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
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 #include <arpa/inet.h>
25 #include "tc_common.h"
26 #include <linux/tc_act/tc_mirred.h>
31 fprintf(stderr
, "Usage: mirred <DIRECTION> <ACTION> [index INDEX] <dev DEVICENAME>\n");
32 fprintf(stderr
, "where:\n");
33 fprintf(stderr
, "\tDIRECTION := <ingress | egress>\n");
34 fprintf(stderr
, "\tACTION := <mirror | redirect>\n");
35 fprintf(stderr
, "\tINDEX is the specific policy instance id\n");
36 fprintf(stderr
, "\tDEVICENAME is the devicename\n");
47 static const char *mirred_n2a(int action
)
50 case TCA_EGRESS_REDIR
:
51 return "Egress Redirect";
52 case TCA_INGRESS_REDIR
:
53 return "Ingress Redirect";
54 case TCA_EGRESS_MIRROR
:
55 return "Egress Mirror";
56 case TCA_INGRESS_MIRROR
:
57 return "Ingress Mirror";
64 parse_direction(struct action_util
*a
, int *argc_p
, char ***argv_p
,
65 int tca_id
, struct nlmsghdr
*n
)
69 char **argv
= *argv_p
;
70 int ok
= 0, iok
= 0, mirror
= 0, redir
= 0, ingress
= 0, egress
= 0;
71 struct tc_mirred p
= {};
73 char d
[IFNAMSIZ
] = {};
77 if (matches(*argv
, "action") == 0) {
79 } else if (!egress
&& matches(*argv
, "egress") == 0) {
82 fprintf(stderr
, "Can't have both egress and ingress\n");
88 } else if (!ingress
&& matches(*argv
, "ingress") == 0) {
91 fprintf(stderr
, "Can't have both ingress and egress\n");
99 if (matches(*argv
, "index") == 0) {
101 if (get_u32(&p
.index
, *argv
, 10)) {
102 fprintf(stderr
, "Illegal \"index\"\n");
112 fprintf(stderr
, "was expecting egress or ingress (%s)\n", *argv
);
115 } else if (!mirror
&& matches(*argv
, "mirror") == 0) {
118 fprintf(stderr
, "Can't have both mirror and redir\n");
121 p
.eaction
= egress
? TCA_EGRESS_MIRROR
:
123 p
.action
= TC_ACT_PIPE
;
125 } else if (!redir
&& matches(*argv
, "redirect") == 0) {
128 fprintf(stderr
, "Can't have both mirror and redir\n");
131 p
.eaction
= egress
? TCA_EGRESS_REDIR
:
133 p
.action
= TC_ACT_STOLEN
;
135 } else if ((redir
|| mirror
) && matches(*argv
, "dev") == 0) {
138 duparg("dev", *argv
);
140 strncpy(d
, *argv
, sizeof(d
)-1);
163 if ((idx
= ll_name_to_index(d
)) == 0) {
164 fprintf(stderr
, "Cannot find device \"%s\"\n", d
);
172 if (p
.eaction
== TCA_EGRESS_MIRROR
|| p
.eaction
== TCA_INGRESS_MIRROR
)
173 parse_action_control(&argc
, &argv
, &p
.action
, false);
176 if (iok
&& matches(*argv
, "index") == 0) {
177 fprintf(stderr
, "mirred: Illegal double index\n");
180 if (matches(*argv
, "index") == 0) {
182 if (get_u32(&p
.index
, *argv
, 10)) {
183 fprintf(stderr
, "mirred: Illegal \"index\"\n");
192 tail
= NLMSG_TAIL(n
);
193 addattr_l(n
, MAX_MSG
, tca_id
, NULL
, 0);
194 addattr_l(n
, MAX_MSG
, TCA_MIRRED_PARMS
, &p
, sizeof(p
));
195 tail
->rta_len
= (void *) NLMSG_TAIL(n
) - (void *) tail
;
204 parse_mirred(struct action_util
*a
, int *argc_p
, char ***argv_p
,
205 int tca_id
, struct nlmsghdr
*n
)
209 char **argv
= *argv_p
;
212 fprintf(stderr
, "mirred bad argument count %d\n", argc
);
216 if (matches(*argv
, "mirred") == 0) {
219 fprintf(stderr
, "mirred bad argument %s\n", *argv
);
224 if (matches(*argv
, "egress") == 0 || matches(*argv
, "ingress") == 0 ||
225 matches(*argv
, "index") == 0) {
226 int ret
= parse_direction(a
, &argc
, &argv
, tca_id
, n
);
234 } else if (matches(*argv
, "help") == 0) {
237 fprintf(stderr
, "mirred option not supported %s\n", *argv
);
245 print_mirred(struct action_util
*au
, FILE * f
, struct rtattr
*arg
)
248 struct rtattr
*tb
[TCA_MIRRED_MAX
+ 1];
254 parse_rtattr_nested(tb
, TCA_MIRRED_MAX
, arg
);
256 if (tb
[TCA_MIRRED_PARMS
] == NULL
) {
257 fprintf(f
, "[NULL mirred parameters]");
260 p
= RTA_DATA(tb
[TCA_MIRRED_PARMS
]);
267 if ((dev
= ll_index_to_name(p
->ifindex
)) == 0) {
268 fprintf(stderr
, "Cannot find device %d\n", p
->ifindex
);
272 fprintf(f
, "mirred (%s to device %s)", mirred_n2a(p
->eaction
), dev
);
273 print_action_control(f
, " ", p
->action
, "");
276 fprintf(f
, "\tindex %u ref %d bind %d", p
->index
, p
->refcnt
,
280 if (tb
[TCA_MIRRED_TM
]) {
281 struct tcf_t
*tm
= RTA_DATA(tb
[TCA_MIRRED_TM
]);
290 struct action_util mirred_action_util
= {
292 .parse_aopt
= parse_mirred
,
293 .print_aopt
= print_mirred
,