1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * Copyright (c) 2002 Markus Friedl. All rights reserved.
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
5*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
6*0Sstevel@tonic-gate * are met:
7*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
8*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
9*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
10*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
11*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
12*0Sstevel@tonic-gate *
13*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14*0Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15*0Sstevel@tonic-gate * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16*0Sstevel@tonic-gate * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17*0Sstevel@tonic-gate * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18*0Sstevel@tonic-gate * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19*0Sstevel@tonic-gate * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20*0Sstevel@tonic-gate * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21*0Sstevel@tonic-gate * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22*0Sstevel@tonic-gate * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23*0Sstevel@tonic-gate */
24*0Sstevel@tonic-gate #include "includes.h"
25*0Sstevel@tonic-gate RCSID("$OpenBSD: msg.c,v 1.4 2002/07/01 16:15:25 deraadt Exp $");
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include "buffer.h"
30*0Sstevel@tonic-gate #include "getput.h"
31*0Sstevel@tonic-gate #include "log.h"
32*0Sstevel@tonic-gate #include "atomicio.h"
33*0Sstevel@tonic-gate #include "msg.h"
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate void
ssh_msg_send(int fd,u_char type,Buffer * m)36*0Sstevel@tonic-gate ssh_msg_send(int fd, u_char type, Buffer *m)
37*0Sstevel@tonic-gate {
38*0Sstevel@tonic-gate u_char buf[5];
39*0Sstevel@tonic-gate u_int mlen = buffer_len(m);
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate debug3("ssh_msg_send: type %u", (unsigned int)type & 0xff);
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate PUT_32BIT(buf, mlen + 1);
44*0Sstevel@tonic-gate buf[4] = type; /* 1st byte of payload is mesg-type */
45*0Sstevel@tonic-gate if (atomicio(write, fd, buf, sizeof(buf)) != sizeof(buf))
46*0Sstevel@tonic-gate fatal("ssh_msg_send: write");
47*0Sstevel@tonic-gate if (atomicio(write, fd, buffer_ptr(m), mlen) != mlen)
48*0Sstevel@tonic-gate fatal("ssh_msg_send: write");
49*0Sstevel@tonic-gate }
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate int
ssh_msg_recv(int fd,Buffer * m)52*0Sstevel@tonic-gate ssh_msg_recv(int fd, Buffer *m)
53*0Sstevel@tonic-gate {
54*0Sstevel@tonic-gate u_char buf[4];
55*0Sstevel@tonic-gate ssize_t res;
56*0Sstevel@tonic-gate u_int msg_len;
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate debug3("ssh_msg_recv entering");
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate res = atomicio(read, fd, buf, sizeof(buf));
61*0Sstevel@tonic-gate if (res != sizeof(buf)) {
62*0Sstevel@tonic-gate if (res == 0)
63*0Sstevel@tonic-gate return -1;
64*0Sstevel@tonic-gate fatal("ssh_msg_recv: read: header %ld", (long)res);
65*0Sstevel@tonic-gate }
66*0Sstevel@tonic-gate msg_len = GET_32BIT(buf);
67*0Sstevel@tonic-gate if (msg_len > 256 * 1024)
68*0Sstevel@tonic-gate fatal("ssh_msg_recv: read: bad msg_len %u", msg_len);
69*0Sstevel@tonic-gate buffer_clear(m);
70*0Sstevel@tonic-gate buffer_append_space(m, msg_len);
71*0Sstevel@tonic-gate res = atomicio(read, fd, buffer_ptr(m), msg_len);
72*0Sstevel@tonic-gate if (res != msg_len)
73*0Sstevel@tonic-gate fatal("ssh_msg_recv: read: %ld != msg_len", (long)res);
74*0Sstevel@tonic-gate return 0;
75*0Sstevel@tonic-gate }
76