-/* network.c -- network management stuff
- *
- * author: hackbard@hackdaworld.dyndns.org
- *
- */
-
-#include "network.h"
-
-int network_init(t_net *net) {
-
- struct sockaddr_in addr;
- int true;
-
- puts("[network] initializing network ...");
-
- memset(net->connection,0,MAX_CONNECTIONS*sizeof(t_connection));
- net->c_count=0;
- net->sendmask=0;
-
- if((net->l_fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
- perror("[network] socket call");
- return N_ERROR;
- }
-
- memset(&addr,0,sizeof(struct sockaddr));
- addr.sin_family=AF_INET;
- addr.sin_port=htons(net->l_port);
- addr.sin_addr.s_addr=INADDR_ANY;
-
- if(bind(net->l_fd,(struct sockaddr *)&addr,
- sizeof(struct sockaddr))==-1) {
- /* try harder ... */
- true=1;
- if(setsockopt(net->l_fd,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(true))==-1) {
- perror("[network] setsockopt call");
- return N_ERROR;
- }
- puts("[network] reused address");
- }
-
- if(listen(net->l_fd,MAX_LISTEN_QUEUE)==-1) {
- perror("[network] listen call");
- return N_ERROR;
- }
-
- printf("[network] listen on %s port %d\n",inet_ntoa(addr.sin_addr),
- net->l_port);
-
- return N_SUCCESS;
-}
-
-int network_shutdown(t_net *net) {
-
- int channel;
-
- for(channel=0;channel<MAX_CONNECTIONS;channel++)
- if(net->connection[channel].status&C_SOCKET)
- close(net->connection[channel].fd);
-
- if(close(net->l_fd)==-1) {
- perror("[network] close call");
- return N_ERROR;
- }
-
- puts("[network] shutdown");
-
- return N_SUCCESS;
-}
-
-int network_set_listen_port(t_net *net,in_port_t port) {
-
- net->l_port=port;
-
- return N_SUCCESS;
-}
-
-int network_manage_connection(t_net *net) {
-
- int i;
- struct sockaddr_in addr;
-
- for(i=0;i<MAX_CONNECTIONS;i++) {
-
- if(net->connection[i].status&C_IN_USE) {
-
- if(net->connection[i].status&C_HANGUP) {
- if(close(net->connection[i].fd)==-1) {
- perror("[network] close call");
- return N_E_CLOSE;
- }
- printf("[network] connection %d closed\n",i);
- net->connection[i].status=0;
- }
-
- if(net->connection[i].status&C_INFO_A) {
-
- if(!(net->connection[i].status&C_SOCKET)) {
- if((net->connection[i].fd=socket(AF_INET,SOCK_STREAM,0))==-1) {
- perror("[network] socket call");
- return N_ERROR;
- }
- net->connection[i].status|=C_SOCKET;
- }
-
- if((!(net->connection[i].status&C_ESTABL))&&
- (net->connection[i].status&C_SOCKET)) {
-
- memset(&addr,0,sizeof(struct sockaddr));
- addr.sin_family=AF_INET;
- addr.sin_port=htons(net->connection[i].port);
- if(!inet_aton(net->connection[i].ip,&(addr.sin_addr))) {
- perror("[network] inet_aton call");
- return N_ERROR;
- }
-
- if(connect(net->connection[i].fd,(struct sockaddr *)&addr,
- sizeof(struct sockaddr))==-1) {
- perror("[network] connect call");
- return N_E_CONNECT;
- }
-
- printf("[network] established connection to ");
- printf("%s port %d on channel %d\n",net->connection[i].ip,
- net->connection[i].port,i);
- net->connection[i].status|=C_ESTABL;
-
- }
-
- }
-
- }
-
- }
-
- return N_SUCCESS;
-}
-
-int network_connect(t_net *net,int channel) {
-
- if(net->connection[channel].status&C_IN_USE) {
- printf("[network] connect failed, channel %02d in use\n",channel);
- return N_E_IN_USE;
- }
- if(!(net->connection[channel].status&C_INFO_A)) {
- printf("[network] connect failed, missing configuration for channel %02d\n",
- channel);
- return N_E_NO_INFO;
- }
-
- /* try connect & return result */
- net->connection[channel].status|=C_IN_USE;
- return(network_manage_connection(net)); /* could be other channel too */
-}
-
-int network_close(t_net *net,int channel) {
-
- if(!(net->connection[channel].status&C_ESTABL)) {
- printf("[network] close failed, channel %02d not active\n",channel);
- return N_E_NC;
- }
-
- net->connection[channel].status|=C_HANGUP;
- return(network_manage_connection(net)); /* could be other channel too */
-}
-
-int network_close_all(t_net *net) {
-
- int channel;
-
- for(channel=0;channel<MAX_CONNECTIONS;channel++)
- if(net->connection[channel].status&C_ESTABL) network_close(net,channel);
-
- return N_SUCCESS;
-}
-
-int network_set_connection_info(t_net *net,int channel,char *ip,int port) {
-
- if(net->connection[channel].status&C_IN_USE) {
