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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
HIGHLY MODIFIED FROM THE ORIGINAL CODE
*/
#include <string>
#include <netdb.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>
#include "network.h"
uint16_t m_peer_id;
int sockfd = 0;
struct sockaddr_in server;
uint16_t seqnum_reliable[3];
uint16_t seqnum_split;
int Resolve(char *address, char *port, in_addr_t & ip)
{
int success;
struct addrinfo hints, *servinfo, *p;
bzero(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
success = getaddrinfo(address, port, &hints, &servinfo);
if (success != 0) {
printf("Resolve hostname: failed.\n");
return 1;
} else {
printf("Resolve hostname: success.\n");
}
for (p = servinfo; p != NULL; p = p->ai_next) {
if (((struct sockaddr_in *)p->ai_addr)->sin_addr.s_addr !=
INADDR_ANY) {
ip = ((struct sockaddr_in *)p->ai_addr)->
sin_addr.s_addr;
break;
}
}
return 0;
};
int CreateClient(char *address, char *port)
{
int success, i;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
printf("Error while creating socket!\n");
return 1;
}
struct timeval timeout;
timeout.tv_sec = 30;
timeout.tv_usec = 0;
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
bzero(&server, sizeof(server));
in_addr_t ip;
success = inet_pton(AF_INET, address, &ip);
printf("Address: %s\n", address);
if (success != 1) {
printf("Direct conversion: failed.\n");
success = Resolve(address, port, ip);
} else {
printf("Direct conversion: success.\n");
success = 0;
}
if (success != 0) {
printf("Unable to proccess address: %s\n", address);
return 2;
}
uint16_t iport;
sscanf(port, "%hd", &iport);
server.sin_addr.s_addr = ip;
server.sin_family = AF_INET;
server.sin_port = htons(iport);
connect(sockfd, (sockaddr *) & server, sizeof(server));
m_peer_id = PEER_ID_NONEXISTENT;
for (i = 0; i < CHANNEL_COUNT; i++) {
seqnum_reliable[i] = SEQNUM_INITIAL;
}
seqnum_split = SEQNUM_INITIAL;
return 0;
};
int Send(NetworkPacket & pkt)
{
int len_sent = send(sockfd, pkt.get_data(), pkt.get_size(), 0);
if (len_sent >= 1) {
return 0;
} else {
return 1;
}
};
int Recv(NetworkPacket & pkt)
{
int len;
char buf[512];
len = recv(sockfd, buf, 512, 0);
while (len == 0)
len = recv(sockfd, buf, 512, 0);
if (len < 0) {
printf("%04X\n", errno);
return 1;
}
bool success = pkt.set_data(buf, len);
if (!success)
return 2;
return 0;
};
int Create_Packet(NetworkPacket & pkt, uint8_t channel, bool reliable)
{
if (channel >= CHANNEL_COUNT)
return 1;
pkt << (uint32_t) PROTOCOL_ID << m_peer_id << channel;
if (!reliable)
return 0;
pkt << (uint8_t) TYPE_RELIABLE << seqnum_reliable[channel];
seqnum_reliable[channel]++;
return 0;
};
int Disconnect()
{
NetworkPacket pkt;
Create_Packet(pkt, 0, false);
pkt << (uint8_t) TYPE_CONTROL << (uint8_t) CONTROLTYPE_DISCO;
Send(pkt);
close(sockfd);
return 0;
};
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