author | Tero Marttila <terom@fixme.fi> |
Thu, 12 Mar 2009 18:11:44 +0200 | |
changeset 37 | 4fe4a3c4496e |
parent 30 | 7f8dd120933f |
child 40 | 51678c7eae03 |
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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parents:
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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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#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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cf0e1bb6bcab
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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add irc_conn_callbacks, and delay irc_chan_join until on_registered
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(void) fd; |
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add irc_conn_callbacks, and delay irc_chan_join until on_registered
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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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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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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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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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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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// 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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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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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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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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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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/* |
3 | 57 |
* Our sock_stream_methods.write method |
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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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|
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// done |
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100 |
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 |
static void sock_tcp_release (struct sock_stream *base_sock) |
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|
112 |
{ |
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|
113 |
struct sock_tcp *sock = SOCK_FROM_BASE(base_sock, struct sock_tcp); |
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|
114 |
|
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|
115 |
// close and free |
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|
116 |
sock_tcp_close(sock); |
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|
117 |
sock_tcp_free(sock); |
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|
118 |
} |
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|
119 |
|
1
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120 |
/* |
2
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|
121 |
* Our sock_stream_type |
1
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122 |
*/ |
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|
123 |
struct sock_stream_type sock_tcp_type = { |
27
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|
124 |
.methods = { |
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|
125 |
.read = &sock_tcp_read, |
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|
126 |
.write = &sock_tcp_write, |
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|
127 |
.event_init = &sock_tcp_event_init, |
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|
128 |
.event_enable = &sock_tcp_event_enable, |
28
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|
129 |
.release = &sock_tcp_release, |
27
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|
130 |
}, |
1
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131 |
}; |
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132 |
|
3 | 133 |
err_t sock_tcp_alloc (struct sock_tcp **sock_ptr) |
1
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134 |
{ |
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|
135 |
// alloc |
3 | 136 |
if ((*sock_ptr = calloc(1, sizeof(**sock_ptr))) == NULL) |
137 |
return ERR_CALLOC; |
|
2
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|
138 |
|
3 | 139 |
// initialize base with sock_tcp_type |
140 |
sock_stream_init(SOCK_TCP_BASE(*sock_ptr), &sock_tcp_type); |
|
1
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|
141 |
|
21 | 142 |
// invalid fds are <0 |
143 |
(*sock_ptr)->fd = -1; |
|
144 |
||
2
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|
145 |
// done |
3 | 146 |
return SUCCESS; |
2
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|
147 |
} |
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|
148 |
|
3 | 149 |
err_t sock_tcp_init_fd (struct sock_tcp *sock, int fd) |
2
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|
150 |
{ |
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|
151 |
// valid fd |
3 | 152 |
assert(fd >= 0); |
153 |
||
1
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|
154 |
// initialize |
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|
155 |
sock->fd = fd; |
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|
156 |
|
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|
157 |
// done |
3 | 158 |
return SUCCESS; |
1
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159 |
} |
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|
160 |
|
10
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|
161 |
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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162 |
{ |
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|
163 |
// require valid fd |
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|
164 |
assert(sock->fd >= 0); |
11
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|
