2 * m_egress.c ingress/egress packet mirror/redir actions module
4 * This program is free software; you can distribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: J Hadi Salim (hadi@cyberus.ca)
11 * TODO: Add Ingress support
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <arpa/inet.h>
26 #include "tc_common.h"
27 #include <linux/tc_act/tc_mirred.h>
32 fprintf(stderr, "Usage: mirred <DIRECTION> <ACTION> [index INDEX] <dev DEVICENAME> \n");
33 fprintf(stderr, "where: \n");
34 fprintf(stderr, "\tDIRECTION := <ingress | egress>\n");
35 fprintf(stderr, "\tACTION := <mirror | redirect>\n");
36 fprintf(stderr, "\tINDEX is the specific policy instance id\n");
37 fprintf(stderr, "\tDEVICENAME is the devicename \n");
48 char *mirred_n2a(int action)
51 case TCA_EGRESS_REDIR:
52 return "Egress Redirect";
53 case TCA_INGRESS_REDIR:
54 return "Ingress Redirect";
55 case TCA_EGRESS_MIRROR:
56 return "Egress Mirror";
57 case TCA_INGRESS_MIRROR:
58 return "Ingress Mirror";
65 parse_egress(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
69 char **argv = *argv_p;
70 int ok = 0, iok = 0, mirror=0,redir=0;
75 memset(d,0,sizeof(d)-1);
76 memset(&p,0,sizeof(struct tc_mirred));
80 if (matches(*argv, "action") == 0) {
82 } else if (matches(*argv, "egress") == 0) {
88 if (matches(*argv, "index") == 0) {
90 if (get_u32(&p.index, *argv, 10)) {
91 fprintf(stderr, "Illegal \"index\"\n");
101 fprintf(stderr, "was expecting egress (%s)\n", *argv);
104 } else if (!mirror && matches(*argv, "mirror") == 0) {
107 fprintf(stderr, "Cant have both mirror and redir\n");
110 p.eaction = TCA_EGRESS_MIRROR;
111 p.action = TC_ACT_PIPE;
113 } else if (!redir && matches(*argv, "redirect") == 0) {
116 fprintf(stderr, "Cant have both mirror and redir\n");
119 p.eaction = TCA_EGRESS_REDIR;
120 p.action = TC_ACT_STOLEN;
122 } else if ((redir || mirror) && matches(*argv, "dev") == 0) {
125 duparg("dev", *argv);
127 strncpy(d, *argv, sizeof(d)-1);
149 if ((idx = ll_name_to_index(d)) == 0) {
150 fprintf(stderr, "Cannot find device \"%s\"\n", d);
158 if (argc && p.eaction == TCA_EGRESS_MIRROR) {
160 if (matches(*argv, "reclassify") == 0) {
161 p.action = TC_POLICE_RECLASSIFY;
163 } else if (matches(*argv, "pipe") == 0) {
164 p.action = TC_POLICE_PIPE;
166 } else if (matches(*argv, "drop") == 0 ||
167 matches(*argv, "shot") == 0) {
168 p.action = TC_POLICE_SHOT;
170 } else if (matches(*argv, "continue") == 0) {
171 p.action = TC_POLICE_UNSPEC;
173 } else if (matches(*argv, "pass") == 0) {
174 p.action = TC_POLICE_OK;
181 if (iok && matches(*argv, "index") == 0) {
182 fprintf(stderr, "mirred: Illegal double index\n");
185 if (matches(*argv, "index") == 0) {
187 if (get_u32(&p.index, *argv, 10)) {
188 fprintf(stderr, "mirred: Illegal \"index\"\n");
197 tail = NLMSG_TAIL(n);
198 addattr_l(n, MAX_MSG, tca_id, NULL, 0);
199 addattr_l(n, MAX_MSG, TCA_MIRRED_PARMS, &p, sizeof (p));
200 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
209 parse_mirred(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
213 char **argv = *argv_p;
216 fprintf(stderr,"mirred bad arguement count %d\n", argc);
220 if (matches(*argv, "mirred") == 0) {
223 fprintf(stderr,"mirred bad arguement %s\n", *argv);
228 if (matches(*argv, "egress") == 0 || matches(*argv, "index") == 0) {
229 int ret = parse_egress(a, &argc, &argv, tca_id, n);
236 } else if (matches(*argv, "ingress") == 0) {
237 fprintf(stderr,"mirred ingress not supported at the moment\n");
238 } else if (matches(*argv, "help") == 0) {
241 fprintf(stderr,"mirred option not supported %s\n", *argv);
249 print_mirred(struct action_util *au,FILE * f, struct rtattr *arg)
252 struct rtattr *tb[TCA_MIRRED_MAX + 1];
259 parse_rtattr_nested(tb, TCA_MIRRED_MAX, arg);
261 if (tb[TCA_MIRRED_PARMS] == NULL) {
262 fprintf(f, "[NULL mirred parameters]");
265 p = RTA_DATA(tb[TCA_MIRRED_PARMS]);
272 if ((dev = ll_index_to_name(p->ifindex)) == 0) {
273 fprintf(stderr, "Cannot find device %d\n", p->ifindex);
277 fprintf(f, "mirred (%s to device %s) %s", mirred_n2a(p->eaction), dev,action_n2a(p->action, b1, sizeof (b1)));
280 fprintf(f, "\tindex %d ref %d bind %d",p->index,p->refcnt,p->bindcnt);
283 if (tb[TCA_MIRRED_TM]) {
284 struct tcf_t *tm = RTA_DATA(tb[TCA_MIRRED_TM]);
292 struct action_util mirred_action_util = {
294 .parse_aopt = parse_mirred,
295 .print_aopt = print_mirred,