2 * misc.c Various miscellaneous functions.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version. either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 * Copyright 2000,2006 The FreeRADIUS server project
26 #include <freeradius-devel/libradius.h>
32 #define FR_PUT_LE16(a, val)\
34 a[1] = ((uint16_t) (val)) >> 8;\
35 a[0] = ((uint16_t) (val)) & 0xff;\
38 bool fr_dns_lookups = false; /* IP -> hostname lookups? */
39 bool fr_hostname_lookups = true; /* hostname -> IP lookups? */
40 int fr_debug_flag = 0;
42 static char const *months[] = {
43 "jan", "feb", "mar", "apr", "may", "jun",
44 "jul", "aug", "sep", "oct", "nov", "dec" };
46 fr_thread_local_setup(char *, fr_inet_ntop_buffer) /* macro */
48 typedef struct fr_talloc_link {
53 /** Sets a signal handler using sigaction if available, else signal
55 * @param sig to set handler for.
56 * @param func handler to set.
58 int fr_set_signal(int sig, sig_t func)
63 memset(&act, 0, sizeof(act));
65 sigemptyset(&act.sa_mask);
66 act.sa_handler = func;
68 if (sigaction(sig, &act, NULL) < 0) {
69 fr_strerror_printf("Failed setting signal %i handler via sigaction(): %s", sig, fr_syserror(errno));
73 if (signal(sig, func) < 0) {
74 fr_strerror_printf("Failed setting signal %i handler via signal(): %s", sig, fr_syserror(errno));
81 static int _fr_trigger_talloc_ctx_free(fr_talloc_link_t *trigger)
83 if (trigger->armed) talloc_free(trigger->child);
88 static int _fr_disarm_talloc_ctx_free(bool **armed)
94 /** Link a parent and a child context, so the child is freed before the parent
96 * @note This is not thread safe. Do not free parent before threads are joined, do not call from a child thread.
97 * @note It's OK to free the child before threads are joined, but this will leak memory until the parent is freed.
99 * @param parent who's fate the child should share.
100 * @param child bound to parent's lifecycle.
101 * @return 0 on success -1 on failure.
103 int fr_link_talloc_ctx_free(TALLOC_CTX *parent, TALLOC_CTX *child)
105 fr_talloc_link_t *trigger;
108 trigger = talloc(parent, fr_talloc_link_t);
109 if (!trigger) return -1;
111 disarm = talloc(child, bool *);
113 talloc_free(trigger);
117 trigger->child = child;
118 trigger->armed = true;
119 *disarm = &trigger->armed;
121 talloc_set_destructor(trigger, _fr_trigger_talloc_ctx_free);
122 talloc_set_destructor(disarm, _fr_disarm_talloc_ctx_free);
128 * Explicitly cleanup the memory allocated to the error inet_ntop
131 static void _fr_inet_ntop_free(void *arg)
136 /** Wrapper around inet_ntop, prints IPv4/IPv6 addresses
138 * inet_ntop requires the caller pass in a buffer for the address.
139 * This would be annoying and cumbersome, seeing as quite often the ASCII
140 * address is only used for logging output.
142 * So as with lib/log.c use TLS to allocate thread specific buffers, and
143 * write the IP address there instead.
145 * @param af address family, either AF_INET or AF_INET6.
146 * @param src pointer to network address structure.
147 * @return NULL on error, else pointer to ASCII buffer containing text version of address.
149 char const *fr_inet_ntop(int af, void const *src)
157 buffer = fr_thread_local_init(fr_inet_ntop_buffer, _fr_inet_ntop_free);
162 * malloc is thread safe, talloc is not
164 buffer = malloc(sizeof(char) * INET6_ADDRSTRLEN);
166 fr_perror("Failed allocating memory for inet_ntop buffer");
170 ret = fr_thread_local_set(fr_inet_ntop_buffer, buffer);
172 fr_perror("Failed setting up TLS for inet_ntop buffer: %s", fr_syserror(ret));
179 return inet_ntop(af, src, buffer, INET6_ADDRSTRLEN);
183 * Return an IP address in standard dot notation
187 char const *ip_ntoa(char *buffer, uint32_t ipaddr)
189 ipaddr = ntohl(ipaddr);
191 sprintf(buffer, "%d.%d.%d.%d",
192 (ipaddr >> 24) & 0xff,
193 (ipaddr >> 16) & 0xff,
194 (ipaddr >> 8) & 0xff,
199 /** Parse an IPv4 address or IPv4 prefix in presentation format (and others)
201 * @param out Where to write the ip address value.
202 * @param value to parse, may be dotted quad [+ prefix], or integer, or octal number, or '*' (INADDR_ANY).
203 * @param inlen Length of value, if value is \0 terminated inlen may be -1.
204 * @param resolve If true and value doesn't look like an IP address, try and resolve value as a hostname.
