1 /* 2 * q_dsmark.c Differentiated Services field marking. 3 * 4 * Hacked 1998,1999 by Werner Almesberger, EPFL ICA 5 * 6 */ 7 8 #include <stdio.h> 9 #include <stdlib.h> 10 #include <unistd.h> 11 #include <syslog.h> 12 #include <fcntl.h> 13 #include <sys/socket.h> 14 #include <netinet/in.h> 15 #include <arpa/inet.h> 16 #include <string.h> 17 18 #include "utils.h" 19 #include "tc_util.h" 20 21 22 static void explain(void) 23 { 24 fprintf(stderr,"Usage: dsmark indices INDICES [ default_index DEFAULT_INDEX ] [ set_tc_index ]\n"); 25 } 26 27 28 static int dsmark_parse_opt(struct qdisc_util *qu, int argc, char **argv, 29 struct nlmsghdr *n) 30 { 31 struct rtattr *tail; 32 __u16 ind; 33 char *end; 34 int dflt, set_tc_index; 35 36 ind = set_tc_index = 0; 37 dflt = -1; 38 while (argc > 0) { 39 if (!strcmp(*argv, "indices")) { 40 NEXT_ARG(); 41 ind = strtoul(*argv, &end, 0); 42 if (*end) { 43 explain(); 44 return -1; 45 } 46 } else if (!strcmp(*argv,"default_index") || !strcmp(*argv, 47 "default")) { 48 NEXT_ARG(); 49 dflt = strtoul(*argv, &end, 0); 50 if (*end) { 51 explain(); 52 return -1; 53 } 54 } else if (!strcmp(*argv,"set_tc_index")) { 55 set_tc_index = 1; 56 } else { 57 explain(); 58 return -1; 59 } 60 argc--; 61 argv++; 62 } 63 if (!ind) { 64 explain(); 65 return -1; 66 } 67 tail = NLMSG_TAIL(n); 68 addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); 69 addattr_l(n, 1024, TCA_DSMARK_INDICES, &ind, sizeof(ind)); 70 if (dflt != -1) { 71 __u16 tmp = dflt; 72 73 addattr_l(n, 1024, TCA_DSMARK_DEFAULT_INDEX, &tmp, sizeof(tmp)); 74 } 75 if (set_tc_index) addattr_l(n, 1024, TCA_DSMARK_SET_TC_INDEX, NULL, 0); 76 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 77 return 0; 78 } 79 80 81 static void explain_class(void) 82 { 83 fprintf(stderr, "Usage: ... dsmark [ mask MASK ] [ value VALUE ]\n"); 84 } 85 86 87 static int dsmark_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, 88 struct nlmsghdr *n) 89 { 90 struct rtattr *tail; 91 __u8 tmp; 92 char *end; 93 94 tail = NLMSG_TAIL(n); 95 addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); 96 while (argc > 0) { 97 if (!strcmp(*argv, "mask")) { 98 NEXT_ARG(); 99 tmp = strtoul(*argv, &end, 0); 100 if (*end) { 101 explain_class(); 102 return -1; 103 } 104 addattr_l(n, 1024, TCA_DSMARK_MASK, &tmp, 1); 105 } else if (!strcmp(*argv,"value")) { 106 NEXT_ARG(); 107 tmp = strtoul(*argv, &end, 0); 108 if (*end) { 109 explain_class(); 110 return -1; 111 } 112 addattr_l(n, 1024, TCA_DSMARK_VALUE, &tmp, 1); 113 } else { 114 explain_class(); 115 return -1; 116 } 117 argc--; 118 argv++; 119 } 120 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; 121 return 0; 122 } 123 124 125 126 static int dsmark_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) 127 { 128 struct rtattr *tb[TCA_DSMARK_MAX+1]; 129 130 if (!opt) return 0; 131 parse_rtattr(tb, TCA_DSMARK_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt)); 132 if (tb[TCA_DSMARK_MASK]) { 133 if (!RTA_PAYLOAD(tb[TCA_DSMARK_MASK])) 134 fprintf(stderr, "dsmark: empty mask\n"); 135 else fprintf(f, "mask 0x%02x ", 136 rta_getattr_u8(tb[TCA_DSMARK_MASK])); 137 } 138 if (tb[TCA_DSMARK_VALUE]) { 139 if (!RTA_PAYLOAD(tb[TCA_DSMARK_VALUE])) 140 fprintf(stderr, "dsmark: empty value\n"); 141 else fprintf(f, "value 0x%02x ", 142 rta_getattr_u8(tb[TCA_DSMARK_VALUE])); 143 } 144 if (tb[TCA_DSMARK_INDICES]) { 145 if (RTA_PAYLOAD(tb[TCA_DSMARK_INDICES]) < sizeof(__u16)) 146 fprintf(stderr, "dsmark: indices too short\n"); 147 else fprintf(f, "indices 0x%04x ", 148 rta_getattr_u16(tb[TCA_DSMARK_INDICES])); 149 } 150 if (tb[TCA_DSMARK_DEFAULT_INDEX]) { 151 if (RTA_PAYLOAD(tb[TCA_DSMARK_DEFAULT_INDEX]) < sizeof(__u16)) 152 fprintf(stderr, "dsmark: default_index too short\n"); 153 else fprintf(f, "default_index 0x%04x ", 154 rta_getattr_u16(tb[TCA_DSMARK_DEFAULT_INDEX])); 155 } 156 if (tb[TCA_DSMARK_SET_TC_INDEX]) fprintf(f, "set_tc_index "); 157 return 0; 158 } 159 160 161 struct qdisc_util dsmark_qdisc_util = { 162 .id = "dsmark", 163 .parse_qopt = dsmark_parse_opt, 164 .print_qopt = dsmark_print_opt, 165 .parse_copt = dsmark_parse_class_opt, 166 .print_copt = dsmark_print_opt, 167 }; 168
