/* Performs a bind(2) call based on the provided information. The host is optional
* (if it is not given, INADDR_ANY is assumed). The port is mandatory.
*/
int netcat_bind(int sock, nc_domain_t domain, const nc_host_t *addr, const nc_port_t *port)
{
struct sockaddr *my_addr;
unsigned int my_addr_len;
int ret;
prepare_sockaddr(domain, addr, port, &my_addr, &my_addr_len);
/* bind it to the specified address (can be INADDY_ANY) */
ret = bind(sock, my_addr, my_addr_len);
free(my_addr);
return ret;
}
/* Performs a connect(2) call based on the provided information. Host and port
* are both mandatory.
*/
int netcat_connect(int sock, nc_domain_t domain, const nc_host_t *addr, const nc_port_t *port)
{
struct sockaddr *rem_addr;
unsigned int rem_addr_len;
int ret;
assert(addr);
prepare_sockaddr(domain, addr, port, &rem_addr, &rem_addr_len);
ret = connect(sock, rem_addr, rem_addr_len);
free(rem_addr);
return ret;
}
int create_connection(uint32_t ip,uint16_t port)
{
int fd = socket(AF_INET,SOCK_STREAM,0);
if(fd < 0) {
xlog2("create_connection[%0X:%i]: socket: %s",ip,port,strerror(errno));
return -1;
}
int flags;
if (-1 == (flags = fcntl(fd, F_GETFL, 0))) flags = 0;
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
sockaddr_in addr = prepare_sockaddr(ip,port);
int ret = connect(fd,(struct sockaddr*)&addr,sizeof(addr));
if( ret < 0 && errno != EINPROGRESS) {
close(fd);
xlog2("connect[%0X:%i]: %s",ip,port,strerror(errno));
return -2;
}
return fd;
}
