1 /* 2 * f_route.c ROUTE 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 (at) 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 "rt_names.h" 25 #include "tc_common.h" 26 #include "tc_util.h" 27 28 static void explain(void) 29 { 30 fprintf(stderr, "Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n"); 31 fprintf(stderr, " [ classid CLASSID ] [ action ACTION_SPEC ]\n"); 32 fprintf(stderr, " ACTION_SPEC := ... look at individual actions\n"); 33 fprintf(stderr, " CLASSID := X:Y\n"); 34 fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n"); 35 } 36 37 static int route_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n) 38 { 39 struct tcmsg *t = NLMSG_DATA(n); 40 struct rtattr *tail; 41 __u32 fh = 0xFFFF8000; 42 __u32 order = 0; 43 44 if (handle) { 45 if (get_u32(&t->tcm_handle, handle, 0)) { 46 fprintf(stderr, "Illegal \"handle\"\n"); 47 return -1; 48 } 49 } 50 51 if (argc == 0) 52 return 0; 53 54 tail = NLMSG_TAIL(n); 55 addattr_l(n, 4096, TCA_OPTIONS, NULL, 0); 56 57 while (argc > 0) { 58 if (matches(*argv, "to") == 0) { 59 __u32 id; 60 61 NEXT_ARG(); 62 if (rtnl_rtrealm_a2n(&id, *argv)) { 63 fprintf(stderr, "Illegal \"to\"\n"); 64 return -1; 65 } 66 addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4); 67 fh &= ~0x80FF; 68 fh |= id&0xFF; 69 } else if (matches(*argv, "from") == 0) { 70 __u32 id; 71 72 NEXT_ARG(); 73 if (rtnl_rtrealm_a2n(&id, *argv)) { 74 fprintf(stderr, "Illegal \"from\"\n"); 75 return -1; 76 } 77 addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4); 78 fh &= 0xFFFF; 79 fh |= id<<16; 80 } else if (matches(*argv, "fromif") == 0) { 81 __u32 id; 82 83 NEXT_ARG(); 84 ll_init_map(&rth); 85 if ((id = ll_name_to_index(*argv)) <= 0) { 86 fprintf(stderr, "Illegal \"fromif\"\n"); 87 return -1; 88 } 89 addattr_l(n, 4096, TCA_ROUTE4_IIF, &id, 4); 90 fh &= 0xFFFF; 91 fh |= (0x8000|id)<<16; 92 } else if (matches(*argv, "classid") == 0 || 93 strcmp(*argv, "flowid") == 0) { 94 unsigned int handle; 95 96 NEXT_ARG(); 97 if (get_tc_classid(&handle, *argv)) { 98 fprintf(stderr, "Illegal \"classid\"\n"); 99 return -1; 100 } 101 addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4); 102 } else if (matches(*argv, "police") == 0) { 103 NEXT_ARG(); 104 if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) { 105 fprintf(stderr, "Illegal \"police\"\n"); 106 return -1; 107 } 108 continue; 109 } else if (matches(*argv, "action") == 0) { 110 NEXT_ARG(); 111 if (parse_action(&argc, &argv, TCA_ROUTE4_ACT, n)) { 112 fprintf(stderr, "Illegal \"action\"\n"); 113 return -1; 114 } 115 continue; 116 } else if (matches(*argv, "order") == 0) { 117 NEXT_ARG(); 118 if (get_u32(&order, *argv, 0)) { 119 fprintf(stderr, "Illegal \"order\"\n"); 120 return -1; 121 } 122 } else if (strcmp(*argv, "help") == 0) { 123 explain(); 124 return -1; 125 } else { 126 fprintf(stderr, "What is \"%s\"?\n", *argv); 127 explain(); 128 return -1; 129 } 130 argc--; argv++; 131 } 132 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 133 if (order) { 134 fh &= ~0x7F00; 135 fh |= (order<<8)&0x7F00; 136 } 137 if (!t->tcm_handle) 138 t->tcm_handle = fh; 139 return 0; 140 } 141 142 static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle) 143 { 144 struct rtattr *tb[TCA_ROUTE4_MAX+1]; 145 146 SPRINT_BUF(b1); 147 148 if (opt == NULL) 149 return 0; 150 151 parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt); 152 153 if (handle) 154 fprintf(f, "fh 0x%08x ", handle); 155 if (handle&0x7F00) 156 fprintf(f, "order %d ", (handle>>8)&0x7F); 157 158 if (tb[TCA_ROUTE4_CLASSID]) { 159 SPRINT_BUF(b1); 160 fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1)); 161 } 162 if (tb[TCA_ROUTE4_TO]) 163 fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1))); 164 if (tb[TCA_ROUTE4_FROM]) 165 fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1))); 166 if (tb[TCA_ROUTE4_IIF]) 167 fprintf(f, "fromif %s", ll_index_to_name(rta_getattr_u32(tb[TCA_ROUTE4_IIF]))); 168 if (tb[TCA_ROUTE4_POLICE]) 169 tc_print_police(f, tb[TCA_ROUTE4_POLICE]); 170 if (tb[TCA_ROUTE4_ACT]) 171 tc_print_action(f, tb[TCA_ROUTE4_ACT], 0); 172 return 0; 173 } 174 175 struct filter_util route_filter_util = { 176 .id = "route", 177 .parse_fopt = route_parse_opt, 178 .print_fopt = route_print_opt, 179 }; 180
