5b07039b07
The former name is more or less only used by tinc, the latter is used by other projects as well, and shorter as well.
102 lines
2.3 KiB
C
102 lines
2.3 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 "system.h"
|
|
|
|
#include "ipv4.h"
|
|
#include "ipv6.h"
|
|
#include "fake-getaddrinfo.h"
|
|
#include "xalloc.h"
|
|
|
|
|
|
#if !HAVE_DECL_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";
|
|
case EAI_FAMILY:
|
|
return "Address family not supported";
|
|
default:
|
|
return "Unknown error";
|
|
}
|
|
}
|
|
#endif /* !HAVE_GAI_STRERROR */
|
|
|
|
#if !HAVE_DECL_FREEADDRINFO
|
|
void freeaddrinfo(struct addrinfo *ai) {
|
|
struct addrinfo *next;
|
|
|
|
while(ai) {
|
|
next = ai->ai_next;
|
|
free(ai);
|
|
ai = next;
|
|
}
|
|
}
|
|
#endif /* !HAVE_FREEADDRINFO */
|
|
|
|
#if !HAVE_DECL_GETADDRINFO
|
|
static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr) {
|
|
struct addrinfo *ai;
|
|
|
|
ai = xzalloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
|
|
|
|
ai->ai_addr = (struct sockaddr *)(ai + 1);
|
|
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 *prev = NULL;
|
|
struct hostent *hp;
|
|
struct in_addr in = {0};
|
|
int i;
|
|
uint16_t port = 0;
|
|
|
|
if(hints && hints->ai_family != AF_INET && hints->ai_family != AF_UNSPEC)
|
|
return EAI_FAMILY;
|
|
|
|
if (servname)
|
|
port = htons(atoi(servname));
|
|
|
|
if (hints && hints->ai_flags & AI_PASSIVE) {
|
|
*res = malloc_ai(port, htonl(0x00000000));
|
|
return 0;
|
|
}
|
|
|
|
if (!hostname) {
|
|
*res = malloc_ai(port, htonl(0x7f000001));
|
|
return 0;
|
|
}
|
|
|
|
hp = gethostbyname(hostname);
|
|
|
|
if(!hp || !hp->h_addr_list || !hp->h_addr_list[0])
|
|
return EAI_NODATA;
|
|
|
|
for (i = 0; hp->h_addr_list[i]; i++) {
|
|
*res = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
|
|
|
|
if(prev)
|
|
prev->ai_next = *res;
|
|
|
|
prev = *res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* !HAVE_GETADDRINFO */
|