examples/ipsec-secgw: use POSIX network address conversion

inet_pton4 and inet_pton6 was reimplemented. Replace implementation of
inet_pton4 and inet_pton6 with libc inet_pton function

Bugzilla ID: 365
Fixes: 0d547ed03717 ("examples/ipsec-secgw: support configuration file")

Reported-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ibtisam Tariq <ibtisam.tariq@emumba.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: David Marchand <david.marchand@redhat.com>

diff --git a/examples/ipsec-secgw/parser.c b/examples/ipsec-secgw/parser.c
index 8f66660..9069129 100644 (file)
--- a/examples/ipsec-secgw/parser.c
+++ b/examples/ipsec-secgw/parser.c
@@ -1,6 +1,9 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  * Copyright(c) 2016 Intel Corporation
  */
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
 #include <rte_common.h>
 #include <rte_crypto.h>
 #include <rte_string_fns.h>
@@ -40,172 +43,6 @@ parse_tokenize_string(char *string, char *tokens[], uint32_t *n_tokens)
        return 0;
 }
 
-#define INADDRSZ 4
-#define IN6ADDRSZ 16
-
-/* 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) = 0;
-       while ((ch = *src++) != '\0') {
-               const char *pch;
-
-               pch = strchr(digits, ch);
-               if (pch != NULL) {
-                       unsigned int new = *tp * 10 + (pch - digits);
-
-                       if (new > 255)
-                               return 0;
-                       if (!saw_digit) {
-                               if (++octets > 4)
-                                       return 0;
-                               saw_digit = 1;
-                       }
-                       *tp = (unsigned char)new;
-               } 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'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 = 0, *endp = 0, *colonp = 0;
-       const char *xdigits = 0, *curtok = 0;
-       int ch = 0, saw_xdigit = 0, count_xdigit = 0;
-       unsigned int val = 0;
-       unsigned dbloct_count = 0;
-
-       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 = count_xdigit = 0;
-       val = 0;
-
-       while ((ch = *src++) != '\0') {
-               const char *pch;
-
-               pch = strchr((xdigits = xdigits_l), ch);
-               if (pch == NULL)
-                       pch = strchr((xdigits = xdigits_u), ch);
-               if (pch != NULL) {
-                       if (count_xdigit >= 4)
-                               return 0;
-                       val <<= 4;
-                       val |= (pch - xdigits);
-                       if (val > 0xffff)
-                               return 0;
-                       saw_xdigit = 1;
-                       count_xdigit++;
-                       continue;
-               }
-               if (ch == ':') {
-                       curtok = src;
-                       if (!saw_xdigit) {
-                               if (colonp)
-                                       return 0;
-                               colonp = tp;
-                               continue;
-                       } else if (*src == '\0') {
-                               return 0;
-                       }
-                       if (tp + sizeof(int16_t) > endp)
-                               return 0;
-                       *tp++ = (unsigned char) ((val >> 8) & 0xff);
-                       *tp++ = (unsigned char) (val & 0xff);
-                       saw_xdigit = 0;
-                       count_xdigit = 0;
-                       val = 0;
-                       dbloct_count++;
-                       continue;
-               }
-               if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
-                   inet_pton4(curtok, tp) > 0) {
-                       tp += INADDRSZ;
-                       saw_xdigit = 0;
-                       dbloct_count += 2;
-                       break;  /* '\0' was seen by inet_pton4(). */
-               }
-               return 0;
-       }
-       if (saw_xdigit) {
-               if (tp + sizeof(int16_t) > endp)
-                       return 0;
-               *tp++ = (unsigned char) ((val >> 8) & 0xff);
-               *tp++ = (unsigned char) (val & 0xff);
-               dbloct_count++;
-       }
-       if (colonp != NULL) {
-               /* if we already have 8 double octets, having a colon
-                * means error */
-               if (dbloct_count == 8)
-                       return 0;
-
-               /*
-                * Since some memmove()'s erroneously fail to handle
-                * overlapping regions, we'll do the shift by hand.
-                */
-               const int n = tp - colonp;
-               int i;
-
-               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;
-}
-
 int
 parse_ipv4_addr(const char *token, struct in_addr *ipv4, uint32_t *mask)
 {
@@ -230,7 +67,7 @@ parse_ipv4_addr(const char *token, struct in_addr *ipv4, uint32_t *mask)
        if (strlen(ip_str) >= INET_ADDRSTRLEN)
                return -EINVAL;
 
-       if (inet_pton4(ip_str, (unsigned char *)ipv4) != 1)
+       if (inet_pton(AF_INET, ip_str, ipv4) != 1)
                return -EINVAL;
 
        return 0;
@@ -261,7 +98,7 @@ parse_ipv6_addr(const char *token, struct in6_addr *ipv6, uint32_t *mask)
        if (strlen(ip_str) >= INET6_ADDRSTRLEN)
                return -EINVAL;
 
-       if (inet_pton6(ip_str, (unsigned char *)ipv6) != 1)
+       if (inet_pton(AF_INET6, ip_str, ipv6) != 1)
                return -EINVAL;
 
        return 0;