2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
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8 * modification, are permitted provided that the following conditions
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32 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 static const char sccsid[] = "@(#)ctl_transact.c 8.1 (Berkeley) 6/6/93";
40 #include <arpa/inet.h>
48 #define CTL_WAIT 2 /* time to wait for a response, in seconds */
51 * SOCKDGRAM is unreliable, so we must repeat messages if we have
52 * not received an acknowledgement within a reasonable amount
56 ctl_transact(struct in_addr target, CTL_MSG lmsg, int type, CTL_RESPONSE *rp)
62 daemon_addr.sin_addr = target;
63 daemon_addr.sin_port = daemon_port;
64 pfd[0].fd = ctl_sockt;
65 pfd[0].events = POLLIN;
68 * Keep sending the message until a response of
69 * the proper type is obtained.
72 /* resend message until a response is obtained */
74 cc = sendto(ctl_sockt, (char *)&lmsg, sizeof (lmsg), 0,
75 (struct sockaddr *)&daemon_addr,
76 sizeof (daemon_addr));
77 if (cc != sizeof (lmsg)) {
80 p_error("Error on write to talk daemon");
82 nready = poll(pfd, 1, CTL_WAIT * 1000);
86 p_error("Error waiting for daemon response");
88 } while (nready == 0);
90 * Keep reading while there are queued messages
91 * (this is not necessary, it just saves extra
92 * request/acknowledgements being sent)
95 cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
99 p_error("Error on read from talk daemon");
101 nready = poll(pfd, 1, 0);
102 } while (nready > 0 && (rp->vers != TALK_VERSION ||
104 } while (rp->vers != TALK_VERSION || rp->type != type);
105 rp->id_num = ntohl(rp->id_num);
106 rp->addr.sa_family = ntohs(rp->addr.sa_family);