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Makefile
(235 B)
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Makefile.depend
(334 B)
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ctl.c
(3.88 KB)
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ctl_transact.c
(3.44 KB)
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display.c
(4.96 KB)
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get_addrs.c
(2.44 KB)
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get_iface.c
(2.86 KB)
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get_names.c
(3.43 KB)
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init_disp.c
(6.02 KB)
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invite.c
(5.78 KB)
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io.c
(4.72 KB)
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look_up.c
(3.65 KB)
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msgs.c
(2.5 KB)
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talk.1
(4.42 KB)
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talk.c
(2.75 KB)
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talk.h
(3.2 KB)
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talk_ctl.h
(1.91 KB)
Editing: look_up.c
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #ifndef lint static const char sccsid[] = "@(#)look_up.c 8.1 (Berkeley) 6/6/93"; #endif #include <sys/types.h> #include <sys/socket.h> #include <protocols/talkd.h> #include <errno.h> #include <string.h> #include <unistd.h> #include "talk_ctl.h" #include "talk.h" /* * See if the local daemon has an invitation for us. */ int check_local(void) { CTL_RESPONSE response; CTL_RESPONSE *rp = &response; struct sockaddr addr; /* the rest of msg was set up in get_names */ /* copy new style sockaddr to old, swap family (short in old) */ msg.ctl_addr = *(struct tsockaddr *)&ctl_addr; msg.ctl_addr.sa_family = htons(ctl_addr.sin_family); /* must be initiating a talk */ if (!look_for_invite(rp)) return (0); /* * There was an invitation waiting for us, * so connect with the other (hopefully waiting) party */ current_state = "Waiting to connect with caller"; do { if (rp->addr.sa_family != AF_INET) p_error("Response uses invalid network address"); (void)memcpy(&addr, &rp->addr.sa_family, sizeof(addr)); addr.sa_family = rp->addr.sa_family; addr.sa_len = sizeof(addr); errno = 0; if (connect(sockt, &addr, sizeof(addr)) != -1) return (1); } while (errno == EINTR); if (errno == ECONNREFUSED) { /* * The caller gave up, but his invitation somehow * was not cleared. Clear it and initiate an * invitation. (We know there are no newer invitations, * the talkd works LIFO.) */ ctl_transact(his_machine_addr, msg, DELETE, rp); close(sockt); open_sockt(); return (0); } p_error("Unable to connect with initiator"); /*NOTREACHED*/ return (0); } /* * Look for an invitation on 'machine' */ int look_for_invite(CTL_RESPONSE *rp) { current_state = "Checking for invitation on caller's machine"; ctl_transact(his_machine_addr, msg, LOOK_UP, rp); /* the switch is for later options, such as multiple invitations */ switch (rp->answer) { case SUCCESS: msg.id_num = htonl(rp->id_num); return (1); default: /* there wasn't an invitation waiting for us */ return (0); } }
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