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8b1c0216 JP |
1 | /* |
2 | * m_vlan.c vlan manipulation module | |
3 | * | |
4 | * This program is free software; you can redistribute 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. | |
8 | * | |
9 | * Authors: Jiri Pirko <jiri@resnulli.us> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
15 | #include <string.h> | |
16 | #include <linux/if_ether.h> | |
17 | #include "utils.h" | |
18 | #include "rt_names.h" | |
19 | #include "tc_util.h" | |
20 | #include <linux/tc_act/tc_vlan.h> | |
21 | ||
4654173e SL |
22 | static const char * const action_names[] = { |
23 | [TCA_VLAN_ACT_POP] = "pop", | |
24 | [TCA_VLAN_ACT_PUSH] = "push", | |
25 | [TCA_VLAN_ACT_MODIFY] = "modify", | |
26 | }; | |
27 | ||
8b1c0216 JP |
28 | static void explain(void) |
29 | { | |
eb4bccf1 SH |
30 | fprintf(stderr, |
31 | "Usage: vlan pop\n" | |
32 | " vlan push [ protocol VLANPROTO ] id VLANID [ priority VLANPRIO ] [CONTROL]\n" | |
33 | " vlan modify [ protocol VLANPROTO ] id VLANID [ priority VLANPRIO ] [CONTROL]\n" | |
34 | " VLANPROTO is one of 802.1Q or 802.1AD\n" | |
35 | " with default: 802.1Q\n" | |
36 | " CONTROL := reclassify | pipe | drop | continue | pass |\n" | |
37 | " goto chain <CHAIN_INDEX>\n"); | |
8b1c0216 JP |
38 | } |
39 | ||
40 | static void usage(void) | |
41 | { | |
42 | explain(); | |
43 | exit(-1); | |
44 | } | |
45 | ||
4654173e SL |
46 | static bool has_push_attribs(int action) |
47 | { | |
48 | return action == TCA_VLAN_ACT_PUSH || action == TCA_VLAN_ACT_MODIFY; | |
49 | } | |
50 | ||
eb4bccf1 SH |
51 | static void unexpected(const char *arg) |
52 | { | |
53 | fprintf(stderr, | |
54 | "unexpected \"%s\" - action already specified\n", | |
55 | arg); | |
56 | explain(); | |
57 | } | |
58 | ||
8b1c0216 JP |
59 | static int parse_vlan(struct action_util *a, int *argc_p, char ***argv_p, |
60 | int tca_id, struct nlmsghdr *n) | |
61 | { | |
62 | int argc = *argc_p; | |
63 | char **argv = *argv_p; | |
64 | struct rtattr *tail; | |
65 | int action = 0; | |
66 | __u16 id; | |
67 | int id_set = 0; | |
68 | __u16 proto; | |
69 | int proto_set = 0; | |
0e43ed9d HHZ |
70 | __u8 prio; |
71 | int prio_set = 0; | |
e67aba55 | 72 | struct tc_vlan parm = {}; |
8b1c0216 JP |
73 | |
74 | if (matches(*argv, "vlan") != 0) | |
75 | return -1; | |
76 | ||
77 | NEXT_ARG(); | |
78 | ||
79 | while (argc > 0) { | |
80 | if (matches(*argv, "pop") == 0) { | |
81 | if (action) { | |
eb4bccf1 | 82 | unexpected(*argv); |
8b1c0216 JP |
83 | return -1; |
84 | } | |
85 | action = TCA_VLAN_ACT_POP; | |
86 | } else if (matches(*argv, "push") == 0) { | |
87 | if (action) { | |
eb4bccf1 | 88 | unexpected(*argv); |
8b1c0216 JP |
89 | return -1; |
90 | } | |
