2 * Copyright (c) 1983, 1993
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33 * @(#)ctl_transact.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/talk/ctl_transact.c,v 1.5 1999/08/28 01:06:11 peter Exp $
35 * $DragonFly: src/usr.bin/talk/ctl_transact.c,v 1.2 2003/06/17 04:29:32 dillon Exp $
43 #define CTL_WAIT 2 /* time to wait for a response, in seconds */
46 * SOCKDGRAM is unreliable, so we must repeat messages if we have
47 * not recieved an acknowledgement within a reasonable amount
51 ctl_transact(target, msg, type, rp)
52 struct in_addr target;
57 fd_set read_mask, ctl_mask;
62 daemon_addr.sin_addr = target;
63 daemon_addr.sin_port = daemon_port;
65 FD_SET(ctl_sockt, &ctl_mask);
68 * Keep sending the message until a response of
69 * the proper type is obtained.
72 wait.tv_sec = CTL_WAIT;
74 /* resend message until a response is obtained */
76 cc = sendto(ctl_sockt, (char *)&msg, sizeof (msg), 0,
77 (struct sockaddr *)&daemon_addr,
78 sizeof (daemon_addr));
79 if (cc != sizeof (msg)) {
82 p_error("Error on write to talk daemon");
85 nready = select(32, &read_mask, 0, 0, &wait);
89 p_error("Error waiting for daemon response");
91 } while (nready == 0);
93 * Keep reading while there are queued messages
94 * (this is not necessary, it just saves extra
95 * request/acknowledgements being sent)
98 cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
102 p_error("Error on read from talk daemon");
104 read_mask = ctl_mask;
105 /* an immediate poll */
107 nready = select(32, &read_mask, 0, 0, &wait);
108 } while (nready > 0 && (rp->vers != TALK_VERSION ||
110 } while (rp->vers != TALK_VERSION || rp->type != type);
111 rp->id_num = ntohl(rp->id_num);
112 rp->addr.sa_family = ntohs(rp->addr.sa_family);