Trying to get UDP working with announce.dial and friends.
Code for an attempted UDP server/client listed below.
The server does not get beyond the read() call -- as if the
client never got connected. Dial() in client does not return
error. Any pointers will bve appreciated.
-ishwar
-------server.c---
/* Example of a server, echoes back the
* info received from a client
* It does not complete the read()..
*/
#include <u.h>
#include <libc.h>
#include <ip.h>
void
main(void)
{
int afd, lcfd;
char adir[40], ldir[40];
int i, n;
char buf[256];
afd = announce("udp!*!8001", adir);
if(afd < 0) sysfatal("announce..\n");
if(fprint(afd, "headers") < 0)
fprint(2, "headers..\n");
sprint(ldir, "%s/data", adir);
lcfd = open(ldir, ORDWR);
if(lcfd < 0) {
close(afd); sysfatal("listen..\n");
}
n = read(lcfd, buf, 256);
if(n <=0) {
close(afd); close(lcfd); sysfatal("read..\n");
}
for(i = 0; i < 12; i++)
print("%x ", (uchar *)(buf+i));
print("\n");
close(afd); close(lcfd);
exits(nil);
}
--------client.c---
/* Client code for echo client..
*/
#include <u.h>
#include <libc.h>
void
main(void)
{
char buf[128], *string = "Message to server.";
int fd, len;
if((fd = dial("udp!localhost!8001", 0, 0, 0)) < 0)
sysfatal("dial");
print("after dial..\n");
srand((long)i);
sprint(buf, "%s%d", string, rand());
len = strlen(buf) + 1;
if(write(fd, buf, len) != len) {
close(fd); sysfatal("write..\n"); }
buf[0] = 0;
read(fd, buf, 128);
close(fd);
exits(nil);
}
--------
