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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
22 #include <sys/socket.h>
23 #include <netinet/in.h>
26 #include <arpa/inet.h>
36 int scan_number(char *arg, unsigned *val)
43 res = strtoul(arg, &ptr, 0);
44 if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
50 int get_integer(int *val, char *arg, int base)
57 res = strtol(arg, &ptr, base);
58 if (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
64 int get_unsigned(unsigned *val, char *arg, int base)
71 res = strtoul(arg, &ptr, base);
72 if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
78 int get_u32(__u32 *val, char *arg, int base)
85 res = strtoul(arg, &ptr, base);
86 if (!ptr || ptr == arg || *ptr || res > 0xFFFFFFFFUL)
92 int get_u16(__u16 *val, char *arg, int base)
99 res = strtoul(arg, &ptr, base);
100 if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
106 int get_u8(__u8 *val, char *arg, int base)
113 res = strtoul(arg, &ptr, base);
114 if (!ptr || ptr == arg || *ptr || res > 0xFF)
120 int get_s16(__s16 *val, char *arg, int base)
127 res = strtol(arg, &ptr, base);
128 if (!ptr || ptr == arg || *ptr || res > 0x7FFF || res < -0x8000)
134 int get_s8(__s8 *val, char *arg, int base)
141 res = strtol(arg, &ptr, base);
142 if (!ptr || ptr == arg || *ptr || res > 0x7F || res < -0x80)
148 int get_addr_1(inet_prefix *addr, char *name, int family)
151 unsigned char *ap = (unsigned char*)addr->data;
154 memset(addr, 0, sizeof(*addr));
156 if (strcmp(name, "default") == 0 || strcmp(name, "any") == 0) {
157 addr->family = family;
158 addr->bytelen = (family == AF_INET6 ? 16 : 4);
163 if (strchr(name, ':')) {
164 addr->family = AF_INET6;
165 if (family != AF_UNSPEC && family != AF_INET6)
167 if (inet_pton(AF_INET6, name, addr->data) <= 0)
174 addr->family = AF_INET;
175 if (family != AF_UNSPEC && family != AF_INET)
179 for (cp=name, i=0; *cp; cp++) {
180 if (*cp <= '9' && *cp >= '0') {
181 ap[i] = 10*ap[i] + (*cp-'0');
184 if (*cp == '.' && ++i <= 3)
191 int get_prefix_1(inet_prefix *dst, char *arg, int family)
197 memset(dst, 0, sizeof(*dst));
199 if (strcmp(arg, "default") == 0 || strcmp(arg, "any") == 0) {
200 dst->family = family;
206 slash = strchr(arg, '/');
209 err = get_addr_1(dst, arg, family);
211 dst->bitlen = (dst->family == AF_INET6 ? 128 : 32);
213 if (scan_number(slash+1, &plen) || plen > dst->bitlen) {
226 int get_addr(inet_prefix *dst, char *arg, int family)
228 if (get_addr_1(dst, arg, family)) {
229 fprintf(stderr, _("ip: %s is invalid inet address\n"), arg);
235 int get_prefix(inet_prefix *dst, char *arg, int family)
237 if (get_prefix_1(dst, arg, family)) {
238 fprintf(stderr, _("ip: %s is invalid inet prefix\n"), arg);
244 __u32 get_addr32(char *name)
247 if (get_addr_1(&addr, name, AF_INET)) {
248 fprintf(stderr, _("ip: %s is invalid IPv4 address\n"), name);
254 void invarg(char *msg)
256 fprintf(stderr, _("ip: argument is wrong: %s\n"), msg);
260 int matches(char *cmd, char *pattern)
262 int len = strlen(cmd);
263 if (len > strlen(pattern))
265 return memcmp(pattern, cmd, len);
268 int inet_addr_match(inet_prefix *a, inet_prefix *b, int bits)
272 int words = bits >> 0x05;
277 if (memcmp(a1, a2, words << 2))
287 mask = htonl((0xffffffff) << (0x20 - bits));
289 if ((w1 ^ w2) & mask)
296 const char *format_host(int af, void *addr, char *abuf, int alen)
298 #ifdef RESOLVE_HOSTNAMES
301 struct hostent *h_ent;
311 (h_ent = gethostbyaddr(addr, addrlen, af)) != NULL) {
312 snprintf(abuf, alen-1, "%s", h_ent->h_name);
317 return inet_ntop(af, addr, abuf, alen);