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Commit | Line | Data |
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2265da08 | 1 | /* |
ae665a52 | 2 | * m_gact.c generic actions module |
2265da08 SH |
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 | * | |
ae665a52 SH |
9 | * Authors: J Hadi Salim (hadi@cyberus.ca) |
10 | * | |
2265da08 SH |
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 | ||
23 | #include "utils.h" | |
24 | #include "tc_util.h" | |
25 | #include <linux/tc_act/tc_gact.h> | |
26 | ||
27 | /* define to turn on probablity stuff */ | |
28 | ||
29 | #ifdef CONFIG_GACT_PROB | |
ae665a52 | 30 | static const char *prob_n2a(int p) |
2265da08 SH |
31 | { |
32 | if (p == PGACT_NONE) | |
33 | return "none"; | |
34 | if (p == PGACT_NETRAND) | |
35 | return "netrand"; | |
36 | if (p == PGACT_DETERM) | |
37 | return "determ"; | |
38 | return "none"; | |
39 | } | |
40 | #endif | |
41 | ||
42 | static void | |
43 | explain(void) | |
44 | { | |
45 | #ifdef CONFIG_GACT_PROB | |
46 | fprintf(stderr, "Usage: ... gact <ACTION> [RAND] [INDEX]\n"); | |
47 | fprintf(stderr, | |
32a121cb SH |
48 | "Where: \tACTION := reclassify | drop | continue | pass\n" |
49 | "\tRAND := random <RANDTYPE> <ACTION> <VAL>\n" | |
50 | "\tRANDTYPE := netrand | determ\n" | |
ebf32083 JHS |
51 | "\tVAL : = value not exceeding 10000\n" |
52 | "\tINDEX := index value used\n" | |
302d3fb7 | 53 | "\n"); |
2265da08 SH |
54 | #else |
55 | fprintf(stderr, "Usage: ... gact <ACTION> [INDEX]\n"); | |
56 | fprintf(stderr, | |
32a121cb | 57 | "Where: \tACTION := reclassify | drop | continue | pass\n" |
ebf32083 | 58 | "\tINDEX := index value used\n" |
f1e4f042 | 59 | "\n"); |
2265da08 SH |
60 | #endif |
61 | } | |
62 | ||
302d3fb7 | 63 | |
ebf32083 JHS |
64 | static void |
65 | usage(void) | |
66 | { | |
67 | explain(); | |
68 | exit(-1); | |
69 | } | |
70 | ||
d1f28cf1 | 71 | static int |
2265da08 SH |
72 | get_act(char ***argv_p) |
73 | { | |
74 | char **argv = *argv_p; | |
75 | ||
76 | if (matches(*argv, "reclassify") == 0) { | |
77 | return TC_ACT_RECLASSIFY; | |
78 | } else if (matches(*argv, "drop") == 0 || matches(*argv, "shot") == 0) { | |
79 | return TC_ACT_SHOT; | |
80 | } else if (matches(*argv, "continue") == 0) { | |
81 | return TC_ACT_UNSPEC; | |
82 | } else if (matches(*argv, "pipe") == 0) { | |
83 | return TC_ACT_PIPE; | |
84 | } else if (matches(*argv, "pass") == 0 || matches(*argv, "ok") == 0) { | |
85 | return TC_ACT_OK; | |
86 | } else { | |
32a121cb | 87 | fprintf(stderr, "bad action type %s\n", *argv); |
2265da08 SH |
88 | return -10; |
89 | } | |
90 | } | |
91 | ||
d1f28cf1 SH |
92 | static int |
93 | parse_gact(struct action_util *a, int *argc_p, char ***argv_p, | |
94 | int tca_id, struct nlmsghdr *n) | |
2265da08 SH |
95 | { |
96 | int argc = *argc_p; | |
97 | char **argv = *argv_p; | |
98 | int ok = 0; | |
99 | int action = TC_POLICE_RECLASSIFY; | |
100 | struct tc_gact p; | |
101 | #ifdef CONFIG_GACT_PROB | |
102 | int rd = 0; | |
103 | struct tc_gact_p pp; | |
104 | #endif | |
105 | struct rtattr *tail; | |
106 | ||
32a121cb | 107 | memset(&p, 0, sizeof(p)); |
2265da08 SH |
108 | p.action = TC_POLICE_RECLASSIFY; |
109 | ||
110 | if (argc < 0) | |
111 | return -1; | |
112 | ||
113 | ||
114 | if (matches(*argv, "gact") == 0) { | |
115 | ok++; | |
116 | } else { | |
117 | action = get_act(&argv); | |
118 | if (action != -10) { | |
119 | p.action = action; | |
120 | ok++; | |
121 | } else { | |
122 | explain(); | |
123 | return action; | |
124 | } | |
125 | } | |
126 | ||
127 | if (ok) { | |
128 | argc--; | |
129 | argv++; | |
130 | } | |
131 | ||
132 | #ifdef CONFIG_GACT_PROB | |
133 | if (ok && argc > 0) { | |
134 | if (matches(*argv, "random") == 0) { | |
135 | rd = 1; | |
136 | NEXT_ARG(); | |
137 | if (matches(*argv, "netrand") == 0) { | |
138 | NEXT_ARG(); | |