205 * @param fallback to IPv6 resolution if no A records can be found.
206 * @return 0 if ip address was parsed successfully, else -1 on error.
208 int fr_pton4(fr_ipaddr_t *out, char const *value, ssize_t inlen, bool resolve, bool fallback)
214 /* Dotted quad + / + [0-9]{1,2} */
215 char buffer[INET_ADDRSTRLEN + 3];
218 * Copy to intermediary buffer if we were given a length
221 if (inlen >= (ssize_t)sizeof(buffer)) {
222 fr_strerror_printf("Invalid IPv4 address string \"%s\"", value);
225 memcpy(buffer, value, inlen);
226 buffer[inlen] = '\0';
229 p = strchr(value, '/');
231 * 192.0.2.2 is parsed as if it was /32
238 * Allow '*' as the wildcard address usually 0.0.0.0
240 if ((value[0] == '*') && (value[1] == '\0')) {
241 out->ipaddr.ip4addr.s_addr = htonl(INADDR_ANY);
243 * Convert things which are obviously integers to IP addresses
245 * We assume the number is the bigendian representation of the
248 } else if (is_integer(value) || ((value[0] == '0') && (value[1] == 'x'))) {
249 out->ipaddr.ip4addr.s_addr = htonl(strtoul(value, NULL, 0));
250 } else if (!resolve) {
251 if (inet_pton(AF_INET, value, &out->ipaddr.ip4addr.s_addr) <= 0) {
252 fr_strerror_printf("Failed to parse IPv4 address string \"%s\"", value);
255 } else if (ip_hton(out, AF_INET, value, fallback) < 0) return -1;
261 * Otherwise parse the prefix
263 if ((size_t)(p - value) >= INET_ADDRSTRLEN) {
264 fr_strerror_printf("Invalid IPv4 address string \"%s\"", value);
269 * Copy the IP portion into a temporary buffer if we haven't already.
271 if (inlen < 0) memcpy(buffer, value, p - value);
272 buffer[p - value] = '\0';
275 if (inet_pton(AF_INET, buffer, &out->ipaddr.ip4addr.s_addr) <= 0) {
276 fr_strerror_printf("Failed to parse IPv4 address string \"%s\"", value);
279 } else if (ip_hton(out, AF_INET, buffer, fallback) < 0) return -1;
281 prefix = strtoul(p + 1, &eptr, 10);
283 fr_strerror_printf("Invalid IPv4 mask length \"%s\". Should be between 0-32", p);
286 if (eptr[0] != '\0') {
287 fr_strerror_printf("Failed to parse IPv4 address string \"%s\", "
288 "got garbage after mask length \"%s\"", value, eptr);
293 out->ipaddr.ip4addr = fr_inaddr_mask(&out->ipaddr.ip4addr, prefix);
296 out->prefix = (uint8_t) prefix;
302 /** Parse an IPv6 address or IPv6 prefix in presentation format (and others)
304 * @param out Where to write the ip address value.
305 * @param value to parse.
306 * @param inlen Length of value, if value is \0 terminated inlen may be -1.
307 * @param resolve If true and value doesn't look like an IP address, try and resolve value as a hostname.
308 * @param fallback to IPv4 resolution if no AAAA records can be found.
309 * @return 0 if ip address was parsed successfully, else -1 on error.
311 int fr_pton6(fr_ipaddr_t *out, char const *value, ssize_t inlen, bool resolve, bool fallback)
317 /* IPv6 + / + [0-9]{1,3} */
318 char buffer[INET6_ADDRSTRLEN + 4];
321 * Copy to intermediary buffer if we were given a length
324 if (inlen >= (ssize_t)sizeof(buffer)) {
325 fr_strerror_printf("Invalid IPv6 address string \"%s\"", value);
328 memcpy(buffer, value, inlen);
329 buffer[inlen] = '\0';
332 p = strchr(value, '/');
338 * Allow '*' as the wildcard address
340 if ((value[0] == '*') && (value[1] == '\0')) {
341 memset(out->ipaddr.ip6addr.s6_addr, 0, sizeof(out->ipaddr.ip6addr.s6_addr));
342 } else if (!resolve) {
343 if (inet_pton(AF_INET6, value, out->ipaddr.ip6addr.s6_addr) <= 0) {
344 fr_strerror_printf("Failed to parse IPv6 address string \"%s\"", value);
347 } else if (ip_hton(out, AF_INET6, value, fallback) < 0) return -1;
352 if ((p - value) >= INET6_ADDRSTRLEN) {
353 fr_strerror_printf("Invalid IPv6 address string \"%s\"", value);
358 * Copy string to temporary buffer if we didn't do it earlier
360 if (inlen < 0) memcpy(buffer, value, p - value);
361 buffer[p - value] = '\0';
364 if (inet_pton(AF_INET6, buffer, out->ipaddr.ip6addr.s6_addr) <= 0) {
365 fr_strerror_printf("Failed to parse IPv6 address string \"%s\"", value);
368 } else if (ip_hton(out, AF_INET6, buffer, fallback) < 0) return -1;
370 prefix = strtoul(p + 1, &eptr, 10);
372 fr_strerror_printf("Invalid IPv6 mask length \"%s\". Should be between 0-128", p);
375 if (eptr[0] != '\0') {
376 fr_strerror_printf("Failed to parse IPv6 address string \"%s\", "
377 "got garbage after mask length \"%s\"", value, eptr);
382 struct in6_addr addr;
384 addr = fr_in6addr_mask(&out->ipaddr.ip6addr, prefix);
385 memcpy(out->ipaddr.ip6addr.s6_addr, addr.s6_addr, sizeof(out->ipaddr.ip6addr.s6_addr));
388 out->prefix = (uint8_t) prefix;
394 /** Simple wrapper to decide whether an IP value is v4 or v6 and call the appropriate parser.
