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"
16 #ifndef HAVE_GAI_STRERROR
17 char *gai_strerror(int ecode)
21 return "no address associated with hostname.";
23 return "memory allocation failure.";
25 return "unknown error.";
28 #endif /* !HAVE_GAI_STRERROR */
30 #ifndef HAVE_FREEADDRINFO
31 void freeaddrinfo(struct addrinfo *ai)
33 struct addrinfo *next;
38 } while (NULL != (ai = next));
40 #endif /* !HAVE_FREEADDRINFO */
42 #ifndef HAVE_GETADDRINFO
43 static struct addrinfo *malloc_ai(int port, u_long addr)
47 ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
51 memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
53 ai->ai_addr = (struct sockaddr *)(ai + 1);
54 /* XXX -- ssh doesn't use sa_len */
55 ai->ai_addrlen = sizeof(struct sockaddr_in);
56 ai->ai_addr->sa_family = ai->ai_family = AF_INET;
58 ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
59 ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
64 int getaddrinfo(const char *hostname, const char *servname,
65 const struct addrinfo *hints, struct addrinfo **res)
67 struct addrinfo *cur, *prev = NULL;
73 port = htons(atoi(servname));
77 if (hints && hints->ai_flags & AI_PASSIVE) {
78 if (NULL != (*res = malloc_ai(port, htonl(0x00000000))))
85 if (NULL != (*res = malloc_ai(port, htonl(0x7f000001))))
92 if (inet_aton(hostname, &in)) {
93 if (NULL != (*res = malloc_ai(port, in.s_addr)))
100 hp = gethostbyname(hostname);
101 if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
102 for (i = 0; hp->h_addr_list[i]; i++) {
103 cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
122 #endif /* !HAVE_GETADDRINFO */