1 7e42d210 2004-04-21 devnull #include <u.h>
 2 7e42d210 2004-04-21 devnull #define NOPLAN9DEFINES
 3 7e42d210 2004-04-21 devnull #include <libc.h>
 4 7e42d210 2004-04-21 devnull #include <ip.h>
 5 7e42d210 2004-04-21 devnull 
 6 7e42d210 2004-04-21 devnull #include <sys/socket.h>
 7 7e42d210 2004-04-21 devnull #include <netinet/in.h>
 8 7e42d210 2004-04-21 devnull 
 9 7e42d210 2004-04-21 devnull long
10 7e42d210 2004-04-21 devnull udpread(int fd, Udphdr *hdr, void *buf, long n)
11 7e42d210 2004-04-21 devnull {
12 7e42d210 2004-04-21 devnull 	struct sockaddr_in sin;
13 7e42d210 2004-04-21 devnull 	socklen_t len;
14 7e42d210 2004-04-21 devnull 
15 7e42d210 2004-04-21 devnull 	len = sizeof sin;
16 857072dc 2005-05-07 devnull 	if(getsockname(fd, (struct sockaddr*)&sin, &len) < 0)
17 857072dc 2005-05-07 devnull 		return -1;
18 857072dc 2005-05-07 devnull 	if(len != sizeof sin){
19 857072dc 2005-05-07 devnull 		werrstr("getsockname acting weird");
20 857072dc 2005-05-07 devnull 		return -1;
21 857072dc 2005-05-07 devnull 	}
22 857072dc 2005-05-07 devnull 	memset(hdr, 0, sizeof *hdr);
23 857072dc 2005-05-07 devnull 	memmove(hdr->laddr, v4prefix, IPaddrlen);
24 0c9c620f 2010-03-10 rsc 	memmove(hdr->laddr+12, &sin.sin_addr, sizeof(u32int));
25 0c9c620f 2010-03-10 rsc 	memmove(hdr->lport, &sin.sin_port, sizeof(u16int));
26 857072dc 2005-05-07 devnull 
27 857072dc 2005-05-07 devnull 	len = sizeof sin;
28 7e42d210 2004-04-21 devnull 	n = recvfrom(fd, buf, n, 0, (struct sockaddr*)&sin, &len);
29 7e42d210 2004-04-21 devnull 	if(n < 0)
30 7e42d210 2004-04-21 devnull 		return -1;
31 7e42d210 2004-04-21 devnull 	if(len != sizeof sin){
32 7e42d210 2004-04-21 devnull 		werrstr("recvfrom acting weird");
33 7e42d210 2004-04-21 devnull 		return -1;
34 7e42d210 2004-04-21 devnull 	}
35 7e42d210 2004-04-21 devnull 	memmove(hdr->raddr, v4prefix, IPaddrlen);
36 0c9c620f 2010-03-10 rsc 	memmove(hdr->raddr+12, &sin.sin_addr, sizeof(u32int));
37 0c9c620f 2010-03-10 rsc 	memmove(hdr->rport, &sin.sin_port, sizeof(u16int));
38 857072dc 2005-05-07 devnull 
39 7e42d210 2004-04-21 devnull 	return n;
40 7e42d210 2004-04-21 devnull }
41 7e42d210 2004-04-21 devnull 
42 7e42d210 2004-04-21 devnull long
43 7e42d210 2004-04-21 devnull udpwrite(int fd, Udphdr *hdr, void *buf, long n)
44 7e42d210 2004-04-21 devnull {
45 7e42d210 2004-04-21 devnull 	struct sockaddr_in sin;
46 7e42d210 2004-04-21 devnull 
47 7e42d210 2004-04-21 devnull 	memset(&sin, 0, sizeof sin);
48 7e42d210 2004-04-21 devnull 	sin.sin_family = AF_INET;
49 96898a81 2010-03-10 rsc 	memmove(&sin.sin_addr, hdr->raddr+12, 4);
50 96898a81 2010-03-10 rsc 	memmove(&sin.sin_port, hdr->rport, 2);
51 7e42d210 2004-04-21 devnull 	return sendto(fd, buf, n, 0, (struct sockaddr*)&sin, sizeof sin);
52 7e42d210 2004-04-21 devnull }