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: Herbert Xu <herbert@gondor.apana.org.au>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
24 #include <linux/tc_act/tc_nat.h>
29 fprintf(stderr, "Usage: ... nat NAT\n"
30 "NAT := DIRECTION OLD NEW\n"
31 "DIRECTION := { ingress | egress }\n"
44 parse_nat_args(int *argc_p, char ***argv_p,struct tc_nat *sel)
47 char **argv = *argv_p;
53 if (matches(*argv, "egress") == 0)
54 sel->flags |= TCA_NAT_FLAG_EGRESS;
55 else if (matches(*argv, "ingress") != 0)
60 if (get_prefix_1(&addr, *argv, AF_INET))
63 sel->old_addr = addr.data[0];
64 sel->mask = htonl(~0u << (32 - addr.bitlen));
68 if (get_prefix_1(&addr, *argv, AF_INET))
71 sel->new_addr = addr.data[0];
85 parse_nat(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n)
90 char **argv = *argv_p;
94 memset(&sel, 0, sizeof(sel));
97 if (matches(*argv, "nat") == 0) {
99 if (parse_nat_args(&argc, &argv, &sel)) {
100 fprintf(stderr, "Illegal nat construct (%s) \n",
107 } else if (matches(*argv, "help") == 0) {
121 if (matches(*argv, "reclassify") == 0) {
122 sel.action = TC_ACT_RECLASSIFY;
125 } else if (matches(*argv, "pipe") == 0) {
126 sel.action = TC_ACT_PIPE;
129 } else if (matches(*argv, "drop") == 0 ||
130 matches(*argv, "shot") == 0) {
131 sel.action = TC_ACT_SHOT;
134 } else if (matches(*argv, "continue") == 0) {
135 sel.action = TC_ACT_UNSPEC;
138 } else if (matches(*argv, "pass") == 0) {
139 sel.action = TC_ACT_OK;
146 if (matches(*argv, "index") == 0) {
148 if (get_u32(&sel.index, *argv, 10)) {
149 fprintf(stderr, "Pedit: Illegal \"index\"\n");
157 tail = NLMSG_TAIL(n);
158 addattr_l(n, MAX_MSG, tca_id, NULL, 0);
159 addattr_l(n, MAX_MSG, TCA_NAT_PARMS, &sel, sizeof(sel));
160 tail->rta_len = (char *)NLMSG_TAIL(n) - (char *)tail;
168 print_nat(struct action_util *au,FILE * f, struct rtattr *arg)
171 struct rtattr *tb[TCA_NAT_MAX + 1];
180 parse_rtattr_nested(tb, TCA_NAT_MAX, arg);
182 if (tb[TCA_NAT_PARMS] == NULL) {
183 fprintf(f, "[NULL nat parameters]");
186 sel = RTA_DATA(tb[TCA_NAT_PARMS]);
188 len = ffs(sel->mask);
189 len = len ? 33 - len : 0;
191 fprintf(f, " nat %s %s/%d %s %s", sel->flags & TCA_NAT_FLAG_EGRESS ?
192 "egress" : "ingress",
193 format_host(AF_INET, 4, &sel->old_addr, buf1, sizeof(buf1)),
195 format_host(AF_INET, 4, &sel->new_addr, buf2, sizeof(buf2)),
196 action_n2a(sel->action, buf3, sizeof (buf3)));
199 if (tb[TCA_NAT_TM]) {
200 struct tcf_t *tm = RTA_DATA(tb[TCA_NAT_TM]);
208 struct action_util nat_action_util = {
210 .parse_aopt = parse_nat,
211 .print_aopt = print_nat,