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d3e51122 JHS |
1 | /* |
2 | * m_ife.c IFE actions module | |
3 | * | |
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. | |
8 | * | |
9 | * Authors: J Hadi Salim (jhs@mojatatu.com) | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <netinet/in.h> | |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | #include <linux/netdevice.h> | |
23 | ||
24 | #include "rt_names.h" | |
25 | #include "utils.h" | |
26 | #include "tc_util.h" | |
27 | #include <linux/tc_act/tc_ife.h> | |
28 | ||
29 | static void ife_explain(void) | |
30 | { | |
31 | fprintf(stderr, | |
1b600f4b | 32 | "Usage:... ife {decode|encode} [{ALLOW|USE} ATTR] [dst DMAC] [src SMAC] [type TYPE] [CONTROL] [index INDEX]\n"); |
d3e51122 JHS |
33 | fprintf(stderr, |
34 | "\tALLOW := Encode direction. Allows encoding specified metadata\n" | |
35 | "\t\t e.g \"allow mark\"\n" | |
36 | "\tUSE := Encode direction. Enforce Static encoding of specified metadata\n" | |
37 | "\t\t e.g \"use mark 0x12\"\n" | |
1b600f4b | 38 | "\tATTR := mark (32-bit), prio (32-bit), tcindex (16-bit)\n" |
d3e51122 JHS |
39 | "\tDMAC := 6 byte Destination MAC address to encode\n" |
40 | "\tSMAC := optional 6 byte Source MAC address to encode\n" | |
41 | "\tTYPE := optional 16 bit ethertype to encode\n" | |
42 | "\tCONTROL := reclassify|pipe|drop|continue|ok\n" | |
43 | "\tINDEX := optional IFE table index value used\n"); | |
44 | fprintf(stderr, "encode is used for sending IFE packets\n"); | |
45 | fprintf(stderr, "decode is used for receiving IFE packets\n"); | |
46 | } | |
47 | ||
48 | static void ife_usage(void) | |
49 | { | |
50 | ife_explain(); | |
51 | exit(-1); | |
52 | } | |
53 | ||
54 | static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p, | |
55 | int tca_id, struct nlmsghdr *n) | |
56 | { | |
57 | int argc = *argc_p; | |
58 | char **argv = *argv_p; | |
59 | int ok = 0; | |
e67aba55 | 60 | struct tc_ife p = { 0 }; |
d3e51122 JHS |
61 | struct rtattr *tail; |
62 | struct rtattr *tail2; | |
63 | char dbuf[ETH_ALEN]; | |
64 | char sbuf[ETH_ALEN]; | |
65 | __u16 ife_type = 0; | |
bf338b60 | 66 | int user_type = 0; |
d3e51122 JHS |
67 | __u32 ife_prio = 0; |
68 | __u32 ife_prio_v = 0; | |
69 | __u32 ife_mark = 0; | |
70 | __u32 ife_mark_v = 0; | |
8da6ff35 JHS |
71 | __u16 ife_tcindex = 0; |
72 | __u16 ife_tcindex_v = 0; | |
d3e51122 JHS |
73 | char *daddr = NULL; |
74 | char *saddr = NULL; | |
75 | ||
d3e51122 JHS |
76 | if (argc <= 0) |
77 | return -1; | |
78 | ||
79 | while (argc > 0) { | |
80 | if (matches(*argv, "ife") == 0) { | |
81 | NEXT_ARG(); | |
82 | continue; | |
83 | } else if (matches(*argv, "decode") == 0) { | |
84 | p.flags = IFE_DECODE; /* readability aid */ | |
85 | ok++; | |
86 | } else if (matches(*argv, "encode") == 0) { | |
