/* This is from the BIND 4.9.4 release, modified to compile by itself */ /* Copyright (c) 1996 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ #include "curl_setup.h" #ifndef HAVE_INET_PTON #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #ifdef HAVE_NETINET_IN_H #include <netinet/in.h> #endif #ifdef HAVE_ARPA_INET_H #include <arpa/inet.h> #endif #include "inet_pton.h" #define IN6ADDRSZ 16 #define INADDRSZ 4 #define INT16SZ 2 /* * WARNING: Don't even consider trying to compile this on a system where * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. */ static int inet_pton4(const char *src, unsigned char *dst); #ifdef ENABLE_IPV6 static int inet_pton6(const char *src, unsigned char *dst); #endif /* int * inet_pton(af, src, dst) * convert from presentation format (which usually means ASCII printable) * to network format (which is usually some kind of binary format). * return: * 1 if the address was valid for the specified address family * 0 if the address wasn't valid (`dst' is untouched in this case) * -1 if some other error occurred (`dst' is untouched in this case, too) * notice: * On Windows we store the error in the thread errno, not * in the winsock error code. This is to avoid losing the * actual last winsock error. So use macro ERRNO to fetch the * errno this function sets when returning (-1), not SOCKERRNO. * author: * Paul Vixie, 1996. */ int Curl_inet_pton(int af, const char *src, void *dst) { switch (af) { case AF_INET: return (inet_pton4(src, (unsigned char *)dst)); #ifdef ENABLE_IPV6 case AF_INET6: return (inet_pton6(src, (unsigned char *)dst)); #endif default: SET_ERRNO(EAFNOSUPPORT); return (-1); } /* NOTREACHED */ } /* int * inet_pton4(src, dst) * like inet_aton() but without all the hexadecimal and shorthand. * return: * 1 if `src' is a valid dotted quad, else 0. * notice: * does not touch `dst' unless it's returning 1. * author: * Paul Vixie, 1996. */ static int inet_pton4(const char *src, unsigned char *dst) { static const char digits[] = "0123456789"; int saw_digit, octets, ch; unsigned char tmp[INADDRSZ], *tp; saw_digit = 0; octets = 0; tp = tmp; *tp = 0; while((ch = *src++) != '\0') { const char *pch; if((pch = strchr(digits, ch)) != NULL) { unsigned int val = *tp * 10 + (unsigned int)(pch - digits); if(saw_digit && *tp == 0) return (0); if(val > 255) return (0); *tp = (unsigned char)val; if(! saw_digit) { if(++octets > 4) return (0); saw_digit = 1; } } else if(ch == '.' && saw_digit) { if(octets == 4) return (0); *++tp = 0; saw_digit = 0; } else return (0); } if(octets < 4) return (0); memcpy(dst, tmp, INADDRSZ); return (1); } #ifdef ENABLE_IPV6 /* int * inet_pton6(src, dst) * convert presentation level address to network order binary form. * return: * 1 if `src' is a valid [RFC1884 2.2] address, else 0. * notice: * (1) does not touch `dst' unless it's returning 1. * (2) :: in a full address is silently ignored. * credit: * inspired by Mark Andrews. * author: * Paul Vixie, 1996. */ static int inet_pton6(const char *src, unsigned char *dst) { static const char xdigits_l[] = "0123456789abcdef", xdigits_u[] = "0123456789ABCDEF"; unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp; const char *xdigits, *curtok; int ch, saw_xdigit; size_t val; memset((tp = tmp), 0, IN6ADDRSZ); endp = tp + IN6ADDRSZ; colonp = NULL; /* Leading :: requires some special handling. */ if(*src == ':') if(*++src != ':') return (0); curtok = src; saw_xdigit = 0; val = 0; while((ch = *src++) != '\0') { const char *pch; if((pch = strchr((xdigits = xdigits_l), ch)) == NULL) pch = strchr((xdigits = xdigits_u), ch); if(pch != NULL) { val <<= 4; val |= (pch - xdigits); if(++saw_xdigit > 4) return (0); continue; } if(ch == ':') { curtok = src; if(!saw_xdigit) { if(colonp) return (0); colonp = tp; continue; } if(tp + INT16SZ > endp) return (0); *tp++ = (unsigned char) (val >> 8) & 0xff; *tp++ = (unsigned char) (val & 0xff); saw_xdigit = 0; val = 0; continue; } if(ch == '.' && ((tp + INADDRSZ) <= endp) && inet_pton4(curtok, tp) > 0) { tp += INADDRSZ; saw_xdigit = 0; break; /* '\0' was seen by inet_pton4(). */ } return (0); } if(saw_xdigit) { if(tp + INT16SZ > endp) return (0); *tp++ = (unsigned char) (val >> 8) & 0xff; *tp++ = (unsigned char) (val & 0xff); } if(colonp != NULL) { /* * Since some memmove()'s erroneously fail to handle * overlapping regions, we'll do the shift by hand. */ const ssize_t n = tp - colonp; ssize_t i; if(tp == endp) return (0); for(i = 1; i <= n; i++) { *(endp - i) = *(colonp + n - i); *(colonp + n - i) = 0; } tp = endp; } if(tp != endp) return (0); memcpy(dst, tmp, IN6ADDRSZ); return (1); } #endif /* ENABLE_IPV6 */ #endif /* HAVE_INET_PTON */