1dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat/* 2dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * f_tcindex.c Traffic control index filter 3dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 4dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Written 1998,1999 by Werner Almesberger 5dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat */ 6dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 7dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <stdio.h> 8dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <stdlib.h> 9dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <unistd.h> 10dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <syslog.h> 11dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <fcntl.h> 12dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <string.h> 13dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <netinet/in.h> 14dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 15dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include "utils.h" 16dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include "tc_util.h" 17dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 18dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic void explain(void) 19dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 20dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr," Usage: ... tcindex [ hash SIZE ] [ mask MASK ]" 21dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat " [ shift SHIFT ]\n"); 22dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr," [ pass_on | fall_through ]\n"); 23dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr," [ classid CLASSID ] " 24dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat "[ police POLICE_SPEC ]\n"); 25dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 26dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 27dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic int tcindex_parse_opt(struct filter_util *qu, char *handle, int argc, 28dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char **argv, struct nlmsghdr *n) 29dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 30dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct tcmsg *t = NLMSG_DATA(n); 31dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct rtattr *tail; 32dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char *end; 33dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 34dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (handle) { 35dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat t->tcm_handle = strtoul(handle,&end,0); 36dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (*end) { 37dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Illegal filter ID\n"); 38dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 39dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 40dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 41dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (!argc) return 0; 42dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat tail = NLMSG_TAIL(n); 43dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_OPTIONS,NULL,0); 44dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat while (argc) { 45dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (!strcmp(*argv,"hash")) { 46dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int hash; 47dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 48dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 49dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat hash = strtoul(*argv,&end,0); 50dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (*end || !hash || hash > 0x10000) { 51dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat explain(); 52dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 53dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 54dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_TCINDEX_HASH,&hash,sizeof(hash)); 55dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 56dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"mask")) { 57dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat __u16 mask; 58dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 59dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 60dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat mask = strtoul(*argv,&end,0); 61dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (*end) { 62dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat explain(); 63dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 64dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 65dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_TCINDEX_MASK,&mask,sizeof(mask)); 66dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 67dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"shift")) { 68dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int shift; 69dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 70dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 71dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat shift = strtoul(*argv,&end,0); 72dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (*end) { 73dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat explain(); 74dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 75dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 76dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_TCINDEX_SHIFT,&shift, 77dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat sizeof(shift)); 78dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 79dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"fall_through")) { 80dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int value = 1; 81dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 82dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value, 83dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat sizeof(value)); 84dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 85dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"pass_on")) { 86dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int value = 0; 87dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 88dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n,4096,TCA_TCINDEX_FALL_THROUGH,&value, 89dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat sizeof(value)); 90dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 91dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"classid")) { 92dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat __u32 handle; 93dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 94dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 95dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (get_tc_classid(&handle,*argv)) { 96dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Illegal \"classid\"\n"); 97dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 98dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 99dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat addattr_l(n, 4096, TCA_TCINDEX_CLASSID, &handle, 4); 100dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 101dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else if (!strcmp(*argv,"police")) { 102dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 103dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (parse_police(&argc, &argv, TCA_TCINDEX_POLICE, n)) { 104dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Illegal \"police\"\n"); 105dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 106dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 107dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 108dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 109dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else { 110dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat explain(); 111dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 112dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 113dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat argc--; 114dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat argv++; 115dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 116dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 117dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return 0; 118dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 119dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 120dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 121dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic int tcindex_print_opt(struct filter_util *qu, FILE *f, 122dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct rtattr *opt, __u32 handle) 123dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 124dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat struct rtattr *tb[TCA_TCINDEX_MAX+1]; 125dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 126dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (opt == NULL) 127dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return 0; 128dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 129dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat parse_rtattr_nested(tb, TCA_TCINDEX_MAX, opt); 130dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 131dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (handle != ~0) fprintf(f,"handle 0x%04x ",handle); 132dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_HASH]) { 133dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat __u16 hash; 134dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 135dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (RTA_PAYLOAD(tb[TCA_TCINDEX_HASH]) < sizeof(hash)) 136dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 137dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat hash = *(__u16 *) RTA_DATA(tb[TCA_TCINDEX_HASH]); 138dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f,"hash %d ",hash); 139dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 140dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_MASK]) { 141dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat __u16 mask; 142dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 143dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (RTA_PAYLOAD(tb[TCA_TCINDEX_MASK]) < sizeof(mask)) 144dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 145dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat mask = *(__u16 *) RTA_DATA(tb[TCA_TCINDEX_MASK]); 146dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f,"mask 0x%04x ",mask); 147dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 148dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_SHIFT]) { 149dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int shift; 150dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 151dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (RTA_PAYLOAD(tb[TCA_TCINDEX_SHIFT]) < sizeof(shift)) 152dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 153dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat shift = *(int *) RTA_DATA(tb[TCA_TCINDEX_SHIFT]); 154dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f,"shift %d ",shift); 155dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 156dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_FALL_THROUGH]) { 157dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int fall_through; 158dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 159dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (RTA_PAYLOAD(tb[TCA_TCINDEX_FALL_THROUGH]) < 160dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat sizeof(fall_through)) 161dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return -1; 162dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fall_through = *(int *) RTA_DATA(tb[TCA_TCINDEX_FALL_THROUGH]); 163dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f,fall_through ? "fall_through " : "pass_on "); 164dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 165dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_CLASSID]) { 166dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat SPRINT_BUF(b1); 167dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f, "classid %s ",sprint_tc_classid(*(__u32 *) 168dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat RTA_DATA(tb[TCA_TCINDEX_CLASSID]), b1)); 169dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 170dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (tb[TCA_TCINDEX_POLICE]) { 171dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(f, "\n"); 172dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat tc_print_police(f, tb[TCA_TCINDEX_POLICE]); 173dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 174dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return 0; 175dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 176dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 177dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstruct filter_util tcindex_filter_util = { 178dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat .id = "tcindex", 179dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat .parse_fopt = tcindex_parse_opt, 180dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat .print_fopt = tcindex_print_opt, 181dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat}; 182