Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 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 | |
| 22 | static void explain(void) |
| 23 | { |
| 24 | fprintf(stderr, "Usage: vlan pop\n"); |
| 25 | fprintf(stderr, " vlan push [ protocol VLANPROTO ] id VLANID\n"); |
| 26 | fprintf(stderr, " VLANPROTO is one of 802.1Q or 802.1AD\n"); |
| 27 | fprintf(stderr, " with default: 802.1Q\n"); |
| 28 | } |
| 29 | |
| 30 | static void usage(void) |
| 31 | { |
| 32 | explain(); |
| 33 | exit(-1); |
| 34 | } |
| 35 | |
| 36 | static int parse_vlan(struct action_util *a, int *argc_p, char ***argv_p, |
| 37 | int tca_id, struct nlmsghdr *n) |
| 38 | { |
| 39 | int argc = *argc_p; |
| 40 | char **argv = *argv_p; |
| 41 | struct rtattr *tail; |
| 42 | int action = 0; |
| 43 | __u16 id; |
| 44 | int id_set = 0; |
| 45 | __u16 proto; |
| 46 | int proto_set = 0; |
| 47 | struct tc_vlan parm = { 0 }; |
| 48 | |
| 49 | if (matches(*argv, "vlan") != 0) |
| 50 | return -1; |
| 51 | |
| 52 | NEXT_ARG(); |
| 53 | |
| 54 | while (argc > 0) { |
| 55 | if (matches(*argv, "pop") == 0) { |
| 56 | if (action) { |
| 57 | fprintf(stderr, "unexpected \"%s\" - action already specified\n", |
| 58 | *argv); |
| 59 | explain(); |
| 60 | return -1; |
| 61 | } |
| 62 | action = TCA_VLAN_ACT_POP; |
| 63 | } else if (matches(*argv, "push") == 0) { |
| 64 | if (action) { |
| 65 | fprintf(stderr, "unexpected \"%s\" - action already specified\n", |
| 66 | *argv); |
| 67 | explain(); |
| 68 | return -1; |
| 69 | } |
| 70 | action = TCA_VLAN_ACT_PUSH; |
| 71 | } else if (matches(*argv, "id") == 0) { |
| 72 | if (action != TCA_VLAN_ACT_PUSH) { |
| 73 | fprintf(stderr, "\"%s\" is only valid for push\n", |
| 74 | *argv); |
| 75 | explain(); |
| 76 | return -1; |
| 77 | } |
| 78 | NEXT_ARG(); |
| 79 | if (get_u16(&id, *argv, 0)) |
| 80 | invarg("id is invalid", *argv); |
| 81 | id_set = 1; |
| 82 | } else if (matches(*argv, "protocol") == 0) { |
| 83 | if (action != TCA_VLAN_ACT_PUSH) { |
| 84 | fprintf(stderr, "\"%s\" is only valid for push\n", |
| 85 | *argv); |
| 86 | explain(); |
| 87 | return -1; |
| 88 | } |
| 89 | NEXT_ARG(); |
| 90 | if (ll_proto_a2n(&proto, *argv)) |
| 91 | invarg("protocol is invalid", *argv); |
| 92 | proto_set = 1; |
| 93 | } else if (matches(*argv, "help") == 0) { |
| 94 | usage(); |
| 95 | } else { |
| 96 | break; |
| 97 | } |
| 98 | argc--; |
| 99 | argv++; |
| 100 | } |
| 101 | |
| 102 | parm.action = TC_ACT_PIPE; |
| 103 | if (argc) { |
| 104 | if (matches(*argv, "reclassify") == 0) { |
| 105 | parm.action = TC_ACT_RECLASSIFY; |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 106 | argc--; |
| 107 | argv++; |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 108 | } else if (matches(*argv, "pipe") == 0) { |
| 109 | parm.action = TC_ACT_PIPE; |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 110 | argc--; |
| 111 | argv++; |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 112 | } else if (matches(*argv, "drop") == 0 || |
| 113 | matches(*argv, "shot") == 0) { |
| 114 | parm.action = TC_ACT_SHOT; |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 115 | argc--; |
| 116 | argv++; |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 117 | } else if (matches(*argv, "continue") == 0) { |
| 118 | parm.action = TC_ACT_UNSPEC; |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 119 | argc--; |
| 120 | argv++; |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 121 | } else if (matches(*argv, "pass") == 0) { |
