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