1 /* network.c -- network management stuff
3 * author: hackbard@hackdaworld.dyndns.org
9 int network_init(t_net *net) {
11 struct sockaddr_in addr;
14 puts("[network] initializing network ...");
16 memset(net->connection,0,MAX_CONNECTIONS*sizeof(t_connection));
20 if((net->l_fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
21 perror("[network] socket call");
25 memset(&addr,0,sizeof(struct sockaddr));
26 addr.sin_family=AF_INET;
27 addr.sin_port=htons(net->l_port);
28 addr.sin_addr.s_addr=INADDR_ANY;
30 /* prevent addres in use error message */
32 if(setsockopt(net->l_fd,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(true))==-1) {
33 perror("[network] setsockopt call");
37 if(bind(net->l_fd,(struct sockaddr *)&addr,
38 sizeof(struct sockaddr))==-1) {
39 perror("[network] bind call");
43 if(listen(net->l_fd,MAX_LISTEN_QUEUE)==-1) {
44 perror("[network] listen call");
48 printf("[network] listen on %s port %d\n",inet_ntoa(addr.sin_addr),
54 int network_shutdown(t_net *net) {
58 for(channel=0;channel<MAX_CONNECTIONS;channel++)
59 if(net->connection[channel].status&C_SOCKET)
60 close(net->connection[channel].fd);
62 if(close(net->l_fd)==-1) {
63 perror("[network] close call");
67 puts("[network] shutdown");
72 int network_set_listen_port(t_net *net,in_port_t port) {
79 int network_manage_connection(t_net *net) {
82 struct sockaddr_in addr;
84 for(i=0;i<MAX_CONNECTIONS;i++) {
86 if(net->connection[i].status&C_IN_USE) {
88 if(net->connection[i].status&C_HANGUP) {
89 if(close(net->connection[i].fd)==-1) {
90 perror("[network] close call");
93 printf("[network] connection %d closed\n",i);
94 net->connection[i].status=0;
97 if(net->connection[i].status&C_INFO_A) {
99 if(!net->connection[i].status&C_SOCKET) {
100 if((net->connection[i].fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
101 perror("[network] socket call");
106 if(!net->connection[i].status&C_ESTABL) {
108 memset(&addr,0,sizeof(struct sockaddr));
109 addr.sin_family=AF_INET;
110 addr.sin_port=htons(net->connection[i].port);
111 if(!inet_aton(net->connection[i].ip,&(addr.sin_addr))) {
112 perror("[network] inet_aton call");
116 if(connect(net->connection[i].fd,(struct sockaddr *)&addr,
117 sizeof(struct sockaddr))==-1) {
118 perror("[network] connect call");
122 printf("[network] established connection to %s port %d on channel %d\n",
123 net->connection[i].ip,net->connection[i].port,i);
136 int network_manage_incoming(t_net *net) {
139 struct sockaddr_in addr;
142 for(channel=0;channel<MAX_CONNECTIONS;channel++) {
143 if(!net->connection[channel].status&C_IN_USE) {
144 if((net->connection[channel].fd=accept(net->l_fd,
145 (struct sockaddr *)&addr,
147 perror("[network] accept call");
150 strncpy(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS);
151 net->connection[channel].port=ntohs(addr.sin_port);
152 net->connection[channel].status=C_IN_USE|C_INFO_A|C_SOCKET|C_ESTABL;
153 printf("[network] established connection from %s port %d on channel %d\n",
154 net->connection[channel].ip,net->connection[channel].port,channel);
159 puts("[network] maximum connections reached");
163 int network_send(int fd,unsigned char *data,int datasize) {
171 if((count=write(fd,data+datasize-left,left))==-1) {
172 perror("[network] write call");
181 int network_receive(int fd,unsigned char *data,int datasize) {
185 if((count=read(fd,data,datasize))==-1) {
186 perror("[network] read call");