91 | action = TCA_VLAN_ACT_PUSH; | |
4654173e SL |
92 | } else if (matches(*argv, "modify") == 0) { |
93 | if (action) { | |
eb4bccf1 | 94 | unexpected(*argv); |
4654173e SL |
95 | return -1; |
96 | } | |
97 | action = TCA_VLAN_ACT_MODIFY; | |
8b1c0216 | 98 | } else if (matches(*argv, "id") == 0) { |
eb4bccf1 SH |
99 | if (!has_push_attribs(action)) |
100 | invarg("only valid for push/modify", *argv); | |
101 | ||
8b1c0216 JP |
102 | NEXT_ARG(); |
103 | if (get_u16(&id, *argv, 0)) | |
104 | invarg("id is invalid", *argv); | |
105 | id_set = 1; | |
106 | } else if (matches(*argv, "protocol") == 0) { | |
eb4bccf1 SH |
107 | if (!has_push_attribs(action)) |
108 | invarg("only valid for push/modify", *argv); | |
109 | ||
8b1c0216 JP |
110 | NEXT_ARG(); |
111 | if (ll_proto_a2n(&proto, *argv)) | |
112 | invarg("protocol is invalid", *argv); | |
113 | proto_set = 1; | |
0e43ed9d | 114 | } else if (matches(*argv, "priority") == 0) { |
eb4bccf1 SH |
115 | if (!has_push_attribs(action)) |
116 | invarg("only valid for push/modify", *argv); | |
117 | ||
0e43ed9d HHZ |
118 | NEXT_ARG(); |
119 | if (get_u8(&prio, *argv, 0) || (prio & ~0x7)) | |
120 | invarg("prio is invalid", *argv); | |
121 | prio_set = 1; | |
8b1c0216 JP |
122 | } else if (matches(*argv, "help") == 0) { |
123 | usage(); | |
124 | } else { | |
125 | break; | |
126 | } | |
127 | argc--; | |
128 | argv++; | |
129 | } | |
130 | ||
e67aba55 JP |
131 | parse_action_control_dflt(&argc, &argv, &parm.action, |
132 | false, TC_ACT_PIPE); | |
8b1c0216 JP |
133 | |
134 | if (argc) { | |
135 | if (matches(*argv, "index") == 0) { | |
136 | NEXT_ARG(); | |
137 | if (get_u32(&parm.index, *argv, 10)) { | |
138 | fprintf(stderr, "vlan: Illegal \"index\"\n"); | |
139 | return -1; | |
140 | } | |
141 | argc--; | |
142 | argv++; | |
143 | } | |
144 | } | |
145 | ||
4654173e SL |
146 | if (has_push_attribs(action) && !id_set) { |
147 | fprintf(stderr, "id needs to be set for %s\n", | |
148 | action_names[action]); | |
8b1c0216 JP |
149 | explain(); |
150 | return -1; | |
151 | } | |
152 | ||
153 | parm.v_action = action; | |
c14f9d92 | 154 | tail = addattr_nest(n, MAX_MSG, tca_id); |
8b1c0216 JP |
155 | addattr_l(n, MAX_MSG, TCA_VLAN_PARMS, &parm, sizeof(parm)); |
156 | if (id_set) | |
157 | addattr_l(n, MAX_MSG, TCA_VLAN_PUSH_VLAN_ID, &id, 2); | |
158 | if (proto_set) { | |
159 | if (proto != htons(ETH_P_8021Q) && | |
160 | proto != htons(ETH_P_8021AD)) { | |
161 | fprintf(stderr, "protocol not supported\n"); | |
162 | explain(); | |
163 | return -1; | |
164 | } | |
165 | ||
166 | addattr_l(n, MAX_MSG, TCA_VLAN_PUSH_VLAN_PROTOCOL, &proto, 2); | |
167 | } | |
0e43ed9d HHZ |
168 | if (prio_set) |
169 | addattr8(n, MAX_MSG, TCA_VLAN_PUSH_VLAN_PRIORITY, prio); | |
