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-rw-r--r--tc/p_ip.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/tc/p_ip.c b/tc/p_ip.c
new file mode 100644
index 0000000..8eed9e8
--- /dev/null
+++ b/tc/p_ip.c
@@ -0,0 +1,161 @@
+/*
+ * p_ip.c packet editor: IPV4 header
+ *
+ * This program is free software; you can distribute 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.
+ *
+ * Authors: J Hadi Salim (hadi@cyberus.ca)
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include "utils.h"
+#include "tc_util.h"
+#include "m_pedit.h"
+
+static int
+parse_ip(int *argc_p, char ***argv_p,
+ struct m_pedit_sel *sel, struct m_pedit_key *tkey)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ tkey->htype = sel->extended ?
+ TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 :
+ TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ tkey->off = 12;
+ res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ tkey->off = 16;
+ res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0);
+ goto done;
+ }
+ /* jamal - look at these and make them either old or new
+ ** scheme given diffserv
+ ** don't forget the CE bit
+ */
+ if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) {
+ NEXT_ARG();
+ tkey->off = 1;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "ihl") == 0) {
+ NEXT_ARG();
+ tkey->off = 0;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x0f, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "ttl") == 0) {
+ NEXT_ARG();
+ tkey->off = 8;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, PEDIT_ALLOW_DEC);
+ goto done;
+ }
+ if (strcmp(*argv, "protocol") == 0) {
+ NEXT_ARG();
+ tkey->off = 9;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
+ goto done;
+ }
+ /* jamal - fix this */
+ if (matches(*argv, "precedence") == 0) {
+ NEXT_ARG();
+ tkey->off = 1;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
+ goto done;
+ }
+ /* jamal - validate this at some point */
+ if (strcmp(*argv, "nofrag") == 0) {
+ NEXT_ARG();
+ tkey->off = 6;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x3F, sel, tkey, 0);
+ goto done;
+ }
+ /* jamal - validate this at some point */
+ if (strcmp(*argv, "firstfrag") == 0) {
+ NEXT_ARG();
+ tkey->off = 6;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x1F, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "ce") == 0) {
+ NEXT_ARG();
+ tkey->off = 6;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x80, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "df") == 0) {
+ NEXT_ARG();
+ tkey->off = 6;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x40, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "mf") == 0) {
+ NEXT_ARG();
+ tkey->off = 6;
+ res = parse_cmd(&argc, &argv, 1, TU32, 0x20, sel, tkey, 0);
+ goto done;
+ }
+
+ if (sel->extended)
+ return -1; /* fields located outside IP header should be
+ * addressed using the relevant header type in
+ * extended pedit kABI
+ */
+
+ if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ tkey->off = 22;
+ res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ tkey->off = 20;
+ res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_type") == 0) {
+ NEXT_ARG();
+ tkey->off = 20;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_code") == 0) {
+ NEXT_ARG();
+ tkey->off = 20;
+ res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0);
+ goto done;
+ }
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+struct m_pedit_util p_pedit_ip = {
+ .id = "ip",
+ .parse_peopt = parse_ip,
+};