396 * @param out Where to write the ip address value.
397 * @param value to parse.
398 * @param inlen Length of value, if value is \0 terminated inlen may be -1.
399 * @param resolve If true and value doesn't look like an IP address, try and resolve value as a hostname.
400 * @return 0 if ip address was parsed successfully, else -1 on error.
402 int fr_pton(fr_ipaddr_t *out, char const *value, ssize_t inlen, bool resolve)
406 len = (inlen >= 0) ? (size_t)inlen : strlen(value);
407 for (i = 0; i < len; i++) switch (value[i]) {
409 * Chars illegal in domain names and IPv4 addresses.
410 * Must be v6 and cannot be a domain.
415 return fr_pton6(out, value, inlen, false, false);
418 * Chars which don't really tell us anything
426 * Outside the range of IPv4 chars, must be a domain
427 * Use A record in preference to AAAA record.
429 if ((value[i] < '0') || (value[i] > '9')) {
430 if (!resolve) return -1;
431 return fr_pton4(out, value, inlen, true, true);
437 * All chars were in the IPv4 set [0-9/.], must be an IPv4
440 return fr_pton4(out, value, inlen, false, false);
443 int fr_ntop(char *out, size_t outlen, fr_ipaddr_t *addr)
445 char buffer[INET6_ADDRSTRLEN];
447 if (inet_ntop(addr->af, &(addr->ipaddr), buffer, sizeof(buffer)) == NULL) return -1;
449 return snprintf(out, outlen, "%s/%i", buffer, addr->prefix);
453 * Internal wrapper for locking, to minimize the number of ifdef's
457 int rad_lockfd(int fd, int lock_len)
466 fl.l_whence = SEEK_CUR;
468 return fcntl(fd, F_SETLKW, (void *)&fl);
470 #error "missing definition for F_WRLCK, all file locks will fail"
477 * Internal wrapper for locking, to minimize the number of ifdef's
479 * Lock an fd, prefer lockf() over flock()
480 * Nonblocking version.
482 int rad_lockfd_nonblock(int fd, int lock_len)
491 fl.l_whence = SEEK_CUR;
493 return fcntl(fd, F_SETLK, (void *)&fl);
495 #error "missing definition for F_WRLCK, all file locks will fail"
502 * Internal wrapper for unlocking, to minimize the number of ifdef's
505 * Unlock an fd, prefer lockf() over flock()
507 int rad_unlockfd(int fd, int lock_len)
516 fl.l_whence = SEEK_CUR;
518 return fcntl(fd, F_UNLCK, (void *)&fl);
520 #error "missing definition for F_WRLCK, all file locks will fail"
527 * Return an interface-id in standard colon notation
529 char *ifid_ntoa(char *buffer, size_t size, uint8_t const *ifid)
531 snprintf(buffer, size, "%x:%x:%x:%x",
532 (ifid[0] << 8) + ifid[1], (ifid[2] << 8) + ifid[3],
533 (ifid[4] << 8) + ifid[5], (ifid[6] << 8) + ifid[7]);
539 * Return an interface-id from
540 * one supplied in standard colon notation.
542 uint8_t *ifid_aton(char const *ifid_str, uint8_t *ifid)
544 static char const xdigits[] = "0123456789abcdef";
546 int num_id = 0, val = 0, idx = 0;
548 for (p = ifid_str; ; ++p) {
549 if (*p == ':' || *p == '\0') {
554 * Drop 'val' into the array.
