author | unc0rr |
Wed, 21 Nov 2012 00:16:09 +0400 | |
changeset 8079 | 3f3dd3c9b89e |
parent 7497 | 7e1d72fc03c7 |
child 10017 | de822cd3df3a |
permissions | -rw-r--r-- |
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/* |
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* Hedgewars, a free turn based strategy game |
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* Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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*/ |
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#include "netbase.h" |
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#include "../util/buffer.h" |
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#include "../util/logging.h" |
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#include "../util/util.h" |
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#include "../socket.h" |
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#include <string.h> |
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#include <stdbool.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#define NET_READBUFFER_LIMIT (1024*1024) |
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struct _flib_netbase { |
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flib_vector *readBuffer; |
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flib_tcpsocket *sock; |
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}; |
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flib_netbase *flib_netbase_create(const char *server, uint16_t port) { |
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if(log_badargs_if2(server==NULL, port==0)) { |
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return NULL; |
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} |
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flib_netbase *result = NULL; |
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flib_netbase *newNet = flib_calloc(1, sizeof(flib_netbase)); |
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|
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if(newNet) { |
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newNet->readBuffer = flib_vector_create(); |
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newNet->sock = flib_socket_connect(server, port); |
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if(newNet->readBuffer && newNet->sock) { |
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flib_log_i("Connected to server %s:%u", server, (unsigned)port); |
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result = newNet; |
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newNet = NULL; |
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} |
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} |
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flib_netbase_destroy(newNet); |
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return result; |
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} |
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void flib_netbase_destroy(flib_netbase *net) { |
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if(net) { |
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flib_socket_close(net->sock); |
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flib_vector_destroy(net->readBuffer); |
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free(net); |
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} |
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} |
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bool flib_netbase_connected(flib_netbase *net) { |
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if(!log_badargs_if(net==NULL) && net->sock) { |
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return true; |
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} |
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return false; |
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} |
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|
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/** |
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* Parses and returns a message, and removes it from the vector. |
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*/ |
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static flib_netmsg *parseMessage(flib_vector *vec) { |
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const uint8_t *partStart = flib_vector_data(vec); |
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const uint8_t *end = partStart+flib_vector_size(vec); |
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flib_netmsg *result = flib_netmsg_create(); |
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if(!result) { |
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return NULL; |
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} |
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|
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while(1) { |
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const uint8_t *partEnd = memchr(partStart, '\n', end-partStart); |
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if(!partEnd) { |
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// message incomplete |
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flib_netmsg_destroy(result); |
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return NULL; |
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} else if(partEnd-partStart == 0) { |
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// Zero-length part, message end marker. Remove the message from the vector. |
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uint8_t *vectorStart = flib_vector_data(vec); |
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size_t msgLen = partEnd+1-vectorStart; |
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memmove(vectorStart, partEnd+1, flib_vector_size(vec)-msgLen); |
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flib_vector_resize(vec, flib_vector_size(vec)-msgLen); |
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return result; |
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} else { |
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if(flib_netmsg_append_part(result, partStart, partEnd-partStart)) { |
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flib_netmsg_destroy(result); |
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return NULL; |
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} |
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partStart = partEnd+1; // Skip the '\n' |
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} |
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} |
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return NULL; // Never reached |
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} |
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|
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/** |
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* Receive some bytes and add them to the buffer. |
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* Returns the number of bytes received. |
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* Automatically closes the socket if an error occurs |
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* and sets sock=NULL. |
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*/ |
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static int receiveToBuffer(flib_netbase *net) { |
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uint8_t buffer[256]; |
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|
118 |
if(!net->sock) { |
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|
119 |
return 0; |
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|
120 |
} else if(flib_vector_size(net->readBuffer) > NET_READBUFFER_LIMIT) { |
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|
121 |
flib_log_e("Net connection closed: Net message too big"); |
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|
122 |
flib_socket_close(net->sock); |
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|
123 |
net->sock = NULL; |
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parents:
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|
124 |
return 0; |
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parents:
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|
125 |
} else { |
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|
126 |
int size = flib_socket_nbrecv(net->sock, buffer, sizeof(buffer)); |
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127 |
if(size>=0 && !flib_vector_append(net->readBuffer, buffer, size)) { |
7234
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|
128 |
return size; |
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|
129 |
} else { |
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|
130 |
flib_socket_close(net->sock); |
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|
131 |
net->sock = NULL; |
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parents:
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|
132 |
return 0; |
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parents:
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|
133 |
} |
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parents:
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|
134 |
} |
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parents:
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|
135 |
} |
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parents:
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|
136 |
|
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|
137 |
flib_netmsg *flib_netbase_recv_message(flib_netbase *net) { |
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138 |
if(log_badargs_if(net==NULL)) { |
7234
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|
139 |
return NULL; |
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parents:
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|
140 |
} |
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parents:
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changeset
|
141 |
|
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|
142 |
flib_netmsg *msg; |
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|
143 |
while(!(msg=parseMessage(net->readBuffer)) |
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|
144 |
&& receiveToBuffer(net)) {} |
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parents:
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|
145 |
|
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parents:
diff
changeset
