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This commit is contained in:
Igor Socec 2017-01-11 17:30:13 +01:00
parent 61d4e2fc64
commit efc292af2c
17 changed files with 77 additions and 35 deletions
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109
moxerver/server.c Normal file
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#include <server.h>
#include <netinet/tcp.h> /* TCP_NODELAY */
#include <arpa/inet.h>
int server_setup(server_t *server, unsigned int port)
{
int opt;
char timestamp[TIMESTAMP_LEN];
/* set up server address information */
server->address.sin_family = AF_INET; /* use IPv4 address family */
server->address.sin_port = htons(port); /* set up port number (htons for network byte order) */
server->address.sin_addr.s_addr = INADDR_ANY; /* use local address */
/* create stream socket using TCP */
server->socket = socket(AF_INET, SOCK_STREAM, 0);
if (server->socket == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
LOG("socket created");
/* try to avoid "Address already in use" error */
opt = 1; /* true value for setsockopt option */
if (setsockopt(server->socket, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(int)) == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
/* turn off Nagle algorithm */
opt = 1; /* true value for setsockopt option */
if (setsockopt(server->socket, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(int)) == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
/* bind server address to a socket */
if (bind(server->socket, (struct sockaddr *) &server->address, sizeof(server->address)) == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
LOG("bind successful");
/* save server port number */
server->port = port;
LOG("assigned port %u", server->port); // ntohs(server->address.sin_port)
/* listen for a client connection, allow (max-1) connections in queue */
if (listen(server->socket, (SERVER_MAX_CONNECTIONS - 1)) == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
time2string(time(NULL), timestamp);
LOG("server is up @ %s", timestamp);
return 0;
}
void server_close(server_t *server)
{
char timestamp[TIMESTAMP_LEN];
/* force closing in case of error */
if (close(server->socket) == -1)
{
close(server->socket);
}
time2string(time(NULL), timestamp);
LOG("socket closed, server is down @ %s", timestamp);
}
int server_accept(server_t *server, client_t *accepted_client)
{
int namelen;
char timestamp[TIMESTAMP_LEN];
/* accept connection request */
namelen = sizeof(accepted_client->address);
accepted_client->socket = accept(server->socket, (struct sockaddr *) &accepted_client->address, (socklen_t *) &namelen);
if (accepted_client->socket == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
/* make the client socket non-blocking */
if (fcntl(accepted_client->socket, F_SETFL, O_NONBLOCK) == -1)
{
LOG("[@%d] error %d: %s", __LINE__, errno, strerror(errno));
return -errno;
}
/* get client IP address as a human readable string */
inet_ntop(accepted_client->address.sin_family,
&accepted_client->address.sin_addr.s_addr,
accepted_client->ip_string, INET_ADDRSTRLEN);
/* grab current time and store it as client's last activity*/
accepted_client->last_active = time(NULL);
/* print client information */
time2string(accepted_client->last_active, timestamp);
LOG("accepted client %s @ %s", accepted_client->ip_string, timestamp);
return 0;
}