- printf("[network] set connection failed, channel %02d in use\n",channel);
- return N_E_IN_USE;
- }
-
- strncpy(net->connection[channel].ip,ip,IP_DIGITS);
- net->connection[channel].port=port;
- net->connection[channel].status|=C_INFO_A;
-
- return N_SUCCESS;
-}
-
-int network_select(t_net *net,int channel) {
-
- int mask;
-
- if(channel==MAX_CONNECTIONS) mask=0xffffffff;
- else mask=(1<<channel);
- net->sendmask|=mask;
-
- return N_SUCCESS;
-}
-
-int network_deselect(t_net *net,int channel) {
-
- int mask;
-
- if(channel==MAX_CONNECTIONS) mask=0;
- else mask=~(1<<channel);
- net->sendmask&=mask;
-
- return N_SUCCESS;
-}
-
-int network_manage_incoming(t_net *net) {
-
- int channel;
- struct sockaddr_in addr;
- int len;
-
- for(channel=0;channel<MAX_CONNECTIONS;channel++) {
- if(!(net->connection[channel].status&C_IN_USE)) {
- if((net->connection[channel].fd=accept(net->l_fd,
- (struct sockaddr *)&addr,
- &len))==-1) {
- perror("[network] accept call");
- return N_E_ACCEPT;
- }
- strncpy(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS);
- net->connection[channel].port=ntohs(addr.sin_port);
- net->connection[channel].status=C_IN_USE|C_INFO_A|C_SOCKET|C_ESTABL;
- printf("[network] established connection from %s port %d on channel %d\n",
- net->connection[channel].ip,net->connection[channel].port,channel);
- return channel;
- }
- }
-
- puts("[network] maximum connections reached");
- return N_E_MAXC;
-}
-
-int network_send(int fd,unsigned char *data,int datasize) {
-
- int count,left;
-
- count=0;
- left=datasize;
-
- while(left) {
- if((count=write(fd,data+datasize-left,left))==-1) {
- perror("[network] write call");
- return N_ERROR;
- }
- left-=count;
- }
-
- return N_SUCCESS;
-}
-
-int network_receive(int fd,unsigned char *data,int datasize) {
-
- int count;
-
- if((count=read(fd,data,datasize))==-1) {
- perror("[network] read call");
- return N_ERROR;
- }
-
- return count;
-}
-
-int network_udp_listen_init(t_net *net) {
-
- struct sockaddr_in addr;
- int true;
-
- if((net->l_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
- perror("[network] socket call (udp-receive)");
- return N_ERROR;
- }
-
- memset(&addr,0,sizeof(struct sockaddr));
- addr.sin_family=AF_INET;
- addr.sin_port=htons(net->l_udp_port);
- addr.sin_addr.s_addr=INADDR_ANY;
- if(bind(net->l_udp_fd,(struct sockaddr *)&addr,sizeof(struct sockaddr))==-1) {
- /* try harder ... */
- true=1;
- if(setsockopt(net->l_udp_fd,SOL_SOCKET,SO_REUSEADDR,
- &true,sizeof(true))==-1) {
- perror("[network] setsockopt call (udp)");
- return N_ERROR;
- }
- puts("[network] reused address (udp)");
- }
-
- printf("[network] listening on port %d (udp)\n",net->l_udp_port);
-
- if((net->s_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
- perror("[network] socket call (udp-send)");
- return N_ERROR;
- }
-
- return N_SUCCESS;
-}
-
-int network_udp_receive(t_net *net,int channel, unsigned char *data,int count) {
-
- struct sockaddr_in addr;
- socklen_t len;
-
- if((count=recvfrom(net->l_udp_fd,data,count,0,
- (struct sockaddr *)&addr,&len))==-1) {
- perror("[network] recvfrom call");
- return N_ERROR;
- }
-
- if(strncmp(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS)) {
- printf("[network] packet from unknown: %s\n",inet_ntoa(addr.sin_addr));
- return N_UDP_WRONG_SENDER;
- }
-
- return N_SUCCESS;
-}
-
-int network_udp_send(t_net *net,int channel, unsigned char *data,int size) {
-
- int count,left;
- struct sockaddr_in addr;
-
- count=0;
- left=count;
-
- memset(&addr,0,sizeof(struct sockaddr));
- addr.sin_family=AF_INET;
- addr.sin_port=htons(net->l_udp_port);
- inet_aton(net->connection[channel].ip,&(addr.sin_addr));
-
- while(left) {
- if((count=sendto(net->s_udp_fd,data+size-left,left,0,
- (struct sockaddr *)&addr,sizeof(struct sockaddr)))==-1) {
- perror("[network] sendto call");
- return N_ERROR;
- }
- left-=count;
- }
-
- return N_SUCCESS;
-}
-
-int network_udp_shutdown(t_net *net) {
-
- if(close(net->l_udp_fd)==-1) {
- perror("[network] close call (udp-receive)");
- return N_ERROR;
- }
-
- if(close(net->s_udp_fd)==-1) {
- perror("[network] close call (udp-send)");
- return N_ERROR;
- }
-
- return N_SUCCESS;
-}
projects / my-code / ivac.git / commitdiff