|
146 |
if(msg) { |
613998625a3c
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parents:
diff
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|
147 |
return msg; |
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parents:
diff
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|
148 |
} else if(!net->sock && flib_vector_size(net->readBuffer)>0) { |
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|
149 |
// Connection is down and we didn't get a complete message, just flush the rest. |
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|
150 |
flib_vector_resize(net->readBuffer, 0); |
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parents:
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|
151 |
} |
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parents:
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|
152 |
return NULL; |
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parents:
diff
changeset
|
153 |
} |
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parents:
diff
changeset
|
154 |
|
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parents:
diff
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|
155 |
static void logSentMsg(const uint8_t *data, size_t len) { |
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|
156 |
if(flib_log_isActive(FLIB_LOGLEVEL_DEBUG)) { |
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parents:
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|
157 |
flib_log_d("[NET OUT][%03u]%*.*s",(unsigned)len, (unsigned)len, (unsigned)len, data); |
613998625a3c
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|
158 |
} |
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parents:
diff
changeset
|
159 |
} |
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parents:
diff
changeset
|
160 |
|
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
161 |
int flib_netbase_send_raw(flib_netbase *net, const void *data, size_t len) { |
7316
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Medo <smaxein@googlemail.com>
parents:
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|
162 |
if(log_badargs_if2(net==NULL, data==NULL && len>0)) { |
7234
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parents:
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|
163 |
return -1; |
613998625a3c
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parents:
diff
changeset
|
164 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
165 |
if(!net->sock) { |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
166 |
flib_log_w("flib_netbase_send_raw: Not connected."); |
613998625a3c
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parents:
diff
changeset
|
167 |
return -1; |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
168 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
169 |
|
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
170 |
if(flib_socket_send(net->sock, data, len) == len) { |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
171 |
logSentMsg(data, len); |
613998625a3c
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parents:
diff
changeset
|
172 |
return 0; |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
173 |
} else { |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
174 |
flib_log_w("Failed or incomplete write: net connection lost."); |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
175 |
flib_socket_close(net->sock); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
176 |
net->sock = NULL; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
177 |
return -1; |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
178 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
179 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
180 |
|
7497 | 181 |
int flib_netbase_send_message(flib_netbase *net, const flib_netmsg *msg) { |
7316
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Medo <smaxein@googlemail.com>
parents:
7314
diff
changeset
|
182 |
if(log_badargs_if2(net==NULL, msg==NULL)) { |
7234
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
183 |
return -1; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
184 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
185 |
|
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
186 |
size_t totalSize = 0; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
187 |
for(int i=0; i<msg->partCount; i++) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
188 |
totalSize += strlen(msg->parts[i]) + 1; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
189 |
} |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
190 |
totalSize++; // Last part ends in two '\n' instead of one |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
191 |
|
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
192 |
uint8_t *buffer = flib_malloc(totalSize); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
193 |
if(!buffer) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
194 |
return -1; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
195 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
196 |
size_t pos = 0; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
197 |
for(int i=0; i<msg->partCount; i++) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
198 |
size_t partsize = strlen(msg->parts[i]); |
613998625a3c
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Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
199 |
memcpy(buffer+pos, msg->parts[i], partsize); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
200 |
pos += partsize; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
201 |
buffer[pos++] = '\n'; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
202 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
203 |
buffer[pos++] = '\n'; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
204 |
return flib_netbase_send_raw(net, buffer, pos); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
205 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
206 |
|
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
207 |
int flib_netbase_sendf(flib_netbase *net, const char *format, ...) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
208 |
int result = -1; |
7316
f7b49b2c5d84
frontlib: Improved and unified parameter checking, moved the cmdlineClient out
Medo <smaxein@googlemail.com>
parents:
7314
diff
changeset
|
209 |
if(!log_badargs_if2(net==NULL, format==NULL)) { |
7234
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
210 |
va_list argp; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
211 |
va_start(argp, format); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
212 |
char *buffer = flib_vasprintf(format, argp); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
213 |
if(buffer) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
214 |
result = flib_netbase_send_raw(net, buffer, strlen(buffer)); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
215 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
216 |
free(buffer); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
217 |
va_end(argp); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
218 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
219 |
return result; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
220 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
221 |
|
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
222 |
flib_netmsg *flib_netmsg_create() { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
223 |
flib_netmsg *result = flib_calloc(1, sizeof(flib_netmsg)); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
224 |
if(result) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
225 |
result->partCount = 0; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
226 |
result->parts = NULL; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
227 |
return result; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
228 |
} else { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
229 |
return NULL; |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
230 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
231 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
232 |
|
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
233 |
void flib_netmsg_destroy(flib_netmsg *msg) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
234 |
if(msg) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
235 |
for(int i=0; i<msg->partCount; i++) { |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
236 |
free(msg->parts[i]); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
237 |
} |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
238 |
free(msg->parts); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
239 |
free(msg); |
613998625a3c
frontlib: Started work on the server connection code
Medo <smaxein@googlemail.com>
parents:
diff
changeset
|
240 |
} |
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} |
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242 |
|
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243 |
int flib_netmsg_append_part(flib_netmsg *msg, const void *part, size_t partlen) { |
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int result = -1; |
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if(!log_badargs_if2(msg==NULL, part==NULL && partlen>0)) { |
7234
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char **newParts = realloc(msg->parts, (msg->partCount+1)*sizeof(*msg->parts)); |
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247 |
if(newParts) { |
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248 |
msg->parts = newParts; |
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249 |
msg->parts[msg->partCount] = flib_malloc(partlen+1); |
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if(msg->parts[msg->partCount]) { |
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memcpy(msg->parts[msg->partCount], part, partlen); |
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252 |
msg->parts[msg->partCount][partlen] = 0; |
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253 |
msg->partCount++; |
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254 |
result = 0; |
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|
255 |
} |
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parents:
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|
256 |
} |
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|
257 |
} |
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258 |
return result; |
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frontlib: Started work on the server connection code
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changeset
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259 |
} |