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1 | /* |
2 | * f_matchall.c Match-all Classifier | |
3 | * | |
4 | * This program is free software; you can distribute 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: Jiri Pirko <jiri@mellanox.com>, Yotam Gigi <yotamg@mellanox.com> | |
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 | ||
27 | static void explain(void) | |
28 | { | |
29 | fprintf(stderr, "Usage: ... matchall [skip_sw | skip_hw]\n"); | |
30 | fprintf(stderr, " [ action ACTION_SPEC ] [ classid CLASSID ]\n"); | |
31 | fprintf(stderr, "\n"); | |
32 | fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n"); | |
33 | fprintf(stderr, " FILTERID := X:Y:Z\n"); | |
34 | fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n"); | |
35 | fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n"); | |
36 | } | |
37 | ||
38 | static int matchall_parse_opt(struct filter_util *qu, char *handle, | |
39 | int argc, char **argv, struct nlmsghdr *n) | |
40 | { | |
41 | struct tcmsg *t = NLMSG_DATA(n); | |
42 | struct rtattr *tail; | |
43 | __u32 flags = 0; | |
44 | long h = 0; | |
45 | ||
46 | if (handle) { | |
47 | h = strtol(handle, NULL, 0); | |
48 | if (h == LONG_MIN || h == LONG_MAX) { | |
49 | fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n", | |
50 | handle); | |
51 | return -1; | |
52 | } | |
53 | } | |
54 | t->tcm_handle = h; | |
55 | ||
56 | if (argc == 0) | |
57 | return 0; | |
58 | ||
59 | tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len)); | |
60 | addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0); | |
61 | ||
62 | while (argc > 0) { | |
63 | if (matches(*argv, "classid") == 0 || | |
64 | strcmp(*argv, "flowid") == 0) { | |
65 | unsigned int handle; | |
66 | ||
67 | NEXT_ARG(); | |
68 | if (get_tc_classid(&handle, *argv)) { | |
69 | fprintf(stderr, "Illegal \"classid\"\n"); | |
70 | return -1; | |
71 | } | |
72 | addattr_l(n, MAX_MSG, TCA_MATCHALL_CLASSID, &handle, 4); | |
73 | } else if (matches(*argv, "action") == 0) { | |
74 | NEXT_ARG(); | |
75 | if (parse_action(&argc, &argv, TCA_MATCHALL_ACT, n)) { | |
76 | fprintf(stderr, "Illegal \"action\"\n"); | |
77 | return -1; | |
78 | } | |
79 | continue; | |
80 | ||
81 | } else if (strcmp(*argv, "skip_hw") == 0) { | |
82 | NEXT_ARG(); | |
83 | flags |= TCA_CLS_FLAGS_SKIP_HW; | |
84 | continue; | |
85 | } else if (strcmp(*argv, "skip_sw") == 0) { | |
86 | NEXT_ARG(); | |
87 | flags |= TCA_CLS_FLAGS_SKIP_SW; | |
88 | continue; | |
89 | } else if (strcmp(*argv, "help") == 0) { | |
90 | explain(); | |
91 | return -1; | |
92 | } else { | |
93 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
94 | explain(); | |
95 | return -1; | |
96 | } | |
97 | argc--; argv++; | |
98 | } | |
99 | ||
100 | if (flags) { | |
101 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | | |
102 | TCA_CLS_FLAGS_SKIP_SW))) { | |
103 | fprintf(stderr, | |
104 | "skip_hw and skip_sw are mutually exclusive\n"); | |
105 | return -1; | |
106 | } | |
107 | addattr_l(n, MAX_MSG, TCA_MATCHALL_FLAGS, &flags, 4); | |
108 | } | |
109 | ||
110 | tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail; | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static int matchall_print_opt(struct filter_util *qu, FILE *f, | |
115 | struct rtattr *opt, __u32 handle) | |
116 | { | |
117 | struct rtattr *tb[TCA_MATCHALL_MAX+1]; | |
118 | ||
119 | if (opt == NULL) | |
120 | return 0; | |
121 | ||
122 | parse_rtattr_nested(tb, TCA_MATCHALL_MAX, opt); | |
123 | ||
124 | if (handle) | |
125 | fprintf(f, "handle 0x%x ", handle); | |
126 | ||
127 | if (tb[TCA_MATCHALL_CLASSID]) { | |
128 | SPRINT_BUF(b1); | |
129 | fprintf(f, "flowid %s ", | |
130 | sprint_tc_classid(rta_getattr_u32(tb[TCA_MATCHALL_CLASSID]), b1)); | |
131 | } | |
132 | ||
133 | if (tb[TCA_MATCHALL_ACT]) | |
134 | tc_print_action(f, tb[TCA_MATCHALL_ACT]); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | struct filter_util matchall_filter_util = { | |
140 | .id = "matchall", | |
141 | .parse_fopt = matchall_parse_opt, | |
142 | .print_fopt = matchall_print_opt, | |
143 | }; |