87 | p.flags = IFE_ENCODE; | |
88 | ok++; | |
89 | } else if (matches(*argv, "allow") == 0) { | |
90 | NEXT_ARG(); | |
91 | if (matches(*argv, "mark") == 0) { | |
92 | ife_mark = IFE_META_SKBMARK; | |
93 | } else if (matches(*argv, "prio") == 0) { | |
94 | ife_prio = IFE_META_PRIO; | |
8da6ff35 JHS |
95 | } else if (matches(*argv, "tcindex") == 0) { |
96 | ife_prio = IFE_META_TCINDEX; | |
d3e51122 JHS |
97 | } else { |
98 | fprintf(stderr, "Illegal meta define <%s>\n", | |
99 | *argv); | |
100 | return -1; | |
101 | } | |
102 | } else if (matches(*argv, "use") == 0) { | |
103 | NEXT_ARG(); | |
104 | if (matches(*argv, "mark") == 0) { | |
105 | NEXT_ARG(); | |
106 | if (get_u32(&ife_mark_v, *argv, 0)) | |
107 | invarg("ife mark val is invalid", | |
108 | *argv); | |
109 | } else if (matches(*argv, "prio") == 0) { | |
110 | NEXT_ARG(); | |
111 | if (get_u32(&ife_prio_v, *argv, 0)) | |
112 | invarg("ife prio val is invalid", | |
113 | *argv); | |
8da6ff35 JHS |
114 | } else if (matches(*argv, "tcindex") == 0) { |
115 | NEXT_ARG(); | |
116 | if (get_u16(&ife_tcindex_v, *argv, 0)) | |
117 | invarg("ife tcindex val is invalid", | |
118 | *argv); | |
d3e51122 JHS |
119 | } else { |
120 | fprintf(stderr, "Illegal meta use type <%s>\n", | |
121 | *argv); | |
122 | return -1; | |
123 | } | |
124 | } else if (matches(*argv, "type") == 0) { | |
125 | NEXT_ARG(); | |
126 | if (get_u16(&ife_type, *argv, 0)) | |
127 | invarg("ife type is invalid", *argv); | |
664f35aa | 128 | fprintf(stderr, "IFE type 0x%04X\n", ife_type); |
bf338b60 | 129 | user_type = 1; |
d3e51122 JHS |
130 | } else if (matches(*argv, "dst") == 0) { |
131 | NEXT_ARG(); | |
132 | daddr = *argv; | |
133 | if (sscanf(daddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", | |
134 | dbuf, dbuf + 1, dbuf + 2, | |
135 | dbuf + 3, dbuf + 4, dbuf + 5) != 6) { | |
136 | fprintf(stderr, "Invalid mac address %s\n", | |
137 | daddr); | |
138 | } | |
139 | fprintf(stderr, "dst MAC address <%s>\n", daddr); | |
140 | ||
141 | } else if (matches(*argv, "src") == 0) { | |
142 | NEXT_ARG(); | |
143 | saddr = *argv; | |
144 | if (sscanf(saddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", | |
145 | sbuf, sbuf + 1, sbuf + 2, | |
146 | sbuf + 3, sbuf + 4, sbuf + 5) != 6) { | |
147 | fprintf(stderr, "Invalid mac address %s\n", | |
148 | saddr); | |
149 | } | |
150 | fprintf(stderr, "src MAC address <%s>\n", saddr); | |
151 | } else if (matches(*argv, "help") == 0) { | |
152 | ife_usage(); | |
153 | } else { | |
154 | break; | |
155 | } | |
156 | ||
157 | argc--; | |
158 | argv++; | |
159 | } | |
160 | ||
e67aba55 | 161 | parse_action_control_dflt(&argc, &argv, &p.action, false, TC_ACT_PIPE); |
d3e51122 JHS |
162 | |
163 | if (argc) { | |