556 ifid[idx] = (val >> 8) & 0xff;
557 ifid[idx + 1] = val & 0xff;
560 * Must have all entries before
571 } else if ((pch = strchr(xdigits, tolower(*p))) != NULL) {
575 * Dumb version of 'scanf'
578 val |= (pch - xdigits);
586 #ifndef HAVE_INET_PTON
587 static int inet_pton4(char const *src, struct in_addr *dst)
593 static char const digits[] = "0123456789";
599 while (*p && ((off = strchr(digits, *p)) != NULL)) {
601 num += (off - digits);
603 if (num > 255) return 0;
610 * Not a digit, MUST be a dot, else we
622 * End of the string. At the fourth
623 * octet is OK, anything else is an
631 memcpy(dst, &tmp, sizeof(tmp));
636 #ifdef HAVE_STRUCT_SOCKADDR_IN6
638 * inet_pton6(src, dst)
639 * convert presentation level address to network order binary form.
641 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
643 * (1) does not touch `dst' unless it's returning 1.
644 * (2) :: in a full address is silently ignored.
646 * inspired by Mark Andrews.
650 static int inet_pton6(char const *src, unsigned char *dst)
652 static char const xdigits_l[] = "0123456789abcdef",
653 xdigits_u[] = "0123456789ABCDEF";
654 u_char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
655 char const *xdigits, *curtok;
659 memset((tp = tmp), 0, IN6ADDRSZ);
660 endp = tp + IN6ADDRSZ;
662 /* Leading :: requires some special handling. */
669 while ((ch = *src++) != '\0') {
672 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
673 pch = strchr((xdigits = xdigits_u), ch);
676 val |= (pch - xdigits);
690 if (tp + INT16SZ > endp)
692 *tp++ = (u_char) (val >> 8) & 0xff;
693 *tp++ = (u_char) val & 0xff;
698 if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
699 inet_pton4(curtok, (struct in_addr *) tp) > 0) {
702 break; /* '\0' was seen by inet_pton4(). */
707 if (tp + INT16SZ > endp)
709 *tp++ = (u_char) (val >> 8) & 0xff;
710 *tp++ = (u_char) val & 0xff;
712 if (colonp != NULL) {
714 * Since some memmove()'s erroneously fail to handle
715 * overlapping regions, we'll do the shift by hand.
717 int const n = tp - colonp;
720 for (i = 1; i <= n; i++) {
721 endp[- i] = colonp[n - i];
728 /* bcopy(tmp, dst, IN6ADDRSZ); */
729 memcpy(dst, tmp, IN6ADDRSZ);
735 * Utility function, so that the rest of the server doesn't
736 * have ifdef's around IPv6 support
738 int inet_pton(int af, char const *src, void *dst)
741 return inet_pton4(src, dst);
743 #ifdef HAVE_STRUCT_SOCKADDR_IN6
745 if (af == AF_INET6) {
746 return inet_pton6(src, dst);
754 #ifndef HAVE_INET_NTOP
756 * Utility function, so that the rest of the server doesn't
757 * have ifdef's around IPv6 support
759 char const *inet_ntop(int af, void const *src, char *dst, size_t cnt)
762 uint8_t const *ipaddr = src;
764 if (cnt <= INET_ADDRSTRLEN) return NULL;
766 snprintf(dst, cnt, "%d.%d.%d.%d",
767 ipaddr[0], ipaddr[1],
768 ipaddr[2], ipaddr[3]);
773 * If the system doesn't define this, we define it
776 if (af == AF_INET6) {
777 struct in6_addr const *ipaddr = src;
779 if (cnt <= INET6_ADDRSTRLEN) return NULL;
781 snprintf(dst, cnt, "%x:%x:%x:%x:%x:%x:%x:%x",
782 (ipaddr->s6_addr[0] << 8) | ipaddr->s6_addr[1],
783 (ipaddr->s6_addr[2] << 8) | ipaddr->s6_addr[3],
784 (ipaddr->s6_addr[4] << 8) | ipaddr->s6_addr[5],
785 (ipaddr->s6_addr[6] << 8) | ipaddr->s6_addr[7],
786 (ipaddr->s6_addr[8] << 8) | ipaddr->s6_addr[9],
787 (ipaddr->s6_addr[10] << 8) | ipaddr->s6_addr[11],
788 (ipaddr->s6_addr[12] << 8) | ipaddr->s6_addr[13],
789 (ipaddr->s6_addr[14] << 8) | ipaddr->s6_addr[15]);
793 return NULL; /* don't support IPv6 */
797 /** Wrappers for IPv4/IPv6 host to IP address lookup
799 * This function returns only one IP address, of the specified address family,
800 * or the first address (of whatever family), if AF_UNSPEC is used.
802 * If fallback is specified and af is AF_INET, but no AF_INET records were
803 * found and a record for AF_INET6 exists that record will be returned.
805 * If fallback is specified and af is AF_INET6, and a record with AF_INET4 exists
806 * that record will be returned instead.
808 * @param out Where to write result.
809 * @param af To search for in preference.
810 * @param hostname to search for.
811 * @param fallback to the other adress family, if no records matching af, found.
812 * @return 0 on success, else -1 on failure.
