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/*
* fake library for ssh
*
* This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
* These funtions are defined in rfc2133.
*
* But these functions are not implemented correctly. The minimum subset
* is implemented for ssh use only. For exapmle, this routine assumes
* that ai_family is AF_INET. Don't use it for another purpose.
*
* In the case not using 'configure --enable-ipv6', this getaddrinfo.c
* will be used if you have broken getaddrinfo or no getaddrinfo.
*/
#include "includes.h"
#include "ssh.h"
#ifndef HAVE_GAI_STRERROR
char *
gai_strerror(ecode)
int ecode;
{
switch (ecode) {
case EAI_NODATA:
return "no address associated with hostname.";
case EAI_MEMORY:
return "memory allocation failure.";
default:
return "unknown error.";
}
}
#endif /* !HAVE_GAI_STRERROR */
#ifndef HAVE_FREEADDRINFO
void
freeaddrinfo(ai)
struct addrinfo *ai;
{
struct addrinfo *next;
do {
next = ai->ai_next;
free(ai);
} while (ai = next);
}
#endif /* !HAVE_FREEADDRINFO */
#ifndef HAVE_GETADDRINFO
static struct addrinfo *
malloc_ai(port, addr)
int port;
u_long addr;
{
struct addrinfo *ai;
if (ai = (struct addrinfo *)malloc(sizeof(struct addrinfo) +
sizeof(struct sockaddr_in))) {
memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
ai->ai_addr = (struct sockaddr *)(ai + 1);
/* XXX -- ssh doesn't use sa_len */
ai->ai_addrlen = sizeof(struct sockaddr_in);
ai->ai_addr->sa_family = ai->ai_family = AF_INET;
((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
return ai;
} else {
return NULL;
}
}
int
getaddrinfo(hostname, servname, hints, res)
const char *hostname, *servname;
const struct addrinfo *hints;
struct addrinfo **res;
{
struct addrinfo *cur, *prev = NULL;
struct hostent *hp;
int i, port;
if (servname)
port = htons(atoi(servname));
else
port = 0;
if (hints && hints->ai_flags & AI_PASSIVE)
if (*res = malloc_ai(port, htonl(0x00000000)))
return 0;
else
return EAI_MEMORY;
if (!hostname)
if (*res = malloc_ai(port, htonl(0x7f000001)))
return 0;
else
return EAI_MEMORY;
if (inet_addr(hostname) != -1)
if (*res = malloc_ai(port, inet_addr(hostname)))
return 0;
else
return EAI_MEMORY;
if ((hp = gethostbyname(hostname)) &&
hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
for (i = 0; hp->h_addr_list[i]; i++)
if (cur = malloc_ai(port,
((struct in_addr *)hp->h_addr_list[i])->s_addr)) {
if (prev)
prev->ai_next = cur;
else
*res = cur;
prev = cur;
} else {
if (*res)
freeaddrinfo(*res);
return EAI_MEMORY;
}
return 0;
}
return EAI_NODATA;
}
#endif /* !HAVE_GETADDRINFO */
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