139 | pp.ptype = PGACT_NETRAND; | |
140 | } else if (matches(*argv, "determ") == 0) { | |
141 | NEXT_ARG(); | |
142 | pp.ptype = PGACT_DETERM; | |
143 | } else { | |
144 | fprintf(stderr, "Illegal \"random type\"\n"); | |
145 | return -1; | |
146 | } | |
147 | ||
148 | action = get_act(&argv); | |
149 | if (action != -10) { /* FIXME */ | |
150 | pp.paction = action; | |
151 | } else { | |
152 | explain(); | |
153 | return -1; | |
154 | } | |
155 | argc--; | |
156 | argv++; | |
157 | if (get_u16(&pp.pval, *argv, 10)) { | |
32a121cb | 158 | fprintf(stderr, "Illegal probability val 0x%x\n", pp.pval); |
2265da08 SH |
159 | return -1; |
160 | } | |
161 | if (pp.pval > 10000) { | |
32a121cb | 162 | fprintf(stderr, "Illegal probability val 0x%x\n", pp.pval); |
2265da08 SH |
163 | return -1; |
164 | } | |
165 | argc--; | |
166 | argv++; | |
ebf32083 JHS |
167 | } else if (matches(*argv, "help") == 0) { |
168 | usage(); | |
2265da08 SH |
169 | } |
170 | } | |
171 | #endif | |
172 | ||
173 | if (argc > 0) { | |
174 | if (matches(*argv, "index") == 0) { | |
175 | NEXT_ARG(); | |
176 | if (get_u32(&p.index, *argv, 10)) { | |
177 | fprintf(stderr, "Illegal \"index\"\n"); | |
178 | return -1; | |
179 | } | |
180 | argc--; | |
181 | argv++; | |
182 | ok++; | |
f1e4f042 | 183 | } else if (matches(*argv, "help") == 0) { |
302d3fb7 | 184 | usage(); |
2265da08 SH |
185 | } |
186 | } | |
187 | ||
188 | if (!ok) | |
189 | return -1; | |
190 | ||
228569c3 | 191 | tail = NLMSG_TAIL(n); |
2265da08 | 192 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
32a121cb | 193 | addattr_l(n, MAX_MSG, TCA_GACT_PARMS, &p, sizeof(p)); |
2265da08 SH |
194 | #ifdef CONFIG_GACT_PROB |
195 | if (rd) { | |
32a121cb | 196 | addattr_l(n, MAX_MSG, TCA_GACT_PROB, &pp, sizeof(pp)); |
2265da08 SH |
197 | } |
198 | #endif | |
228569c3 | 199 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
2265da08 SH |
200 | |
201 | *argc_p = argc; | |
202 | *argv_p = argv; | |
203 | return 0; | |
204 | } | |
205 | ||
d1f28cf1 | 206 | static int |
32a121cb | 207 | print_gact(struct action_util *au, FILE * f, struct rtattr *arg) |
2265da08 SH |
208 | { |
209 | SPRINT_BUF(b1); | |
210 | #ifdef CONFIG_GACT_PROB | |
211 | SPRINT_BUF(b2); | |
212 | struct tc_gact_p *pp = NULL; | |
213 | struct tc_gact_p pp_dummy; | |
214 | #endif | |
215 | struct tc_gact *p = NULL; | |
216 | struct rtattr *tb[TCA_GACT_MAX + 1]; | |
217 | ||
218 | if (arg == NULL) | |
219 | return -1; | |
220 | ||
3b3ecd31 | 221 | parse_rtattr_nested(tb, TCA_GACT_MAX, arg); |
2265da08 SH |
222 | |
223 | if (tb[TCA_GACT_PARMS] == NULL) { | |
224 | fprintf(f, "[NULL gact parameters]"); | |
225 | return -1; | |
226 | } | |
227 | p = RTA_DATA(tb[TCA_GACT_PARMS]); | |
228 | ||
32a121cb | 229 | fprintf(f, "gact action %s", action_n2a(p->action, b1, sizeof(b1))); |
2265da08 | 230 | #ifdef CONFIG_GACT_PROB |
32a121cb | 231 | if (tb[TCA_GACT_PROB] != NULL) { |
2265da08 SH |
232 | pp = RTA_DATA(tb[TCA_GACT_PROB]); |
233 | } else { | |
234 | /* need to keep consistent output */ | |
32a121cb | 235 | memset(&pp_dummy, 0, sizeof(pp_dummy)); |
2265da08 SH |
236 | pp = &pp_dummy; |
237 | } | |
32a121cb | 238 | fprintf(f, "\n\t random type %s %s val %d", prob_n2a(pp->ptype), action_n2a(pp->paction, b2, sizeof (b2)), pp->pval); |
2265da08 | 239 | #endif |
32a121cb | 240 | fprintf(f, "\n\t index %d ref %d bind %d", p->index, p->refcnt, p->bindcnt); |
2265da08 SH |
241 | if (show_stats) { |
242 | if (tb[TCA_GACT_TM]) { | |
243 | struct tcf_t *tm = RTA_DATA(tb[TCA_GACT_TM]); | |
32a121cb SH |
244 | |
245 | print_tm(f, tm); | |
2265da08 SH |
246 | } |
247 | } | |
248 | fprintf(f, "\n "); | |
249 | return 0; | |
250 | } | |
251 | ||
95812b56 | 252 | struct action_util gact_action_util = { |
2265da08 SH |
253 | .id = "gact", |
254 | .parse_aopt = parse_gact, | |
255 | .print_aopt = print_gact, | |
2265da08 | 256 | }; |