1 /* vi: set sw=4 ts=4: */
5 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
11 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
16 #include "inet_common.h"
18 int get_integer(int *val, char *arg, int base)
25 res = strtol(arg, &ptr, base);
26 if (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
31 //XXX: FIXME: use some libbb function instead
32 int get_unsigned(unsigned *val, char *arg, int base)
39 res = strtoul(arg, &ptr, base);
40 if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
46 int get_u32(uint32_t * val, char *arg, int base)
53 res = strtoul(arg, &ptr, base);
54 if (!ptr || ptr == arg || *ptr || res > 0xFFFFFFFFUL)
60 int get_u16(uint16_t * val, char *arg, int base)
67 res = strtoul(arg, &ptr, base);
68 if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
74 int get_u8(uint8_t * val, char *arg, int base)
81 res = strtoul(arg, &ptr, base);
82 if (!ptr || ptr == arg || *ptr || res > 0xFF)
88 int get_s16(int16_t * val, char *arg, int base)
95 res = strtol(arg, &ptr, base);
96 if (!ptr || ptr == arg || *ptr || res > 0x7FFF || res < -0x8000)
102 int get_s8(int8_t * val, char *arg, int base)
109 res = strtol(arg, &ptr, base);
110 if (!ptr || ptr == arg || *ptr || res > 0x7F || res < -0x80)
116 int get_addr_1(inet_prefix * addr, char *name, int family)
118 memset(addr, 0, sizeof(*addr));
120 if (strcmp(name, bb_str_default) == 0 ||
121 strcmp(name, "all") == 0 || strcmp(name, "any") == 0) {
122 addr->family = family;
123 addr->bytelen = (family == AF_INET6 ? 16 : 4);
128 if (strchr(name, ':')) {
129 addr->family = AF_INET6;
130 if (family != AF_UNSPEC && family != AF_INET6)
132 if (inet_pton(AF_INET6, name, addr->data) <= 0)
139 addr->family = AF_INET;
140 if (family != AF_UNSPEC && family != AF_INET)
142 if (inet_pton(AF_INET, name, addr->data) <= 0)
149 int get_prefix_1(inet_prefix * dst, char *arg, int family)
155 memset(dst, 0, sizeof(*dst));
157 if (strcmp(arg, bb_str_default) == 0 || strcmp(arg, "any") == 0) {
158 dst->family = family;
164 slash = strchr(arg, '/');
167 err = get_addr_1(dst, arg, family);
169 dst->bitlen = (dst->family == AF_INET6) ? 128 : 32;
171 inet_prefix netmask_pfx;
173 netmask_pfx.family = AF_UNSPEC;
174 if ((get_unsigned(&plen, slash + 1, 0) || plen > dst->bitlen)
175 && (get_addr_1(&netmask_pfx, slash + 1, family)))
177 else if (netmask_pfx.family == AF_INET) {
178 /* fill in prefix length of dotted quad */
179 uint32_t mask = ntohl(netmask_pfx.data[0]);
180 uint32_t host = ~mask;
182 /* a valid netmask must be 2^n - 1 */
183 if (!(host & (host + 1))) {
184 for (plen = 0; mask; mask <<= 1)
186 if (plen >= 0 && plen <= dst->bitlen) {
188 /* dst->flags |= PREFIXLEN_SPECIFIED; */
204 int get_addr(inet_prefix * dst, char *arg, int family)
206 if (family == AF_PACKET) {
207 bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "address");
209 if (get_addr_1(dst, arg, family)) {
210 bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "address", arg);
215 int get_prefix(inet_prefix * dst, char *arg, int family)
217 if (family == AF_PACKET) {
218 bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "prefix");
220 if (get_prefix_1(dst, arg, family)) {
221 bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "prefix", arg);
226 uint32_t get_addr32(char *name)
230 if (get_addr_1(&addr, name, AF_INET)) {
231 bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "IP", "address", name);
236 void incomplete_command(void)
238 bb_error_msg_and_die("command line is not complete, try option \"help\"");
241 void invarg(const char *arg, const char *opt)
243 bb_error_msg_and_die(bb_msg_invalid_arg, arg, opt);
246 void duparg(const char *key, const char *arg)
248 bb_error_msg_and_die("duplicate \"%s\": \"%s\" is the second value", key, arg);
251 void duparg2(const char *key, const char *arg)
253 bb_error_msg_and_die("either \"%s\" is duplicate, or \"%s\" is garbage", key, arg);
256 int inet_addr_match(inet_prefix * a, inet_prefix * b, int bits)
258 uint32_t *a1 = a->data;
259 uint32_t *a2 = b->data;
260 int words = bits >> 0x05;
265 if (memcmp(a1, a2, words << 2))
275 mask = htonl((0xffffffff) << (0x20 - bits));
277 if ((w1 ^ w2) & mask)
284 const char *rt_addr_n2a(int af, int UNUSED_PARAM len,
285 void *addr, char *buf, int buflen)
290 return inet_ntop(af, addr, buf, buflen);
297 const char *format_host(int af, int len, void *addr, char *buf, int buflen)
299 #ifdef RESOLVE_HOSTNAMES
301 struct hostent *h_ent;
315 h_ent = gethostbyaddr(addr, len, af);
317 safe_strncpy(buf, h_ent->h_name, buflen);
323 return rt_addr_n2a(af, len, addr, buf, buflen);