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aba5acdf SH |
1 | /* |
2 | * f_tcindex.c Traffic control index filter | |
3 | * | |
4 | * Written 1998,1999 by Werner Almesberger | |
5 | */ | |
6 | ||
7 | #include <stdio.h> | |
8 | #include <stdlib.h> | |
9 | #include <unistd.h> | |
10 | #include <syslog.h> | |
11 | #include <fcntl.h> | |
12 | #include <string.h> | |
13 | #include <netinet/in.h> | |
14 | ||
15 | #include "utils.h" | |
16 | #include "tc_util.h" | |
17 | ||
18 | static void explain(void) | |
19 | { | |
32a121cb SH |
20 | fprintf(stderr," Usage: ... tcindex [ hash SIZE ] [ mask MASK ] [ shift SHIFT ]\n"); |
21 | fprintf(stderr, " [ pass_on | fall_through ]\n"); | |
22 | fprintf(stderr," [ classid CLASSID ] [ action ACTION_SPEC ]\n"); | |
aba5acdf SH |
23 | } |
24 | ||
aba5acdf | 25 | static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc, |
06be01f7 | 26 | char **argv, struct nlmsghdr *n) |
aba5acdf SH |
27 | { |
28 | struct tcmsg *t = NLMSG_DATA(n); | |
29 | struct rtattr *tail; | |
30 | char *end; | |
31 | ||
32 | if (handle) { | |
32a121cb | 33 | t->tcm_handle = strtoul(handle, &end, 0); |
aba5acdf SH |
34 | if (*end) { |
35 | fprintf(stderr, "Illegal filter ID\n"); | |
36 | return -1; | |
37 | } | |
38 | } | |
39 | if (!argc) return 0; | |
3b3ecd31 | 40 | tail = NLMSG_TAIL(n); |
32a121cb | 41 | addattr_l(n, 4096, TCA_OPTIONS, NULL, 0); |
aba5acdf | 42 | while (argc) { |
32a121cb | 43 | if (!strcmp(*argv, "hash")) { |
aba5acdf SH |
44 | int hash; |
45 | ||
46 | NEXT_ARG(); | |
32a121cb | 47 | hash = strtoul(*argv, &end, 0); |
aba5acdf SH |
48 | if (*end || !hash || hash > 0x10000) { |
49 | explain(); | |
50 | return -1; | |
51 | } | |
06be01f7 JHS |
52 | addattr_l(n, 4096, TCA_TCINDEX_HASH, &hash, |
53 | sizeof(hash)); | |
32a121cb | 54 | } else if (!strcmp(*argv,"mask")) { |
aba5acdf SH |
55 | __u16 mask; |
56 | ||
57 | NEXT_ARG(); | |
32a121cb | 58 | mask = strtoul(*argv, &end, 0); |
aba5acdf SH |
59 | if (*end) { |
60 | explain(); | |
61 | return -1; | |
62 | } | |
06be01f7 JHS |
63 | addattr_l(n, 4096, TCA_TCINDEX_MASK, &mask, |
64 | sizeof(mask)); | |
32a121cb | 65 | } else if (!strcmp(*argv,"shift")) { |
aba5acdf SH |
66 | int shift; |
67 | ||
68 | NEXT_ARG(); | |
32a121cb | 69 | shift = strtoul(*argv, &end, 0); |
aba5acdf SH |
70 | if (*end) { |
71 | explain(); | |
72 | return -1; | |
73 | } | |
32a121cb | 74 | addattr_l(n, 4096, TCA_TCINDEX_SHIFT, &shift, |
aba5acdf | 75 | sizeof(shift)); |
32a121cb | 76 | } else if (!strcmp(*argv,"fall_through")) { |
aba5acdf SH |
77 | int value = 1; |
78 | ||
32a121cb | 79 | addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, |
aba5acdf | 80 | sizeof(value)); |
32a121cb | 81 | } else if (!strcmp(*argv,"pass_on")) { |
aba5acdf SH |
82 | int value = 0; |
83 | ||
32a121cb | 84 | addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, |
aba5acdf | 85 | sizeof(value)); |
32a121cb | 86 | } else if (!strcmp(*argv,"classid")) { |
aba5acdf SH |
87 | __u32 handle; |
88 | ||
89 | NEXT_ARG(); | |
32a121cb | 90 | if (get_tc_classid(&handle, *argv)) { |
aba5acdf SH |
91 | fprintf(stderr, "Illegal \"classid\"\n"); |
92 | return -1; | |
93 | } | |
94 | addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4); | |
32a121cb | 95 | } else if (!strcmp(*argv,"police")) { |
