1 /* network.c -- network management stuff
3 * author: hackbard@hackdaworld.dyndns.org
9 int network_init(t_net *net,int outfd) {
11 dprintf(net->outfd,"[network] initializing network api ...\n");
13 memset(net->connection,0,MAX_CONNECTIONS*sizeof(t_connection));
21 int network_set_timeout_chan(t_net *net,int chan,int read,int write) {
26 len=sizeof(struct timeval);
31 setsockopt(net->connection[chan].fd,SOL_SOCKET,SO_RCVTIMEO,&to,len);
33 setsockopt(net->connection[chan].fd,SOL_SOCKET,SO_SNDTIMEO,&to,len);
38 int network_listen(t_net *net) {
40 struct sockaddr_in addr;
43 if((net->l_fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
44 perror("[network] socket call");
48 memset(&addr,0,sizeof(struct sockaddr));
49 addr.sin_family=AF_INET;
50 addr.sin_port=htons(net->l_port);
51 addr.sin_addr.s_addr=INADDR_ANY;
53 if(bind(net->l_fd,(struct sockaddr *)&addr,
54 sizeof(struct sockaddr))==-1) {
57 if(setsockopt(net->l_fd,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(true))==-1) {
58 perror("[network] setsockopt call");
61 dprintf(net->outfd,"[network] reused address\n");
64 if(listen(net->l_fd,MAX_LISTEN_QUEUE)==-1) {
65 perror("[network] listen call");
69 dprintf(net->outfd,"[network] listen on %s port %d\n",
70 inet_ntoa(addr.sin_addr),net->l_port);
75 int network_shutdown(t_net *net) {
79 for(channel=0;channel<MAX_CONNECTIONS;channel++)
80 if(net->connection[channel].status&C_SOCKET)
81 close(net->connection[channel].fd);
83 if(close(net->l_fd)==-1) {
84 perror("[network] close call");
88 dprintf(net->outfd,"[network] shutdown\n");
93 int network_set_listen_port(t_net *net,in_port_t port) {
100 int network_manage_connection(t_net *net) {
103 struct sockaddr_in addr;
105 for(i=0;i<MAX_CONNECTIONS;i++) {
107 if(net->connection[i].status&C_IN_USE) {
109 if(net->connection[i].status&C_HANGUP) {
110 if(close(net->connection[i].fd)==-1) {
111 perror("[network] close call");
114 dprintf(net->outfd,"[network] connection %d closed\n",i);
115 net->connection[i].status=0;
118 if(net->connection[i].status&C_INFO_A) {
120 if(!(net->connection[i].status&C_SOCKET)) {
121 if((net->connection[i].fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
122 perror("[network] socket call");
125 net->connection[i].status|=C_SOCKET;
128 if((!(net->connection[i].status&C_ESTABL))&&
129 (net->connection[i].status&C_SOCKET)) {
131 memset(&addr,0,sizeof(struct sockaddr));
132 addr.sin_family=AF_INET;
133 addr.sin_port=htons(net->connection[i].port);
134 if(!inet_aton(net->connection[i].ip,&(addr.sin_addr))) {
135 perror("[network] inet_aton call");
139 if(connect(net->connection[i].fd,(struct sockaddr *)&addr,
140 sizeof(struct sockaddr))==-1) {
141 perror("[network] connect call");
145 dprintf(net->outfd,"[network] established connection to ");
146 dprintf(net->outfd,"%s port %d on channel %d\n",
147 net->connection[i].ip,net->connection[i].port,i);
148 net->connection[i].status|=C_ESTABL;
161 int network_connect(t_net *net,int channel) {
163 if(net->connection[channel].status&C_IN_USE) {
164 dprintf(net->outfd,"[network] connect failed, channel %02d in use\n",
168 if(!(net->connection[channel].status&C_INFO_A)) {
170 "[network] connect failed, missing config for chan %02d\n",channel);
174 /* try connect & return result */
175 net->connection[channel].status|=C_IN_USE;
176 return(network_manage_connection(net)); /* could be other channel too */
179 int network_close(t_net *net,int channel) {
181 if(!(net->connection[channel].status&C_ESTABL)) {
182 dprintf(net->outfd,"[network] close failed, channel %02d not active\n",
187 net->connection[channel].status|=C_HANGUP;
188 return(network_manage_connection(net)); /* could be other channel too */
191 int network_close_all(t_net *net) {
195 for(channel=0;channel<MAX_CONNECTIONS;channel++)
196 if(net->connection[channel].status&C_ESTABL) network_close(net,channel);
