author | Tero Marttila <terom@fixme.fi> |
Thu, 28 Aug 2008 03:14:07 +0300 | |
changeset 47 | a5c09677ca6f |
parent 39 | 0e21a65074a6 |
child 48 | 1c67f512779b |
permissions | -rw-r--r-- |
26
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#include <arpa/inet.h> |
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#include <sys/socket.h> |
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#include <sys/types.h> |
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#include <fcntl.h> |
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#include <netdb.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <errno.h> |
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#include <assert.h> |
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|
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|
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#include "socket.h" |
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#include "common.h" |
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|
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#define _SOCKOP_SOCKET 0x01 |
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#define _SOCKOP_ENDPOINT_BIND 0x02 |
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#define _SOCKOP_ENDPOINT_CONNECT 0x04 |
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#define _SOCKOP_LISTEN 0x08 |
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#define _SOCKOP_FLAGS_PASSIVE 0x10 |
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#define _SOCKOP_FCNTL_NONBLOCK 0x20 |
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|
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enum socket_op { |
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/* |
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* Just resolve the address, don't create a socket |
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*/ |
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SOCKOP_RESOLVE = _SOCKOP_FLAGS_PASSIVE, |
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|
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/* |
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* Create a socket whose local end is bound to the given endpoint, and listening |
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*/ |
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SOCKOP_LISTEN = _SOCKOP_FLAGS_PASSIVE | _SOCKOP_SOCKET | _SOCKOP_ENDPOINT_BIND | _SOCKOP_LISTEN, |
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|
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/* |
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* Create a socket whose remote end is connected to the given endpoint, and connected |
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*/ |
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SOCKOP_CONNECT = _SOCKOP_SOCKET | _SOCKOP_ENDPOINT_CONNECT, |
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|
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/* |
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* Create a socket and initiate a nonblocking connect to the given endpoint |
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40 |
*/ |
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SOCKOP_CONNECT_ASYNC = _SOCKOP_SOCKET | _SOCKOP_FCNTL_NONBLOCK | _SOCKOP_ENDPOINT_CONNECT, |
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}; |
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|
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static int _socket_do (struct config_endpoint *endpoint, int *sock, int sock_type, struct sockaddr_storage *addr, enum socket_op sockop); |
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|
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46 |
/* |
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47 |
* Create a socket of the given type that's listening on the given endpoint |
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48 |
*/ |
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int socket_listen (struct config_endpoint *endpoint, int sock_type) { |
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int sock = -1; |
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struct sockaddr_storage addr; |
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|
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// and then _socket_do |
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if (_socket_do(endpoint, &sock, sock_type, &addr, SOCKOP_LISTEN)) |
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return -1; |
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|
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// just return the socket, discard addr |
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return sock; |
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} |
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|
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/* |
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* Initiate an async connect to the given endpoint for the given socket type. This should work for |
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* PF_INET and PF_LOCAL sockets, and in both cases, socket writeability should indicate that the |
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* connect succeeded. |
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* |
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* XXX: Currently it looks up the endpoint each time - the working addrinfo should be cached |
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67 |
*/ |
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int socket_connect_async (struct config_endpoint *endpoint, int sock_type) { |
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int sock = -1; |
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struct sockaddr_storage addr; |
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|
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// and then _socket_do |
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if (_socket_do(endpoint, &sock, sock_type, &addr, SOCKOP_CONNECT_ASYNC)) |
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return -1; |
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|
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// return the socket |
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return sock; |
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} |
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|
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80 |
/* |
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81 |
* Check if the given socket has an error condition set, mostly intended for use with socket_connect_async. |
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82 |
* |
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* Returns 0 and sets *error on success (zero = no error, nonzero = error), -1 on failure (invalid socket). |
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84 |
*/ |
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85 |
int socket_check_error (int sock, int *error) { |
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socklen_t optlen = sizeof(*error); |
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|
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88 |
if (getsockopt(sock, SOL_SOCKET, SO_ERROR, error, &optlen)) |
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89 |
PERROR("getsockopt"); |
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90 |
|
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91 |
return 0; |
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92 |
|
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93 |
error: |
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94 |
return -1; |
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95 |
} |
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96 |
|
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97 |
|
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98 |
/* |
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99 |
* Do something to apply an endpoint to a socket |
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100 |
*/ |
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101 |
static int _socket_do (struct config_endpoint *endpoint, int *sock, int sock_type, struct sockaddr_storage *addr, enum socket_op sockop) { |
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102 |
struct addrinfo *res = NULL, *info, _fake_res; |
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103 |
struct sockaddr_un _fake_addr_un; |
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104 |
|
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105 |
if (endpoint->family == PF_UNIX) { |
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106 |
// getaddrinfo doesn't handle PF_UNIX, so we need to build a fake result |
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107 |
|
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108 |
// build the sockaddr_un |
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109 |
_fake_addr_un.sun_family = endpoint->family; |
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110 |
