1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: rfc2553emu.cc,v 1.1 1999/05/25 05:56:24 jgg Exp $
/* ######################################################################
RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo,
freeaddrinfo and getnameinfo
Originally written by Jason Gunthorpe <jgg@debian.org> and placed into
the Public Domain, do with it what you will.
##################################################################### */
/*}}}*/
#include "rfc2553emu.h"
#include <stdlib.h>
#include <arpa/inet.h>
#include <iostream.h>
#ifndef HAVE_GETADDRINFO
int getaddrinfo(const char *nodename, const char *servname,
const struct addrinfo *hints,
struct addrinfo **res)
{
struct addrinfo **Result;
hostent *Addr;
unsigned int Port;
int Proto;
const char *End;
char **CurAddr;
Addr = gethostbyname(nodename);
if (Addr == 0)
{
if (h_errno == TRY_AGAIN)
return EAI_AGAIN;
if (h_errno == NO_RECOVERY)
return EAI_FAIL;
return EAI_NONAME;
}
// No A records
if (Addr->h_addr_list[0] == 0)
return EAI_NONAME;
// Try to convert the service as a number
Port = htons(strtol(servname,(char **)&End,0));
Proto = SOCK_STREAM;
if (hints != 0 && hints->ai_socktype != 0)
Proto = hints->ai_socktype;
// Not a number, must be a name.
if (End != servname + strlen(End))
{
struct servent *Srv = 0;
// Do a lookup in the service database
if (hints == 0 || hints->ai_socktype == SOCK_STREAM)
Srv = getservbyname(servname,"tcp");
if (hints != 0 && hints->ai_socktype == SOCK_DGRAM)
Srv = getservbyname(servname,"udp");
if (Srv == 0)
return EAI_NONAME;
// Get the right protocol
Port = Srv->s_port;
if (strcmp(Srv->s_proto,"tcp") == 0)
Proto = SOCK_STREAM;
else
{
if (strcmp(Srv->s_proto,"udp") == 0)
Proto = SOCK_DGRAM;
else
return EAI_NONAME;
}
if (hints != 0 && hints->ai_socktype != Proto &&
hints->ai_socktype != 0)
return EAI_SERVICE;
}
// Start constructing the linked list
*res = 0;
for (CurAddr = Addr->h_addr_list; *CurAddr != 0; CurAddr++)
{
// New result structure
*Result = (struct addrinfo *)calloc(sizeof(**Result),1);
if (*Result == 0)
{
freeaddrinfo(*res);
return EAI_MEMORY;
}
if (*res == 0)
*res = *Result;
(*Result)->ai_family = AF_INET;
(*Result)->ai_socktype = Proto;
// If we have the IPPROTO defines we can set the protocol field
#ifdef IPPROTO_TCP
if (Proto == SOCK_STREAM)
(*Result)->ai_protocol = IPPROTO_TCP;
if (Proto == SOCK_DGRAM)
(*Result)->ai_protocol = IPPROTO_UDP;
#endif
// Allocate space for the address
(*Result)->ai_addrlen = sizeof(struct sockaddr_in);
(*Result)->ai_addr = (struct sockaddr *)calloc(sizeof(sockaddr_in),1);
if ((*Result)->ai_addr == 0)
{
freeaddrinfo(*res);
return EAI_MEMORY;
}
// Set the address
((struct sockaddr_in *)(*Result)->ai_addr)->sin_family = AF_INET;
((struct sockaddr_in *)(*Result)->ai_addr)->sin_port = Port;
((struct sockaddr_in *)(*Result)->ai_addr)->sin_addr = *(in_addr *)(*CurAddr);
Result = &(*Result)->ai_next;
}
return 0;
}
void freeaddrinfo(struct addrinfo *ai)
{
struct addrinfo *Tmp;
while (ai != 0)
{
free(ai->ai_addr);
Tmp = ai;
ai = ai->ai_next;
free(ai);
}
}
#endif // HAVE_GETADDRINFO
|
