Lines Matching defs:*
0 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 #include <errno.h>
5 #include <xtables.h>
6 #include <linux/netfilter_ipv6/ip6t_opts.h>
8 enum {
9 O_DSTLEN = 0,
10 O_DSTOPTS,
13 static void dst_help(void)
15 printf(
16 "dst match options:\n"
17 "[!] --dst-len length total length of this header\n"
18 " --dst-opts TYPE[:LEN][,TYPE[:LEN]...]\n"
19 " Options and its length (list, max: %d)\n",
20 IP6T_OPTS_OPTSNR);
23 static const struct xt_option_entry dst_opts[] = {
24 {.name = "dst-len", .id = O_DSTLEN, .type = XTTYPE_UINT32,
25 .flags = XTOPT_INVERT | XTOPT_PUT,
26 XTOPT_POINTER(struct ip6t_opts, hdrlen)},
27 {.name = "dst-opts", .id = O_DSTOPTS, .type = XTTYPE_STRING},
28 XTOPT_TABLEEND,
31 static uint32_t
32 parse_opts_num(const char *idstr, const char *typestr)
34 unsigned long int id;
35 char* ep;
37 id = strtoul(idstr, &ep, 0);
39 if ( idstr == ep ) {
40 xtables_error(PARAMETER_PROBLEM,
41 "dst: no valid digits in %s `%s'", typestr, idstr);
43 if ( id == ULONG_MAX && errno == ERANGE ) {
44 xtables_error(PARAMETER_PROBLEM,
45 "%s `%s' specified too big: would overflow",
46 typestr, idstr);
48 if ( *idstr != '\0' && *ep != '\0' ) {
49 xtables_error(PARAMETER_PROBLEM,
50 "dst: error parsing %s `%s'", typestr, idstr);
52 return id;
55 static int
56 parse_options(const char *optsstr, uint16_t *opts)
58 char *buffer, *cp, *next, *range;
59 unsigned int i;
61 buffer = strdup(optsstr);
62 if (!buffer)
63 xtables_error(OTHER_PROBLEM, "strdup failed");
65 for (cp = buffer, i = 0; cp && i < IP6T_OPTS_OPTSNR; cp = next, i++)
67 next = strchr(cp, ',');
69 if (next)
70 *next++='\0';
72 range = strchr(cp, ':');
74 if (range) {
75 if (i == IP6T_OPTS_OPTSNR-1)
76 xtables_error(PARAMETER_PROBLEM,
77 "too many ports specified");
78 *range++ = '\0';
81 opts[i] = (parse_opts_num(cp, "opt") & 0xFF) << 8;
82 if (range) {
83 if (opts[i] == 0)
84 xtables_error(PARAMETER_PROBLEM,
85 "PAD0 hasn't got length");
86 opts[i] |= parse_opts_num(range, "length") & 0xFF;
87 } else
88 opts[i] |= (0x00FF);
90 #ifdef DEBUG
91 printf("opts str: %s %s\n", cp, range);
92 printf("opts opt: %04X\n", opts[i]);
93 #endif
96 if (cp)
97 xtables_error(PARAMETER_PROBLEM, "too many addresses specified");
99 free(buffer);
101 #ifdef DEBUG
102 printf("addr nr: %d\n", i);
103 #endif
105 return i;
108 static void dst_parse(struct xt_option_call *cb)
110 struct ip6t_opts *optinfo = cb->data;
112 xtables_option_parse(cb);
113 switch (cb->entry->id) {
114 case O_DSTLEN:
115 optinfo->flags |= IP6T_OPTS_LEN;
116 break;
117 case O_DSTOPTS:
118 optinfo->optsnr = parse_options(cb->arg, optinfo->opts);
119 optinfo->flags |= IP6T_OPTS_OPTS;
120 break;
124 static void
125 print_options(unsigned int optsnr, uint16_t *optsp)
127 unsigned int i;
129 printf(" ");
130 for(i = 0; i < optsnr; i++) {
131 printf("%d", (optsp[i] & 0xFF00) >> 8);
133 if ((optsp[i] & 0x00FF) != 0x00FF)
134 printf(":%d", (optsp[i] & 0x00FF));
136 printf("%c", (i != optsnr - 1) ? ',' : ' ');
140 static void dst_print(const void *ip, const struct xt_entry_match *match,
141 int numeric)
143 const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
145 printf(" dst");
146 if (optinfo->flags & IP6T_OPTS_LEN)
147 printf(" length:%s%u",
148 optinfo->invflags & IP6T_OPTS_INV_LEN ? "!" : "",
149 optinfo->hdrlen);
151 if (optinfo->flags & IP6T_OPTS_OPTS)
152 printf(" opts");
154 print_options(optinfo->optsnr, (uint16_t *)optinfo->opts);
156 if (optinfo->invflags & ~IP6T_OPTS_INV_MASK)
157 printf(" Unknown invflags: 0x%X",
158 optinfo->invflags & ~IP6T_OPTS_INV_MASK);
161 static void dst_save(const void *ip, const struct xt_entry_match *match)
163 const struct ip6t_opts *optinfo = (struct ip6t_opts *)match->data;
165 if (optinfo->flags & IP6T_OPTS_LEN) {
166 printf("%s --dst-len %u",
167 (optinfo->invflags & IP6T_OPTS_INV_LEN) ? " !" : "",
168 optinfo->hdrlen);
171 if (optinfo->flags & IP6T_OPTS_OPTS)
172 printf(" --dst-opts");
174 print_options(optinfo->optsnr, (uint16_t *)optinfo->opts);
177 static struct xtables_match dst_mt6_reg = {
178 .name = "dst",
179 .version = XTABLES_VERSION,
180 .family = NFPROTO_IPV6,
181 .size = XT_ALIGN(sizeof(struct ip6t_opts)),
182 .userspacesize = XT_ALIGN(sizeof(struct ip6t_opts)),
183 .help = dst_help,
184 .print = dst_print,
185 .save = dst_save,
186 .x6_parse = dst_parse,
187 .x6_options = dst_opts,
190 void
191 _init(void)
193 xtables_register_match(&dst_mt6_reg);