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d0aeaf5a DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
f9ac90b4 KB |
3 | * All rights reserved. |
4 | * | |
cb956e54 | 5 | * %sccs.include.redist.c% |
d0aeaf5a DF |
6 | */ |
7 | ||
963ce42e | 8 | #ifndef lint |
a4e94754 | 9 | static char sccsid[] = "@(#)invite.c 5.8 (Berkeley) %G%"; |
f9ac90b4 | 10 | #endif /* not lint */ |
ec7915a9 | 11 | |
a4e94754 KB |
12 | #include <sys/types.h> |
13 | #include <sys/socket.h> | |
ec7915a9 MK |
14 | #include <sys/time.h> |
15 | #include <signal.h> | |
a4e94754 KB |
16 | #include <netinet/in.h> |
17 | #include <protocols/talkd.h> | |
18 | #include <errno.h> | |
ec7915a9 | 19 | #include <setjmp.h> |
a4e94754 KB |
20 | #include "talk_ctl.h" |
21 | #include "talk.h" | |
963ce42e MK |
22 | |
23 | /* | |
24 | * There wasn't an invitation waiting, so send a request containing | |
25 | * our sockt address to the remote talk daemon so it can invite | |
26 | * him | |
27 | */ | |
28 | ||
29 | /* | |
30 | * The msg.id's for the invitations | |
31 | * on the local and remote machines. | |
32 | * These are used to delete the | |
33 | * invitations. | |
34 | */ | |
35 | int local_id, remote_id; | |
36 | void re_invite(); | |
37 | jmp_buf invitebuf; | |
ec7915a9 MK |
38 | |
39 | invite_remote() | |
40 | { | |
963ce42e MK |
41 | int nfd, read_mask, template, new_sockt; |
42 | struct itimerval itimer; | |
43 | CTL_RESPONSE response; | |
44 | ||
45 | itimer.it_value.tv_sec = RING_WAIT; | |
46 | itimer.it_value.tv_usec = 0; | |
47 | itimer.it_interval = itimer.it_value; | |
48 | if (listen(sockt, 5) != 0) | |
49 | p_error("Error on attempt to listen for caller"); | |
7038e9c5 MK |
50 | #ifdef MSG_EOR |
51 | /* copy new style sockaddr to old, swap family (short in old) */ | |
52 | msg.addr = *(struct osockaddr *)&my_addr; /* XXX new to old style*/ | |
53 | msg.addr.sa_family = htons(my_addr.sin_family); | |
54 | #else | |
4fa2ac2d | 55 | msg.addr = *(struct sockaddr *)&my_addr; |
7038e9c5 | 56 | #endif |
4fa2ac2d | 57 | msg.id_num = htonl(-1); /* an impossible id_num */ |
963ce42e MK |
58 | invitation_waiting = 1; |
59 | announce_invite(); | |
ec7915a9 | 60 | /* |
963ce42e | 61 | * Shut off the automatic messages for a while, |
ec7915a9 MK |
62 | * so we can use the interupt timer to resend the invitation |
63 | */ | |
963ce42e MK |
64 | end_msgs(); |
65 | setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0); | |
66 | message("Waiting for your party to respond"); | |
67 | signal(SIGALRM, re_invite); | |
68 | (void) setjmp(invitebuf); | |
69 | while ((new_sockt = accept(sockt, 0, 0)) < 0) { | |
70 | if (errno == EINTR) | |
71 | continue; | |
72 | p_error("Unable to connect with your party"); | |
ec7915a9 | 73 | } |
963ce42e MK |
74 | close(sockt); |
75 | sockt = new_sockt; | |
ec7915a9 | 76 | |
963ce42e MK |
77 | /* |
78 | * Have the daemons delete the invitations now that we | |
79 | * have connected. | |
ec7915a9 | 80 | */ |
963ce42e MK |
81 | current_state = "Waiting for your party to respond"; |
82 | start_msgs(); | |
83 | ||
4fa2ac2d | 84 | msg.id_num = htonl(local_id); |
963ce42e | 85 | ctl_transact(my_machine_addr, msg, DELETE, &response); |
