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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> | |
d3e51122 JHS |
16 | #include <fcntl.h> |
17 | #include <sys/socket.h> | |
18 | #include <netinet/in.h> | |
19 | #include <arpa/inet.h> | |
20 | #include <string.h> | |
21 | #include <linux/netdevice.h> | |
22 | ||
23 | #include "rt_names.h" | |
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include <linux/tc_act/tc_ife.h> | |
27 | ||
28 | static void ife_explain(void) | |
29 | { | |
30 | fprintf(stderr, | |
1b600f4b | 31 | "Usage:... ife {decode|encode} [{ALLOW|USE} ATTR] [dst DMAC] [src SMAC] [type TYPE] [CONTROL] [index INDEX]\n"); |
d3e51122 JHS |
32 | fprintf(stderr, |
33 | "\tALLOW := Encode direction. Allows encoding specified metadata\n" | |
34 | "\t\t e.g \"allow mark\"\n" | |
35 | "\tUSE := Encode direction. Enforce Static encoding of specified metadata\n" | |
36 | "\t\t e.g \"use mark 0x12\"\n" | |
1b600f4b | 37 | "\tATTR := mark (32-bit), prio (32-bit), tcindex (16-bit)\n" |
d3e51122 JHS |
38 | "\tDMAC := 6 byte Destination MAC address to encode\n" |
39 | "\tSMAC := optional 6 byte Source MAC address to encode\n" | |
40 | "\tTYPE := optional 16 bit ethertype to encode\n" | |
41 | "\tCONTROL := reclassify|pipe|drop|continue|ok\n" | |
42 | "\tINDEX := optional IFE table index value used\n"); | |
43 | fprintf(stderr, "encode is used for sending IFE packets\n"); | |
44 | fprintf(stderr, "decode is used for receiving IFE packets\n"); | |
45 | } | |
46 | ||
47 | static void ife_usage(void) | |
48 | { | |
49 | ife_explain(); | |
50 | exit(-1); | |
51 | } | |
52 | ||
53 | static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p, | |
54 | int tca_id, struct nlmsghdr *n) | |
55 | { | |
56 | int argc = *argc_p; | |
57 | char **argv = *argv_p; | |
58 | int ok = 0; | |
e67aba55 | 59 | struct tc_ife p = { 0 }; |
d3e51122 JHS |
60 | struct rtattr *tail; |
61 | struct rtattr *tail2; | |
62 | char dbuf[ETH_ALEN]; | |
63 | char sbuf[ETH_ALEN]; | |
64 | __u16 ife_type = 0; | |
bf338b60 | 65 | int user_type = 0; |
d3e51122 JHS |
66 | __u32 ife_prio = 0; |
67 | __u32 ife_prio_v = 0; | |
68 | __u32 ife_mark = 0; | |
69 | __u32 ife_mark_v = 0; | |
8da6ff35 JHS |
70 | __u16 ife_tcindex = 0; |
71 | __u16 ife_tcindex_v = 0; | |
d3e51122 JHS |
72 | char *daddr = NULL; |
73 | char *saddr = NULL; | |
74 | ||
d3e51122 JHS |
75 | if (argc <= 0) |
76 | return -1; | |
77 | ||
78 | while (argc > 0) { | |
79 | if (matches(*argv, "ife") == 0) { | |
80 | NEXT_ARG(); | |
81 | continue; | |
82 | } else if (matches(*argv, "decode") == 0) { | |
83 | p.flags = IFE_DECODE; /* readability aid */ | |
84 | ok++; | |
85 | } else if (matches(*argv, "encode") == 0) { | |
86 | p.flags = IFE_ENCODE; | |
87 | ok++; | |
