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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, | |
ebf32083 JHS |
48 | "Where: \tACTION := reclassify | drop | continue | pass \n" |
49 | "\tRAND := random <RANDTYPE> <ACTION> <VAL>\n" | |
50 | "\tRANDTYPE := netrand | determ\n" | |
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, | |
302d3fb7 | 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 | ||
2265da08 SH |
71 | int |
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 { | |
87 | fprintf(stderr,"bad action type %s\n",*argv); | |
88 | return -10; | |
89 | } | |
90 | } | |
91 | ||
92 | int | |
93 | parse_gact(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, struct nlmsghdr *n) | |
94 | { | |
95 | int argc = *argc_p; | |
96 | char **argv = *argv_p; | |
97 | int ok = 0; | |
98 | int action = TC_POLICE_RECLASSIFY; | |
99 | struct tc_gact p; | |
100 | #ifdef CONFIG_GACT_PROB | |
101 | int rd = 0; | |
102 | struct tc_gact_p pp; | |
103 | #endif | |
104 | struct rtattr *tail; | |
105 | ||
106 | memset(&p, 0, sizeof (p)); | |
107 | p.action = TC_POLICE_RECLASSIFY; | |
108 | ||
109 | if (argc < 0) | |
110 | return -1; | |
111 | ||
112 | ||
113 | if (matches(*argv, "gact") == 0) { | |
114 | ok++; | |
115 | } else { | |
116 | action = get_act(&argv); | |
117 | if (action != -10) { | |
118 | p.action = action; | |
119 | ok++; | |
120 | } else { | |
121 | explain(); | |
122 | return action; | |
123 | } | |
124 | } | |
125 | ||
126 | if (ok) { | |
127 | argc--; | |
128 | argv++; | |
129 | } | |
130 | ||
131 | #ifdef CONFIG_GACT_PROB | |
132 | if (ok && argc > 0) { | |
133 | if (matches(*argv, "random") == 0) { | |
134 | rd = 1; | |
135 | NEXT_ARG(); | |
136 | if (matches(*argv, "netrand") == 0) { | |
137 | NEXT_ARG(); | |
138 | pp.ptype = PGACT_NETRAND; | |
139 | } else if (matches(*argv, "determ") == 0) { | |
140 | NEXT_ARG(); | |
141 | pp.ptype = PGACT_DETERM; | |
142 | } else { | |
143 | fprintf(stderr, "Illegal \"random type\"\n"); | |
144 | return -1; | |
145 | } | |
146 | ||
147 | action = get_act(&argv); | |
148 | if (action != -10) { /* FIXME */ | |
149 | pp.paction = action; | |
150 | } else { | |
151 | explain(); | |
152 | return -1; | |
153 | } | |
154 | argc--; | |
155 | argv++; | |
156 | if (get_u16(&pp.pval, *argv, 10)) { | |
157 | fprintf(stderr, "Illegal probability val 0x%x\n",pp.pval); | |
158 | return -1; | |
159 | } | |
160 | if (pp.pval > 10000) { | |
161 | fprintf(stderr, "Illegal probability val 0x%x\n",pp.pval); | |
162 | return -1; | |
163 | } | |
164 | argc--; | |
165 | argv++; | |
ebf32083 JHS |
166 | } else if (matches(*argv, "help") == 0) { |
167 | usage(); | |
2265da08 SH |
168 | } |
169 | } | |
170 | #endif | |
171 | ||
172 | if (argc > 0) { | |
173 | if (matches(*argv, "index") == 0) { | |
174 | NEXT_ARG(); | |
175 | if (get_u32(&p.index, *argv, 10)) { | |
176 | fprintf(stderr, "Illegal \"index\"\n"); | |
177 | return -1; | |
178 | } | |
179 | argc--; | |
180 | argv++; | |
181 | ok++; | |
f1e4f042 | 182 | } else if (matches(*argv, "help") == 0) { |
302d3fb7 | 183 | usage(); |
2265da08 SH |
184 | } |
185 | } | |
186 | ||
187 | if (!ok) | |
188 | return -1; | |
189 | ||
228569c3 | 190 | tail = NLMSG_TAIL(n); |
2265da08 SH |
191 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); |
192 | addattr_l(n, MAX_MSG, TCA_GACT_PARMS, &p, sizeof (p)); | |
193 | #ifdef CONFIG_GACT_PROB | |
194 | if (rd) { | |
195 | addattr_l(n, MAX_MSG, TCA_GACT_PROB, &pp, sizeof (pp)); | |
196 | } | |
197 | #endif | |
228569c3 | 198 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
2265da08 SH |
199 | |
200 | *argc_p = argc; | |
201 | *argv_p = argv; | |
202 | return 0; | |
203 | } | |
204 | ||
205 | int | |
206 | print_gact(struct action_util *au,FILE * f, struct rtattr *arg) | |
207 | { | |
208 | SPRINT_BUF(b1); | |
209 | #ifdef CONFIG_GACT_PROB | |
210 | SPRINT_BUF(b2); | |
211 | struct tc_gact_p *pp = NULL; | |
212 | struct tc_gact_p pp_dummy; | |
213 | #endif | |
214 | struct tc_gact *p = NULL; | |
215 | struct rtattr *tb[TCA_GACT_MAX + 1]; | |
216 | ||
217 | if (arg == NULL) | |
218 | return -1; | |
219 | ||
3b3ecd31 | 220 | parse_rtattr_nested(tb, TCA_GACT_MAX, arg); |
2265da08 SH |
221 | |
222 | if (tb[TCA_GACT_PARMS] == NULL) { | |
223 | fprintf(f, "[NULL gact parameters]"); | |
224 | return -1; | |
225 | } | |
226 | p = RTA_DATA(tb[TCA_GACT_PARMS]); | |
227 | ||
228 | fprintf(f, "gact action %s", action_n2a(p->action, b1, sizeof (b1))); | |
229 | #ifdef CONFIG_GACT_PROB | |
230 | if (NULL != tb[TCA_GACT_PROB]) { | |
231 | pp = RTA_DATA(tb[TCA_GACT_PROB]); | |
232 | } else { | |
233 | /* need to keep consistent output */ | |
234 | memset(&pp_dummy, 0, sizeof (pp_dummy)); | |
235 | pp = &pp_dummy; | |
236 | } | |
237 | fprintf(f, "\n\t random type %s %s val %d",prob_n2a(pp->ptype), action_n2a(pp->paction, b2, sizeof (b2)), pp->pval); | |
238 | #endif | |
239 | fprintf(f, "\n\t index %d ref %d bind %d",p->index, p->refcnt, p->bindcnt); | |
240 | if (show_stats) { | |
241 | if (tb[TCA_GACT_TM]) { | |
242 | struct tcf_t *tm = RTA_DATA(tb[TCA_GACT_TM]); | |
243 | print_tm(f,tm); | |
244 | } | |
245 | } | |
246 | fprintf(f, "\n "); | |
247 | return 0; | |
248 | } | |
249 | ||
95812b56 | 250 | struct action_util gact_action_util = { |
2265da08 SH |
251 | .id = "gact", |
252 | .parse_aopt = parse_gact, | |
253 | .print_aopt = print_gact, | |
2265da08 | 254 | }; |