170 | ||
c14f9d92 | 171 | addattr_nest_end(n, tail); |
8b1c0216 JP |
172 | |
173 | *argc_p = argc; | |
174 | *argv_p = argv; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int print_vlan(struct action_util *au, FILE *f, struct rtattr *arg) | |
179 | { | |
180 | SPRINT_BUF(b1); | |
181 | struct rtattr *tb[TCA_VLAN_MAX + 1]; | |
182 | __u16 val; | |
183 | struct tc_vlan *parm; | |
184 | ||
185 | if (arg == NULL) | |
186 | return -1; | |
187 | ||
188 | parse_rtattr_nested(tb, TCA_VLAN_MAX, arg); | |
189 | ||
190 | if (!tb[TCA_VLAN_PARMS]) { | |
b021ee40 | 191 | print_string(PRINT_FP, NULL, "%s", "[NULL vlan parameters]"); |
8b1c0216 JP |
192 | return -1; |
193 | } | |
194 | parm = RTA_DATA(tb[TCA_VLAN_PARMS]); | |
195 | ||
b021ee40 | 196 | print_string(PRINT_ANY, "kind", "%s ", "vlan"); |
eb4bccf1 SH |
197 | print_string(PRINT_ANY, "vlan_action", " %s", |
198 | action_names[parm->v_action]); | |
8b1c0216 | 199 | |
32a121cb | 200 | switch (parm->v_action) { |
8b1c0216 | 201 | case TCA_VLAN_ACT_PUSH: |
4654173e | 202 | case TCA_VLAN_ACT_MODIFY: |
8b1c0216 JP |
203 | if (tb[TCA_VLAN_PUSH_VLAN_ID]) { |
204 | val = rta_getattr_u16(tb[TCA_VLAN_PUSH_VLAN_ID]); | |
b021ee40 | 205 | print_uint(PRINT_ANY, "id", " id %u", val); |
8b1c0216 JP |
206 | } |
207 | if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) { | |
eb4bccf1 SH |
208 | __u16 proto; |
209 | ||
210 | proto = rta_getattr_u16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]); | |
b021ee40 | 211 | print_string(PRINT_ANY, "protocol", " protocol %s", |
eb4bccf1 | 212 | ll_proto_n2a(proto, b1, sizeof(b1))); |
8b1c0216 | 213 | } |
0e43ed9d HHZ |
214 | if (tb[TCA_VLAN_PUSH_VLAN_PRIORITY]) { |
215 | val = rta_getattr_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]); | |
b021ee40 | 216 | print_uint(PRINT_ANY, "priority", " priority %u", val); |
0e43ed9d | 217 | } |
8b1c0216 JP |
218 | break; |
219 | } | |
e67aba55 | 220 | print_action_control(f, " ", parm->action, ""); |
8b1c0216 | 221 | |
b021ee40 JP |
222 | print_uint(PRINT_ANY, "index", "\n\t index %u", parm->index); |
223 | print_int(PRINT_ANY, "ref", " ref %d", parm->refcnt); | |
224 | print_int(PRINT_ANY, "bind", " bind %d", parm->bindcnt); | |
8b1c0216 JP |
225 | |
226 | if (show_stats) { | |
227 | if (tb[TCA_VLAN_TM]) { | |
228 | struct tcf_t *tm = RTA_DATA(tb[TCA_VLAN_TM]); | |
32a121cb | 229 | |
8b1c0216 JP |
230 | print_tm(f, tm); |
231 | } | |
232 | } | |
233 | ||
b021ee40 | 234 | print_string(PRINT_FP, NULL, "%s", "\n"); |
8b1c0216 JP |
235 | |
236 | return 0; | |
237 | } | |
238 | ||
239 | struct action_util vlan_action_util = { | |
240 | .id = "vlan", | |
241 | .parse_aopt = parse_vlan, | |
242 | .print_aopt = print_vlan, | |
243 | }; |