summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBenjamin Franzke <benjaminfranzke@googlemail.com>2013-03-12 08:58:46 +0100
committerBenjamin Franzke <benjaminfranzke@googlemail.com>2013-03-12 08:59:38 +0100
commit94b29432f28503be80a69fca09e54be7401a69be (patch)
treeec00a157263addad39941b5026d8e6511058e5b8
parent1b14cb2f65b3c4795b59ee8fabd5554f688ccc33 (diff)
downloadecon-94b29432f28503be80a69fca09e54be7401a69be.tar.gz
econ-94b29432f28503be80a69fca09e54be7401a69be.tar.bz2
econ-94b29432f28503be80a69fca09e54be7401a69be.zip
Add econfind which searches a beamer given a broadcast address
-rw-r--r--.gitignore1
-rw-r--r--Makefile4
-rw-r--r--econfind.c108
3 files changed, 111 insertions, 2 deletions
diff --git a/.gitignore b/.gitignore
index cf43a84..b6ee327 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
econproxy
econserv
+econfind
diff --git a/Makefile b/Makefile
index 48a76f2..0fb42f2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
CFLAGS=-std=gnu99 -ggdb -Wall -Wstrict-prototypes -Wmissing-prototypes -Wunused-result -Wextra -pedantic
-all: econproxy econserv
+all: econproxy econserv econfind
%: %.c util.c util.h econproto.h econpacket.h
gcc $(CFLAGS) -o $@ $< util.c econpacket.c
clean:
- rm -f econproxy econserv
+ rm -f econproxy econserv econfind
diff --git a/econfind.c b/econfind.c
new file mode 100644
index 0000000..b784404
--- /dev/null
+++ b/econfind.c
@@ -0,0 +1,108 @@
+/*
+ * 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)
+ exit(EXIT_FAILURE);
+
+
+ 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;
+}
+