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/* $OpenBSD: util.c,v 1.3 2019/07/03 03:24:03 deraadt Exp $ */
/*
* Copyright (c) 2013 Internet Initiative Japan Inc.
*
* 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <stdio.h>
#include "util.h"
/*
* Convert argument like "192.168.160.1:1723/tcp" or "[::1]:1723/tcp" to
* match getaddrinfo(3)'s specification and pass them to getaddrinfo(3).
*/
int
addrport_parse(const char *addrport, int proto, struct addrinfo **p_ai)
{
char *servp, *nodep, *slash, buf[256];
struct addrinfo hints;
strlcpy(buf, addrport, sizeof(buf));
if (buf[0] == '[' && (servp = strchr(buf, ']')) != NULL) {
nodep = buf + 1;
*servp++ = '\0';
if (*servp != ':')
servp = NULL;
} else {
nodep = buf;
servp = strrchr(nodep, ':');
}
if (servp != NULL) {
*servp = '\0';
servp++;
slash = strrchr(servp, '/');
if (slash != NULL) {
/*
* Ignore like "/tcp"
*/
*slash = '\0';
slash++;
}
} else
servp = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_NUMERICHOST;
hints.ai_family = AF_UNSPEC;
switch (proto) {
case IPPROTO_TCP:
hints.ai_socktype = SOCK_STREAM;
break;
case IPPROTO_UDP:
hints.ai_socktype = SOCK_DGRAM;
break;
}
hints.ai_protocol = proto;
return (getaddrinfo(nodep, servp, &hints, p_ai));
}
/*
* Make a string like "192.168.160.1:1723" or "[::1]:1723" from a struct
* sockaddr
*/
const char *
addrport_tostring(struct sockaddr *sa, socklen_t salen, char *buf, size_t lbuf)
{
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
int ret;
if (getnameinfo(sa, salen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf),
NI_NUMERICHOST | NI_NUMERICSERV) != 0)
return (NULL);
switch (sa->sa_family) {
case AF_INET6:
ret = snprintf(buf, lbuf, "[%s]:%s", hbuf, sbuf);
break;
case AF_INET:
ret = snprintf(buf, lbuf, "%s:%s", hbuf, sbuf);
break;
default:
return "error";
}
if (ret < 0 || ret >= (int)lbuf)
return "(error)";
return (buf);
}
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