Annotation of src/usr.bin/ssh/msg.c, Revision 1.4.2.2
1.1 markus 1: /*
2: * Copyright (c) 2002 Markus Friedl. All rights reserved.
3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24: #include "includes.h"
1.4.2.2 ! brad 25: RCSID("$OpenBSD: msg.c,v 1.6 2003/06/28 16:23:06 deraadt Exp $");
1.1 markus 26:
27: #include "buffer.h"
28: #include "getput.h"
29: #include "log.h"
30: #include "atomicio.h"
31: #include "msg.h"
32:
33: void
1.4.2.1 margarid 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:
1.4.2.1 margarid 39: debug3("ssh_msg_send: type %u", (unsigned int)type & 0xff);
1.1 markus 40:
41: PUT_32BIT(buf, mlen + 1);
1.2 deraadt 42: buf[4] = type; /* 1st byte of payload is mesg-type */
1.4.2.2 ! brad 43: if (atomicio(vwrite, fd, buf, sizeof(buf)) != sizeof(buf))
1.4.2.1 margarid 44: fatal("ssh_msg_send: write");
1.4.2.2 ! brad 45: if (atomicio(vwrite, fd, buffer_ptr(m), mlen) != mlen)
1.4.2.1 margarid 46: fatal("ssh_msg_send: write");
1.1 markus 47: }
48:
49: int
1.4.2.1 margarid 50: ssh_msg_recv(int fd, Buffer *m)
1.1 markus 51: {
52: u_char buf[4];
53: ssize_t res;
54: u_int msg_len;
55:
1.4.2.1 margarid 56: debug3("ssh_msg_recv entering");
1.1 markus 57:
58: res = atomicio(read, fd, buf, sizeof(buf));
59: if (res != sizeof(buf)) {
60: if (res == 0)
61: return -1;
1.4.2.1 margarid 62: fatal("ssh_msg_recv: read: header %ld", (long)res);
1.1 markus 63: }
64: msg_len = GET_32BIT(buf);
65: if (msg_len > 256 * 1024)
1.4.2.1 margarid 66: fatal("ssh_msg_recv: read: bad msg_len %u", msg_len);
1.1 markus 67: buffer_clear(m);
68: buffer_append_space(m, msg_len);
69: res = atomicio(read, fd, buffer_ptr(m), msg_len);
70: if (res != msg_len)
1.4.2.1 margarid 71: fatal("ssh_msg_recv: read: %ld != msg_len", (long)res);
1.1 markus 72: return 0;
73: }