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1 | /* | |
2 | * m_gact.c generic 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 (hadi@cyberus.ca) | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <fcntl.h> | |
17 | #include <sys/socket.h> | |
18 | #include <netinet/in.h> | |
19 | #include <arpa/inet.h> | |
20 | #include <string.h> | |
21 | ||
22 | #include "utils.h" | |
23 | #include "tc_util.h" | |
24 | #include <linux/tc_act/tc_gact.h> | |
25 | ||
26 | /* define to turn on probablity stuff */ | |
27 | ||
28 | #ifdef CONFIG_GACT_PROB | |
29 | static const char *prob_n2a(int p) | |
30 | { | |
31 | if (p == PGACT_NONE) | |
32 | return "none"; | |
33 | if (p == PGACT_NETRAND) | |
34 | return "netrand"; | |
35 | if (p == PGACT_DETERM) | |
36 | return "determ"; | |
37 | return "none"; | |
38 | } | |
39 | #endif | |
40 | ||
41 | static void | |
42 | explain(void) | |
43 | { | |
44 | #ifdef CONFIG_GACT_PROB | |
45 | fprintf(stderr, "Usage: ... gact <ACTION> [RAND] [INDEX]\n"); | |
46 | fprintf(stderr, | |
47 | "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n" | |
48 | " \t goto chain <CHAIN_INDEX> | jump <JUMP_COUNT>\n" | |
49 | "\tRAND := random <RANDTYPE> <ACTION> <VAL>\n" | |
50 | "\tRANDTYPE := netrand | determ\n" | |
51 | "\tVAL : = value not exceeding 10000\n" | |
52 | "\tJUMP_COUNT := Absolute jump from start of action list\n" | |
53 | "\tINDEX := index value used\n" | |
54 | "\n"); | |
55 | #else | |
56 | fprintf(stderr, "Usage: ... gact <ACTION> [INDEX]\n"); | |
57 | fprintf(stderr, | |
58 | "Where: \tACTION := reclassify | drop | continue | pass | pipe |\n" | |
59 | " \t goto chain <CHAIN_INDEX> | jump <JUMP_COUNT>\n" | |
60 | "\tINDEX := index value used\n" | |
61 | "\tJUMP_COUNT := Absolute jump from start of action list\n" | |
62 | "\n"); | |
63 | #endif | |
64 | } | |
65 | ||
66 | ||
67 | static void | |
68 | usage(void) | |
69 | { | |
70 | explain(); | |
71 | exit(-1); | |
72 | } | |
73 | ||
74 | static int | |
75 | parse_gact(struct action_util *a, int *argc_p, char ***argv_p, | |
76 | int tca_id, struct nlmsghdr *n) | |
77 | { | |
78 | int argc = *argc_p; | |
79 | char **argv = *argv_p; | |
80 | struct tc_gact p = { 0 }; | |
81 | #ifdef CONFIG_GACT_PROB | |
82 | int rd = 0; | |
83 | struct tc_gact_p pp; | |
84 | #endif | |
85 | struct rtattr *tail; | |
86 | ||
87 | if (argc < 0) | |
88 | return -1; | |
89 | ||
90 | if (!matches(*argv, "gact")) | |
91 | NEXT_ARG_FWD(); | |
92 | if (parse_action_control(&argc, &argv, &p.action, false)) | |
93 | usage(); /* does not return */ | |
94 | ||
95 | #ifdef CONFIG_GACT_PROB | |
96 | if (argc > 0) { | |
97 | if (matches(*argv, "random") == 0) { | |
98 | rd = 1; | |
99 | NEXT_ARG(); | |
100 | if (matches(*argv, "netrand") == 0) { | |
101 | NEXT_ARG(); | |
102 | pp.ptype = PGACT_NETRAND; | |
103 | } else if (matches(*argv, "determ") == 0) { | |
104 | NEXT_ARG(); | |
105 | pp.ptype = PGACT_DETERM; | |
106 | } else { | |
107 | fprintf(stderr, "Illegal \"random type\"\n"); | |
108 | return -1; | |
109 | } | |
110 | ||
111 | if (parse_action_control(&argc, &argv, | |
112 | &pp.paction, false) == -1) | |
113 | usage(); | |
114 | if (get_u16(&pp.pval, *argv, 10)) { | |
