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Diffstat (limited to 'openbsd-compat/fake-getaddrinfo.c')
-rw-r--r--openbsd-compat/fake-getaddrinfo.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/openbsd-compat/fake-getaddrinfo.c b/openbsd-compat/fake-getaddrinfo.c
new file mode 100644
index 000000000..e63bda970
--- /dev/null
+++ b/openbsd-compat/fake-getaddrinfo.c
@@ -0,0 +1,135 @@
1/*
2 * fake library for ssh
3 *
4 * This file includes getaddrinfo(), freeaddrinfo() and gai_strerror().
5 * These funtions are defined in rfc2133.
6 *
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.
10 */
11
12#include "includes.h"
13#include "ssh.h"
14
15RCSID("$Id: fake-getaddrinfo.c,v 1.5 2003/03/24 02:35:59 djm Exp $");
16
17#ifndef HAVE_GAI_STRERROR
18char *gai_strerror(int ecode)
19{
20 switch (ecode) {
21 case EAI_NODATA:
22 return "no address associated with hostname.";
23 case EAI_MEMORY:
24 return "memory allocation failure.";
25 default:
26 return "unknown error.";
27 }
28}
29#endif /* !HAVE_GAI_STRERROR */
30
31#ifndef HAVE_FREEADDRINFO
32void freeaddrinfo(struct addrinfo *ai)
33{
34 struct addrinfo *next;
35
36 do {
37 next = ai->ai_next;
38 free(ai);
39 } while (NULL != (ai = next));
40}
41#endif /* !HAVE_FREEADDRINFO */
42
43#ifndef HAVE_GETADDRINFO
44static struct addrinfo *malloc_ai(int port, u_long addr)
45{
46 struct addrinfo *ai;
47
48 ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
49 if (ai == NULL)
50 return(NULL);
51
52 memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
53
54 ai->ai_addr = (struct sockaddr *)(ai + 1);
55 /* XXX -- ssh doesn't use sa_len */
56 ai->ai_addrlen = sizeof(struct sockaddr_in);
57 ai->ai_addr->sa_family = ai->ai_family = AF_INET;
58
59 ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
60 ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
61
62 return(ai);
63}
64
65int getaddrinfo(const char *hostname, const char *servname,
66 const struct addrinfo *hints, struct addrinfo **res)
67{
68 struct addrinfo *cur, *prev = NULL;
69 struct hostent *hp;
70 struct servent *sp;
71 struct in_addr in;
72 int i;
73 long int port;
74 u_long addr;
75
76 port = 0;
77 if (servname != NULL) {
78 char *cp;
79
80 port = strtol(servname, &cp, 10);
81 if (port > 0 && port <= 65535 && *cp == '\0')
82 port = htons(port);
83 else if ((sp = getservbyname(servname, NULL)) != NULL)
84 port = sp->s_port;
85 else
86 port = 0;
87 }
88
89 if (hints && hints->ai_flags & AI_PASSIVE) {
90 addr = htonl(0x00000000);
91 if (hostname && inet_aton(hostname, &in) != 0)
92 addr = in.s_addr;
93 if (NULL != (*res = malloc_ai(port, addr)))
94 return 0;
95 else
96 return EAI_MEMORY;
97 }
98
99 if (!hostname) {
100 if (NULL != (*res = malloc_ai(port, htonl(0x7f000001))))
101 return 0;
102 else
103 return EAI_MEMORY;
104 }
105
106 if (inet_aton(hostname, &in)) {
107 if (NULL != (*res = malloc_ai(port, in.s_addr)))
108 return 0;
109 else
110 return EAI_MEMORY;
111 }
112
113 hp = gethostbyname(hostname);
114 if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
115 for (i = 0; hp->h_addr_list[i]; i++) {
116 cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr);
117 if (cur == NULL) {
118 if (*res)
119 freeaddrinfo(*res);
120 return EAI_MEMORY;
121 }
122
123 if (prev)
124 prev->ai_next = cur;
125 else
126 *res = cur;
127
128 prev = cur;
129 }
130 return 0;
131 }
132
133 return EAI_NODATA;
134}
135#endif /* !HAVE_GETADDRINFO */