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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 SH |
25 | static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc, |
26 | char **argv, struct nlmsghdr *n) | |
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 | } | |
32a121cb SH |
52 | addattr_l(n, 4096, TCA_TCINDEX_HASH, &hash, sizeof(hash)); |
53 | } else if (!strcmp(*argv,"mask")) { | |
aba5acdf SH |
54 | __u16 mask; |
55 | ||
56 | NEXT_ARG(); | |
32a121cb | 57 | mask = strtoul(*argv, &end, 0); |
aba5acdf SH |
58 | if (*end) { |
59 | explain(); | |
60 | return -1; | |
61 | } | |
32a121cb SH |
62 | addattr_l(n, 4096, TCA_TCINDEX_MASK, &mask, sizeof(mask)); |
63 | } else if (!strcmp(*argv,"shift")) { | |
aba5acdf SH |
64 | int shift; |
65 | ||
66 | NEXT_ARG(); | |
32a121cb | 67 | shift = strtoul(*argv, &end, 0); |
aba5acdf SH |
68 | if (*end) { |
69 | explain(); | |
70 | return -1; | |
71 | } | |
32a121cb | 72 | addattr_l(n, 4096, TCA_TCINDEX_SHIFT, &shift, |
aba5acdf | 73 | sizeof(shift)); |
32a121cb | 74 | } else if (!strcmp(*argv,"fall_through")) { |
aba5acdf SH |
75 | int value = 1; |
76 | ||
32a121cb | 77 | addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, |
aba5acdf | 78 | sizeof(value)); |
32a121cb | 79 | } else if (!strcmp(*argv,"pass_on")) { |
aba5acdf SH |
80 | int value = 0; |
81 | ||
32a121cb | 82 | addattr_l(n, 4096, TCA_TCINDEX_FALL_THROUGH, &value, |
aba5acdf | 83 | sizeof(value)); |
32a121cb | 84 | } else if (!strcmp(*argv,"classid")) { |
aba5acdf SH |
85 | __u32 handle; |
86 | ||
87 | NEXT_ARG(); | |
32a121cb | 88 | if (get_tc_classid(&handle, *argv)) { |
aba5acdf SH |
89 | fprintf(stderr, "Illegal \"classid\"\n"); |
90 | return -1; | |
91 | } | |
92 | addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4); | |
32a121cb | 93 | } else if (!strcmp(*argv,"police")) { |
aba5acdf SH |
94 | NEXT_ARG(); |
95 | if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) { | |
96 | fprintf(stderr, "Illegal \"police\"\n"); | |
97 | return -1; | |
98 | } | |
99 | continue; | |
32a121cb | 100 | } else if (!strcmp(*argv,"action")) { |
08139c2f JHS |
101 | NEXT_ARG(); |
102 | if (parse_police(&argc, &argv, TCA_TCINDEX_ACT, n)) { | |
103 | fprintf(stderr, "Illegal \"action\"\n"); | |
104 | return -1; | |
105 | } | |
106 | continue; | |
32a121cb | 107 | } else { |
aba5acdf SH |
108 | explain(); |
109 | return -1; | |
110 | } | |
111 | argc--; | |
112 | argv++; | |
113 | } | |
3b3ecd31 | 114 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
115 | return 0; |
116 | } | |
117 | ||
118 | ||
119 | static int tcindex_print_opt(struct filter_util *qu, FILE *f, | |
120 | struct rtattr *opt, __u32 handle) | |
121 | { | |
122 | struct rtattr *tb[TCA_TCINDEX_MAX+1]; | |
123 | ||
3b3ecd31 | 124 | if (opt == NULL) |
125 | return 0; | |
aba5acdf | 126 | |
3b3ecd31 | 127 | parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt); |
aba5acdf | 128 | |
32a121cb | 129 | if (handle != ~0) fprintf(f, "handle 0x%04x ", handle); |
aba5acdf SH |
130 | if (tb[TCA_TCINDEX_HASH]) { |
131 | __u16 hash; | |
132 | ||
133 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash)) | |
134 | return -1; | |
ff24746c | 135 | hash = rta_getattr_u16(tb[TCA_TCINDEX_HASH]); |
32a121cb | 136 | fprintf(f, "hash %d ", hash); |
aba5acdf SH |
137 | } |
138 | if (tb[TCA_TCINDEX_MASK]) { | |
139 | __u16 mask; | |
140 | ||
141 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask)) | |
142 | return -1; | |
ff24746c | 143 | mask = rta_getattr_u16(tb[TCA_TCINDEX_MASK]); |
32a121cb | 144 | fprintf(f, "mask 0x%04x ", mask); |
aba5acdf SH |
145 | } |
146 | if (tb[TCA_TCINDEX_SHIFT]) { | |
147 | int shift; | |
148 | ||
149 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift)) | |
150 | return -1; | |
151 | shift = *(int *) RTA_DATA(tb[TCA_TCINDEX_SHIFT]); | |
32a121cb | 152 | fprintf(f, "shift %d ", shift); |
aba5acdf SH |
153 | } |
154 | if (tb[TCA_TCINDEX_FALL_THROUGH]) { | |
155 | int fall_through; | |
156 | ||
157 | if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) < | |
158 | sizeof(fall_through)) | |
159 | return -1; | |
160 | fall_through = *(int *) RTA_DATA(tb[TCA_TCINDEX_FALL_THROUGH]); | |
32a121cb | 161 | fprintf(f, fall_through ? "fall_through " : "pass_on "); |
aba5acdf SH |
162 | } |
163 | if (tb[TCA_TCINDEX_CLASSID]) { | |
164 | SPRINT_BUF(b1); | |
32a121cb | 165 | fprintf(f, "classid %s ", sprint_tc_classid(*(__u32 *) |
aba5acdf SH |
166 | RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1)); |
167 | } | |
168 | if (tb[TCA_TCINDEX_POLICE]) { | |
169 | fprintf(f, "\n"); | |
170 | tc_print_police(f, tb[TCA_TCINDEX_POLICE]); | |
171 | } | |
08139c2f JHS |
172 | if (tb[TCA_TCINDEX_ACT]) { |
173 | fprintf(f, "\n"); | |
174 | tc_print_police(f, tb[TCA_TCINDEX_ACT]); | |
175 | } | |
aba5acdf SH |
176 | return 0; |
177 | } | |
178 | ||
6b7dff17 SH |
179 | struct filter_util tcindex_filter_util = { |
180 | .id = "tcindex", | |
181 | .parse_fopt = tcindex_parse_opt, | |
182 | .print_fopt = tcindex_print_opt, | |
aba5acdf | 183 | }; |