115 | fprintf(stderr, | |
116 | "Illegal probability val 0x%x\n", | |
117 | pp.pval); | |
118 | return -1; | |
119 | } | |
120 | if (pp.pval > 10000) { | |
121 | fprintf(stderr, | |
122 | "Illegal probability val 0x%x\n", | |
123 | pp.pval); | |
124 | return -1; | |
125 | } | |
126 | argc--; | |
127 | argv++; | |
128 | } else if (matches(*argv, "help") == 0) { | |
129 | usage(); | |
130 | } | |
131 | } | |
132 | #endif | |
133 | ||
134 | if (argc > 0) { | |
135 | if (matches(*argv, "index") == 0) { | |
136 | NEXT_ARG(); | |
137 | if (get_u32(&p.index, *argv, 10)) { | |
138 | fprintf(stderr, "Illegal \"index\"\n"); | |
139 | return -1; | |
140 | } | |
141 | argc--; | |
142 | argv++; | |
143 | } else if (matches(*argv, "help") == 0) { | |
144 | usage(); | |
145 | } | |
146 | } | |
147 | ||
148 | tail = addattr_nest(n, MAX_MSG, tca_id); | |
149 | addattr_l(n, MAX_MSG, TCA_GACT_PARMS, &p, sizeof(p)); | |
150 | #ifdef CONFIG_GACT_PROB | |
151 | if (rd) | |
152 | addattr_l(n, MAX_MSG, TCA_GACT_PROB, &pp, sizeof(pp)); | |
153 | #endif | |
154 | addattr_nest_end(n, tail); | |
155 | ||
156 | *argc_p = argc; | |
157 | *argv_p = argv; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int | |
162 | print_gact(struct action_util *au, FILE *f, struct rtattr *arg) | |
163 | { | |
164 | #ifdef CONFIG_GACT_PROB | |
165 | struct tc_gact_p *pp = NULL; | |
166 | struct tc_gact_p pp_dummy; | |
167 | #endif | |
168 | struct tc_gact *p = NULL; | |
169 | struct rtattr *tb[TCA_GACT_MAX + 1]; | |
170 | ||
171 | if (arg == NULL) | |
172 | return -1; | |
173 | ||
174 | parse_rtattr_nested(tb, TCA_GACT_MAX, arg); | |
175 | ||
176 | if (tb[TCA_GACT_PARMS] == NULL) { | |
177 | print_string(PRINT_FP, NULL, "%s", "[NULL gact parameters]"); | |
178 | return -1; | |
179 | } | |
180 | p = RTA_DATA(tb[TCA_GACT_PARMS]); | |
181 | ||
182 | print_string(PRINT_ANY, "kind", "%s ", "gact"); | |
183 | print_action_control(f, "action ", p->action, ""); | |
184 | #ifdef CONFIG_GACT_PROB | |
185 | if (tb[TCA_GACT_PROB] != NULL) { | |
186 | pp = RTA_DATA(tb[TCA_GACT_PROB]); | |
187 | } else { | |
188 | /* need to keep consistent output */ | |
189 | memset(&pp_dummy, 0, sizeof(pp_dummy)); | |
190 | pp = &pp_dummy; | |
191 | } | |
192 | open_json_object("prob"); | |
193 | print_string(PRINT_ANY, "random_type", "\n\t random type %s", | |
194 | prob_n2a(pp->ptype)); | |
195 | print_action_control(f, " ", pp->paction, " "); | |
196 | print_int(PRINT_ANY, "val", "val %d", pp->pval); | |
197 | close_json_object(); | |
198 | #endif | |
199 | print_uint(PRINT_ANY, "index", "\n\t index %u", p->index); | |
200 | print_int(PRINT_ANY, "ref", " ref %d", p->refcnt); | |
201 | print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt); | |
202 | if (show_stats) { | |
203 | if (tb[TCA_GACT_TM]) { | |
204 | struct tcf_t *tm = RTA_DATA(tb[TCA_GACT_TM]); | |
205 | ||
206 | print_tm(f, tm); | |
207 | } | |
208 | } | |
209 | print_string(PRINT_FP, NULL, "%s", "\n"); | |
210 | return 0; | |
211 | } | |
212 | ||
213 | struct action_util gact_action_util = { | |
214 | .id = "gact", | |
215 | .parse_aopt = parse_gact, | |
216 | .print_aopt = print_gact, | |
217 | }; |