memcpy(_fake_addr_un.sun_path, endpoint->af.local.path, sizeof(_fake_addr_un.sun_path)); |
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111 |
|
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112 |
// build the fake addrinfo res |
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113 |
_fake_res.ai_flags = 0; |
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114 |
_fake_res.ai_family = PF_UNIX; |
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115 |
_fake_res.ai_socktype = sock_type; |
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116 |
_fake_res.ai_protocol = 0; |
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117 |
_fake_res.ai_addrlen = SUN_LEN(&_fake_addr_un); |
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118 |
_fake_res.ai_addr = (struct sockaddr *) &_fake_addr_un; |
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119 |
_fake_res.ai_canonname = (char *) endpoint->af.local.path; /* XXX: not const */ |
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120 |
_fake_res.ai_next = NULL; |
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121 |
|
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122 |
res = &_fake_res; |
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|
123 |
|
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124 |
} else if (endpoint->family == PF_INET) { |
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125 |
// use the real getaddrinfo |
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126 |
|
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127 |
struct addrinfo hints; |
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128 |
memset(&hints, 0, sizeof(hints)); |
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|
129 |
|
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130 |
hints.ai_socktype = sock_type; |
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131 |
hints.ai_protocol = 0; |
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132 |
hints.ai_flags = (sockop & _SOCKOP_FLAGS_PASSIVE ? AI_PASSIVE : 0) | AI_CANONNAME; |
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133 |
|
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134 |
int err; |
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135 |
|
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136 |
// check that we have a service, doesn't make any sense without |
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137 |
if (!endpoint->af.inet.port) |
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|
138 |
ERROR("no service specified"); |
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139 |
|
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140 |
if ((err = getaddrinfo(endpoint->af.inet.addr, endpoint->af.inet.port, &hints, &res)) != 0) |
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141 |
ERROR("getaddrinfo: %s#%s: %s", endpoint->af.inet.addr, endpoint->af.inet.port, gai_strerror(err)); |
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|
142 |
|
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143 |
} else { |
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144 |
ERROR("invalid endpoint"); |
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145 |
} |
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|
146 |
|
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147 |
for (info = res; info; info = info->ai_next) { |
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|
148 |
if (sockop & _SOCKOP_SOCKET && (*sock = socket(info->ai_family, info->ai_socktype, info->ai_protocol)) == -1) { |
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|
149 |
PWARNING("socket(%d, %s)", info->ai_family, info->ai_canonname); |
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150 |
continue; |
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151 |
} |
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|
152 |
|
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153 |
if (sockop & _SOCKOP_FCNTL_NONBLOCK && fcntl(*sock, F_SETFL, O_NONBLOCK) == -1) { |
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154 |
PWARNING("fcntl(%d, %s, F_SETFL O_NONBLOCK)", info->ai_family, info->ai_canonname); |
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|
155 |
close(*sock); *sock = -1; |
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|
156 |
continue; |
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157 |
} |
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|
158 |
|
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|
159 |
if (sockop & _SOCKOP_ENDPOINT_BIND && bind(*sock, info->ai_addr, info->ai_addrlen) == -1) { |
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|
160 |
PWARNING("bind(%d, %s)", info->ai_family, info->ai_canonname); |
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|
161 |
close(*sock); *sock = -1; |
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|
162 |
continue; |
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163 |
} |
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|
164 |
|
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|
165 |
if (sockop & _SOCKOP_LISTEN && listen(*sock, SOCKET_LISTEN_BACKLOG) == -1) { |
6d615203d963
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|
166 |
PWARNING("listen(%d, %s)", info->ai_family, info->ai_canonname); |
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|
167 |
close(*sock); *sock = -1; |
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|
168 |
continue; |
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|
169 |
} |
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|
170 |
|
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|
171 |
if (sockop & _SOCKOP_ENDPOINT_CONNECT && connect(*sock, info->ai_addr, info->ai_addrlen) == -1) { |
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|
172 |
if (sockop & _SOCKOP_FCNTL_NONBLOCK && errno == EINPROGRESS) { |
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|
173 |
/* to be expected */ |
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|
174 |
|
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|
175 |
} else { |
27
1e79b4cc8f1b
support for static files (.css, .html, .js), and tiles - serves up a full viewer at / now, but the JS code needs cleaning up
Tero Marttila <terom@fixme.fi>
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diff
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|
176 |
PWARNING("connect(%d, %s)", info->ai_family, info->ai_canonname); |
26
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|
177 |
close(*sock); *sock = -1; |
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|
178 |
continue; |
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|
179 |
} |
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|
180 |
} |
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|
181 |
|
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|
182 |
// copy the succesfull address over |
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parents:
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|
183 |
memcpy(addr, info->ai_addr, info->ai_addrlen); |
6d615203d963
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parents:
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|
184 |
|
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parents:
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|
185 |
// exit the loop with a valid socket |
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|
186 |
assert(*sock != -1); |
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|
187 |
break; |
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|
188 |
} |
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parents:
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|
189 |
|
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|
190 |
if (*sock == -1) |
6d615203d963
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Tero Marttila <terom@fixme.fi>
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|
191 |
ERROR("no working results from getaddrinfo: %s#%s", endpoint->af.inet.addr, endpoint->af.inet.port); |
6d615203d963
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Tero Marttila <terom@fixme.fi>
parents:
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|
192 |
|
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|
193 |
return 0; |
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Tero Marttila <terom@fixme.fi>
parents:
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|
194 |
|
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|
195 |
error: |
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Tero Marttila <terom@fixme.fi>
parents:
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|
196 |
if (res != 0 && res != &_fake_res) |
6d615203d963
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Tero Marttila <terom@fixme.fi>
parents:
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|
197 |
freeaddrinfo(res); |
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parents:
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|
198 |
|
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|
199 |
return -1; |
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|
200 |
} |
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|
201 |