Re: [dpdk-dev] [PATCH v2 3/3] examples/ipsec-secgw: Remove the re-implementation of inet_pton

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

> 
> 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")
> Cc: roy.fan.zhang@intel.com
> 
> Reported-by: David Marchand <david.marchand@redhat.com>
> Signed-off-by: Ibtisam Tariq <ibtisam.tariq@emumba.com>

LGTM
One thing to address - freebsd build is failing:
http://mails.dpdk.org/archives/test-report/2020-June/134949.html
Presumably extra include (<sys/socket.h> ?) is missing.

> ---
> v2:
> * Fixed the name of variable, passed as input to inet_pton function.
> * Add fixed id in commit body
> ---
>  examples/ipsec-secgw/parser.c | 171 +---------------------------------
>  1 file changed, 3 insertions(+), 168 deletions(-)
> 
> diff --git a/examples/ipsec-secgw/parser.c b/examples/ipsec-secgw/parser.c
> index 65eb7e9e2..58ef3de0a 100644
> --- a/examples/ipsec-secgw/parser.c
> +++ b/examples/ipsec-secgw/parser.c
> @@ -10,6 +10,7 @@
>  #include <cmdline_parse_ipaddr.h>
>  #include <cmdline_socket.h>
>  #include <cmdline.h>
> +#include <arpa/inet.h>
> 
>  #include "ipsec.h"
>  #include "parser.h"
> @@ -39,172 +40,6 @@ 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)
>  {
> @@ -229,7 +64,7 @@ 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;
> @@ -260,7 +95,7 @@ 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;
> --
> 2.17.1