author | Tero Marttila <terom@fixme.fi> |
Sun, 01 Mar 2009 01:48:14 +0200 | |
changeset 21 | 0911d0b828d4 |
parent 12 | 4147fae232d9 |
child 27 | e6639132bead |
permissions | -rw-r--r-- |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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#include "sock_tcp.h" |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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#include <stdlib.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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#include <sys/types.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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#include <sys/socket.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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#include <netdb.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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#include <unistd.h> |
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#include <fcntl.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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#include <string.h> |
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#include <assert.h> |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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/* |
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* Our basic socket event handler for driving our callbacks |
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*/ |
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static void sock_tcp_event_handler (evutil_socket_t fd, short what, void *arg) |
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{ |
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struct sock_tcp *sock = arg; |
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// invoke appropriate callback |
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sock_stream_invoke_callbacks(SOCK_TCP_BASE(sock), what); |
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} |
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/* |
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* Our sock_stream_methods.read method |
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*/ |
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static err_t sock_tcp_read (struct sock_stream *base_sock, void *buf, size_t *len) |
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parents:
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{ |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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struct sock_tcp *sock = SOCK_FROM_BASE(base_sock, struct sock_tcp); |
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int ret; |
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// read(), and detect non-EAGAIN or EOF |
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if ((ret = read(sock->fd, buf, *len)) < 0 && errno != EAGAIN) |
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// unexpected error |
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RETURN_SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_READ); |
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else if (ret == 0) |
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// EOF |
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return SET_ERROR(SOCK_TCP_ERR(sock), ERR_READ_EOF); |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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if (ret < 0) { |
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// EAGAIN -> zero bytes |
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*len = 0; |
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} else { |
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// normal -> bytes read |
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*len = ret; |
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} |
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// ok |
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return SUCCESS; |
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} |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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/* |
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* Our sock_stream_methods.write method |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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*/ |
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static err_t sock_tcp_write (struct sock_stream *base_sock, const void *buf, size_t *len) |
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{ |
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struct sock_tcp *sock = SOCK_FROM_BASE(base_sock, struct sock_tcp); |
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int ret; |
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// write(), and detect non-EAGAIN or EOF |
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if ((ret = write(sock->fd, buf, *len)) < 0 && errno != EAGAIN) |
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// unexpected error |
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RETURN_SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_WRITE); |
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|
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else if (ret == 0) |
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// EOF |
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return SET_ERROR(SOCK_TCP_ERR(sock), ERR_WRITE_EOF); |
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if (ret < 0) { |
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// EAGAIN -> zero bytes |
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*len = 0; |
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} else { |
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// normal -> bytes read |
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*len = ret; |
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} |
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return SUCCESS; |
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} |
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static err_t sock_tcp_event_init (struct sock_stream *base_sock) |
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{ |
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struct sock_tcp *sock = SOCK_FROM_BASE(base_sock, struct sock_tcp); |
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err_t err; |
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// set nonblocking |
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if ((err = sock_tcp_set_nonblock(sock, 1))) |
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return err; |
