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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 "client.h"
#include "../data_store.h"
#include "../player.h"
#include "../game.h"
/**
* 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 or -1 on error
*/
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);
}
freeaddrinfo(result);
if(tmp == NULL)
return -1;
return sock;
}
/**
* Parse received list of players and fill global player list
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_player_list(const msg_t *m)
{
assert(m != NULL);
data_store_t *ds = data_store();
uint32_t pos = 0;
ds->player_list.count = m->payload[pos++];
// read usernames from buffer
for(int i=0; i<ds->player_list.count; i++)
{
uint8_t namelen;
ds->player_list.players[i].player_id = m->payload[pos++];
namelen = m->payload[pos++];
assert(namelen <= MAX_PLAYER_NAME_LENGTH);
strncpy(ds->player_list.players[i].player_name, (const char*) m->payload+pos, namelen);
ds->player_list.players[i].player_name[namelen] = '\0';
pos += namelen;
}
return true;
}
/**
* Parse received hand and store it
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_deal_hand(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length == MAX_HAND_CARDS); // deal_cards packet have fixed size
data_store_t *ds = data_store();
for(int i=0; i<MAX_HAND_CARDS; i++)
ds->hand.cards[i] = m->payload[i];
return true;
}
/**
* Parse received index of a selected stack and store it
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_selected_stack(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length == 1);
data_store_t *ds = data_store();
ds->stack_index = m->payload[0];
assert(ds->stack_index <= NUM_TABLE_STACKS);
return true;
}
/**
* Parse received cards for initial stacks at beginning of game
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_initial_stacks(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length == NUM_TABLE_STACKS);
data_store_t *ds = data_store();
for(int i=0; i<NUM_TABLE_STACKS; i++)
ds->table_stacks.stacks[i].cards[0] = m->payload[i];
return true;
}
/**
* Parse received open cards of all players
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_selected_card_all(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length % 2 == 0); // payload: n times id+card
data_store_t *ds = data_store();
for(int i=0; i<m->hdr.payload_length; i+=2)
{
player_id_t pid = m->payload[i];
player_list_entry_t *ple = get_player_list_entry_by_player_id(&ds->player_list, pid);
ple->open_card = m->payload[i+1];
}
return true;
}
/**
* Parse received action for next round (whether new cards will be dealt ot the game is ending)
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_next_action(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length == 1);
data_store_t *ds = data_store();
ds->game_finished = m->payload[0];
return true;
}
/**
* Parse received hello answer from server with assigned player id
* @param[in] m Received message
* @return Indicates success
*/
bool client_parse_hello(const msg_t *m)
{
assert(m != NULL);
assert(m->hdr.payload_length == 1);
data_store_t *ds = data_store();
ds->own_player_id = m->payload[0];
return true;
}
/**
* Prepare hello message with client's nickname\n
* Payload format:\n
* [ nickname:strlen(nickname) ]
* @param[out] m Pointer to message that should be filled
*/
void client_prep_hello(msg_t *m)
{
data_store_t *ds = data_store();
uint8_t namelen = strlen(ds->nickname);
m->hdr.type = msg_type_hello_c;
memcpy(m->payload, ds->nickname, namelen);
m->hdr.payload_length = namelen;
}
/**
* Prepare message with selected card\n
* Payload format:\n
* [ selected_card:1 ]
* @param[out] m Pointer to message that should be filled
*/
void client_prep_selected_card(msg_t *m)
{
data_store_t *ds = data_store();
card c = ds->selected_card;
assert(c >= MIN_CARD && c <= MAX_CARD);
m->hdr.type = msg_type_selected_card;
m->payload[0] = c;
m->hdr.payload_length = 1;
}
/**
* Prepare message with selected stack\n
* Payload format:\n
* [ stack_index:1 ]
* @param[out] m Pointer to message that should be filled
*/
void client_prep_selected_stack(msg_t *m)
{
data_store_t *ds = data_store();
assert(ds->stack_index <= NUM_TABLE_STACKS);
m->hdr.type = msg_type_selected_stack_c;
m->payload[0] = ds->stack_index;
m->hdr.payload_length = 1;
}
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