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 static const 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
,
66 int tca_id
, struct nlmsghdr
*n
)
70 char **argv
= *argv_p
;
71 int ok
= 0, iok
= 0, mirror
= 0, redir
= 0;
72 struct tc_mirred p
= {};
78 if (matches(*argv
, "action") == 0) {
80 } else if (matches(*argv
, "egress") == 0) {
86 if (matches(*argv
, "index") == 0) {
88 if (get_u32(&p
.index
, *argv
, 10)) {
89 fprintf(stderr
, "Illegal \"index\"\n");
99 fprintf(stderr
, "was expecting egress (%s)\n", *argv
);
102 } else if (!mirror
&& matches(*argv
, "mirror") == 0) {
105 fprintf(stderr
, "Can't have both mirror and redir\n");
108 p
.eaction
= TCA_EGRESS_MIRROR
;
109 p
.action
= TC_ACT_PIPE
;
111 } else if (!redir
&& matches(*argv
, "redirect") == 0) {
114 fprintf(stderr
, "Can't have both mirror and redir\n");
117 p
.eaction
= TCA_EGRESS_REDIR
;
118 p
.action
= TC_ACT_STOLEN
;
120 } else if ((redir
|| mirror
) && matches(*argv
, "dev") == 0) {
123 duparg("dev", *argv
);
125 strncpy(d
, *argv
, sizeof(d
)-1);
148 if ((idx
= ll_name_to_index(d
)) == 0) {
149 fprintf(stderr
, "Cannot find device \"%s\"\n", d
);
157 if (argc
&& p
.eaction
== TCA_EGRESS_MIRROR
158 && !action_a2n(*argv
, &p
.action
, false))
162 if (iok
&& matches(*argv
, "index") == 0) {
163 fprintf(stderr
, "mirred: Illegal double index\n");
166 if (matches(*argv
, "index") == 0) {
168 if (get_u32(&p
.index
, *argv
, 10)) {
169 fprintf(stderr
, "mirred: Illegal \"index\"\n");
178 tail
= NLMSG_TAIL(n
);
179 addattr_l(n
, MAX_MSG
, tca_id
, NULL
, 0);
180 addattr_l(n
, MAX_MSG
, TCA_MIRRED_PARMS
, &p
, sizeof(p
));
181 tail
->rta_len
= (void *) NLMSG_TAIL(n
) - (void *) tail
;
190 parse_mirred(struct action_util
*a
, int *argc_p
, char ***argv_p
,
191 int tca_id
, struct nlmsghdr
*n
)
195 char **argv
= *argv_p
;
198 fprintf(stderr
, "mirred bad argument count %d\n", argc
);
202 if (matches(*argv
, "mirred") == 0) {
205 fprintf(stderr
, "mirred bad argument %s\n", *argv
);
210 if (matches(*argv
, "egress") == 0 || matches(*argv
, "index") == 0) {
211 int ret
= parse_egress(a
, &argc
, &argv
, tca_id
, n
);
219 } else if (matches(*argv
, "ingress") == 0) {
220 fprintf(stderr
, "mirred ingress not supported at the moment\n");
221 } else if (matches(*argv
, "help") == 0) {
224 fprintf(stderr
, "mirred option not supported %s\n", *argv
);
232 print_mirred(struct action_util
*au
, FILE * f
, struct rtattr
*arg
)
235 struct rtattr
*tb
[TCA_MIRRED_MAX
+ 1];
241 parse_rtattr_nested(tb
, TCA_MIRRED_MAX
, arg
);
243 if (tb
[TCA_MIRRED_PARMS
] == NULL
) {
244 fprintf(f
, "[NULL mirred parameters]");
247 p
= RTA_DATA(tb
[TCA_MIRRED_PARMS
]);
254 if ((dev
= ll_index_to_name(p
->ifindex
)) == 0) {
255 fprintf(stderr
, "Cannot find device %d\n", p
->ifindex
);
259 fprintf(f
, "mirred (%s to device %s) %s",
260 mirred_n2a(p
->eaction
), dev
, action_n2a(p
->action
));
263 fprintf(f
, "\tindex %d ref %d bind %d", p
->index
, p
->refcnt
, p
->bindcnt
);
266 if (tb
[TCA_MIRRED_TM
]) {
267 struct tcf_t
*tm
= RTA_DATA(tb
[TCA_MIRRED_TM
]);
276 struct action_util mirred_action_util
= {
278 .parse_aopt
= parse_mirred
,
279 .print_aopt
= print_mirred
,