int _server_init_socket(int port)
{
struct sockaddr_in sa;
int mastersock;
bzero(&sa, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = INADDR_ANY;
sa.sin_port=htons((u_short)port);
pthread_mutex_lock(&mutex_protoent);
mastersock = socket(PF_INET, SOCK_STREAM, resolveproto("TCP"));
pthread_mutex_unlock(&mutex_protoent);
if (mastersock < 0)
{
return ERR_SOCKET_CREATE;
}
if (bind(mastersock, (struct sockaddr *)&sa, sizeof(struct sockaddr_in)) <0)
{
return ERR_SOCKET_BIND;
}
if (listen(mastersock, 1) < 0)
{
return ERR_SOCKET_LISTEN;
}
return mastersock;
}
int _listen(int port)
{
struct sockaddr_in sa;
int val;
int sockfd;
val= 1;
bzero(&sa, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = INADDR_ANY;
sa.sin_port = htons((unsigned short) port);
sockfd = socket(PF_INET, SOCK_STREAM, resolveproto("TCP"));
if (sockfd < 0) {
perror("_listen");
return ERR_SOCKET_CREATE;
}
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof (val));
if (bind(sockfd, (struct sockaddr *)&sa,
sizeof(struct sockaddr_in)) < 0) {
perror("_listen");
return ERR_SOCKET_BIND;
}
if (listen(sockfd, 1) < 0) {
perror("_listen");
return ERR_SOCKET_LISTEN;
}
return sockfd;
}
int _connect(char *address, unsigned short port)
{
int sockfd = 0;
struct sockaddr_in sa;
struct hostent *he;
in_addr_t addr;
bzero(&sa, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (sa.sin_port == 0)
{
return -1;
}
/* Assume that an IP address is used. */
pthread_mutex_lock(&mutex_hostent);
addr = inet_addr(address);
if (addr == INADDR_NONE)
{
/* If it is not an IP address, assume it is a hostname. */
if ((he = gethostbyname(address)) == NULL)
{
close(sockfd);
pthread_mutex_unlock(&mutex_hostent);
return -1;
}
}
else
{
/* Continue the assumption that an IP address is used. */
if ((he = gethostbyaddr((char *) (&addr), sizeof(addr), AF_INET)) == NULL)
{
close(sockfd);
pthread_mutex_unlock(&mutex_hostent);
return -1;
}
memcpy(&sa.sin_addr, &addr, sizeof(addr));
}
memcpy(&sa.sin_addr, he->h_addr_list[0], he->h_length);
pthread_mutex_unlock(&mutex_hostent);
pthread_mutex_lock(&mutex_protoent);
sockfd = socket(PF_INET, SOCK_STREAM, resolveproto("tcp"));
pthread_mutex_unlock(&mutex_protoent);
if (sockfd == -1)
{
return sockfd;
}
if (connect(sockfd, (struct sockaddr *) &sa, sizeof(struct sockaddr_in)) <0)
return -1;
return sockfd;
}
int _connect(char *address, unsigned short port) {
int sockfd = -1;
struct sockaddr_in sa;
struct hostent *he;
in_addr_t addr;
bzero(&sa, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (sa.sin_port == 0) {
printf("Please specify port on which client listen for request\n");
return -1;
}
/* Assume that an IP address is used. */
addr = inet_addr(address);
if (addr == INADDR_NONE) {
/* If it is not an IP address, assume it is a hostname. */
if ((he = gethostbyname(address)) == NULL) {
close(sockfd);
printf("Please specify correct hostname of box where client running\n");
return -1;
}
} else {
/* Continue the assumption that an IP address is used. */
if ((he = gethostbyaddr((char *) (&addr), sizeof(addr),
AF_INET)) == NULL) {
close(sockfd);
printf("Please specify correct IP of box where client running\n");
return -1;
}
memcpy(&sa.sin_addr, &addr, sizeof(addr));
}
memcpy(&sa.sin_addr, he->h_addr_list[0], he->h_length);
sockfd = socket(PF_INET, SOCK_STREAM, resolveproto("tcp"));
if (sockfd == -1) {
printf("Can't create socket for connection to client\n");
return sockfd;
}
if (connect(sockfd, (struct sockaddr *) &sa,
sizeof(struct sockaddr_in)) == -1) {
printf("Can't connect to client socket\n");
return -1;
}
return sockfd;
}
int serverinit(const char *addr, const char *port, const char *proto)
{
struct sockaddr_in socketaddr;
int mastersock;
int trueval = 1;
struct hostent *hostinfo;
unsigned long ip;
socketaddr_init(&socketaddr);
if (NULL == addr) {
socketaddr.sin_addr.s_addr = INADDR_ANY;
} else {
if (scanaddr(addr, &ip, NULL) != 4) {
LFATAL("Invalid address : %s provided", addr);
return -1;
}
hostinfo = gethostbyaddr((char *) &ip, 4, AF_INET);
if (NULL == hostinfo) {
LFATAL("gethostbyaddr : %s failed", addr);
return -1;
}
socketaddr.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
}
socketaddr_service(&socketaddr, port, proto);
mastersock = socket(PF_INET, prototype(proto), resolveproto(proto));
if (mastersock < 0) {
LFATAL("couldn't create socket");
return -1;
}
if (bind
(mastersock, (struct sockaddr *) &socketaddr,
sizeof(socketaddr)) < 0) {
return -1;
}
setsockopt(mastersock, SOL_SOCKET, SO_REUSEADDR, &trueval,
sizeof(trueval));
if (prototype(proto) == SOCK_STREAM) {
if (listen(mastersock, 5) < 0) {
LFATAL("listen on port %d failed", socketaddr.sin_port);
return -1;
}
}
return mastersock;
}
int clientconnect(const char *host, const char *port, const char *proto)
{
struct sockaddr_in socketaddr;
int sockid;
socketaddr_init(&socketaddr);
socketaddr_service(&socketaddr, port, proto);
socketaddr_host(&socketaddr, host);
sockid = socket(PF_INET, prototype(proto), resolveproto(proto));
if (sockid < 0) {
LFATAL("clientconnect socket failed, %s", strerror(errno));
return -1;
}
if (connect
(sockid, (struct sockaddr *) &socketaddr,
sizeof(socketaddr)) < 0) {
LFATAL("clientconnect connect failed, %s", strerror(errno));
return -1;
}
return sockid;
}