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aba5acdf SH |
1 | /* |
2 | * f_fw.c FW filter. | |
3 | * | |
4 | * This program is free software; you can redistribute 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
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 | ||
23 | #include "utils.h" | |
24 | #include "tc_util.h" | |
25 | ||
26 | static void explain(void) | |
27 | { | |
28 | fprintf(stderr, "Usage: ... fw [ classid CLASSID ] [ police POLICE_SPEC ]\n"); | |
29 | fprintf(stderr, " POLICE_SPEC := ... look at TBF\n"); | |
30 | fprintf(stderr, " CLASSID := X:Y\n"); | |
31 | } | |
32 | ||
33 | #define usage() return(-1) | |
34 | ||
35 | static int fw_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n) | |
36 | { | |
37 | struct tc_police tp; | |
38 | struct tcmsg *t = NLMSG_DATA(n); | |
39 | struct rtattr *tail; | |
40 | ||
41 | memset(&tp, 0, sizeof(tp)); | |
42 | ||
43 | if (handle) { | |
44 | if (get_u32(&t->tcm_handle, handle, 0)) { | |
45 | fprintf(stderr, "Illegal \"handle\"\n"); | |
46 | return -1; | |
47 | } | |
48 | } | |
49 | ||
50 | if (argc == 0) | |
51 | return 0; | |
52 | ||
53 | tail = (struct rtattr*)(((void*)n)+NLMSG_ALIGN(n->nlmsg_len)); | |
54 | addattr_l(n, 4096, TCA_OPTIONS, NULL, 0); | |
55 | ||
56 | while (argc > 0) { | |
57 | if (matches(*argv, "classid") == 0 || | |
58 | matches(*argv, "flowid") == 0) { | |
59 | unsigned handle; | |
60 | NEXT_ARG(); | |
61 | if (get_tc_classid(&handle, *argv)) { | |
62 | fprintf(stderr, "Illegal \"classid\"\n"); | |
63 | return -1; | |
64 | } | |
65 | addattr_l(n, 4096, TCA_FW_CLASSID, &handle, 4); | |
66 | } else if (matches(*argv, "police") == 0) { | |
67 | NEXT_ARG(); | |
68 | if (parse_police(&argc, &argv, TCA_FW_POLICE, n)) { | |
69 | fprintf(stderr, "Illegal \"police\"\n"); | |
70 | return -1; | |
71 | } | |
72 | continue; | |
73 | } else if (strcmp(*argv, "help") == 0) { | |
74 | explain(); | |
75 | return -1; | |
76 | } else { | |
77 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
78 | explain(); | |
79 | return -1; | |
80 | } | |
81 | argc--; argv++; | |
82 | } | |
83 | tail->rta_len = (((void*)n)+n->nlmsg_len) - (void*)tail; | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static int fw_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle) | |
88 | { | |
89 | struct rtattr *tb[TCA_FW_MAX+1]; | |
90 | ||
91 | if (opt == NULL) | |
92 | return 0; | |
93 | ||
94 | memset(tb, 0, sizeof(tb)); | |
95 | if (opt) | |
96 | parse_rtattr(tb, TCA_FW_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt)); | |
97 | ||
98 | if (handle) | |
99 | fprintf(f, "handle 0x%x ", handle); | |
100 | ||
101 | if (tb[TCA_FW_CLASSID]) { | |
102 | SPRINT_BUF(b1); | |
103 | fprintf(f, "classid %s ", sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_FW_CLASSID]), b1)); | |
104 | } | |
105 | ||
106 | if (tb[TCA_FW_POLICE]) | |
107 | tc_print_police(f, tb[TCA_FW_POLICE]); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | struct filter_util fw_util = { | |
112 | NULL, | |
113 | "fw", | |
114 | fw_parse_opt, | |
115 | fw_print_opt, | |
116 | }; |