201 int network_set_connection_info(t_net *net,int channel,char *ip,int port) {
203 if(net->connection[channel].status&C_IN_USE) {
205 "[network] set connection failed, channel %02d in use\n",channel);
209 strncpy(net->connection[channel].ip,ip,IP_DIGITS);
210 net->connection[channel].port=port;
211 net->connection[channel].status|=C_INFO_A;
216 int network_select(t_net *net,int channel) {
220 if(channel==MAX_CONNECTIONS) mask=0xffffffff;
221 else mask=(1<<channel);
227 int network_deselect(t_net *net,int channel) {
231 if(channel==MAX_CONNECTIONS) mask=0;
232 else mask=~(1<<channel);
238 int network_manage_incoming(t_net *net) {
241 struct sockaddr_in addr;
244 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
245 if(!(net->connection[channel].status&C_IN_USE)) {
246 if((net->connection[channel].fd=accept(net->l_fd,
247 (struct sockaddr *)&addr,
249 perror("[network] accept call");
252 strncpy(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS);
253 net->connection[channel].port=ntohs(addr.sin_port);
254 net->connection[channel].status=C_IN_USE|C_INFO_A|C_SOCKET|C_ESTABL;
256 "[network] established connection from %s:%d, channel %d\n",
257 net->connection[channel].ip,net->connection[channel].port,
263 dprintf(net->outfd,"[network] maximum connections reached\n");
267 int network_send(int fd,unsigned char *data,int datasize) {
275 if((count=write(fd,data+datasize-left,left))==-1) {
276 perror("[network] write call");
285 int network_send_chan(t_net *net,int chan,unsigned char *data,int datasize) {
287 return(network_send(net->connection[chan].fd,data,datasize));
290 int network_receive(int fd,unsigned char *data,int datasize) {
298 if((count=read(fd,data,datasize))==-1) {
299 perror("[network] read call");
308 int network_receive_chan(t_net *net,int chan,unsigned char *data,int datasize) {
310 return(network_receive(net->connection[chan].fd,data,datasize));
313 int network_udp_listen_init(t_net *net) {
315 struct sockaddr_in addr;
318 if((net->l_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
319 perror("[network] socket call (udp-receive)");
323 memset(&addr,0,sizeof(struct sockaddr));
324 addr.sin_family=AF_INET;
325 addr.sin_port=htons(net->l_udp_port);
326 addr.sin_addr.s_addr=INADDR_ANY;
327 if(bind(net->l_udp_fd,(struct sockaddr *)&addr,sizeof(struct sockaddr))==-1) {
330 if(setsockopt(net->l_udp_fd,SOL_SOCKET,SO_REUSEADDR,
331 &true,sizeof(true))==-1) {
332 perror("[network] setsockopt call (udp)");
335 dprintf(net->outfd,"[network] reused address (udp)\n");
338 dprintf(net->outfd,"[network] listening on port %d (udp)\n",
341 if((net->s_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
342 perror("[network] socket call (udp-send)");
349 int network_udp_receive(t_net *net,int channel, unsigned char *data,int count) {
351 struct sockaddr_in addr;
354 if((count=recvfrom(net->l_udp_fd,data,count,0,
355 (struct sockaddr *)&addr,&len))==-1) {
356 perror("[network] recvfrom call");
360 if(strncmp(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS)) {
361 dprintf(net->outfd,"[network] packet from unknown: %s\n",
362 inet_ntoa(addr.sin_addr));
363 return N_UDP_WRONG_SENDER;
369 int network_udp_send(t_net *net,int channel, unsigned char *data,int size) {
372 struct sockaddr_in addr;
377 memset(&addr,0,sizeof(struct sockaddr));
378 addr.sin_family=AF_INET;
379 addr.sin_port=htons(net->l_udp_port);
380 inet_aton(net->connection[channel].ip,&(addr.sin_addr));
383 if((count=sendto(net->s_udp_fd,data+size-left,left,0,
384 (struct sockaddr *)&addr,sizeof(struct sockaddr)))==-1) {
385 perror("[network] sendto call");
394 int network_udp_shutdown(t_net *net) {
396 if(close(net->l_udp_fd)==-1) {
397 perror("[network] close call (udp-receive)");
401 if(close(net->s_udp_fd)==-1) {
402 perror("[network] close call (udp-send)");