814 int ip_hton(fr_ipaddr_t *out, int af, char const *hostname, bool fallback)
817 struct addrinfo hints, *ai = NULL, *alt = NULL, *res = NULL;
820 * Avoid malloc for IP addresses. This helps us debug
821 * memory errors when using talloc.
826 if (!fr_hostname_lookups) {
828 #ifdef HAVE_STRUCT_SOCKADDR_IN6
829 if (af == AF_UNSPEC) {
832 for (p = hostname; *p != '\0'; p++) {
843 if (af == AF_UNSPEC) af = AF_INET;
845 if (!inet_pton(af, hostname, &(out->ipaddr))) return -1;
851 memset(&hints, 0, sizeof(hints));
854 * If we're falling back we need both IPv4 and IPv6 records
857 hints.ai_family = AF_UNSPEC;
859 hints.ai_family = af;
862 if ((rcode = getaddrinfo(hostname, NULL, &hints, &res)) != 0) {
866 fr_strerror_printf("Failed resolving \"%s\" to IP address: %s",
867 hostname, gai_strerror(rcode));
871 fr_strerror_printf("Failed resolving \"%s\" to IPv4 address: %s",
872 hostname, gai_strerror(rcode));
876 fr_strerror_printf("Failed resolving \"%s\" to IPv6 address: %s",
877 hostname, gai_strerror(rcode));
882 for (ai = res; ai; ai = ai->ai_next) {
883 if ((af == ai->ai_family) || (af == AF_UNSPEC)) break;
884 if (!alt && fallback && ((ai->ai_family == AF_INET) || (ai->ai_family == AF_INET6))) alt = ai;
889 fr_strerror_printf("ip_hton failed to find requested information for host %.100s", hostname);
894 rcode = fr_sockaddr2ipaddr((struct sockaddr_storage *)ai->ai_addr,
895 ai->ai_addrlen, out, NULL);
897 if (!rcode) return -1;
903 * Look IP addresses up, and print names (depending on DNS config)
905 char const *ip_ntoh(fr_ipaddr_t const *src, char *dst, size_t cnt)
907 struct sockaddr_storage ss;
914 if (!fr_dns_lookups) {
915 return inet_ntop(src->af, &(src->ipaddr), dst, cnt);
918 if (!fr_ipaddr2sockaddr(src, 0, &ss, &salen)) {
922 if ((error = getnameinfo((struct sockaddr *)&ss, salen, dst, cnt, NULL, 0,
923 NI_NUMERICHOST | NI_NUMERICSERV)) != 0) {
924 fr_strerror_printf("ip_ntoh: %s", gai_strerror(error));
930 /** Mask off a portion of an IPv4 address
932 * @param ipaddr to mask.
933 * @param prefix Number of contiguous bits to mask.
934 * @return an ipv4 address with the host portion zeroed out.
936 struct in_addr fr_inaddr_mask(struct in_addr const *ipaddr, uint8_t prefix)
940 if (prefix > 32) prefix = 32;
943 if (prefix == 32) return *ipaddr;
945 if (prefix == 0) ret = 0;
946 else ret = htonl(~((0x00000001UL << (32 - prefix)) - 1)) & ipaddr->s_addr;
948 return (*(struct in_addr *)&ret);
951 /** Mask off a portion of an IPv6 address
953 * @param ipaddr to mask.
954 * @param prefix Number of contiguous bits to mask.
955 * @return an ipv6 address with the host portion zeroed out.
957 struct in6_addr fr_in6addr_mask(struct in6_addr const *ipaddr, uint8_t prefix)
959 uint64_t const *p = (uint64_t const *) ipaddr;
960 uint64_t ret[2], *o = ret;
962 if (prefix > 128) prefix = 128;
965 if (prefix == 128) return *ipaddr;
969 *o++ = 0xffffffffffffffffULL & *p++; /* lhs portion masked */
971 ret[1] = 0; /* rhs portion zeroed */
974 /* Max left shift is 63 else we get overflow */
976 *o = htonll(~((uint64_t)(0x0000000000000001ULL << (64 - prefix)) - 1)) & *p;
981 return *(struct in6_addr *) &ret;
984 /** Zeroes out the host portion of an fr_ipaddr_t
986 * @param[in,out] addr to mask
987 * @param[in] prefix Length of the network portion.
989 void fr_ipaddr_mask(fr_ipaddr_t *addr, uint8_t prefix)
994 addr->ipaddr.ip4addr = fr_inaddr_mask(&addr->ipaddr.ip4addr, prefix);
998 addr->ipaddr.ip6addr = fr_in6addr_mask(&addr->ipaddr.ip6addr, prefix);
1004 addr->prefix = prefix;
1007 static char const hextab[] = "0123456789abcdef";
1009 /** Convert hex strings to binary data
1011 * @param bin Buffer to write output to.
