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/*
* Copyright © 2013 Benjamin Franzke
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "util.h"
#include "econproto.h"
#include "econpacket.h"
static int
connect_broadcast(const char *addr, int port)
{
int fd, ret;
struct sockaddr_in s;
int broadcast_enable = 1;
memset(&s, 0, sizeof s);
s.sin_family = AF_INET;
s.sin_port = htons(port);
s.sin_addr.s_addr = inet_addr(addr);
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd == -1)
return -1;
ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
&broadcast_enable, sizeof(broadcast_enable));
if (ret < 0) {
fprintf(stderr, "Failed to setsockopt broadcast: %s\n",
strerror(errno)),
close(fd);
return -1;
}
if (connect(fd, (struct sockaddr *) &s, sizeof s) < 0) {
fprintf(stderr, "Failed to connect: %s\n", strerror(errno));
close(fd);
return -1;
}
return fd;
}
int
main(int argc, char *argv[])
{
int cfd, sfd;
struct econ_packet pkt;
struct in_addr in;
const char *ip;
if (argc < 2)
exit(EXIT_FAILURE);
cfd = connect_broadcast(argv[1], ECON_PORTNUMBER);
if (cfd < 0)
exit(EXIT_FAILURE);
in.s_addr = sock_get_ipv4_addr(cfd);
ip = inet_ntoa(in);
fprintf(stderr, "own ip: %s\n", inet_ntoa(in));
sfd = bind_socket(SOCK_DGRAM, ip, STR(ECON_PORTNUMBER));
epkt_init(&pkt, E_CMD_EASYSEARCH);
if (epkt_send(cfd, &pkt) < 0)
exit(EXIT_FAILURE);
if (epkt_read(sfd, &pkt) < 0)
exit(EXIT_FAILURE);
if (pkt.hdr.commandID == E_CMD_CLIENTINFO) {
struct in_addr beamer;
beamer.s_addr = *(uint32_t*)pkt.hdr.IPaddress;
printf("%s", inet_ntoa(beamer));
if (pkt.hdr.datasize > 0) {
char *name = pkt.cmd.command.clientinfo.projName;
int state = pkt.cmd.command.clientinfo.projState;
name[ECON_PROJNAME_MAXLEN-1] = '\0';
printf(" - %s: %s", name,
state == E_PSTAT_NOUSE ? "no use" : "in use");
}
printf("\n");
}
return 0;
}
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