88 | } else if (matches(*argv, "allow") == 0) { | |
89 | NEXT_ARG(); | |
90 | if (matches(*argv, "mark") == 0) { | |
91 | ife_mark = IFE_META_SKBMARK; | |
92 | } else if (matches(*argv, "prio") == 0) { | |
93 | ife_prio = IFE_META_PRIO; | |
8da6ff35 | 94 | } else if (matches(*argv, "tcindex") == 0) { |
25a24934 | 95 | ife_tcindex = IFE_META_TCINDEX; |
d3e51122 JHS |
96 | } else { |
97 | fprintf(stderr, "Illegal meta define <%s>\n", | |
98 | *argv); | |
99 | return -1; | |
100 | } | |
101 | } else if (matches(*argv, "use") == 0) { | |
102 | NEXT_ARG(); | |
103 | if (matches(*argv, "mark") == 0) { | |
104 | NEXT_ARG(); | |
105 | if (get_u32(&ife_mark_v, *argv, 0)) | |
106 | invarg("ife mark val is invalid", | |
107 | *argv); | |
108 | } else if (matches(*argv, "prio") == 0) { | |
109 | NEXT_ARG(); | |
110 | if (get_u32(&ife_prio_v, *argv, 0)) | |
111 | invarg("ife prio val is invalid", | |
112 | *argv); | |
8da6ff35 JHS |
113 | } else if (matches(*argv, "tcindex") == 0) { |
114 | NEXT_ARG(); | |
115 | if (get_u16(&ife_tcindex_v, *argv, 0)) | |
116 | invarg("ife tcindex val is invalid", | |
117 | *argv); | |
d3e51122 JHS |
118 | } else { |
119 | fprintf(stderr, "Illegal meta use type <%s>\n", | |
120 | *argv); | |
121 | return -1; | |
122 | } | |
123 | } else if (matches(*argv, "type") == 0) { | |
124 | NEXT_ARG(); | |
125 | if (get_u16(&ife_type, *argv, 0)) | |
126 | invarg("ife type is invalid", *argv); | |
664f35aa | 127 | fprintf(stderr, "IFE type 0x%04X\n", ife_type); |
bf338b60 | 128 | user_type = 1; |
d3e51122 JHS |
129 | } else if (matches(*argv, "dst") == 0) { |
130 | NEXT_ARG(); | |
131 | daddr = *argv; | |
132 | if (sscanf(daddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", | |
133 | dbuf, dbuf + 1, dbuf + 2, | |
134 | dbuf + 3, dbuf + 4, dbuf + 5) != 6) { | |
135 | fprintf(stderr, "Invalid mac address %s\n", | |
136 | daddr); | |
137 | } | |
138 | fprintf(stderr, "dst MAC address <%s>\n", daddr); | |
139 | ||
140 | } else if (matches(*argv, "src") == 0) { | |
141 | NEXT_ARG(); | |
142 | saddr = *argv; | |
143 | if (sscanf(saddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", | |
144 | sbuf, sbuf + 1, sbuf + 2, | |
145 | sbuf + 3, sbuf + 4, sbuf + 5) != 6) { | |
146 | fprintf(stderr, "Invalid mac address %s\n", | |
147 | saddr); | |
148 | } | |
149 | fprintf(stderr, "src MAC address <%s>\n", saddr); | |
150 | } else if (matches(*argv, "help") == 0) { | |
151 | ife_usage(); | |
152 | } else { | |
153 | break; | |
154 | } | |
155 | ||
156 | argc--; | |
157 | argv++; | |
158 | } | |
159 | ||
e67aba55 | 160 | parse_action_control_dflt(&argc, &argv, &p.action, false, TC_ACT_PIPE); |
d3e51122 JHS |
161 | |
162 | if (argc) { | |
163 | if (matches(*argv, "index") == 0) { | |
164 | NEXT_ARG(); | |