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|
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// add ourselves as the event handler |
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if ((err = sock_tcp_init_ev(sock, &sock_tcp_event_handler, sock))) |
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return err; |
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// done |
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return SUCCESS; |
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} |
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|
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static err_t sock_tcp_event_enable (struct sock_stream *base_sock, short mask) |
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{ |
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struct sock_tcp *sock = SOCK_FROM_BASE(base_sock, struct sock_tcp); |
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// implemented in sock_tcp_add_event |
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return sock_tcp_add_event(sock, mask); |
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} |
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110 |
/* |
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111 |
* Our sock_stream_type |
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112 |
*/ |
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113 |
struct sock_stream_type sock_tcp_type = { |
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114 |
.methods.read = &sock_tcp_read, |
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115 |
.methods.write = &sock_tcp_write, |
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116 |
.methods.event_init = &sock_tcp_event_init, |
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117 |
.methods.event_enable = &sock_tcp_event_enable, |
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118 |
}; |
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119 |
|
3 | 120 |
err_t sock_tcp_alloc (struct sock_tcp **sock_ptr) |
1
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121 |
{ |
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122 |
// alloc |
3 | 123 |
if ((*sock_ptr = calloc(1, sizeof(**sock_ptr))) == NULL) |
124 |
return ERR_CALLOC; |
|
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125 |
|
3 | 126 |
// initialize base with sock_tcp_type |
127 |
sock_stream_init(SOCK_TCP_BASE(*sock_ptr), &sock_tcp_type); |
|
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128 |
|
21 | 129 |
// invalid fds are <0 |
130 |
(*sock_ptr)->fd = -1; |
|
131 |
||
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132 |
// done |
3 | 133 |
return SUCCESS; |
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134 |
} |
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135 |
|
3 | 136 |
err_t sock_tcp_init_fd (struct sock_tcp *sock, int fd) |
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137 |
{ |
3 | 138 |
// valid fd -XXX: err instead? |
139 |
assert(fd >= 0); |
|
140 |
||
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141 |
// initialize |
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142 |
sock->fd = fd; |
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143 |
|
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144 |
// done |
3 | 145 |
return SUCCESS; |
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146 |
} |
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|
147 |
|
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148 |
err_t sock_tcp_init_ev (struct sock_tcp *sock, void (*ev_cb)(evutil_socket_t, short, void *), void *cb_arg) |
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149 |
{ |
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150 |
// require valid fd |
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|
151 |
assert(sock->fd >= 0); |
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152 |
|
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153 |
// this is initialization |
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154 |
assert(sock->ev_read == NULL && sock->ev_write == NULL); |
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155 |
|
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|
156 |
// create new event |
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157 |
if ((sock->ev_read = event_new(_sock_stream_ctx.ev_base, sock->fd, EV_READ, ev_cb, cb_arg)) == NULL) |
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158 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_NEW); |
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159 |
|
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|
160 |
if ((sock->ev_write = event_new(_sock_stream_ctx.ev_base, sock->fd, EV_WRITE, ev_cb, cb_arg)) == NULL) |
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|
161 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_NEW); |
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162 |
|
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163 |
// ok |
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|
164 |
return SUCCESS; |
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|
165 |
} |
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|
166 |
|
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|
167 |
err_t sock_tcp_add_event (struct sock_tcp *sock, short mask) |
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168 |
{ |
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|
169 |
// just add the appropraite events |
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|
170 |
if (mask & EV_READ && event_add(sock->ev_read, NULL)) |
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|
171 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_ADD); |
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|
172 |
|
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|
173 |
if (mask & EV_WRITE && event_add(sock->ev_write, NULL)) |
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|
174 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_ADD); |
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|
175 |
|
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|
176 |
// done |
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|
177 |
return SUCCESS; |
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178 |
} |
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|
179 |
|
3 | 180 |
err_t sock_tcp_init_connect (struct sock_tcp *sock, const char *hostname, const char *service) |
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181 |
{ |
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182 |
struct addrinfo hints, *res, *r; |
3 | 183 |
int err; |
184 |
RESET_ERROR(SOCK_TCP_ERR(sock)); |
