| | 1 | /* $OpenBSD: msg.c,v 1.15 2006/08/03 03:34:42 deraadt Exp $ */ |
| | 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 | |
| | 26 | #include "includes.h" |
| | 27 | |
| | 28 | #include <sys/types.h> |
| | 29 | #include <sys/uio.h> |
| | 30 | |
| | 31 | #include <errno.h> |
| | 32 | #include <stdio.h> |
| | 33 | #include <string.h> |
| | 34 | #include <unistd.h> |
| | 35 | #include <stdarg.h> |
| | 36 | |
| | 37 | #include "buffer.h" |
| | 38 | #include "log.h" |
| | 39 | #include "atomicio.h" |
| | 40 | #include "msg.h" |
| | 41 | #include "misc.h" |
| | 42 | |
| | 43 | int |
| | 44 | ssh_msg_send(int fd, u_char type, Buffer *m) |
| | 45 | { |
| | 46 | u_char buf[5]; |
| | 47 | u_int mlen = buffer_len(m); |
| | 48 | |
| | 49 | debug3("ssh_msg_send: type %u", (unsigned int)type & 0xff); |
| | 50 | |
| | 51 | put_u32(buf, mlen + 1); |
| | 52 | buf[4] = type; /* 1st byte of payload is mesg-type */ |
| | 53 | if (atomicio(vwrite, fd, buf, sizeof(buf)) != sizeof(buf)) { |
| | 54 | error("ssh_msg_send: write"); |
| | 55 | return (-1); |
| | 56 | } |
| | 57 | if (atomicio(vwrite, fd, buffer_ptr(m), mlen) != mlen) { |
| | 58 | error("ssh_msg_send: write"); |
| | 59 | return (-1); |
| | 60 | } |
| | 61 | return (0); |
| | 62 | } |
| | 63 | |
| | 64 | int |
| | 65 | ssh_msg_recv(int fd, Buffer *m) |
| | 66 | { |
| | 67 | u_char buf[4]; |
| | 68 | u_int msg_len; |
| | 69 | |
| | 70 | debug3("ssh_msg_recv entering"); |
| | 71 | |
| | 72 | if (atomicio(read, fd, buf, sizeof(buf)) != sizeof(buf)) { |
| | 73 | if (errno != EPIPE) |
| | 74 | error("ssh_msg_recv: read: header"); |
| | 75 | return (-1); |
| | 76 | } |
| | 77 | msg_len = get_u32(buf); |
| | 78 | if (msg_len > 256 * 1024) { |
| | 79 | error("ssh_msg_recv: read: bad msg_len %u", msg_len); |
| | 80 | return (-1); |
| | 81 | } |
| | 82 | buffer_clear(m); |
| | 83 | buffer_append_space(m, msg_len); |
| | 84 | if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) { |
| | 85 | error("ssh_msg_recv: read: %s", strerror(errno)); |
| | 86 | return (-1); |
| | 87 | } |
| | 88 | return (0); |
| | 89 | } |
andersk / openssh.git / blame_incremental