9a56cca3 | 165 | if (get_u32(&p.index, *argv, 0)) { |
d3e51122 JHS |
166 | fprintf(stderr, "ife: Illegal \"index\"\n"); |
167 | return -1; | |
168 | } | |
a78a2dba | 169 | ok++; |
d3e51122 JHS |
170 | argc--; |
171 | argv++; | |
172 | } | |
173 | } | |
174 | ||
175 | if (!ok) { | |
176 | fprintf(stderr, "IFE requires decode/encode specified\n"); | |
177 | ife_usage(); | |
178 | } | |
179 | ||
180 | tail = NLMSG_TAIL(n); | |
181 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); | |
182 | addattr_l(n, MAX_MSG, TCA_IFE_PARMS, &p, sizeof(p)); | |
183 | ||
184 | if (!(p.flags & IFE_ENCODE)) | |
185 | goto skip_encode; | |
186 | ||
187 | if (daddr) | |
188 | addattr_l(n, MAX_MSG, TCA_IFE_DMAC, dbuf, ETH_ALEN); | |
bf338b60 | 189 | if (user_type) |
d3e51122 | 190 | addattr_l(n, MAX_MSG, TCA_IFE_TYPE, &ife_type, 2); |
38060de1 AA |
191 | else |
192 | fprintf(stderr, "IFE type 0x%04X\n", ETH_P_IFE); | |
d3e51122 JHS |
193 | if (saddr) |
194 | addattr_l(n, MAX_MSG, TCA_IFE_SMAC, sbuf, ETH_ALEN); | |
195 | ||
196 | tail2 = NLMSG_TAIL(n); | |
197 | addattr_l(n, MAX_MSG, TCA_IFE_METALST, NULL, 0); | |
198 | if (ife_mark || ife_mark_v) { | |
199 | if (ife_mark_v) | |
200 | addattr_l(n, MAX_MSG, IFE_META_SKBMARK, &ife_mark_v, 4); | |
201 | else | |
202 | addattr_l(n, MAX_MSG, IFE_META_SKBMARK, NULL, 0); | |
203 | } | |
204 | if (ife_prio || ife_prio_v) { | |
205 | if (ife_prio_v) | |
206 | addattr_l(n, MAX_MSG, IFE_META_PRIO, &ife_prio_v, 4); | |
207 | else | |
208 | addattr_l(n, MAX_MSG, IFE_META_PRIO, NULL, 0); | |
209 | } | |
8da6ff35 JHS |
210 | if (ife_tcindex || ife_tcindex_v) { |
211 | if (ife_tcindex_v) | |
212 | addattr_l(n, MAX_MSG, IFE_META_TCINDEX, &ife_tcindex_v, | |
213 | 2); | |
214 | else | |
215 | addattr_l(n, MAX_MSG, IFE_META_TCINDEX, NULL, 0); | |
216 | } | |
d3e51122 JHS |
217 | |
218 | tail2->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail2; | |
219 | ||
220 | skip_encode: | |
221 | tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail; | |
222 | ||
223 | *argc_p = argc; | |
224 | *argv_p = argv; | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static int print_ife(struct action_util *au, FILE *f, struct rtattr *arg) | |
229 | { | |
230 | struct tc_ife *p = NULL; | |
231 | struct rtattr *tb[TCA_IFE_MAX + 1]; | |
232 | __u16 ife_type = 0; | |
233 | __u32 mmark = 0; | |
8da6ff35 | 234 | __u16 mtcindex = 0; |
d3e51122 JHS |
235 | __u32 mprio = 0; |
236 | int has_optional = 0; | |
d3e51122 JHS |
237 | SPRINT_BUF(b2); |
238 | ||
239 | if (arg == NULL) | |
240 | return -1; | |
241 | ||
242 | parse_rtattr_nested(tb, TCA_IFE_MAX, arg); | |
243 | ||
244 | if (tb[TCA_IFE_PARMS] == NULL) { | |
245 | fprintf(f, "[NULL ife parameters]"); | |
246 | return -1; | |
247 | } | |