aba5acdf SH |
96 | NEXT_ARG(); |
97 | if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) { | |
98 | fprintf(stderr, "Illegal \"police\"\n"); | |
99 | return -1; | |
100 | } | |
101 | continue; | |
32a121cb | 102 | } else if (!strcmp(*argv,"action")) { |
08139c2f | 103 | NEXT_ARG(); |
06be01f7 | 104 | if (parse_action(&argc, &argv, TCA_TCINDEX_ACT, n)) { |
08139c2f JHS |
105 | fprintf(stderr, "Illegal \"action\"\n"); |
106 | return -1; | |
107 | } | |
108 | continue; | |
32a121cb | 109 | } else { |
aba5acdf SH |
110 | explain(); |
111 | return -1; | |
112 | } | |
113 | argc--; | |
114 | argv++; | |
115 | } | |
3b3ecd31 | 116 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
117 | return 0; |
118 | } | |
119 | ||
120 | ||
121 | static int tcindex_print_opt(struct filter_util *qu, FILE *f, | |
06be01f7 | 122 | struct rtattr *opt, __u32 handle) |
aba5acdf SH |
123 | { |
124 | struct rtattr *tb[TCA_TCINDEX_MAX+1]; | |
125 | ||
3b3ecd31 | 126 | if (opt == NULL) |
127 | return 0; | |
aba5acdf | 128 | |
3b3ecd31 | 129 | parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt); |
aba5acdf | 130 | |
32a121cb | 131 | if (handle != ~0) fprintf(f, "handle 0x%04x ", handle); |
aba5acdf SH |
132 | if (tb[TCA_TCINDEX_HASH]) { |
133 | __u16 hash; | |
134 | ||
135 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash)) | |
136 | return -1; | |
ff24746c | 137 | hash = rta_getattr_u16(tb[TCA_TCINDEX_HASH]); |
32a121cb | 138 | fprintf(f, "hash %d ", hash); |
aba5acdf SH |
139 | } |
140 | if (tb[TCA_TCINDEX_MASK]) { | |
141 | __u16 mask; | |
142 | ||
143 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask)) | |
144 | return -1; | |
ff24746c | 145 | mask = rta_getattr_u16(tb[TCA_TCINDEX_MASK]); |
32a121cb | 146 | fprintf(f, "mask 0x%04x ", mask); |
aba5acdf SH |
147 | } |
148 | if (tb[TCA_TCINDEX_SHIFT]) { | |
149 | int shift; | |
150 | ||
151 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift)) | |
152 | return -1; | |
a59b6162 | 153 | shift = rta_getattr_u32(tb[TCA_TCINDEX_SHIFT]); |
32a121cb | 154 | fprintf(f, "shift %d ", shift); |
aba5acdf SH |
155 | } |
156 | if (tb[TCA_TCINDEX_FALL_THROUGH]) { | |
157 | int fall_through; | |
158 | ||
159 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) < | |
160 | sizeof(fall_through)) | |
161 | return -1; | |
a59b6162 | 162 | fall_through = rta_getattr_u32(tb[TCA_TCINDEX_FALL_THROUGH]); |
32a121cb | 163 | fprintf(f, fall_through ? "fall_through " : "pass_on "); |
aba5acdf SH |
164 | } |
165 | if (tb[TCA_TCINDEX_CLASSID]) { | |
166 | SPRINT_BUF(b1); | |
32a121cb | 167 | fprintf(f, "classid %s ", sprint_tc_classid(*(__u32 *) |
aba5acdf SH |
168 | RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1)); |
169 | } | |
170 | if (tb[TCA_TCINDEX_POLICE]) { | |
171 | fprintf(f, "\n"); | |
172 | tc_print_police(f, tb[TCA_TCINDEX_POLICE]); | |
173 | } | |
08139c2f JHS |
174 | if (tb[TCA_TCINDEX_ACT]) { |
175 | fprintf(f, "\n"); | |
06be01f7 | 176 | tc_print_action(f, tb[TCA_TCINDEX_ACT]); |
08139c2f | 177 | } |
aba5acdf SH |
178 | return 0; |
179 | } | |
180 | ||
6b7dff17 SH |
181 | struct filter_util tcindex_filter_util = { |
182 | .id = "tcindex", | |
183 | .parse_fopt = tcindex_parse_opt, | |
184 | .print_fopt = tcindex_print_opt, | |
aba5acdf | 185 | }; |