1012 * @param outlen length of output buffer (or length of input string / 2).
1013 * @param hex input string.
1014 * @param inlen length of the input string
1015 * @return length of data written to buffer.
1017 size_t fr_hex2bin(uint8_t *bin, size_t outlen, char const *hex, size_t inlen)
1024 * Smartly truncate output, caller should check number of bytes
1028 if (len > outlen) len = outlen;
1030 for (i = 0; i < len; i++) {
1031 if(!(c1 = memchr(hextab, tolower((int) hex[i << 1]), sizeof(hextab))) ||
1032 !(c2 = memchr(hextab, tolower((int) hex[(i << 1) + 1]), sizeof(hextab))))
1034 bin[i] = ((c1-hextab)<<4) + (c2-hextab);
1040 /** Convert binary data to a hex string
1042 * Ascii encoded hex string will not be prefixed with '0x'
1044 * @warning If the output buffer isn't long enough, we have a buffer overflow.
1046 * @param[out] hex Buffer to write hex output.
1047 * @param[in] bin input.
1048 * @param[in] inlen of bin input.
1049 * @return length of data written to buffer.
1051 size_t fr_bin2hex(char *hex, uint8_t const *bin, size_t inlen)
1055 for (i = 0; i < inlen; i++) {
1056 hex[0] = hextab[((*bin) >> 4) & 0x0f];
1057 hex[1] = hextab[*bin & 0x0f];
1066 /** Convert binary data to a hex string
1068 * Ascii encoded hex string will not be prefixed with '0x'
1070 * @param[in] ctx to alloc buffer in.
1071 * @param[in] bin input.
1072 * @param[in] inlen of bin input.
1073 * @return length of data written to buffer.
1075 char *fr_abin2hex(TALLOC_CTX *ctx, uint8_t const *bin, size_t inlen)
1079 buff = talloc_array(ctx, char, (inlen << 2));
1080 if (!buff) return NULL;
1082 fr_bin2hex(buff, bin, inlen);
1087 /** Consume the integer (or hex) portion of a value string
1089 * @param value string to parse.
1090 * @param end pointer to the first non numeric char.
1091 * @return integer value.
1093 uint32_t fr_strtoul(char const *value, char **end)
1095 if ((value[0] == '0') && (value[1] == 'x')) {
1096 return strtoul(value, end, 16);
1099 return strtoul(value, end, 10);
1102 /** Check whether the string is all whitespace
1104 * @return true if the entirety of the string is whitespace, else false.
1106 bool is_whitespace(char const *value)
1109 if (!isspace(*value)) return false;
1115 /** Check whether the string is all numbers
1117 * @return true if the entirety of the string is are numebrs, else false.
1119 bool is_integer(char const *value)
1122 if (!isdigit(*value)) return false;
1128 /** Check whether the string is allzeros
1130 * @return true if the entirety of the string is are numebrs, else false.
1132 bool is_zero(char const *value)
1135 if (*value != '0') return false;
1142 * So we don't have ifdef's in the rest of the code
1144 #ifndef HAVE_CLOSEFROM
1145 int closefrom(int fd)
1151 maxfd = sysconf(_SC_OPEN_MAX);
1157 if (fd > maxfd) return 0;
1160 * FIXME: return EINTR?
1164 for (i = fd; i < maxfd; i++) {
1172 int fr_ipaddr_cmp(fr_ipaddr_t const *a, fr_ipaddr_t const *b)
1174 if (a->af < b->af) return -1;
1175 if (a->af > b->af) return +1;
1177 if (a->prefix < b->prefix) return -1;
1178 if (a->prefix > b->prefix) return +1;
1182 return memcmp(&a->ipaddr.ip4addr,
1184 sizeof(a->ipaddr.ip4addr));
1186 #ifdef HAVE_STRUCT_SOCKADDR_IN6
1188 if (a->scope < b->scope) return -1;
1189 if (a->scope > b->scope) return +1;
1191 return memcmp(&a->ipaddr.ip6addr,
1193 sizeof(a->ipaddr.ip6addr));
1203 int fr_ipaddr2sockaddr(fr_ipaddr_t const *ipaddr, uint16_t port,
1204 struct sockaddr_storage *sa, socklen_t *salen)
1206 memset(sa, 0, sizeof(*sa));
1208 if (ipaddr->af == AF_INET) {
1209 struct sockaddr_in s4;
1211 *salen = sizeof(s4);
1213 memset(&s4, 0, sizeof(s4));
1214 s4.sin_family = AF_INET;