248 | p = RTA_DATA(tb[TCA_IFE_PARMS]); | |
249 | ||
e67aba55 JP |
250 | fprintf(f, "ife %s ", p->flags & IFE_ENCODE ? "encode" : "decode"); |
251 | print_action_control(f, "action ", p->action, " "); | |
d3e51122 JHS |
252 | |
253 | if (tb[TCA_IFE_TYPE]) { | |
254 | ife_type = rta_getattr_u16(tb[TCA_IFE_TYPE]); | |
255 | has_optional = 1; | |
256 | fprintf(f, "type 0x%X ", ife_type); | |
257 | } | |
258 | ||
259 | if (has_optional) | |
260 | fprintf(f, "\n\t "); | |
261 | ||
262 | if (tb[TCA_IFE_METALST]) { | |
263 | struct rtattr *metalist[IFE_META_MAX + 1]; | |
264 | int len = 0; | |
265 | ||
266 | parse_rtattr_nested(metalist, IFE_META_MAX, | |
267 | tb[TCA_IFE_METALST]); | |
268 | ||
269 | if (metalist[IFE_META_SKBMARK]) { | |
270 | len = RTA_PAYLOAD(metalist[IFE_META_SKBMARK]); | |
271 | if (len) { | |
272 | mmark = rta_getattr_u32(metalist[IFE_META_SKBMARK]); | |
57ee4430 | 273 | fprintf(f, "use mark %u ", mmark); |
d3e51122 JHS |
274 | } else |
275 | fprintf(f, "allow mark "); | |
276 | } | |
277 | ||
8da6ff35 JHS |
278 | if (metalist[IFE_META_TCINDEX]) { |
279 | len = RTA_PAYLOAD(metalist[IFE_META_TCINDEX]); | |
d3e51122 | 280 | if (len) { |
8da6ff35 JHS |
281 | mtcindex = |
282 | rta_getattr_u16(metalist[IFE_META_TCINDEX]); | |
283 | fprintf(f, "use tcindex %d ", mtcindex); | |
d3e51122 | 284 | } else |
8da6ff35 | 285 | fprintf(f, "allow tcindex "); |
d3e51122 JHS |
286 | } |
287 | ||
288 | if (metalist[IFE_META_PRIO]) { | |
289 | len = RTA_PAYLOAD(metalist[IFE_META_PRIO]); | |
290 | if (len) { | |
291 | mprio = rta_getattr_u32(metalist[IFE_META_PRIO]); | |
57ee4430 | 292 | fprintf(f, "use prio %u ", mprio); |
d3e51122 JHS |
293 | } else |
294 | fprintf(f, "allow prio "); | |
295 | } | |
296 | ||
297 | } | |
298 | ||
299 | if (tb[TCA_IFE_DMAC]) { | |
300 | has_optional = 1; | |
301 | fprintf(f, "dst %s ", | |
302 | ll_addr_n2a(RTA_DATA(tb[TCA_IFE_DMAC]), | |
303 | RTA_PAYLOAD(tb[TCA_IFE_DMAC]), 0, b2, | |
304 | sizeof(b2))); | |
305 | ||
306 | } | |
307 | ||
308 | if (tb[TCA_IFE_SMAC]) { | |
309 | has_optional = 1; | |
310 | fprintf(f, "src %s ", | |
311 | ll_addr_n2a(RTA_DATA(tb[TCA_IFE_SMAC]), | |
312 | RTA_PAYLOAD(tb[TCA_IFE_SMAC]), 0, b2, | |
313 | sizeof(b2))); | |
314 | } | |
315 | ||
53075318 | 316 | fprintf(f, "\n\t index %u ref %d bind %d", p->index, p->refcnt, |
d3e51122 JHS |
317 | p->bindcnt); |
318 | if (show_stats) { | |
319 | if (tb[TCA_IFE_TM]) { | |
320 | struct tcf_t *tm = RTA_DATA(tb[TCA_IFE_TM]); | |
321 | ||
322 | print_tm(f, tm); | |
323 | } | |
324 | } | |
325 | ||
326 | fprintf(f, "\n"); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | struct action_util ife_action_util = { | |
332 | .id = "ife", | |
333 | .parse_aopt = parse_ife, | |
334 | .print_aopt = print_ife, | |
335 | }; |