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#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include "net.h"
#include "player.h"
#include "global.h"
/**
* Server side function; start server on specified port
* @param[in] port Port on which server should listen
* @return Listening socket
*/
int server_start(const char* port)
{
assert(port != NULL);
int status;
int serversock;
struct addrinfo hints, *result, *tmp;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; // IPv4 or IPv6
hints.ai_socktype = SOCK_STREAM; // TCP socket
hints.ai_flags = AI_PASSIVE; // wildcard IP
hints.ai_protocol = 0; // any protocol
status = getaddrinfo(NULL, port, &hints, &result);
if(status != 0)
{
printf("getaddrinfo: %s\n", gai_strerror(status));
exit(EXIT_FAILURE);
}
// iterate over linked addrinfo list and use first useable entry
for(tmp = result; tmp != NULL; tmp = tmp->ai_next)
{
int yes=1;
// create socket
serversock = socket(tmp->ai_family, tmp->ai_socktype, tmp->ai_protocol);
if(serversock == -1)
continue;
// try to reuse still open sockets in TIME_WAIT state
setsockopt(serversock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
// try to bind to address/port
if(bind(serversock, tmp->ai_addr, tmp->ai_addrlen) == 0)
break; // Success!
close(serversock);
}
if(tmp == NULL)
{
printf("failed to bind\n");
exit(EXIT_FAILURE);
}
freeaddrinfo(result);
// start listening
status = listen(serversock, 1);
if(status == -1)
{
printf("listen: %s\n", strerror(status));
exit(EXIT_FAILURE);
}
return serversock;
}
/**
* Server side function; accepts connections from clients
* @param[in] serversock Socket on which server is listening
* @param[out] client_socks Socket list in which to store open client connections
* @param[in] count Number of clients that should connect
*/
void server_get_players(int serversock, socket_list_t* client_socks, const uint8_t count)
{
int i;
assert(count < MAX_PLAYERS && count > 0);
// accept connections
for(i=0; i<count; i++)
{
struct sockaddr_storage addr;
socklen_t addrlen = sizeof(addr);
client_socks->sockets[i] = accept(serversock, (struct sockaddr*) &addr, &addrlen);
if(client_socks->sockets[i] == -1)
{
printf("accept: %s\n", strerror(client_socks->sockets[i]));
exit(EXIT_FAILURE);
}
//printf("new client connected: %s\n", inet_ntop(sock.ss_family, get_in_addr((struct sockaddr*)&sock), INET6_ADDRSTRLEN));
printf("new client connected (%d/%d)\n", i+1, count);
}
client_socks->count = count;
}
/**
* Server side function; receive hello message from client and read username
* @param[in] sock Socket to use
* @return Username of client
*/
char* server_recv_hello(const uint8_t* payload, const uint8_t payload_len)
{
assert(payload != NULL);
char* name;
name = malloc(payload_len+1);
if(name == NULL)
{
printf("sender_recv_hello: Out of memory\n");
exit(EXIT_FAILURE);
}
memcpy(name, payload, payload_len);
name[payload_len] = '\0';
return name;
}
card* server_recv_selected_card(const uint8_t* payload, const uint8_t payload_len)
{
assert(payload != NULL && payload_len == 1);
card* c = malloc(sizeof(card));
assert(c != NULL);
*c = payload[0];
return c;
}
uint8_t* server_recv_selected_stack(const uint8_t* payload, const uint8_t payload_len)
{
assert(payload != NULL && payload_len == 1);
uint8_t* index = malloc(sizeof(uint8_t));
assert(index != NULL);
*index = payload[0];
return index;
}
uint8_t server_send_start_game(uint8_t* payload, const uint8_t payload_len)
{
uint16_t pos = 0;
data_store* ds = datamodel();
player_list* players = &ds->players;
payload[pos++] = players->count;
// copy player_ids, length and nicknames to buffer
for(int i=0; i<players->count; i++)
{
pnoc_t* pl = &players->players[i];
payload[pos++] = pl->player_id;
uint8_t len = strlen(pl->player_name);
payload[pos++] = len;
memcpy(payload+pos, pl->player_name, len);
payload += len;
}
assert(pos <= payload_len);
return pos;
}
uint8_t server_send_selected_stack(uint8_t* payload, const uint8_t payload_len)
{
data_store* ds = datamodel();
payload[0] = ds->stack_index;
return 1;
}
uint8_t server_send_deal_cards(uint8_t* payload, const uint8_t payload_len, const void* param)
{
const hand_t* hand = (hand_t*) param;
for(int i=0; i<MAX_HAND_CARDS; i++)
payload[i] = hand->cards[i];
return MAX_HAND_CARDS;
}
uint8_t server_send_initial_stacks(uint8_t* payload, const uint8_t payload_len)
{
// TODO
}
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