1 /* 2 * f_tcindex.c Traffic control index filter 3 * 4 * Written 1998,1999 by Werner Almesberger 5 */ 6 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <unistd.h> 10 #include <syslog.h> 11 #include <fcntl.h> 12 #include <string.h> 13 #include <netinet/in.h> 14 15 #include "utils.h" 16 #include "tc_util.h" 17 18 static void explain(void) 19 { 20 fprintf(stderr," Usage: ... tcindex [ hash SIZE ] [ mask MASK ]" 21 " [ shift SHIFT ]\n"); 22 fprintf(stderr," [ pass_on | fall_through ]\n"); 23 fprintf(stderr," [ classid CLASSID ] " 24 "[ police POLICE_SPEC ]\n"); 25 } 26 27 28 #define usage() return(-1) 29 30 31 static int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc, 32 char **argv, struct nlmsghdr *n) 33 { 34 struct tcmsg *t = NLMSG_DATA(n); 35 struct rtattr *tail; 36 char *end; 37 38 if (handle) { 39 t->tcm_handle = strtoul(handle,&end,0); 40 if (*end) { 41 fprintf(stderr, "Illegal filter ID\n"); 42 return -1; 43 } 44 } 45 if (!argc) return 0; 46 tail = NLMSG_TAIL(n); 47 addattr_l(n,4096,TCA_OPTIONS,NULL,0); 48 while (argc) { 49 if (!strcmp(*argv,"hash")) { 50 int hash; 51 52 NEXT_ARG(); 53 hash = strtoul(*argv,&end,0); 54 if (*end || !hash || hash > 0x10000) { 55 explain(); 56 return -1; 57 } 58 addattr_l(n,4096,TCA_TCINDEX_HASH,&hash,sizeof(hash)); 59 } 60 else if (!strcmp(*argv,"mask")) { 61 __u16 mask; 62 63 NEXT_ARG(); 64 mask = strtoul(*argv,&end,0); 65 if (*end) { 66 explain(); 67 return -1; 68 } 69 addattr_l(n,4096,TCA_TCINDEX_MASK,&mask,sizeof(mask)); 70 } 71 else if (!strcmp(*argv,"shift")) { 72 int shift; 73 74 NEXT_ARG(); 75 shift = strtoul(*argv,&end,0); 76 if (*end) { 77 explain(); 78 return -1; 79 } 80 addattr_l(n,4096,TCA_TCINDEX_SHIFT,&shift, 81 sizeof(shift)); 82 } 83 else if (!strcmp(*argv,"fall_through")) { 84 int value = 1; 85 86 addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value, 87 sizeof(value)); 88 } 89 else if (!strcmp(*argv,"pass_on")) { 90 int value = 0; 91 92 addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value, 93 sizeof(value)); 94 } 95 else if (!strcmp(*argv,"classid")) { 96 __u32 handle; 97 98 NEXT_ARG(); 99 if (get_tc_classid(&handle,*argv)) { 100 fprintf(stderr, "Illegal \"classid\"\n"); 101 return -1; 102 } 103 addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4); 104 } 105 else if (!strcmp(*argv,"police")) { 106 NEXT_ARG(); 107 if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) { 108 fprintf(stderr, "Illegal \"police\"\n"); 109 return -1; 110 } 111 continue; 112 } 113 else { 114 explain(); 115 return -1; 116 } 117 argc--; 118 argv++; 119 } 120 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 121 return 0; 122 } 123 124 125 static int tcindex_print_opt(struct filter_util *qu, FILE *f, 126 struct rtattr *opt, __u32 handle) 127 { 128 struct rtattr *tb[TCA_TCINDEX_MAX+1]; 129 130 if (opt == NULL) 131 return 0; 132 133 parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt); 134 135 if (handle != ~0) fprintf(f,"handle 0x%04x ",handle); 136 if (tb[TCA_TCINDEX_HASH]) { 137 __u16 hash; 138 139 if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash)) 140 return -1; 141 hash = *(__u16 *) RTA_DATA(tb[TCA_TCINDEX_HASH]); 142 fprintf(f,"hash %d ",hash); 143 } 144 if (tb[TCA_TCINDEX_MASK]) { 145 __u16 mask; 146 147 if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask)) 148 return -1; 149 mask = *(__u16 *) RTA_DATA(tb[TCA_TCINDEX_MASK]); 150 fprintf(f,"mask 0x%04x ",mask); 151 } 152 if (tb[TCA_TCINDEX_SHIFT]) { 153 int shift; 154 155 if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift)) 156 return -1; 157 shift = *(int *) RTA_DATA(tb[TCA_TCINDEX_SHIFT]); 158 fprintf(f,"shift %d ",shift); 159 } 160 if (tb[TCA_TCINDEX_FALL_THROUGH]) { 161 int fall_through; 162 163 if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) < 164 sizeof(fall_through)) 165 return -1; 166 fall_through = *(int *) RTA_DATA(tb[TCA_TCINDEX_FALL_THROUGH]); 167 fprintf(f,fall_through ? "fall_through " : "pass_on "); 168 } 169 if (tb[TCA_TCINDEX_CLASSID]) { 170 SPRINT_BUF(b1); 171 fprintf(f, "classid %s ",sprint_tc_classid(*(__u32 *) 172 RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1)); 173 } 174 if (tb[TCA_TCINDEX_POLICE]) { 175 fprintf(f, "\n"); 176 tc_print_police(f, tb[TCA_TCINDEX_POLICE]); 177 } 178 return 0; 179 } 180 181 struct filter_util tcindex_filter_util = { 182 .id = "tcindex", 183 .parse_fopt = tcindex_parse_opt, 184 .print_fopt = tcindex_print_opt, 185 }; 186
