4 * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
5 * These funtions are defined in rfc2133.
7 * But these functions are not implemented correctly. The minimum subset
8 * is implemented for ssh use only. For exapmle, this routine assumes
9 * that ai_family is AF_INET. Don't use it for another purpose.
14 #include "fake-getaddrinfo.h"
18 #if !HAVE_DECL_GAI_STRERROR
19 char *gai_strerror(int ecode) {
22 return "No address associated with hostname";
24 return "Memory allocation failure";
26 return "Address family not supported";
28 return "Unknown error";
31 #endif /* !HAVE_GAI_STRERROR */
33 #if !HAVE_DECL_FREEADDRINFO
34 void freeaddrinfo(struct addrinfo *ai) {
35 struct addrinfo *next;
43 #endif /* !HAVE_FREEADDRINFO */
45 #if !HAVE_DECL_GETADDRINFO
46 static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr) {
49 ai = xzalloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
51 ai->ai_addr = (struct sockaddr *)(ai + 1);
52 ai->ai_addrlen = sizeof(struct sockaddr_in);
53 ai->ai_addr->sa_family = ai->ai_family = AF_INET;
55 ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
56 ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
61 int getaddrinfo(const char *hostname, const char *servname, const struct addrinfo *hints, struct addrinfo **res) {
62 struct addrinfo *prev = NULL;
64 struct in_addr in = {0};
68 if(hints && hints->ai_family != AF_INET && hints->ai_family != AF_UNSPEC)
72 port = htons(atoi(servname));
74 if(hints && hints->ai_flags & AI_PASSIVE) {
75 *res = malloc_ai(port, htonl(0x00000000));
80 *res = malloc_ai(port, htonl(0x7f000001));
84 hp = gethostbyname(hostname);
86 if(!hp || !hp->h_addr_list || !hp->h_addr_list[0])
89 for(i = 0; hp->h_addr_list[i]; i++) {
90 *res = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
100 #endif /* !HAVE_GETADDRINFO */