1215 s4.sin_addr = ipaddr->ipaddr.ip4addr;
1216 s4.sin_port = htons(port);
1217 memset(sa, 0, sizeof(*sa));
1218 memcpy(sa, &s4, sizeof(s4));
1220 #ifdef HAVE_STRUCT_SOCKADDR_IN6
1221 } else if (ipaddr->af == AF_INET6) {
1222 struct sockaddr_in6 s6;
1224 *salen = sizeof(s6);
1226 memset(&s6, 0, sizeof(s6));
1227 s6.sin6_family = AF_INET6;
1228 s6.sin6_addr = ipaddr->ipaddr.ip6addr;
1229 s6.sin6_port = htons(port);
1230 s6.sin6_scope_id = ipaddr->scope;
1231 memset(sa, 0, sizeof(*sa));
1232 memcpy(sa, &s6, sizeof(s6));
1242 int fr_sockaddr2ipaddr(struct sockaddr_storage const *sa, socklen_t salen,
1243 fr_ipaddr_t *ipaddr, uint16_t *port)
1245 memset(ipaddr, 0, sizeof(*ipaddr));
1247 if (sa->ss_family == AF_INET) {
1248 struct sockaddr_in s4;
1250 if (salen < sizeof(s4)) {
1251 fr_strerror_printf("IPv4 address is too small");
1255 memcpy(&s4, sa, sizeof(s4));
1256 ipaddr->af = AF_INET;
1257 ipaddr->prefix = 32;
1258 ipaddr->ipaddr.ip4addr = s4.sin_addr;
1259 if (port) *port = ntohs(s4.sin_port);
1261 #ifdef HAVE_STRUCT_SOCKADDR_IN6
1262 } else if (sa->ss_family == AF_INET6) {
1263 struct sockaddr_in6 s6;
1265 if (salen < sizeof(s6)) {
1266 fr_strerror_printf("IPv6 address is too small");
1270 memcpy(&s6, sa, sizeof(s6));
1271 ipaddr->af = AF_INET6;
1272 ipaddr->prefix = 128;
1273 ipaddr->ipaddr.ip6addr = s6.sin6_addr;
1274 if (port) *port = ntohs(s6.sin6_port);
1275 ipaddr->scope = s6.sin6_scope_id;
1279 fr_strerror_printf("Unsupported address famility %d",
1287 /** Convert UTF8 string to UCS2 encoding
1289 * @note Borrowed from src/crypto/ms_funcs.c of wpa_supplicant project (http://hostap.epitest.fi/wpa_supplicant/)
1291 * @param[out] out Where to write the ucs2 string.
1292 * @param[in] outlen Size of output buffer.
1293 * @param[in] in UTF8 string to convert.
1294 * @param[in] inlen length of UTF8 string.
1295 * @return the size of the UCS2 string written to the output buffer (in bytes).
1297 ssize_t fr_utf8_to_ucs2(uint8_t *out, size_t outlen, char const *in, size_t inlen)
1300 uint8_t *start = out;
1302 for (i = 0; i < inlen; i++) {
1306 if ((size_t)(out - start) >= outlen) {
1307 /* input too long */
1311 /* One-byte encoding */
1313 FR_PUT_LE16(out, c);
1316 } else if ((i == (inlen - 1)) || ((size_t)(out - start) >= (outlen - 1))) {
1317 /* Incomplete surrogate */
1322 /* Two-byte encoding */
1323 if ((c & 0xe0) == 0xc0) {
1324 FR_PUT_LE16(out, ((c & 0x1f) << 6) | (c2 & 0x3f));
1328 if ((i == inlen) || ((size_t)(out - start) >= (outlen - 1))) {
1329 /* Incomplete surrogate */
1333 /* Three-byte encoding */
1335 FR_PUT_LE16(out, ((c & 0xf) << 12) | ((c2 & 0x3f) << 6) | (c3 & 0x3f));
1342 /** Write 128bit unsigned integer to buffer
1344 * @author Alexey Frunze
1346 * @param out where to write result to.
1347 * @param outlen size of out.
1348 * @param num 128 bit integer.
1350 size_t fr_prints_uint128(char *out, size_t outlen, uint128_t const num)
1352 char buff[128 / 3 + 1 + 1];
1356 #ifdef RADIUS_LITTLE_ENDIAN
1364 memset(buff, '0', sizeof(buff) - 1);
1365 buff[sizeof(buff) - 1] = '\0';
1367 memcpy(n, &num, sizeof(n));
1369 for (i = 0; i < 128; i++) {
1373 carry = (n[h] >= 0x8000000000000000);
1375 // Shift n[] left, doubling it
1376 n[h] = ((n[h] << 1) & 0xffffffffffffffff) + (n[l] >= 0x8000000000000000);
1377 n[l] = ((n[l] << 1) & 0xffffffffffffffff);
1379 // Add s[] to itself in decimal, doubling it
1380 for (j = sizeof(buff) - 2; j >= 0; j--) {
1381 buff[j] += buff[j] - '0' + carry;
1382 carry = (buff[j] > '9');
1389 while ((*p == '0') && (p < &buff[sizeof(buff) - 2])) {
1393 return strlcpy(out, p, outlen);
1397 * Sort of strtok/strsep function.
