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git.saurik.com Git - apple/network_cmds.git/blob - talk.tproj/look_up.c
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
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59 #include <sys/types.h>
60 #include <sys/socket.h>
61 #include <netinet/in.h>
62 #include <protocols/talkd.h>
68 * See if the local daemon has an invitation for us.
72 CTL_RESPONSE response
;
73 register CTL_RESPONSE
*rp
= &response
;
75 /* the rest of msg was set up in get_names */
77 /* copy new style sockaddr to old, swap family (short in old) */
78 msg
.ctl_addr
= *(struct osockaddr
*)&ctl_addr
;
79 msg
.ctl_addr
.sa_family
= htons(ctl_addr
.sin_family
);
81 msg
.ctl_addr
= *(struct sockaddr
*)&ctl_addr
;
83 /* must be initiating a talk */
84 if (!look_for_invite(rp
))
87 * There was an invitation waiting for us,
88 * so connect with the other (hopefully waiting) party
90 current_state
= "Waiting to connect with caller";
92 if (rp
->addr
.sa_family
!= AF_INET
)
93 p_error("Response uses invalid network address");
96 (struct sockaddr
*)&rp
->addr
, sizeof (rp
->addr
)) != -1)
98 } while (errno
== EINTR
);
99 if (errno
== ECONNREFUSED
) {
101 * The caller gave up, but his invitation somehow
102 * was not cleared. Clear it and initiate an
103 * invitation. (We know there are no newer invitations,
104 * the talkd works LIFO.)
106 ctl_transact(his_machine_addr
, msg
, DELETE
, rp
);
111 p_error("Unable to connect with initiator");
116 * Look for an invitation on 'machine'
121 struct in_addr machine_addr
;
123 current_state
= "Checking for invitation on caller's machine";
124 ctl_transact(his_machine_addr
, msg
, LOOK_UP
, rp
);
125 /* the switch is for later options, such as multiple invitations */
126 switch (rp
->answer
) {
129 msg
.id_num
= htonl(rp
->id_num
);
133 /* there wasn't an invitation waiting for us */