From 976c801cbe9ae8d03cae529b57a10cbb588fd92a Mon Sep 17 00:00:00 2001
From: epochqwert <epoch@hacking.allowed.org>
Date: Sun, 28 Jun 2015 00:15:29 -0500
Subject: fixed up a lot of warnings. added watch.

---
 src/bin/great.c | 48 ++++++++++++++++--------------------------------
 1 file changed, 16 insertions(+), 32 deletions(-)

(limited to 'src/bin/great.c')

diff --git a/src/bin/great.c b/src/bin/great.c
index 11976b8..9a554fc 100644
--- a/src/bin/great.c
+++ b/src/bin/great.c
@@ -9,68 +9,52 @@
 #include <net/if.h>
 #include <net/if_gre.h>
 
-#define PORT 1013
-
 /*great = gre auto tunnel*/
 
-void dump(unsigned char *b,unsigned int t) {
- for(;t;b++,t--) printf("%02x ",*b);
-}
-
-/* TODO:
- args.
- password?
- clean out the extra shit.
- clean it up even more.
-
- arguments:
- interface
- listen-port
- listen-addr
- password?
-*/
 int main(int argc,char *argv[]) {
  struct sockaddr_in sa;
  struct sockaddr_in from;
- char buf[512];
+ char in;
  socklen_t sl=sizeof(struct sockaddr_in);
  int so_link=socket(AF_LINK,SOCK_DGRAM,0);
- int so_unspec=socket(AF_UNSPEC,SOCK_DGRAM,0);
  int so_inet=socket(AF_INET,SOCK_DGRAM,0);
  int so=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
  memset(&sa,0,(size_t)sizeof(struct sockaddr_in));
  memset(&from,0,(size_t)sizeof(struct sockaddr_in));
- sa.sin_addr.s_addr=inet_addr("192.168.0.2");
- sa.sin_port=htons(PORT);
+ if(argc < 4) {
+  printf("usage: %s interface address port",argv[0]);
+  printf("example: %s gre0 192.168.0.2 1013",argv[0]);
+  return 1;
+ }
+ sa.sin_addr.s_addr=inet_addr(argv[2]);
+ sa.sin_port=htons(atoi(argv[3]));
  sa.sin_family=PF_INET;
  bind(so,(struct sockaddr *)&sa,sizeof(sa));
- recvfrom(so,buf,sizeof(buf),0,(struct sockaddr *)&from,&sl);
- connect(so,(struct sockaddr *)&from,sl);
+ recvfrom(so,&in,1,0,(struct sockaddr *)&from,&sl);
  struct in_addr addr = {from.sin_addr.s_addr};
- printf("%s\n",inet_ntoa(addr));
+ printf("setting remote end to %s:%d\n",inet_ntoa(addr),ntohs(from.sin_port));
+ connect(so,(struct sockaddr *)&from,sl);
 
+//name this stuff better and test if it needs to be refilled each time.
  struct ifreq *asdf;
  asdf=malloc(sizeof(struct ifreq));
 
  memset(asdf,0,sizeof(struct ifreq));
- strcpy(asdf->ifr_name,"gre10");
+ strcpy(asdf->ifr_name,argv[1]);
  printf("destroy: %d\n",ioctl(so_link,SIOCIFDESTROY,asdf));//destroy
 
  memset(asdf,0,sizeof(struct ifreq));
- strcpy(asdf->ifr_name,"gre10");
+ strcpy(asdf->ifr_name,argv[1]);
  printf("create: %d\n",ioctl(so_link,SIOCIFCREATE,asdf));//create
 
  memset(asdf,0,sizeof(struct ifreq));
- strcpy(asdf->ifr_name,"gre10");
+ strcpy(asdf->ifr_name,argv[1]);
  asdf->ifr_flags=IPPROTO_UDP;
  printf("proto: %d\n",ioctl(so_link,GRESPROTO,asdf));//link0 link2
 
  memset(asdf,0,sizeof(struct ifreq));
- strcpy(asdf->ifr_name,"gre10");
+ strcpy(asdf->ifr_name,argv[1]);
  asdf->ifr_value=so;
  printf("gressock: %d\n",ioctl(so_inet,GRESSOCK,asdf));//set socket
-
- sleep(1);
- system("ifconfig gre10");//just so you can see what it looks like.
  return 0;
 }
-- 
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