
libct_proto_udp_la_SOURCES = libct_proto_udp.c
+libct_proto_udplite_la_SOURCES = libct_proto_udplite.c
libct_proto_icmp_la_SOURCES = libct_proto_icmp.c
libct_proto_icmpv6_la_SOURCES = libct_proto_icmpv6.c
libct_proto_unknown_la_SOURCES = libct_proto_unknown.c
diff --git a/extensions/libct_proto_udplite.c b/extensions/libct_proto_udplite.c
new file mode 100644
index 0000000..bffd5fe
--- /dev/null
+++ b/extensions/libct_proto_udplite.c
@@ -0,0 +1,197 @@
+/*
+ * (C) 2009 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+#include <stdio.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <netinet/in.h> /* For htons */
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+
+#include "conntrack.h"
+
+#ifndef IPPROTO_UDPLITE
+#define IPPROTO_UDPLITE 136
+#endif
+
+enum {
+ CT_UDPLITE_ORIG_SPORT = (1 << 0),
+ CT_UDPLITE_ORIG_DPORT = (1 << 1),
+ CT_UDPLITE_REPL_SPORT = (1 << 2),
+ CT_UDPLITE_REPL_DPORT = (1 << 3),
+ CT_UDPLITE_MASK_SPORT = (1 << 4),
+ CT_UDPLITE_MASK_DPORT = (1 << 5),
+ CT_UDPLITE_EXPTUPLE_SPORT = (1 << 6),
+ CT_UDPLITE_EXPTUPLE_DPORT = (1 << 7)
+};
+
+#define UDP_OPT_MAX 11
+static struct option opts[UDP_OPT_MAX] = {
+ { .name = "orig-port-src", .has_arg = 1, .val = '1' },
+ { .name = "orig-port-dst", .has_arg = 1, .val = '2' },
+ { .name = "reply-port-src", .has_arg = 1, .val = '3' },
+ { .name = "reply-port-dst", .has_arg = 1, .val = '4' },
+ { .name = "mask-port-src", .has_arg = 1, .val = '5' },
+ { .name = "mask-port-dst", .has_arg = 1, .val = '6' },
+ { .name = "tuple-port-src", .has_arg = 1, .val = '7' },
+ { .name = "tuple-port-dst", .has_arg = 1, .val = '8' },
+ { .name = "sport", .has_arg = 1, .val = '1' },
+ { .name = "dport", .has_arg = 1, .val = '2' },
+ {0, 0, 0, 0}
+};
+
+static const char *udplite_optflags[UDP_OPT_MAX] = {
+ [0] = "sport",
+ [1] = "dport",
+ [2] = "reply-port-src",
+ [3] = "reply-port-dst",
+ [4] = "mask-port-src",
+ [5] = "mask-port-dst",
+ [6] = "tuple-port-src",
+ [7] = "tuple-port-dst"
+};
+
+static void help(void)
+{
+ fprintf(stdout, " --orig-port-src\t\toriginal source port\n");
+ fprintf(stdout, " --orig-port-dst\t\toriginal destination port\n");
+ fprintf(stdout, " --reply-port-src\t\treply source port\n");
+ fprintf(stdout, " --reply-port-dst\t\treply destination port\n");
+ fprintf(stdout, " --mask-port-src\t\tmask source port\n");
+ fprintf(stdout, " --mask-port-dst\t\tmask destination port\n");
+ fprintf(stdout, " --tuple-port-src\t\texpectation tuple src port\n");
+ fprintf(stdout, " --tuple-port-src\t\texpectation tuple dst port\n");
+}
+
+static char udplite_commands_v_options[NUMBER_OF_CMD][UDP_OPT_MAX] =
+{
+ /* 1 2 3 4 5 6 7 8 */
+/*CT_LIST*/ {2,2,2,2,0,0,0,0},
+/*CT_CREATE*/ {3,3,3,3,0,0,0,0},
+/*CT_UPDATE*/ {2,2,2,2,0,0,0,0},
+/*CT_DELETE*/ {2,2,2,2,0,0,0,0},
+/*CT_GET*/ {3,3,3,3,0,0,0,0},
+/*CT_FLUSH*/ {0,0,0,0,0,0,0,0},
+/*CT_EVENT*/ {2,2,2,2,0,0,0,0},
+/*CT_VERSION*/ {0,0,0,0,0,0,0,0},
+/*CT_HELP*/ {0,0,0,0,0,0,0,0},
+/*EXP_LIST*/ {0,0,0,0,0,0,0,0},