4fa2ac2d | 86 | msg.id_num = htonl(remote_id); |
963ce42e MK |
87 | ctl_transact(his_machine_addr, msg, DELETE, &response); |
88 | invitation_waiting = 0; | |
ec7915a9 MK |
89 | } |
90 | ||
963ce42e MK |
91 | /* |
92 | * Routine called on interupt to re-invite the callee | |
93 | */ | |
94 | void | |
95 | re_invite() | |
ec7915a9 | 96 | { |
963ce42e MK |
97 | |
98 | message("Ringing your party again"); | |
99 | current_line++; | |
ec7915a9 | 100 | /* force a re-announce */ |
4fa2ac2d | 101 | msg.id_num = htonl(remote_id + 1); |
963ce42e MK |
102 | announce_invite(); |
103 | longjmp(invitebuf, 1); | |
ec7915a9 MK |
104 | } |
105 | ||
4fa2ac2d | 106 | static char *answers[] = { |
665b6bbc | 107 | "answer #0", /* SUCCESS */ |
4fa2ac2d | 108 | "Your party is not logged on", /* NOT_HERE */ |
4fa2ac2d | 109 | "Target machine is too confused to talk to us", /* FAILED */ |
665b6bbc | 110 | "Target machine does not recognize us", /* MACHINE_UNKNOWN */ |
4fa2ac2d | 111 | "Your party is refusing messages", /* PERMISSION_REFUSED */ |
665b6bbc | 112 | "Target machine can not handle remote talk", /* UNKNOWN_REQUEST */ |
4fa2ac2d KM |
113 | "Target machine indicates protocol mismatch", /* BADVERSION */ |
114 | "Target machine indicates protocol botch (addr)",/* BADADDR */ | |
115 | "Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */ | |
116 | }; | |
117 | #define NANSWERS (sizeof (answers) / sizeof (answers[0])) | |
118 | ||
963ce42e MK |
119 | /* |
120 | * Transmit the invitation and process the response | |
121 | */ | |
ec7915a9 MK |
122 | announce_invite() |
123 | { | |
963ce42e MK |
124 | CTL_RESPONSE response; |
125 | ||
126 | current_state = "Trying to connect to your party's talk daemon"; | |
127 | ctl_transact(his_machine_addr, msg, ANNOUNCE, &response); | |
128 | remote_id = response.id_num; | |
129 | if (response.answer != SUCCESS) { | |
4fa2ac2d KM |
130 | if (response.answer < NANSWERS) |
131 | message(answers[response.answer]); | |
963ce42e | 132 | quit(); |
ec7915a9 | 133 | } |
ec7915a9 | 134 | /* leave the actual invitation on my talk daemon */ |
963ce42e MK |
135 | ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response); |
136 | local_id = response.id_num; | |
ec7915a9 | 137 | } |
4fa2ac2d | 138 | |
963ce42e MK |
139 | /* |
140 | * Tell the daemon to remove your invitation | |
141 | */ | |
ec7915a9 MK |
142 | send_delete() |
143 | { | |
963ce42e MK |
144 | |
145 | msg.type = DELETE; | |
146 | /* | |
147 | * This is just a extra clean up, so just send it | |
148 | * and don't wait for an answer | |
149 | */ | |
4fa2ac2d | 150 | msg.id_num = htonl(remote_id); |
963ce42e | 151 | daemon_addr.sin_addr = his_machine_addr; |
a4e94754 KB |
152 | if (sendto(ctl_sockt, &msg, sizeof (msg), 0, |
153 | (struct sockaddr *)&daemon_addr, | |
4fa2ac2d KM |
154 | sizeof (daemon_addr)) != sizeof(msg)) |
155 | perror("send_delete (remote)"); | |
156 | msg.id_num = htonl(local_id); | |
963ce42e | 157 | daemon_addr.sin_addr = my_machine_addr; |
a4e94754 KB |
158 | if (sendto(ctl_sockt, &msg, sizeof (msg), 0, |
159 | (struct sockaddr *)&daemon_addr, | |
4fa2ac2d KM |
160 | sizeof (daemon_addr)) != sizeof (msg)) |
161 | perror("send_delete (local)"); | |
ec7915a9 | 162 | } |