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inany: Add inany_ntop() helper

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Add this helper to format an inany into either IPv4 or IPv6 text
format as appropriate.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-02-28 22:25:02 +11:00 committed by Stefano Brivio
parent d31277e292
commit 330b5db77d
3 changed files with 41 additions and 2 deletions
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4
Makefile
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@ -45,8 +45,8 @@ FLAGS += -DVERSION=\"$(VERSION)\"
FLAGS += -DDUAL_STACK_SOCKETS=$(DUAL_STACK_SOCKETS)
PASST_SRCS = arch.c arp.c checksum.c conf.c dhcp.c dhcpv6.c flow.c icmp.c \
igmp.c iov.c isolation.c lineread.c log.c mld.c ndp.c netlink.c \
packet.c passt.c pasta.c pcap.c pif.c port_fwd.c tap.c tcp.c \
igmp.c inany.c iov.c isolation.c lineread.c log.c mld.c ndp.c \
netlink.c packet.c passt.c pasta.c pcap.c pif.c port_fwd.c tap.c tcp.c \
tcp_splice.c udp.c util.c
QRAP_SRCS = qrap.c
SRCS = $(PASST_SRCS) $(QRAP_SRCS)

35
inany.c Normal file
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@ -0,0 +1,35 @@
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright Red Hat
* Author: David Gibson <david@gibson.dropbear.id.au>
*
* inany.c - Types and helpers for handling addresses which could be
* IPv6 or IPv4 (encoded as IPv4-mapped IPv6 addresses)
*/
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "util.h"
#include "siphash.h"
#include "inany.h"
/** inany_ntop - Convert an IPv[46] address to text format
* @src: IPv[46] address
* @dst: output buffer, minimum INANY_ADDRSTRLEN bytes
* @size: size of buffer at @dst
*
* Return: On success, a non-null pointer to @dst, NULL on failure
*/
/* cppcheck-suppress unusedFunction */
const char *inany_ntop(const union inany_addr *src, char *dst, socklen_t size)
{
const struct in_addr *v4 = inany_v4(src);
if (v4)
return inet_ntop(AF_INET, v4, dst, size);
return inet_ntop(AF_INET6, &src->a6, dst, size);
}

4
inany.h
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@ -162,4 +162,8 @@ static inline void inany_siphash_feed(struct siphash_state *state,
siphash_feed(state, (uint64_t)aa->u32[2] << 32 | aa->u32[3]);
}
#define INANY_ADDRSTRLEN MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)
const char *inany_ntop(const union inany_addr *src, char *dst, socklen_t size);
#endif /* INANY_H */