mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-26 20:02:13 +00:00
120 lines
2.8 KiB
C
120 lines
2.8 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.
|
|
*
|
|
* 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 (NULL != (ai = next));
|
|
}
|
|
#endif /* !HAVE_FREEADDRINFO */
|
|
|
|
#ifndef HAVE_GETADDRINFO
|
|
static struct addrinfo *
|
|
malloc_ai(port, addr)
|
|
int port;
|
|
u_long addr;
|
|
{
|
|
struct addrinfo *ai;
|
|
|
|
if (NULL != (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 (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_addr(hostname) != -1)
|
|
if (NULL != (*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 (NULL != (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 */
|