164 | if (matches(*argv, "index") == 0) { | |
165 | NEXT_ARG(); | |
9a56cca3 | 166 | if (get_u32(&p.index, *argv, 0)) { |
d3e51122 JHS |
167 | fprintf(stderr, "ife: Illegal \"index\"\n"); |
168 | return -1; | |
169 | } | |
a78a2dba | 170 | ok++; |
d3e51122 JHS |
171 | argc--; |
172 | argv++; | |
173 | } | |
174 | } | |
175 | ||
176 | if (!ok) { | |
177 | fprintf(stderr, "IFE requires decode/encode specified\n"); | |
178 | ife_usage(); | |
179 | } | |
180 | ||
181 | tail = NLMSG_TAIL(n); | |
182 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); | |
183 | addattr_l(n, MAX_MSG, TCA_IFE_PARMS, &p, sizeof(p)); | |
184 | ||
185 | if (!(p.flags & IFE_ENCODE)) | |
186 | goto skip_encode; | |
187 | ||
188 | if (daddr) | |
189 | addattr_l(n, MAX_MSG, TCA_IFE_DMAC, dbuf, ETH_ALEN); | |
bf338b60 | 190 | if (user_type) |
d3e51122 | 191 | addattr_l(n, MAX_MSG, TCA_IFE_TYPE, &ife_type, 2); |
38060de1 AA |
192 | else |
193 | fprintf(stderr, "IFE type 0x%04X\n", ETH_P_IFE); | |
d3e51122 JHS |
194 | if (saddr) |
195 | addattr_l(n, MAX_MSG, TCA_IFE_SMAC, sbuf, ETH_ALEN); | |
196 | ||
197 | tail2 = NLMSG_TAIL(n); | |
198 | addattr_l(n, MAX_MSG, TCA_IFE_METALST, NULL, 0); | |
199 | if (ife_mark || ife_mark_v) { | |
200 | if (ife_mark_v) | |
201 | addattr_l(n, MAX_MSG, IFE_META_SKBMARK, &ife_mark_v, 4); | |
202 | else | |
203 | addattr_l(n, MAX_MSG, IFE_META_SKBMARK, NULL, 0); | |
204 | } | |
205 | if (ife_prio || ife_prio_v) { | |
206 | if (ife_prio_v) | |
207 | addattr_l(n, MAX_MSG, IFE_META_PRIO, &ife_prio_v, 4); | |
208 | else | |
209 | addattr_l(n, MAX_MSG, IFE_META_PRIO, NULL, 0); | |
210 | } | |
8da6ff35 JHS |
211 | if (ife_tcindex || ife_tcindex_v) { |
212 | if (ife_tcindex_v) | |
213 | addattr_l(n, MAX_MSG, IFE_META_TCINDEX, &ife_tcindex_v, | |
214 | 2); | |
215 | else | |
216 | addattr_l(n, MAX_MSG, IFE_META_TCINDEX, NULL, 0); | |
217 | } | |
d3e51122 JHS |
218 | |
219 | tail2->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail2; | |
220 | ||
221 | skip_encode: | |
222 | tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail; | |
223 | ||
224 | *argc_p = argc; | |
225 | *argv_p = argv; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int print_ife(struct action_util *au, FILE *f, struct rtattr *arg) | |
230 | { | |
231 | struct tc_ife *p = NULL; | |
232 | struct rtattr *tb[TCA_IFE_MAX + 1]; | |
233 | __u16 ife_type = 0; | |
234 | __u32 mmark = 0; | |
8da6ff35 | 235 | __u16 mtcindex = 0; |
d3e51122 JHS |
236 | __u32 mprio = 0; |
237 | int has_optional = 0; | |
d3e51122 JHS |
238 | SPRINT_BUF(b2); |
239 | ||
240 | if (arg == NULL) | |
241 | return -1; | |
242 | ||
243 | parse_rtattr_nested(tb, TCA_IFE_MAX, arg); | |
244 | ||
245 | if (tb[TCA_IFE_PARMS] == NULL) { | |
246 | fprintf(f, "[NULL ife parameters]"); | |
247 | return -1; | |
