Yotam Gigi | d5cbf3f | 2016-08-31 09:28:26 +0200 | [diff] [blame] | 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 | }; |