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c428e91b SH |
1 | /* |
2 | * f_basic.c Basic Classifier | |
3 | * | |
84d66882 | 4 | * This program is free software; you can distribute it and/or |
c428e91b SH |
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: Thomas Graf <tgraf@suug.ch> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
c428e91b SH |
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/if.h> | |
22 | ||
23 | #include "utils.h" | |
24 | #include "tc_util.h" | |
25 | #include "m_ematch.h" | |
26 | ||
27 | static void explain(void) | |
28 | { | |
8589eb4e MC |
29 | fprintf(stderr, |
30 | "Usage: ... basic [ match EMATCH_TREE ]\n" | |
31 | " [ action ACTION_SPEC ] [ classid CLASSID ]\n" | |
32 | "\n" | |
33 | "Where: SELECTOR := SAMPLE SAMPLE ...\n" | |
34 | " FILTERID := X:Y:Z\n" | |
35 | " ACTION_SPEC := ... look at individual actions\n" | |
36 | "\n" | |
37 | "NOTE: CLASSID is parsed as hexadecimal input.\n"); | |
c428e91b SH |
38 | } |
39 | ||
40 | static int basic_parse_opt(struct filter_util *qu, char *handle, | |
41 | int argc, char **argv, struct nlmsghdr *n) | |
42 | { | |
43 | struct tcmsg *t = NLMSG_DATA(n); | |
44 | struct rtattr *tail; | |
45 | long h = 0; | |
46 | ||
c428e91b SH |
47 | if (handle) { |
48 | h = strtol(handle, NULL, 0); | |
49 | if (h == LONG_MIN || h == LONG_MAX) { | |
50 | fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n", | |
51 | handle); | |
52 | return -1; | |
53 | } | |
54 | } | |
c428e91b SH |
55 | t->tcm_handle = h; |
56 | ||
285e7768 WC |
57 | if (argc == 0) |
58 | return 0; | |
59 | ||
32a121cb | 60 | tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len)); |
c428e91b SH |
61 | addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0); |
62 | ||
63 | while (argc > 0) { | |
64 | if (matches(*argv, "match") == 0) { | |
65 | NEXT_ARG(); | |
66 | if (parse_ematch(&argc, &argv, TCA_BASIC_EMATCHES, n)) { | |
67 | fprintf(stderr, "Illegal \"ematch\"\n"); | |
68 | return -1; | |
69 | } | |
70 | continue; | |
71 | } else if (matches(*argv, "classid") == 0 || | |
72 | strcmp(*argv, "flowid") == 0) { | |
32a121cb SH |
73 | unsigned int handle; |
74 | ||
c428e91b SH |
75 | NEXT_ARG(); |
76 | if (get_tc_classid(&handle, *argv)) { | |
77 | fprintf(stderr, "Illegal \"classid\"\n"); | |
78 | return -1; | |
79 | } | |
80 | addattr_l(n, MAX_MSG, TCA_BASIC_CLASSID, &handle, 4); | |
81 | } else if (matches(*argv, "action") == 0) { | |
82 | NEXT_ARG(); | |
83 | if (parse_action(&argc, &argv, TCA_BASIC_ACT, n)) { | |
84 | fprintf(stderr, "Illegal \"action\"\n"); | |
85 | return -1; | |
86 | } | |
87 | continue; | |
88 | ||
89 | } else if (matches(*argv, "police") == 0) { | |
90 | NEXT_ARG(); | |
91 | if (parse_police(&argc, &argv, TCA_BASIC_POLICE, n)) { | |
92 | fprintf(stderr, "Illegal \"police\"\n"); | |
93 | return -1; | |
94 | } | |
95 | continue; | |
96 | } else if (strcmp(*argv, "help") == 0) { | |
97 | explain(); | |
98 | return -1; | |
99 | } else { | |
100 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
101 | explain(); | |
102 | return -1; | |
103 | } | |
104 | argc--; argv++; | |
105 | } | |
106 | ||
32a121cb | 107 | tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail; |
c428e91b SH |
108 | return 0; |
109 | } | |
110 | ||
111 | static int basic_print_opt(struct filter_util *qu, FILE *f, | |
112 | struct rtattr *opt, __u32 handle) | |
113 | { | |
114 | struct rtattr *tb[TCA_BASIC_MAX+1]; | |
115 | ||
116 | if (opt == NULL) | |
117 | return 0; | |
118 | ||
119 | parse_rtattr_nested(tb, TCA_BASIC_MAX, opt); | |
120 | ||
121 | if (handle) | |
122 | fprintf(f, "handle 0x%x ", handle); | |
123 | ||
124 | if (tb[TCA_BASIC_CLASSID]) { | |
125 | SPRINT_BUF(b1); | |
126 | fprintf(f, "flowid %s ", | |
ff24746c | 127 | sprint_tc_classid(rta_getattr_u32(tb[TCA_BASIC_CLASSID]), b1)); |
c428e91b SH |
128 | } |
129 | ||
130 | if (tb[TCA_BASIC_EMATCHES]) | |
131 | print_ematch(f, tb[TCA_BASIC_EMATCHES]); | |
132 | ||
133 | if (tb[TCA_BASIC_POLICE]) { | |
134 | fprintf(f, "\n"); | |
135 | tc_print_police(f, tb[TCA_BASIC_POLICE]); | |
136 | } | |
137 | ||
138 | if (tb[TCA_BASIC_ACT]) { | |
9e713525 | 139 | tc_print_action(f, tb[TCA_BASIC_ACT], 0); |
c428e91b SH |
140 | } |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | struct filter_util basic_filter_util = { | |
146 | .id = "basic", | |
147 | .parse_fopt = basic_parse_opt, | |
148 | .print_fopt = basic_print_opt, | |
149 | }; |