[dpdk-dev] [PATCH v3 2/3] examples/ip_pipeline: Remove the re-implementation of inet_pton

[Ibtisam Tariq <ibtisam.tariq@emumba.com>]

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

Bugzilla ID: 365
Fixes: ed7a0490f7e2 ("examples/ip_pipeline: add string parsing helpers")
Cc: piotrx.t.azarewicz@intel.com

Reported-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ibtisam Tariq <ibtisam.tariq@emumba.com>
---
v3:
* None

v2:
* Added fixed id in commit body
---
 examples/ip_pipeline/parser.c | 189 +---------------------------------
 1 file changed, 3 insertions(+), 186 deletions(-)

diff --git a/examples/ip_pipeline/parser.c b/examples/ip_pipeline/parser.c
index fb0769fe3..6ddf0bec4 100644
--- a/examples/ip_pipeline/parser.c
+++ b/examples/ip_pipeline/parser.c
@@ -4,25 +4,6 @@
  * All rights reserved.
  */
 
-/*
- * For inet_pton4() and inet_pton6() functions:
- *
- * 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 <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -34,6 +15,7 @@
 #include <libgen.h>
 #include <unistd.h>
 #include <sys/wait.h>
+#include <arpa/inet.h>
 
 #include <rte_errno.h>
 #include <rte_string_fns.h>
@@ -348,171 +330,6 @@ parse_mpls_labels(char *string, uint32_t *labels, uint32_t *n_labels)
 	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;
-}
-
 static struct rte_ether_addr *
 my_ether_aton(const char *a)
 {
@@ -562,7 +379,7 @@ parse_ipv4_addr(const char *token, struct in_addr *ipv4)
 	if (strlen(token) >= INET_ADDRSTRLEN)
 		return -EINVAL;
 
-	if (inet_pton4(token, (unsigned char *)ipv4) != 1)
+	if (inet_pton(AF_INET, token, ipv4) != 1)
 		return -EINVAL;
 
 	return 0;
@@ -574,7 +391,7 @@ parse_ipv6_addr(const char *token, struct in6_addr *ipv6)
 	if (strlen(token) >= INET6_ADDRSTRLEN)
 		return -EINVAL;
 
-	if (inet_pton6(token, (unsigned char *)ipv6) != 1)
+	if (inet_pton(AF_INET6, token, ipv6) != 1)
 		return -EINVAL;
 
 	return 0;
-- 
2.17.1