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- #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
- #if !defined(ENABLE_IPV6) && !defined(AF_INET6)
- #define AF_INET6 (AF_INET + 1)
- #endif
- static int inet_pton4(const char *src, unsigned char *dst);
- static int inet_pton6(const char *src, unsigned char *dst);
- int
- Curl_inet_pton(int af, const char *src, void *dst)
- {
- switch(af) {
- case AF_INET:
- return (inet_pton4(src, (unsigned char *)dst));
- case AF_INET6:
- return (inet_pton6(src, (unsigned char *)dst));
- default:
- errno = EAFNOSUPPORT;
- return (-1);
- }
-
- }
- 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;
- pch = strchr(digits, ch);
- if(pch) {
- 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);
- }
- 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 *curtok;
- int ch, saw_xdigit;
- size_t val;
- memset((tp = tmp), 0, IN6ADDRSZ);
- endp = tp + IN6ADDRSZ;
- colonp = NULL;
-
- if(*src == ':')
- if(*++src != ':')
- return (0);
- curtok = src;
- saw_xdigit = 0;
- val = 0;
- while((ch = *src++) != '\0') {
- const char *xdigits;
- const char *pch;
- pch = strchr((xdigits = xdigits_l), ch);
- if(!pch)
- pch = strchr((xdigits = xdigits_u), ch);
- if(pch) {
- 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;
- }
- return (0);
- }
- if(saw_xdigit) {
- if(tp + INT16SZ > endp)
- return (0);
- *tp++ = (unsigned char) ((val >> 8) & 0xff);
- *tp++ = (unsigned char) (val & 0xff);
- }
- if(colonp) {
-
- 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
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