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, " [ flowid CLASSID ] [ police POLICE_SPEC ]\n"); 32 fprintf(stderr, " POLICE_SPEC := ... look at TBF\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 tc_police tp; 40 struct tcmsg *t = NLMSG_DATA(n); 41 struct rtattr *tail; 42 __u32 fh = 0xFFFF8000; 43 __u32 order = 0; 44 45 memset(&tp, 0, sizeof(tp)); 46 47 if (handle) { 48 if (get_u32(&t->tcm_handle, handle, 0)) { 49 fprintf(stderr, "Illegal \"handle\"\n"); 50 return -1; 51 } 52 } 53 54 if (argc == 0) 55 return 0; 56 57 tail = NLMSG_TAIL(n); 58 addattr_l(n, 4096, TCA_OPTIONS, NULL, 0); 59 60 while (argc > 0) { 61 if (matches(*argv, "to") == 0) { 62 __u32 id; 63 NEXT_ARG(); 64 if (rtnl_rtrealm_a2n(&id, *argv)) { 65 fprintf(stderr, "Illegal \"to\"\n"); 66 return -1; 67 } 68 addattr_l(n, 4096, TCA_ROUTE4_TO, &id, 4); 69 fh &= ~0x80FF; 70 fh |= id&0xFF; 71 } else if (matches(*argv, "from") == 0) { 72 __u32 id; 73 NEXT_ARG(); 74 if (rtnl_rtrealm_a2n(&id, *argv)) { 75 fprintf(stderr, "Illegal \"from\"\n"); 76 return -1; 77 } 78 addattr_l(n, 4096, TCA_ROUTE4_FROM, &id, 4); 79 fh &= 0xFFFF; 80 fh |= id<<16; 81 } else if (matches(*argv, "fromif") == 0) { 82 __u32 id; 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 handle; 95 NEXT_ARG(); 96 if (get_tc_classid(&handle, *argv)) { 97 fprintf(stderr, "Illegal \"classid\"\n"); 98 return -1; 99 } 100 addattr_l(n, 4096, TCA_ROUTE4_CLASSID, &handle, 4); 101 } else if (matches(*argv, "police") == 0) { 102 NEXT_ARG(); 103 if (parse_police(&argc, &argv, TCA_ROUTE4_POLICE, n)) { 104 fprintf(stderr, "Illegal \"police\"\n"); 105 return -1; 106 } 107 continue; 108 } else if (matches(*argv, "order") == 0) { 109 NEXT_ARG(); 110 if (get_u32(&order, *argv, 0)) { 111 fprintf(stderr, "Illegal \"order\"\n"); 112 return -1; 113 } 114 } else if (strcmp(*argv, "help") == 0) { 115 explain(); 116 return -1; 117 } else { 118 fprintf(stderr, "What is \"%s\"?\n", *argv); 119 explain(); 120 return -1; 121 } 122 argc--; argv++; 123 } 124 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 125 if (order) { 126 fh &= ~0x7F00; 127 fh |= (order<<8)&0x7F00; 128 } 129 if (!t->tcm_handle) 130 t->tcm_handle = fh; 131 return 0; 132 } 133 134 static int route_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle) 135 { 136 struct rtattr *tb[TCA_ROUTE4_MAX+1]; 137 SPRINT_BUF(b1); 138 139 if (opt == NULL) 140 return 0; 141 142 parse_rtattr_nested(tb, TCA_ROUTE4_MAX, opt); 143 144 if (handle) 145 fprintf(f, "fh 0x%08x ", handle); 146 if (handle&0x7F00) 147 fprintf(f, "order %d ", (handle>>8)&0x7F); 148 149 if (tb[TCA_ROUTE4_CLASSID]) { 150 SPRINT_BUF(b1); 151 fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_ROUTE4_CLASSID]), b1)); 152 } 153 if (tb[TCA_ROUTE4_TO]) 154 fprintf(f, "to %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_TO]), b1, sizeof(b1))); 155 if (tb[TCA_ROUTE4_FROM]) 156 fprintf(f, "from %s ", rtnl_rtrealm_n2a(rta_getattr_u32(tb[TCA_ROUTE4_FROM]), b1, sizeof(b1))); 157 if (tb[TCA_ROUTE4_IIF]) 158 fprintf(f, "fromif %s", ll_index_to_name(*(int*)RTA_DATA(tb[TCA_ROUTE4_IIF]))); 159 if (tb[TCA_ROUTE4_POLICE]) 160 tc_print_police(f, tb[TCA_ROUTE4_POLICE]); 161 return 0; 162 } 163 164 struct filter_util route_filter_util = { 165 .id = "route", 166 .parse_fopt = route_parse_opt, 167 .print_fopt = route_print_opt, 168 }; 169