|
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185 |
|
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186 |
// hints |
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|
187 |
memset(&hints, 0, sizeof(hints)); |
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
188 |
hints.ai_family = AF_UNSPEC; |
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|
189 |
hints.ai_socktype = SOCK_STREAM; |
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190 |
|
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|
191 |
// resolve |
3 | 192 |
if ((err = getaddrinfo(hostname, service, &hints, &res))) |
193 |
RETURN_SET_ERROR_EXTRA(SOCK_TCP_ERR(sock), ERR_GETADDRINFO, err); |
|
1
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|
194 |
|
3 | 195 |
// try each result in turn |
1
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|
196 |
for (r = res; r; r = r->ai_next) { |
3 | 197 |
// create the socket |
198 |
if ((sock->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) < 0) { |
|
199 |
// remember error |
|
200 |
SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_SOCKET); |
|
1
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|
201 |
|
3 | 202 |
// skip to next one |
203 |
continue; |
|
204 |
} |
|
205 |
||
206 |
// connect to remote address |
|
207 |
if (connect(sock->fd, r->ai_addr, r->ai_addrlen)) { |
|
208 |
// remember error |
|
209 |
SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_CONNECT); |
|
210 |
||
211 |
// close/invalidate socket |
|
212 |
close(sock->fd); |
|
213 |
sock->fd = -1; |
|
1
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|
214 |
|
3 | 215 |
// skip to next one |
216 |
continue; |
|
217 |
} |
|
218 |
||
219 |
// valid socket, use this |
|
1
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|
220 |
break; |
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|
221 |
} |
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|
222 |
|
3 | 223 |
// ensure we got some valid socket, else return last error code |
224 |
if (sock->fd < 0) { |
|
225 |
// did we hit some error? |
|
226 |
if (IS_ERROR(SOCK_TCP_ERR(sock))) |
|
227 |
// return last error |
|
228 |
return ERROR_CODE(SOCK_TCP_ERR(sock)); |
|
229 |
||
230 |
else |
|
231 |
// no results |
|
232 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_GETADDRINFO_EMPTY); |
|
233 |
} |
|
1
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234 |
|
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235 |
// ok, done |
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236 |
return 0; |
1
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237 |
} |
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|
238 |
|
10
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|
239 |
err_t sock_tcp_set_nonblock (struct sock_tcp *sock, int nonblock) |
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240 |
{ |
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|
241 |
// fcntl it |
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|
242 |
// XXX: maintain old flags? |
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|
243 |
if (fcntl(sock->fd, F_SETFL, nonblock ? O_NONBLOCK : 0) < 0) |
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|
244 |
RETURN_SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_FCNTL); |
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245 |
|
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|
246 |
// ok |
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|
247 |
return SUCCESS; |
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|
248 |
} |
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|
249 |
|
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|
250 |
void sock_tcp_release (struct sock_tcp *sock) |
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251 |
{ |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
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252 |
// must not be connected |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
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253 |
assert(sock->fd < 0); |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
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254 |
|
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
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255 |
// free |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
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256 |
free(sock); |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
diff
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|
257 |
} |
9fe218576d13
fix sock_stream read/write return value, move line buffer inside of line_proto, add some initial code for event-based non-blocking operation
Tero Marttila <terom@fixme.fi>
parents:
8
diff
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258 |
|
3 | 259 |
err_t sock_tcp_connect (struct sock_stream **sock_ptr, const char *host, const char *service, struct error_info *err_info) |
2
a834f0559939
working SSL using gnutls - a bit of a painful process
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260 |
{ |
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working SSL using gnutls - a bit of a painful process
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261 |
struct sock_tcp *sock; |
3 | 262 |
err_t err; |
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263 |
|
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working SSL using gnutls - a bit of a painful process
Tero Marttila <terom@fixme.fi>
parents:
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264 |
// allocate |
3 | 265 |
if ((err = sock_tcp_alloc(&sock))) |
266 |
return err; |
|
2
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267 |
|
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268 |
// connect |
3 | 269 |
if ((err = sock_tcp_init_connect(sock, host, service))) { |
8
be88e543c8ff
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parents:
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270 |
// copy error_info |
be88e543c8ff
split off line_proto, and make sock_stream_error return a const error_info
Tero Marttila <terom@fixme.fi>
parents:
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271 |
SET_ERROR_INFO(err_info, sock_stream_error(SOCK_TCP_BASE(sock))); |
2
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parents:
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272 |
|
3 | 273 |
// cleanup |
274 |
sock_tcp_release(sock); |
|
275 |
||
276 |
// return error code |
|
277 |
return err; |
|
278 |
} |
|
279 |
||
280 |
// good |
|
281 |
*sock_ptr = SOCK_TCP_BASE(sock); |
|
282 |
||
283 |
return 0; |
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284 |
} |
3 | 285 |
|
286 |