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Commit | Line | Data |
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48e671d5 | 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. | |
48e671d5 | 10 | */ |
11 | ||
12 | #include "includes.h" | |
13 | #include "ssh.h" | |
14 | ||
15 | #ifndef HAVE_GAI_STRERROR | |
5daf7064 | 16 | char *gai_strerror(int ecode) |
48e671d5 | 17 | { |
5daf7064 | 18 | switch (ecode) { |
19 | case EAI_NODATA: | |
20 | return "no address associated with hostname."; | |
21 | case EAI_MEMORY: | |
22 | return "memory allocation failure."; | |
23 | default: | |
24 | return "unknown error."; | |
25 | } | |
48e671d5 | 26 | } |
27 | #endif /* !HAVE_GAI_STRERROR */ | |
28 | ||
29 | #ifndef HAVE_FREEADDRINFO | |
5daf7064 | 30 | void freeaddrinfo(struct addrinfo *ai) |
48e671d5 | 31 | { |
5daf7064 | 32 | struct addrinfo *next; |
33 | ||
34 | do { | |
35 | next = ai->ai_next; | |
36 | free(ai); | |
37 | } while (NULL != (ai = next)); | |
48e671d5 | 38 | } |
39 | #endif /* !HAVE_FREEADDRINFO */ | |
40 | ||
41 | #ifndef HAVE_GETADDRINFO | |
5daf7064 | 42 | static struct addrinfo *malloc_ai(int port, u_long addr) |
48e671d5 | 43 | { |
5daf7064 | 44 | struct addrinfo *ai; |
45 | ||
46 | ai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_in)); | |
47 | if (ai == NULL) | |
48 | return(NULL); | |
49 | ||
50 | memset(ai, 0, sizeof(struct addrinfo) + sizeof(struct sockaddr_in)); | |
51 | ||
52 | ai->ai_addr = (struct sockaddr *)(ai + 1); | |
53 | /* XXX -- ssh doesn't use sa_len */ | |
54 | ai->ai_addrlen = sizeof(struct sockaddr_in); | |
55 | ai->ai_addr->sa_family = ai->ai_family = AF_INET; | |
48e671d5 | 56 | |
5daf7064 | 57 | ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port; |
58 | ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr; | |
59 | ||
60 | return(ai); | |
48e671d5 | 61 | } |
62 | ||
5daf7064 | 63 | int getaddrinfo(const char *hostname, const char *servname, |
64 | const struct addrinfo *hints, struct addrinfo **res) | |
48e671d5 | 65 | { |
5daf7064 | 66 | struct addrinfo *cur, *prev = NULL; |
67 | struct hostent *hp; | |
9c13d877 | 68 | struct in_addr in; |
5daf7064 | 69 | int i, port; |
70 | ||
71 | if (servname) | |
72 | port = htons(atoi(servname)); | |
48e671d5 | 73 | else |
5daf7064 | 74 | port = 0; |
75 | ||
76 | if (hints && hints->ai_flags & AI_PASSIVE) { | |
77 | if (NULL != (*res = malloc_ai(port, htonl(0x00000000)))) | |
78 | return 0; | |
79 | else | |
80 | return EAI_MEMORY; | |
81 | } | |
82 | ||
83 | if (!hostname) { | |
84 | if (NULL != (*res = malloc_ai(port, htonl(0x7f000001)))) | |
85 | return 0; | |
86 | else | |
87 | return EAI_MEMORY; | |
88 | } | |
89 | ||
dc2a6d09 | 90 | if (inet_aton(hostname, &in)) { |
9c13d877 | 91 | if (NULL != (*res = malloc_ai(port, in.s_addr))) |
5daf7064 | 92 | return 0; |
93 | else | |
94 | return EAI_MEMORY; | |
95 | } | |
96 | ||
97 | hp = gethostbyname(hostname); | |
98 | if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) { | |
99 | for (i = 0; hp->h_addr_list[i]; i++) { | |
100 | cur = malloc_ai(port, ((struct in_addr *)hp->h_addr_list[i])->s_addr); | |
101 | if (cur == NULL) { | |
102 | if (*res) | |
103 | freeaddrinfo(*res); | |
104 | return EAI_MEMORY; | |
105 | } | |
106 | ||
107 | if (prev) | |
108 | prev->ai_next = cur; | |
109 | else | |
110 | *res = cur; | |
111 | ||
112 | prev = cur; | |
113 | } | |
114 | return 0; | |
115 | } | |
116 | ||
117 | return EAI_NODATA; | |
48e671d5 | 118 | } |
119 | #endif /* !HAVE_GETADDRINFO */ |