+/*EXP_CREATE*/ {1,1,1,1,1,1,1,1},
+/*EXP_DELETE*/ {1,1,1,1,0,0,0,0},
+/*EXP_GET*/ {1,1,1,1,0,0,0,0},
+/*EXP_FLUSH*/ {0,0,0,0,0,0,0,0},
+/*EXP_EVENT*/ {0,0,0,0,0,0,0,0},
+};
+
+static int parse_options(char c,
+ struct nf_conntrack *ct,
+ struct nf_conntrack *exptuple,
+ struct nf_conntrack *mask,
+ unsigned int *flags)
+{
+ switch(c) {
+ u_int16_t port;
+ case '1':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(ct, ATTR_ORIG_PORT_SRC, port);
+ nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_ORIG_SPORT;
+ break;
+ case '2':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(ct, ATTR_ORIG_PORT_DST, port);
+ nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_ORIG_DPORT;
+ break;
+ case '3':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(ct, ATTR_REPL_PORT_SRC, port);
+ nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_REPL_SPORT;
+ break;
+ case '4':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(ct, ATTR_REPL_PORT_DST, port);
+ nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_REPL_DPORT;
+ break;
+ case '5':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(mask, ATTR_ORIG_PORT_SRC, port);
+ nfct_set_attr_u8(mask, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_MASK_SPORT;
+ break;
+ case '6':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(mask, ATTR_ORIG_PORT_DST, port);
+ nfct_set_attr_u8(mask, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_MASK_DPORT;
+ break;
+ case '7':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(exptuple, ATTR_ORIG_PORT_SRC, port);
+ nfct_set_attr_u8(exptuple, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_EXPTUPLE_SPORT;
+ break;
+ case '8':
+ port = htons(atoi(optarg));
+ nfct_set_attr_u16(exptuple, ATTR_ORIG_PORT_DST, port);
+ nfct_set_attr_u8(exptuple, ATTR_ORIG_L4PROTO, IPPROTO_UDPLITE);
+ *flags |= CT_UDPLITE_EXPTUPLE_DPORT;
+ break;
+ }
+ return 1;
+}
+
+#define UDPLITE_VALID_FLAGS_MAX 2
+static unsigned int udplite_valid_flags[UDPLITE_VALID_FLAGS_MAX] = {
+ CT_UDPLITE_ORIG_SPORT | CT_UDPLITE_ORIG_DPORT,
+ CT_UDPLITE_REPL_SPORT | CT_UDPLITE_REPL_DPORT,
+};
+
+static void
+final_check(unsigned int flags, unsigned int cmd, struct nf_conntrack *ct)
+{
+ int ret, partial;
+
+ ret = generic_opt_check(flags, UDP_OPT_MAX,
+ udplite_commands_v_options[cmd],
+ udplite_optflags,
+ udplite_valid_flags, UDPLITE_VALID_FLAGS_MAX,
+ &partial);
+ if (!ret) {
+ switch(partial) {
+ case -1:
+ case 0:
+ exit_error(PARAMETER_PROBLEM, "you have to specify "
+ "`--sport' and "
+ "`--dport'");
+ break;
+ case 1:
+ exit_error(PARAMETER_PROBLEM, "you have to specify "
+ "`--reply-src-port' and "
+ "`--reply-dst-port'");
+ break;
+ }
+ }
+}
+
+static struct ctproto_handler udplite = {
+ .name = "udplite",
+ .protonum = IPPROTO_UDPLITE,
+ .parse_opts = parse_options,
+ .final_check = final_check,
+ .help = help,
+ .opts = opts,
+ .version = VERSION,
+};
+
+void register_udplite(void)
+{
+ register_proto(&udplite);
+}