1399 static char *mystrtok(char **ptr, char const *sep)
1407 while (**ptr && strchr(sep, **ptr)) {
1415 while (**ptr && strchr(sep, **ptr) == NULL) {
1425 /** Convert string in various formats to a time_t
1427 * @param date_str input date string.
1428 * @param date time_t to write result to.
1429 * @return 0 on success or -1 on error.
1431 int fr_get_time(char const *date_str, time_t *date)
1435 struct tm *tm, s_tm;
1442 * Test for unix timestamp date
1444 *date = strtoul(date_str, &tail, 10);
1445 if (*tail == '\0') {
1450 memset(tm, 0, sizeof(*tm));
1451 tm->tm_isdst = -1; /* don't know, and don't care about DST */
1453 strlcpy(buf, date_str, sizeof(buf));
1456 f[0] = mystrtok(&p, " \t");
1457 f[1] = mystrtok(&p, " \t");
1458 f[2] = mystrtok(&p, " \t");
1459 f[3] = mystrtok(&p, " \t"); /* may, or may not, be present */
1460 if (!f[0] || !f[1] || !f[2]) return -1;
1463 * The time has a colon, where nothing else does.
1464 * So if we find it, bubble it to the back of the list.
1467 for (i = 0; i < 3; i++) {
1468 if (strchr(f[i], ':')) {
1478 * The month is text, which allows us to find it easily.
1481 for (i = 0; i < 3; i++) {
1482 if (isalpha( (int) *f[i])) {
1484 * Bubble the month to the front of the list
1490 for (i = 0; i < 12; i++) {
1491 if (strncasecmp(months[i], f[0], 3) == 0) {
1499 /* month not found? */
1500 if (tm->tm_mon == 12) return -1;
1503 * The year may be in f[1], or in f[2]
1505 tm->tm_year = atoi(f[1]);
1506 tm->tm_mday = atoi(f[2]);
1508 if (tm->tm_year >= 1900) {
1509 tm->tm_year -= 1900;
1513 * We can't use 2-digit years any more, they make it
1514 * impossible to tell what's the day, and what's the year.
1516 if (tm->tm_mday < 1900) return -1;
1519 * Swap the year and the day.
1522 tm->tm_year = tm->tm_mday - 1900;
1527 * If the day is out of range, die.
1529 if ((tm->tm_mday < 1) || (tm->tm_mday > 31)) {
1534 * There may be %H:%M:%S. Parse it in a hacky way.
1537 f[0] = f[3]; /* HH */
1538 f[1] = strchr(f[0], ':'); /* find : separator */
1539 if (!f[1]) return -1;
1541 *(f[1]++) = '\0'; /* nuke it, and point to MM:SS */
1543 f[2] = strchr(f[1], ':'); /* find : separator */
1545 *(f[2]++) = '\0'; /* nuke it, and point to SS */
1546 tm->tm_sec = atoi(f[2]);
1547 } /* else leave it as zero */
1549 tm->tm_hour = atoi(f[0]);
1550 tm->tm_min = atoi(f[1]);
1554 * Returns -1 on error.
1557 if (t == (time_t) -1) return -1;
1564 /** Compares two pointers
1566 * @param a first pointer to compare.
1567 * @param b second pointer to compare.
1568 * @return -1 if a < b, +1 if b > a, or 0 if both equal.
1570 int8_t fr_pointer_cmp(void const *a, void const *b)
1572 if (a < b) return -1;
1573 if (a == b) return 0;
1578 static int _quick_partition(void const *to_sort[], int min, int max, fr_cmp_t cmp) {
1579 void const *pivot = to_sort[min];
1585 do ++i; while((cmp(to_sort[i], pivot) <= 0) && i <= max);
1586 do --j; while(cmp(to_sort[j], pivot) > 0);
1591 to_sort[i] = to_sort[j];
1596 to_sort[min] = to_sort[j];
1602 /** Quick sort an array of pointers using a comparator
1604 * @param to_sort array of pointers to sort.
1605 * @param min_idx the lowest index (usually 0).
1606 * @param max_idx the highest index (usually length of array - 1).
1607 * @param cmp the comparison function to use to sort the array elements.
1609 void fr_quick_sort(void const *to_sort[], int min_idx, int max_idx, fr_cmp_t cmp)
1613 if (min_idx >= max_idx) return;
1615 part = _quick_partition(to_sort, min_idx, max_idx, cmp);
1616 fr_quick_sort(to_sort, min_idx, part - 1, cmp);
1617 fr_quick_sort(to_sort, part + 1, max_idx, cmp);
1621 void fr_talloc_verify_cb(UNUSED const void *ptr, UNUSED int depth,
1622 UNUSED int max_depth, UNUSED int is_ref,
1623 UNUSED void *private_data)