Annotation of src/usr.bin/ssh/msg.c, Revision 1.11
1.11 ! djm 1: /* $OpenBSD: msg.c,v 1.10 2006/03/25 13:17:02 djm Exp $ */
1.1 markus 2: /*
3: * Copyright (c) 2002 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: */
25: #include "includes.h"
26:
27: #include "buffer.h"
28: #include "log.h"
29: #include "atomicio.h"
30: #include "msg.h"
1.11 ! djm 31: #include "misc.h"
1.1 markus 32:
1.7 djm 33: int
1.5 djm 34: ssh_msg_send(int fd, u_char type, Buffer *m)
1.1 markus 35: {
36: u_char buf[5];
37: u_int mlen = buffer_len(m);
38:
1.5 djm 39: debug3("ssh_msg_send: type %u", (unsigned int)type & 0xff);
1.1 markus 40:
1.11 ! djm 41: put_u32(buf, mlen + 1);
1.2 deraadt 42: buf[4] = type; /* 1st byte of payload is mesg-type */
1.7 djm 43: if (atomicio(vwrite, fd, buf, sizeof(buf)) != sizeof(buf)) {
44: error("ssh_msg_send: write");
45: return (-1);
46: }
47: if (atomicio(vwrite, fd, buffer_ptr(m), mlen) != mlen) {
48: error("ssh_msg_send: write");
49: return (-1);
50: }
51: return (0);
1.1 markus 52: }
53:
54: int
1.5 djm 55: ssh_msg_recv(int fd, Buffer *m)
1.1 markus 56: {
57: u_char buf[4];
58: u_int msg_len;
59:
1.5 djm 60: debug3("ssh_msg_recv entering");
1.1 markus 61:
1.8 avsm 62: if (atomicio(read, fd, buf, sizeof(buf)) != sizeof(buf)) {
63: if (errno != EPIPE)
64: error("ssh_msg_recv: read: header");
1.7 djm 65: return (-1);
1.1 markus 66: }
1.11 ! djm 67: msg_len = get_u32(buf);
1.7 djm 68: if (msg_len > 256 * 1024) {
69: error("ssh_msg_recv: read: bad msg_len %u", msg_len);
70: return (-1);
71: }
1.1 markus 72: buffer_clear(m);
73: buffer_append_space(m, msg_len);
1.8 avsm 74: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
75: error("ssh_msg_recv: read: %s", strerror(errno));
1.7 djm 76: return (-1);
77: }
78: return (0);
1.1 markus 79: }