diff options
Diffstat (limited to 'libs/libcurl/src/curlx/inet_pton.c')
| -rw-r--r-- | libs/libcurl/src/curlx/inet_pton.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/libs/libcurl/src/curlx/inet_pton.c b/libs/libcurl/src/curlx/inet_pton.c new file mode 100644 index 0000000000..0e32e129da --- /dev/null +++ b/libs/libcurl/src/curlx/inet_pton.c @@ -0,0 +1,232 @@ +/* This is from the BIND 4.9.4 release, modified to compile by itself */
+
+/* Copyright (c) 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.
+ *
+ * SPDX-License-Identifier: ISC
+ */
+
+#include "../curl_setup.h"
+#include "../curl_ctype.h"
+#include "strparse.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 USE_IPV6 is disabled, we still want to parse IPv6 addresses, so make
+ * sure we have _some_ value for AF_INET6 without polluting our fake value
+ * everywhere.
+ */
+#if !defined(USE_IPV6) && !defined(AF_INET6)
+#define AF_INET6 (AF_INET + 1)
+#endif
+
+/*
+ * WARNING: Do not 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);
+static int inet_pton6(const char *src, unsigned char *dst);
+
+/* 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 was not 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. When this function returns
+ * -1, check errno not SOCKERRNO.
+ * author:
+ * Paul Vixie, 1996.
+ */
+int
+curlx_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:
+ CURL_SETERRNO(SOCKEAFNOSUPPORT);
+ 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 is returning 1.
+ * author:
+ * Paul Vixie, 1996.
+ */
+static int
+inet_pton4(const char *src, unsigned char *dst)
+{
+ int saw_digit, octets, ch;
+ unsigned char tmp[INADDRSZ], *tp;
+
+ saw_digit = 0;
+ octets = 0;
+ tp = tmp;
+ *tp = 0;
+ while((ch = *src++) != '\0') {
+ if(ISDIGIT(ch)) {
+ unsigned int val = (*tp * 10) + (ch - '0');
+
+ 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;
+}
+
+/* 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 is 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)
+{
+ 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;
+ /* Leading :: requires some special handling. */
+ if(*src == ':')
+ if(*++src != ':')
+ return 0;
+ curtok = src;
+ saw_xdigit = 0;
+ val = 0;
+ while((ch = *src++) != '\0') {
+ if(ISXDIGIT(ch)) {
+ val <<= 4;
+ val |= Curl_hexval(ch);
+ 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) {
+ /*
+ * Since some memmove()'s erroneously fail to handle
+ * overlapping regions, we will 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 /* HAVE_INET_PTON */
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