1 #include <u.h>
2 #include <libc.h>
3 #include <venti.h>
4 
5 int
6 vtsrvhello(VtConn *z)
7 {
8 	VtFcall tx, rx;
9 	Packet *p;
10 
11 	if((p = vtrecv(z)) == nil){
12 		werrstr("unexpected eof on venti connection");
13 		return -1;
14 	}
15 
16 	if(vtfcallunpack(&tx, p) < 0){
17 		packetfree(p);
18 		return -1;
19 	}
20 	packetfree(p);
21 
22 	if(tx.type != VtThello){
23 		vtfcallclear(&tx);
24 		werrstr("bad packet type %d; want Thello %d", tx.type, VtThello);
25 		return -1;
26 	}
27 	if(tx.tag != 0){
28 		vtfcallclear(&tx);
29 		werrstr("bad tag in hello");
30 		return -1;
31 	}
32 	if(strcmp(tx.version, z->version) != 0){
33 		vtfcallclear(&tx);
34 		werrstr("bad version in hello");
35 		return -1;
36 	}
37 	vtfree(z->uid);
38 	z->uid = tx.uid;
39 	tx.uid = nil;
40 	vtfcallclear(&tx);
41 
42 	memset(&rx, 0, sizeof rx);
43 	rx.type = VtRhello;
44 	rx.tag = tx.tag;
45 	rx.sid = "anonymous";
46 	if((p = vtfcallpack(&rx)) == nil)
47 		return -1;
48 	if(vtsend(z, p) < 0)
49 		return -1;
50 
51 	return 0;
52 }