Annotation of src/usr.bin/ssh/dispatch.c, Revision 1.26
1.26 ! dtucker 1: /* $OpenBSD: dispatch.c,v 1.25 2015/01/30 01:13:33 djm Exp $ */
1.1 markus 2: /*
3: * Copyright (c) 2000 Markus Friedl. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24: */
1.21 deraadt 25:
26: #include <sys/types.h>
1.20 stevesk 27:
28: #include <signal.h>
1.21 deraadt 29: #include <stdarg.h>
1.7 markus 30:
1.6 markus 31: #include "ssh1.h"
1.8 markus 32: #include "ssh2.h"
1.7 markus 33: #include "log.h"
1.1 markus 34: #include "dispatch.h"
35: #include "packet.h"
1.8 markus 36: #include "compat.h"
1.23 markus 37: #include "ssherr.h"
1.1 markus 38:
1.23 markus 39: int
40: dispatch_protocol_error(int type, u_int32_t seq, void *ctx)
41: {
42: struct ssh *ssh = active_state; /* XXX */
43: int r;
1.1 markus 44:
1.16 itojun 45: logit("dispatch_protocol_error: type %d seq %u", type, seq);
1.15 markus 46: if (!compat20)
47: fatal("protocol error");
1.23 markus 48: if ((r = sshpkt_start(ssh, SSH2_MSG_UNIMPLEMENTED)) != 0 ||
49: (r = sshpkt_put_u32(ssh, seq)) != 0 ||
1.25 djm 50: (r = sshpkt_send(ssh)) != 0 ||
51: (r = ssh_packet_write_wait(ssh)) != 0)
52: sshpkt_fatal(ssh, __func__, r);
1.23 markus 53: return 0;
1.15 markus 54: }
1.23 markus 55:
56: int
57: dispatch_protocol_ignore(int type, u_int32_t seq, void *ssh)
1.15 markus 58: {
1.16 itojun 59: logit("dispatch_protocol_ignore: type %d seq %u", type, seq);
1.23 markus 60: return 0;
1.1 markus 61: }
1.23 markus 62:
1.2 markus 63: void
1.23 markus 64: ssh_dispatch_init(struct ssh *ssh, dispatch_fn *dflt)
1.1 markus 65: {
1.15 markus 66: u_int i;
1.1 markus 67: for (i = 0; i < DISPATCH_MAX; i++)
1.23 markus 68: ssh->dispatch[i] = dflt;
1.15 markus 69: }
1.23 markus 70:
1.15 markus 71: void
1.23 markus 72: ssh_dispatch_range(struct ssh *ssh, u_int from, u_int to, dispatch_fn *fn)
1.15 markus 73: {
74: u_int i;
75:
76: for (i = from; i <= to; i++) {
77: if (i >= DISPATCH_MAX)
78: break;
1.23 markus 79: ssh->dispatch[i] = fn;
1.15 markus 80: }
1.1 markus 81: }
1.23 markus 82:
1.1 markus 83: void
1.23 markus 84: ssh_dispatch_set(struct ssh *ssh, int type, dispatch_fn *fn)
1.1 markus 85: {
1.23 markus 86: ssh->dispatch[type] = fn;
1.1 markus 87: }
1.23 markus 88:
89: int
90: ssh_dispatch_run(struct ssh *ssh, int mode, volatile sig_atomic_t *done,
91: void *ctxt)
92: {
93: int r;
94: u_char type;
95: u_int32_t seqnr;
96:
1.1 markus 97: for (;;) {
98: if (mode == DISPATCH_BLOCK) {
1.23 markus 99: r = ssh_packet_read_seqnr(ssh, &type, &seqnr);
100: if (r != 0)
101: return r;
1.1 markus 102: } else {
1.23 markus 103: r = ssh_packet_read_poll_seqnr(ssh, &type, &seqnr);
104: if (r != 0)
105: return r;
1.1 markus 106: if (type == SSH_MSG_NONE)
1.23 markus 107: return 0;
108: }
109: if (type > 0 && type < DISPATCH_MAX &&
110: ssh->dispatch[type] != NULL) {
111: if (ssh->dispatch_skip_packets) {
112: debug2("skipped packet (type %u)", type);
113: ssh->dispatch_skip_packets--;
114: continue;
115: }
116: /* XXX 'ssh' will replace 'ctxt' later */
117: r = (*ssh->dispatch[type])(type, seqnr, ctxt);
118: if (r != 0)
119: return r;
120: } else {
121: r = sshpkt_disconnect(ssh,
122: "protocol error: rcvd type %d", type);
123: if (r != 0)
124: return r;
125: return SSH_ERR_DISCONNECTED;
1.1 markus 126: }
127: if (done != NULL && *done)
1.23 markus 128: return 0;
1.1 markus 129: }
1.23 markus 130: }
131:
132: void
133: ssh_dispatch_run_fatal(struct ssh *ssh, int mode, volatile sig_atomic_t *done,
134: void *ctxt)
135: {
136: int r;
137:
1.24 djm 138: if ((r = ssh_dispatch_run(ssh, mode, done, ctxt)) != 0) {
139: switch (r) {
140: case SSH_ERR_CONN_CLOSED:
141: logit("Connection closed by %.200s",
142: ssh_remote_ipaddr(ssh));
143: cleanup_exit(255);
144: case SSH_ERR_CONN_TIMEOUT:
145: logit("Connection to %.200s timed out while "
146: "waiting to read", ssh_remote_ipaddr(ssh));
1.26 ! dtucker 147: cleanup_exit(255);
! 148: case SSH_ERR_DISCONNECTED:
! 149: logit("Disconnected from %.200s",
! 150: ssh_remote_ipaddr(ssh));
1.24 djm 151: cleanup_exit(255);
152: default:
153: fatal("%s: %s", __func__, ssh_err(r));
154: }
155: }
1.1 markus 156: }
![[BACK]](/icons/back.gif){kind=icon}
Return to dispatch.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh