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36 * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
37 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions are met:
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63 * For inet_ntop() functions:
65 * Copyright (c) 1996 by Internet Software Consortium.
67 * Permission to use, copy, modify, and distribute this software for any
68 * purpose with or without fee is hereby granted, provided that the above
69 * copyright notice and this permission notice appear in all copies.
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77 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
88 #include <netinet/in.h>
90 #include <net/socket.h>
93 #include "cmdline_parse.h"
94 #include "cmdline_parse_ipaddr.h"
100 * WARNING: Don't even consider trying to compile this on a system where
101 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
104 static int inet_pton4(const char *src, unsigned char *dst);
105 static int inet_pton6(const char *src, unsigned char *dst);
108 * inet_pton(af, src, dst)
109 * convert from presentation format (which usually means ASCII printable)
110 * to network format (which is usually some kind of binary format).
112 * 1 if the address was valid for the specified address family
113 * 0 if the address wasn't valid (`dst' is untouched in this case)
114 * -1 if some other error occurred (`dst' is untouched in this case, too)
119 my_inet_pton(int af, const char *src, void *dst)
123 return (inet_pton4(src, dst));
125 return (inet_pton6(src, dst));
127 errno = EAFNOSUPPORT;
134 * inet_pton4(src, dst)
135 * like inet_aton() but without all the hexadecimal and shorthand.
137 * 1 if `src' is a valid dotted quad, else 0.
139 * does not touch `dst' unless it's returning 1.
144 inet_pton4(const char *src, unsigned char *dst)
146 static const char digits[] = "0123456789";
147 int saw_digit, octets, ch;
148 unsigned char tmp[INADDRSZ], *tp;
153 while ((ch = *src++) != '\0') {
156 if ((pch = strchr(digits, ch)) != NULL) {
157 unsigned int new = *tp * 10 + (pch - digits);
166 *tp = (unsigned char)new;
167 } else if (ch == '.' && saw_digit) {
178 memcpy(dst, tmp, INADDRSZ);
183 * inet_pton6(src, dst)
184 * convert presentation level address to network order binary form.
186 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
188 * (1) does not touch `dst' unless it's returning 1.
189 * (2) :: in a full address is silently ignored.
191 * inspired by Mark Andrews.
196 inet_pton6(const char *src, unsigned char *dst)
198 static const char xdigits_l[] = "0123456789abcdef",
199 xdigits_u[] = "0123456789ABCDEF";
200 unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
201 const char *xdigits, *curtok;
202 int ch, saw_xdigit, count_xdigit;
205 memset((tp = tmp), '\0', IN6ADDRSZ);
206 endp = tp + IN6ADDRSZ;
208 /* Leading :: requires some special handling. */
213 saw_xdigit = count_xdigit = 0;
215 while ((ch = *src++) != '\0') {
218 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
219 pch = strchr((xdigits = xdigits_u), ch);
221 if (count_xdigit >= 4)
224 val |= (pch - xdigits);
238 } else if (*src == '\0') {
241 if (tp + sizeof(int16_t) > endp)
243 *tp++ = (unsigned char) ((val >> 8) & 0xff);
244 *tp++ = (unsigned char) (val & 0xff);
250 if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
251 inet_pton4(curtok, tp) > 0) {
255 break; /* '\0' was seen by inet_pton4(). */
260 if (tp + sizeof(int16_t) > endp)
262 *tp++ = (unsigned char) ((val >> 8) & 0xff);
263 *tp++ = (unsigned char) (val & 0xff);
265 if (colonp != NULL) {
267 * Since some memmove()'s erroneously fail to handle
268 * overlapping regions, we'll do the shift by hand.
270 const int n = tp - colonp;
273 for (i = 1; i <= n; i++) {
274 endp[- i] = colonp[n - i];
281 memcpy(dst, tmp, IN6ADDRSZ);
286 cmdline_parse_ipaddr(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
289 struct cmdline_token_ipaddr *tk2 = (struct cmdline_token_ipaddr *)tk;
290 unsigned int token_len = 0;
291 char ip_str[INET6_ADDRSTRLEN+4]; /* '+4' is for prefixlen (if any) */
292 cmdline_ipaddr_t *ipaddr = res;
293 char *prefix, *prefix_end;
296 if (res && ressize < sizeof(cmdline_ipaddr_t))
299 /* if token is too big... */
300 token_len = snprintf(ip_str, sizeof(ip_str), "%s", buf);
301 if (token_len >= sizeof(ip_str))
304 /* convert the network prefix */
305 if (tk2->ipaddr_data.flags & CMDLINE_IPADDR_NETWORK) {
306 prefix = strrchr(ip_str, '/');
312 prefixlen = strtol(prefix, &prefix_end, 10);
313 if (errno || (*prefix_end != '\0') )
315 ipaddr->prefixlen = prefixlen;
318 ipaddr->prefixlen = 0;
321 /* convert the IP addr */
322 if ((tk2->ipaddr_data.flags & CMDLINE_IPADDR_V4) &&
323 my_inet_pton(AF_INET, ip_str, &ipaddr->addr.ipv4) == 1) {
324 ipaddr->family = AF_INET;
327 if ((tk2->ipaddr_data.flags & CMDLINE_IPADDR_V6) &&
328 my_inet_pton(AF_INET6, ip_str, &ipaddr->addr.ipv6) == 1) {
329 ipaddr->family = AF_INET6;
337 cmdline_help_ipaddr(cmdline_parse_token_hdr_t *tk, char *dstbuf,
340 struct cmdline_token_ipaddr *tk2 = (struct cmdline_token_ipaddr *)tk;
342 switch (tk2->ipaddr_data.flags) {
343 case CMDLINE_IPADDR_V4:
344 snprintf(dstbuf, size, "IPv4");
346 case CMDLINE_IPADDR_V6:
347 snprintf(dstbuf, size, "IPv6");
349 case CMDLINE_IPADDR_V4|CMDLINE_IPADDR_V6:
350 snprintf(dstbuf, size, "IPv4/IPv6");
352 case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V4:
353 snprintf(dstbuf, size, "IPv4 network");
355 case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V6:
356 snprintf(dstbuf, size, "IPv6 network");
358 case CMDLINE_IPADDR_NETWORK|CMDLINE_IPADDR_V4|CMDLINE_IPADDR_V6:
359 snprintf(dstbuf, size, "IPv4/IPv6 network");
362 snprintf(dstbuf, size, "IPaddr (bad flags)");
368 struct cmdline_token_ops cmdline_token_ipaddr_ops = {
369 .parse = cmdline_parse_ipaddr,
370 .complete_start = NULL,
371 .complete_iterate = NULL,
372 .complete_end = NULL,
373 .help = cmdline_help_ipaddr,