ref: dfec09c436a8a328fc97007cf2dc3cd5476cc748
dir: /sys/src/libventi/srvhello.c/
#include <u.h> #include <libc.h> #include <venti.h> int vtsrvhello(VtConn *z) { VtFcall tx, rx; Packet *p; if((p = vtrecv(z)) == nil) return -1; if(vtfcallunpack(&tx, p) < 0){ packetfree(p); return -1; } packetfree(p); if(tx.msgtype != VtThello){ vtfcallclear(&tx); werrstr("bad packet type %d; want Thello %d", tx.msgtype, VtThello); return -1; } if(tx.tag != 0){ vtfcallclear(&tx); werrstr("bad tag in hello"); return -1; } if(strcmp(tx.version, z->version) != 0){ vtfcallclear(&tx); werrstr("bad version in hello"); return -1; } vtfree(z->uid); z->uid = tx.uid; tx.uid = nil; vtfcallclear(&tx); memset(&rx, 0, sizeof rx); rx.msgtype = VtRhello; rx.tag = tx.tag; rx.sid = "anonymous"; if((p = vtfcallpack(&rx)) == nil) return -1; if(vtsend(z, p) < 0) return -1; return 0; }