165 |
|
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|
166 |
// this is initialization |
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|
167 |
assert(sock->ev_read == NULL && sock->ev_write == NULL); |
10
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|
168 |
|
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|
169 |
// create new event |
11
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|
170 |
if ((sock->ev_read = event_new(_sock_stream_ctx.ev_base, sock->fd, EV_READ, ev_cb, cb_arg)) == NULL) |
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|
171 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_NEW); |
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|
172 |
|
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|
173 |
if ((sock->ev_write = event_new(_sock_stream_ctx.ev_base, sock->fd, EV_WRITE, ev_cb, cb_arg)) == NULL) |
10
9fe218576d13
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|
174 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_NEW); |
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|
175 |
|
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|
176 |
// ok |
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|
177 |
return SUCCESS; |
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|
178 |
} |
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|
179 |
|
12
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|
180 |
err_t sock_tcp_add_event (struct sock_tcp *sock, short mask) |
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|
181 |
{ |
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|
182 |
// just add the appropraite events |
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|
183 |
if (mask & EV_READ && event_add(sock->ev_read, NULL)) |
4147fae232d9
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|
184 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_ADD); |
4147fae232d9
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|
185 |
|
4147fae232d9
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|
186 |
if (mask & EV_WRITE && event_add(sock->ev_write, NULL)) |
4147fae232d9
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|
187 |
return SET_ERROR(SOCK_TCP_ERR(sock), ERR_EVENT_ADD); |
4147fae232d9
update sock_stream_read/write semantics for EOF/EAGAIN, tentative event-based gnutls code
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|
188 |
|
4147fae232d9
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|
189 |
// done |
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|
190 |
return SUCCESS; |
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|
191 |
} |
4147fae232d9
update sock_stream_read/write semantics for EOF/EAGAIN, tentative event-based gnutls code
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|
192 |
|
3 | 193 |
err_t sock_tcp_init_connect (struct sock_tcp *sock, const char *hostname, const char *service) |
1
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194 |
{ |
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|
195 |
struct addrinfo hints, *res, *r; |
29
3f0f2898fea3
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|
196 |
int ret; |
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|
197 |
struct error_info *err = SOCK_TCP_ERR(sock); |
3f0f2898fea3
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|
198 |
|
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|
199 |
// zero error code |
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|
200 |
RESET_ERROR(err); |
1
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|
201 |
|
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|
202 |
// hints |
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|
203 |
memset(&hints, 0, sizeof(hints)); |
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
204 |
hints.ai_family = AF_UNSPEC; |
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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changeset
|
205 |
hints.ai_socktype = SOCK_STREAM; |
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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parents:
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|
206 |
|
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
207 |
// resolve |
29
3f0f2898fea3
add sock_gnutls_destroy, and error cleanup for sock_ssl_connect. Fix various XXX's
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|
208 |
if ((ret = getaddrinfo(hostname, service, &hints, &res))) |
3f0f2898fea3
add sock_gnutls_destroy, and error cleanup for sock_ssl_connect. Fix various XXX's
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|
209 |
RETURN_SET_ERROR_EXTRA(err, ERR_GETADDRINFO, ret); |
1
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
210 |
|
3 | 211 |
// try each result in turn |
1
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|
212 |
for (r = res; r; r = r->ai_next) { |
3 | 213 |
// create the socket |
214 |
if ((sock->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) < 0) { |
|
215 |
// remember error |
|
29
3f0f2898fea3
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|
216 |
SET_ERROR_ERRNO(err, ERR_SOCKET); |
1
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
217 |
|
3 | 218 |
// skip to next one |
219 |
continue; |
|
220 |
} |
|
221 |
||
222 |
// connect to remote address |
|
223 |
if (connect(sock->fd, r->ai_addr, r->ai_addrlen)) { |
|
224 |
// remember error |
|
29
3f0f2898fea3
add sock_gnutls_destroy, and error cleanup for sock_ssl_connect. Fix various XXX's
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|
225 |
SET_ERROR_ERRNO(err, ERR_CONNECT); |
3 | 226 |
|
227 |
// close/invalidate socket |
|
228 |
close(sock->fd); |
|
229 |
sock->fd = -1; |
|
1
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a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
230 |
|
3 | 231 |
// skip to next one |
232 |
continue; |
|
233 |
} |
|
234 |
||
235 |
// valid socket, use this |
|
1
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|
236 |
break; |
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
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|
237 |
} |
cf0e1bb6bcab
