122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "ssh.h"
|
|
|
|
RCSID("$Id: fake-getaddrinfo.c,v 1.2 2001/02/09 01:55:36 djm Exp $");
|
|
|
|
#ifndef HAVE_GAI_STRERROR
|
|
char *gai_strerror(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(struct addrinfo *ai)
|
|
{
|
|
struct addrinfo *next;
|
|
|
|
do {
|
|
next = ai->ai_next;
|
|
free(ai);
|
|
} while (NULL != (ai = next));
|
|
}
|
|
#endif /* !HAVE_FREEADDRINFO */
|
|
|
|
#ifndef HAVE_GETADDRINFO
|
|
static struct addrinfo *malloc_ai(int port, u_long addr)
|
|
{
|
|
struct addrinfo *ai;
|
|
|
|
ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
|
|
if (ai == NULL)
|
|
return(NULL);
|
|
|
|
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);
|
|
}
|
|
|
|
int getaddrinfo(const char *hostname, const char *servname,
|
|
const struct addrinfo *hints, struct addrinfo **res)
|
|
{
|
|
struct addrinfo *cur, *prev = NULL;
|
|
struct hostent *hp;
|
|
struct in_addr in;
|
|
int i, port;
|
|
|
|
if (servname)
|
|
port = htons(atoi(servname));
|
|
else
|
|
port = 0;
|
|
|
|
if (hints && hints->ai_flags & AI_PASSIVE) {
|
|
if (NULL != (*res = malloc_ai(port, htonl(0x00000000))))
|
|
return 0;
|
|
else
|
|
return EAI_MEMORY;
|
|
}
|
|
|
|
if (!hostname) {
|
|
if (NULL != (*res = malloc_ai(port, htonl(0x7f000001))))
|
|
return 0;
|
|
else
|
|
return EAI_MEMORY;
|
|
}
|
|
|
|
if (inet_aton(hostname, &in)) {
|
|
if (NULL != (*res = malloc_ai(port, in.s_addr)))
|
|
return 0;
|
|
else
|
|
return EAI_MEMORY;
|
|
}
|
|
|
|
hp = gethostbyname(hostname);
|
|
if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
|
|
for (i = 0; hp->h_addr_list[i]; i++) {
|
|
cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
|
|
if (cur == NULL) {
|
|
if (*res)
|
|
freeaddrinfo(*res);
|
|
return EAI_MEMORY;
|
|
}
|
|
|
|
if (prev)
|
|
prev->ai_next = cur;
|
|
else
|
|
*res = cur;
|
|
|
|
prev = cur;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return EAI_NODATA;
|
|
}
|
|
#endif /* !HAVE_GETADDRINFO */
|