248 | } | |
249 | p = RTA_DATA(tb[TCA_IFE_PARMS]); | |
250 | ||
e67aba55 JP |
251 | fprintf(f, "ife %s ", p->flags & IFE_ENCODE ? "encode" : "decode"); |
252 | print_action_control(f, "action ", p->action, " "); | |
d3e51122 JHS |
253 | |
254 | if (tb[TCA_IFE_TYPE]) { | |
255 | ife_type = rta_getattr_u16(tb[TCA_IFE_TYPE]); | |
256 | has_optional = 1; | |
257 | fprintf(f, "type 0x%X ", ife_type); | |
258 | } | |
259 | ||
260 | if (has_optional) | |
261 | fprintf(f, "\n\t "); | |
262 | ||
263 | if (tb[TCA_IFE_METALST]) { | |
264 | struct rtattr *metalist[IFE_META_MAX + 1]; | |
265 | int len = 0; | |
266 | ||
267 | parse_rtattr_nested(metalist, IFE_META_MAX, | |
268 | tb[TCA_IFE_METALST]); | |
269 | ||
270 | if (metalist[IFE_META_SKBMARK]) { | |
271 | len = RTA_PAYLOAD(metalist[IFE_META_SKBMARK]); | |
272 | if (len) { | |
273 | mmark = rta_getattr_u32(metalist[IFE_META_SKBMARK]); | |
57ee4430 | 274 | fprintf(f, "use mark %u ", mmark); |
d3e51122 JHS |
275 | } else |
276 | fprintf(f, "allow mark "); | |
277 | } | |
278 | ||
8da6ff35 JHS |
279 | if (metalist[IFE_META_TCINDEX]) { |
280 | len = RTA_PAYLOAD(metalist[IFE_META_TCINDEX]); | |
d3e51122 | 281 | if (len) { |
8da6ff35 JHS |
282 | mtcindex = |
283 | rta_getattr_u16(metalist[IFE_META_TCINDEX]); | |
284 | fprintf(f, "use tcindex %d ", mtcindex); | |
d3e51122 | 285 | } else |
8da6ff35 | 286 | fprintf(f, "allow tcindex "); |
d3e51122 JHS |
287 | } |
288 | ||
289 | if (metalist[IFE_META_PRIO]) { | |
290 | len = RTA_PAYLOAD(metalist[IFE_META_PRIO]); | |
291 | if (len) { | |
292 | mprio = rta_getattr_u32(metalist[IFE_META_PRIO]); | |
57ee4430 | 293 | fprintf(f, "use prio %u ", mprio); |
d3e51122 JHS |
294 | } else |
295 | fprintf(f, "allow prio "); | |
296 | } | |
297 | ||
298 | } | |
299 | ||
300 | if (tb[TCA_IFE_DMAC]) { | |
301 | has_optional = 1; | |
302 | fprintf(f, "dst %s ", | |
303 | ll_addr_n2a(RTA_DATA(tb[TCA_IFE_DMAC]), | |
304 | RTA_PAYLOAD(tb[TCA_IFE_DMAC]), 0, b2, | |
305 | sizeof(b2))); | |
306 | ||
307 | } | |
308 | ||
309 | if (tb[TCA_IFE_SMAC]) { | |
310 | has_optional = 1; | |
311 | fprintf(f, "src %s ", | |
312 | ll_addr_n2a(RTA_DATA(tb[TCA_IFE_SMAC]), | |
313 | RTA_PAYLOAD(tb[TCA_IFE_SMAC]), 0, b2, | |
314 | sizeof(b2))); | |
315 | } | |
316 | ||
53075318 | 317 | fprintf(f, "\n\t index %u ref %d bind %d", p->index, p->refcnt, |
d3e51122 JHS |
318 | p->bindcnt); |
319 | if (show_stats) { | |
320 | if (tb[TCA_IFE_TM]) { | |
321 | struct tcf_t *tm = RTA_DATA(tb[TCA_IFE_TM]); | |
322 | ||
323 | print_tm(f, tm); | |
324 | } | |
325 | } | |
326 | ||
327 | fprintf(f, "\n"); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | struct action_util ife_action_util = { | |
333 | .id = "ife", | |
334 | .parse_aopt = parse_ife, | |
335 | .print_aopt = print_ife, | |
336 | }; |