a fancy socket abstraction layer, with TCP, next, SSL. Also, .hgignore
Tero Marttila <terom@fixme.fi>
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238 |
|
3 | 239 |
// ensure we got some valid socket, else return last error code |
240 |
if (sock->fd < 0) { |
|
241 |
// did we hit some error? |
|
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242 |
if (IS_ERROR(err)) |
3 | 243 |
// return last error |
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244 |
return ERROR_CODE(err); |
3 | 245 |
|
246 |
else |
|
247 |
// no results |
|
29
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|
248 |
return SET_ERROR(err, ERR_GETADDRINFO_EMPTY); |
3 | 249 |
} |
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250 |
|
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251 |
// ok, done |
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252 |
return 0; |
1
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253 |
} |
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|
254 |
|
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|
255 |
err_t sock_tcp_set_nonblock (struct sock_tcp *sock, int nonblock) |
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256 |
{ |
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257 |
// fcntl it |
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|
258 |
// XXX: maintain old flags? |
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|
259 |
if (fcntl(sock->fd, F_SETFL, nonblock ? O_NONBLOCK : 0) < 0) |
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|
260 |
RETURN_SET_ERROR_ERRNO(SOCK_TCP_ERR(sock), ERR_FCNTL); |
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|
261 |
|
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|
262 |
// ok |
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|
263 |
return SUCCESS; |
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|
264 |
} |
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|
265 |
|
29
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|
266 |
err_t sock_tcp_close (struct sock_tcp *sock) |
28
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|
267 |
{ |
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|
268 |
struct error_info *err = SOCK_TCP_ERR(sock); |
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|
269 |
|
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|
270 |
// no errors yet |
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|
271 |
RESET_ERROR(err); |
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|
272 |
|
28
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|
273 |
// must be connected |
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|
274 |
assert(sock->fd >= 0); |
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|
275 |
|
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|
276 |
// kill any events |
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|
277 |
if (sock->ev_read) |
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|
278 |
event_del(sock->ev_read); |
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|
279 |
|
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|
280 |
if (sock->ev_write) |
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|
281 |
event_del(sock->ev_write); |
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|
282 |
|
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|
283 |
// close the socket itself |
29
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|
284 |
if (close(sock->fd)) |
3f0f2898fea3
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|
285 |
SET_ERROR_ERRNO(err, ERR_CLOSE); |
28
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|
286 |
|
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|
287 |
// invalidate |
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|
288 |
sock->fd = -1; |
29
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|
289 |
|
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|
290 |
return ERROR_CODE(err); |
28
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|
291 |
} |
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|
292 |
|
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|
293 |
void sock_tcp_free (struct sock_tcp *sock) |
10
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|
294 |
{ |
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|
295 |
// must not be connected |
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|
296 |
assert(sock->fd < 0); |
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|
297 |
|
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|
298 |
// free |
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|
299 |
free(sock); |
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|
300 |
} |
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|
301 |
|
3 | 302 |
err_t sock_tcp_connect (struct sock_stream **sock_ptr, const char *host, const char *service, struct error_info *err_info) |
2
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303 |
{ |
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|
304 |
struct sock_tcp *sock; |
3 | 305 |
err_t err; |
2
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|
306 |
|
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|
307 |
// allocate |
3 | 308 |
if ((err = sock_tcp_alloc(&sock))) |
309 |
return err; |
|
2
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|
310 |
|
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|
311 |
// connect |
3 | 312 |
if ((err = sock_tcp_init_connect(sock, host, service))) { |
8
be88e543c8ff
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|
313 |
// copy error_info |
be88e543c8ff
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|
314 |
SET_ERROR_INFO(err_info, sock_stream_error(SOCK_TCP_BASE(sock))); |
2
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|
315 |
|
3 | 316 |
// cleanup |
28
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|
317 |
sock_tcp_free(sock); |
3 | 318 |
|
319 |
// return error code |
|
320 |
return err; |
|
321 |
} |
|
322 |
||
323 |
// good |
|
324 |
*sock_ptr = SOCK_TCP_BASE(sock); |
|
325 |
||
326 |
return 0; |
|
2
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|
327 |
} |
3 | 328 |
|
329 |