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c428e91b SH |
1 | /* |
2 | * f_basic.c Basic Classifier | |
3 | * | |
4 | * This program is free software; you can u32istribute 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: Thomas Graf <tgraf@suug.ch> | |
10 | * | |
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 | #include <linux/if.h> | |
23 | ||
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include "m_ematch.h" | |
27 | ||
28 | static void explain(void) | |
29 | { | |
30 | fprintf(stderr, "Usage: ... basic [ match EMATCH_TREE ] [ police POLICE_SPEC ]\n"); | |
31 | fprintf(stderr, " [ action ACTION_SPEC ] [ classid CLASSID ]\n"); | |
32 | fprintf(stderr, "\n"); | |
33 | fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n"); | |
34 | fprintf(stderr, " FILTERID := X:Y:Z\n"); | |
35 | } | |
36 | ||
37 | static int basic_parse_opt(struct filter_util *qu, char *handle, | |
38 | int argc, char **argv, struct nlmsghdr *n) | |
39 | { | |
40 | struct tcmsg *t = NLMSG_DATA(n); | |
41 | struct rtattr *tail; | |
42 | long h = 0; | |
43 | ||
44 | if (argc == 0) | |
45 | return 0; | |
46 | ||
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 | } | |
ae665a52 | 55 | |
c428e91b SH |
56 | t->tcm_handle = h; |
57 | ||
58 | tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len)); | |
59 | addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0); | |
60 | ||
61 | while (argc > 0) { | |
62 | if (matches(*argv, "match") == 0) { | |
63 | NEXT_ARG(); | |
64 | if (parse_ematch(&argc, &argv, TCA_BASIC_EMATCHES, n)) { | |
65 | fprintf(stderr, "Illegal \"ematch\"\n"); | |
66 | return -1; | |
67 | } | |
68 | continue; | |
69 | } else if (matches(*argv, "classid") == 0 || | |
70 | strcmp(*argv, "flowid") == 0) { | |
71 | unsigned handle; | |
72 | NEXT_ARG(); | |
73 | if (get_tc_classid(&handle, *argv)) { | |
74 | fprintf(stderr, "Illegal \"classid\"\n"); | |
75 | return -1; | |
76 | } | |
77 | addattr_l(n, MAX_MSG, TCA_BASIC_CLASSID, &handle, 4); | |
78 | } else if (matches(*argv, "action") == 0) { | |
79 | NEXT_ARG(); | |
80 | if (parse_action(&argc, &argv, TCA_BASIC_ACT, n)) { | |
81 | fprintf(stderr, "Illegal \"action\"\n"); | |
82 | return -1; | |
83 | } | |
84 | continue; | |
85 | ||
86 | } else if (matches(*argv, "police") == 0) { | |
87 | NEXT_ARG(); | |
88 | if (parse_police(&argc, &argv, TCA_BASIC_POLICE, n)) { | |
89 | fprintf(stderr, "Illegal \"police\"\n"); | |
90 | return -1; | |
91 | } | |
92 | continue; | |
93 | } else if (strcmp(*argv, "help") == 0) { | |
94 | explain(); | |
95 | return -1; | |
96 | } else { | |
97 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
98 | explain(); | |
99 | return -1; | |
100 | } | |
101 | argc--; argv++; | |
102 | } | |
103 | ||
104 | tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int basic_print_opt(struct filter_util *qu, FILE *f, | |
109 | struct rtattr *opt, __u32 handle) | |
110 | { | |
111 | struct rtattr *tb[TCA_BASIC_MAX+1]; | |
112 | ||
113 | if (opt == NULL) | |
114 | return 0; | |
115 | ||
116 | parse_rtattr_nested(tb, TCA_BASIC_MAX, opt); | |
117 | ||
118 | if (handle) | |
119 | fprintf(f, "handle 0x%x ", handle); | |
120 | ||
121 | if (tb[TCA_BASIC_CLASSID]) { | |
122 | SPRINT_BUF(b1); | |
123 | fprintf(f, "flowid %s ", | |
124 | sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_BASIC_CLASSID]), b1)); | |
125 | } | |
126 | ||
127 | if (tb[TCA_BASIC_EMATCHES]) | |
128 | print_ematch(f, tb[TCA_BASIC_EMATCHES]); | |
129 | ||
130 | if (tb[TCA_BASIC_POLICE]) { | |
131 | fprintf(f, "\n"); | |
132 | tc_print_police(f, tb[TCA_BASIC_POLICE]); | |
133 | } | |
134 | ||
135 | if (tb[TCA_BASIC_ACT]) { | |
136 | tc_print_action(f, tb[TCA_BASIC_ACT]); | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | struct filter_util basic_filter_util = { | |
143 | .id = "basic", | |
144 | .parse_fopt = basic_parse_opt, | |
145 | .print_fopt = basic_print_opt, | |
146 | }; |