| 122 | parm.action = TC_ACT_OK; |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 123 | argc--; |
| 124 | argv++; |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 125 | } |
| 126 | } |
| 127 | |
| 128 | if (argc) { |
| 129 | if (matches(*argv, "index") == 0) { |
| 130 | NEXT_ARG(); |
| 131 | if (get_u32(&parm.index, *argv, 10)) { |
| 132 | fprintf(stderr, "vlan: Illegal \"index\"\n"); |
| 133 | return -1; |
| 134 | } |
| 135 | argc--; |
| 136 | argv++; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | if (action == TCA_VLAN_ACT_PUSH && !id_set) { |
| 141 | fprintf(stderr, "id needs to be set for push\n"); |
| 142 | explain(); |
| 143 | return -1; |
| 144 | } |
| 145 | |
| 146 | parm.v_action = action; |
| 147 | tail = NLMSG_TAIL(n); |
| 148 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
| 149 | addattr_l(n, MAX_MSG, TCA_VLAN_PARMS, &parm, sizeof(parm)); |
| 150 | if (id_set) |
| 151 | addattr_l(n, MAX_MSG, TCA_VLAN_PUSH_VLAN_ID, &id, 2); |
| 152 | if (proto_set) { |
| 153 | if (proto != htons(ETH_P_8021Q) && |
| 154 | proto != htons(ETH_P_8021AD)) { |
| 155 | fprintf(stderr, "protocol not supported\n"); |
| 156 | explain(); |
| 157 | return -1; |
| 158 | } |
| 159 | |
| 160 | addattr_l(n, MAX_MSG, TCA_VLAN_PUSH_VLAN_PROTOCOL, &proto, 2); |
| 161 | } |
| 162 | tail->rta_len = (char *)NLMSG_TAIL(n) - (char *)tail; |
| 163 | |
| 164 | *argc_p = argc; |
| 165 | *argv_p = argv; |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int print_vlan(struct action_util *au, FILE *f, struct rtattr *arg) |
| 170 | { |
| 171 | SPRINT_BUF(b1); |
| 172 | struct rtattr *tb[TCA_VLAN_MAX + 1]; |
| 173 | __u16 val; |
| 174 | struct tc_vlan *parm; |
| 175 | |
| 176 | if (arg == NULL) |
| 177 | return -1; |
| 178 | |
| 179 | parse_rtattr_nested(tb, TCA_VLAN_MAX, arg); |
| 180 | |
| 181 | if (!tb[TCA_VLAN_PARMS]) { |
| 182 | fprintf(f, "[NULL vlan parameters]"); |
| 183 | return -1; |
| 184 | } |
| 185 | parm = RTA_DATA(tb[TCA_VLAN_PARMS]); |
| 186 | |
| 187 | fprintf(f, " vlan"); |
| 188 | |
| 189 | switch(parm->v_action) { |
| 190 | case TCA_VLAN_ACT_POP: |
| 191 | fprintf(f, " pop"); |
| 192 | break; |
| 193 | case TCA_VLAN_ACT_PUSH: |
| 194 | fprintf(f, " push"); |
| 195 | if (tb[TCA_VLAN_PUSH_VLAN_ID]) { |
| 196 | val = rta_getattr_u16(tb[TCA_VLAN_PUSH_VLAN_ID]); |
| 197 | fprintf(f, " id %u", val); |
| 198 | } |
| 199 | if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) { |
| 200 | fprintf(f, " protocol %s", |
| 201 | ll_proto_n2a(rta_getattr_u16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]), |
| 202 | b1, sizeof(b1))); |
| 203 | } |
| 204 | break; |
| 205 | } |
Jamal Hadi Salim | 564663b | 2015-01-11 09:31:30 -0500 | [diff] [blame] | 206 | fprintf(f, " %s", action_n2a(parm->action, b1, sizeof (b1))); |
Jiri Pirko | 8b1c021 | 2014-11-21 12:31:30 +0100 | [diff] [blame] | 207 | |
| 208 | fprintf(f, "\n\t index %d ref %d bind %d", parm->index, parm->refcnt, |
| 209 | parm->bindcnt); |
| 210 | |
| 211 | if (show_stats) { |
| 212 | if (tb[TCA_VLAN_TM]) { |
| 213 | struct tcf_t *tm = RTA_DATA(tb[TCA_VLAN_TM]); |
| 214 | print_tm(f, tm); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | fprintf(f, "\n "); |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | struct action_util vlan_action_util = { |
| 224 | .id = "vlan", |
| 225 | .parse_aopt = parse_vlan, |
| 226 | .print_aopt = print_vlan, |
| 227 | }; |