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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"
/**
* Client side function; Send hello to server
* @param[in] sock Socket to use
* @param[in] username Username of player
*/
void client_hello(int sock, const char* username)
{
assert(username != NULL);
uint8_t* buf;
uint8_t namelen = strlen(username);
buf = malloc(namelen+2); // type + len + username
if(buf == NULL)
{
printf("client_hello: Out of memory\n");
exit(EXIT_FAILURE);
}
buf[NET_MSG_OFFSET_TYPE] = msg_type_hello;
buf[NET_MSG_OFFSET_PAYLOAD_LENGTH] = namelen;
memcpy(buf+NET_MSG_OFFSET_PAYLOAD, username, namelen);
send(sock, buf, namelen+2, 0);
free(buf);
}
/**
* Client side function; connects to specified host:port
* @param[in] host Hostname of server
* @param[in] port Port of server
* @return Socket with open connection to server
*/
int client_connect_server(const char* host, const char* port)
{
assert(host != NULL);
assert(port != NULL);
int status;
int sock;
struct addrinfo hints, *result, *tmp;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; // IPv4 or IPv6
hints.ai_socktype = SOCK_STREAM; // TCP socket
status = getaddrinfo(host, port, &hints, &result);
if(status != 0)
{
printf("getaddrinfo: %s\n", gai_strerror(status));
exit(EXIT_FAILURE);
}
// connect to first result in linked addrinfo list
for(tmp = result; tmp != NULL; tmp = tmp->ai_next)
{
// create socket
sock = socket(tmp->ai_family, tmp->ai_socktype, tmp->ai_protocol);
if(sock == -1)
continue;
// connect!
if(connect(sock, tmp->ai_addr, tmp->ai_addrlen) != -1)
break; // Success!
close(sock);
}
if(tmp == NULL)
{
printf("failed to connect\n");
exit(EXIT_FAILURE);
}
freeaddrinfo(result);
return sock;
}
player_list* client_recv_player_list(const uint8_t* payload, const uint8_t data_len)
{
assert(payload != NULL);
player_list* players;
uint32_t pos = 0;
players = create_playerlist();
if(players == NULL)
{
printf("client_recv_player_list: Out of memory\n");
exit(EXIT_FAILURE);
}
players->count = payload[pos++];
// read usernames from buffer
for(int i=0; i<players->count; i++)
{
uint8_t namelen = payload[pos++];
players->names[i] = malloc(namelen+1);
memcpy(players->names[i], payload+pos, namelen);
players->names[i][namelen] = '\0';
pos += namelen;
}
return players;
}
hand_t *client_recv_deal_cards(const uint8_t* payload, const uint8_t payload_len)
{
assert(payload != NULL);
hand_t *h = malloc(sizeof(hand_t));
assert(payload_len == MAX_HAND_CARDS); // deal_cards packet have fixed size
for(int i=0; i<MAX_HAND_CARDS; i++)
{
h->cards[i] = payload[i];
}
return h;
}
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