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c6cc90b465
[roaming_common.c] delete with extreme prejudice a debug() that fired with every keypress; ok dtucker deraadt
245 lines
5.4 KiB
C
245 lines
5.4 KiB
C
/* $OpenBSD: roaming_common.c,v 1.8 2010/01/12 00:59:29 djm Exp $ */
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/*
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* Copyright (c) 2004-2009 AppGate Network Security AB
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "includes.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <errno.h>
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include "atomicio.h"
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#include "log.h"
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#include "packet.h"
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#include "xmalloc.h"
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#include "cipher.h"
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#include "buffer.h"
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#include "roaming.h"
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static size_t out_buf_size = 0;
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static char *out_buf = NULL;
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static size_t out_start;
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static size_t out_last;
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static u_int64_t write_bytes = 0;
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static u_int64_t read_bytes = 0;
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int roaming_enabled = 0;
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int resume_in_progress = 0;
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int
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get_snd_buf_size()
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{
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int fd = packet_get_connection_out();
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int optval;
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socklen_t optvallen = sizeof(optval);
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if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &optval, &optvallen) != 0)
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optval = DEFAULT_ROAMBUF;
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return optval;
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}
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int
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get_recv_buf_size()
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{
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int fd = packet_get_connection_in();
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int optval;
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socklen_t optvallen = sizeof(optval);
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if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &optval, &optvallen) != 0)
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optval = DEFAULT_ROAMBUF;
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return optval;
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}
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void
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set_out_buffer_size(size_t size)
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{
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/*
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* The buffer size can only be set once and the buffer will live
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* as long as the session lives.
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*/
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if (out_buf == NULL) {
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out_buf_size = size;
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out_buf = xmalloc(size);
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out_start = 0;
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out_last = 0;
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}
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}
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u_int64_t
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get_recv_bytes(void)
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{
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return read_bytes;
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}
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void
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add_recv_bytes(u_int64_t num)
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{
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read_bytes += num;
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}
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u_int64_t
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get_sent_bytes(void)
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{
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return write_bytes;
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}
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void
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roam_set_bytes(u_int64_t sent, u_int64_t recvd)
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{
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read_bytes = recvd;
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write_bytes = sent;
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}
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static void
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buf_append(const char *buf, size_t count)
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{
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if (count > out_buf_size) {
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buf += count - out_buf_size;
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count = out_buf_size;
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}
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if (count < out_buf_size - out_last) {
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memcpy(out_buf + out_last, buf, count);
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if (out_start > out_last)
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out_start += count;
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out_last += count;
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} else {
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/* data will wrap */
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size_t chunk = out_buf_size - out_last;
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memcpy(out_buf + out_last, buf, chunk);
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memcpy(out_buf, buf + chunk, count - chunk);
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out_last = count - chunk;
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out_start = out_last + 1;
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}
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}
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ssize_t
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roaming_write(int fd, const void *buf, size_t count, int *cont)
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{
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ssize_t ret;
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ret = write(fd, buf, count);
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if (ret > 0 && !resume_in_progress) {
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write_bytes += ret;
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if (out_buf_size > 0)
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buf_append(buf, ret);
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}
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if (out_buf_size > 0 &&
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(ret == 0 || (ret == -1 && errno == EPIPE))) {
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if (wait_for_roaming_reconnect() != 0) {
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ret = 0;
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*cont = 1;
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} else {
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ret = -1;
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errno = EAGAIN;
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}
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}
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return ret;
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}
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ssize_t
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roaming_read(int fd, void *buf, size_t count, int *cont)
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{
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ssize_t ret = read(fd, buf, count);
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if (ret > 0) {
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if (!resume_in_progress) {
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read_bytes += ret;
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}
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} else if (out_buf_size > 0 &&
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(ret == 0 || (ret == -1 && (errno == ECONNRESET
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|| errno == ECONNABORTED || errno == ETIMEDOUT
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|| errno == EHOSTUNREACH)))) {
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debug("roaming_read failed for %d ret=%ld errno=%d",
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fd, (long)ret, errno);
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ret = 0;
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if (wait_for_roaming_reconnect() == 0)
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*cont = 1;
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}
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return ret;
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}
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size_t
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roaming_atomicio(ssize_t(*f)(int, void*, size_t), int fd, void *buf,
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size_t count)
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{
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size_t ret = atomicio(f, fd, buf, count);
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if (f == vwrite && ret > 0 && !resume_in_progress) {
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write_bytes += ret;
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} else if (f == read && ret > 0 && !resume_in_progress) {
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read_bytes += ret;
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}
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return ret;
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}
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void
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resend_bytes(int fd, u_int64_t *offset)
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{
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size_t available, needed;
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if (out_start < out_last)
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available = out_last - out_start;
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else
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available = out_buf_size;
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needed = write_bytes - *offset;
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debug3("resend_bytes: resend %lu bytes from %llu",
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(unsigned long)needed, (unsigned long long)*offset);
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if (needed > available)
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fatal("Needed to resend more data than in the cache");
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if (out_last < needed) {
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int chunkend = needed - out_last;
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atomicio(vwrite, fd, out_buf + out_buf_size - chunkend,
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chunkend);
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atomicio(vwrite, fd, out_buf, out_last);
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} else {
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atomicio(vwrite, fd, out_buf + (out_last - needed), needed);
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}
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}
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/*
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* Caclulate a new key after a reconnect
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*/
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void
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calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge)
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{
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const EVP_MD *md = EVP_sha1();
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EVP_MD_CTX ctx;
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char hash[EVP_MAX_MD_SIZE];
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Buffer b;
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buffer_init(&b);
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buffer_put_int64(&b, *key);
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buffer_put_int64(&b, cookie);
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buffer_put_int64(&b, challenge);
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EVP_DigestInit(&ctx, md);
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EVP_DigestUpdate(&ctx, buffer_ptr(&b), buffer_len(&b));
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EVP_DigestFinal(&ctx, hash, NULL);
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buffer_clear(&b);
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buffer_append(&b, hash, EVP_MD_size(md));
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*key = buffer_get_int64(&b);
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buffer_free(&b);
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}
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