1 /* $OpenBSD: roaming_common.c,v 1.5 2009/06/27 09:32:43 andreas Exp $ */
3 * Copyright (c) 2004-2009 AppGate Network Security AB
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <sys/types.h>
21 #include <sys/socket.h>
25 #ifdef HAVE_INTTYPES_H
40 static size_t out_buf_size = 0;
41 static char *out_buf = NULL;
42 static size_t out_start;
43 static size_t out_last;
45 static u_int64_t write_bytes = 0;
46 static u_int64_t read_bytes = 0;
48 int roaming_enabled = 0;
49 int resume_in_progress = 0;
54 int fd = packet_get_connection_out();
55 int optval, optvallen;
57 optvallen = sizeof(optval);
58 if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &optval, &optvallen) != 0)
59 optval = DEFAULT_ROAMBUF;
66 int fd = packet_get_connection_in();
67 int optval, optvallen;
69 optvallen = sizeof(optval);
70 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &optval, &optvallen) != 0)
71 optval = DEFAULT_ROAMBUF;
76 set_out_buffer_size(size_t size)
79 * The buffer size can only be set once and the buffer will live
80 * as long as the session lives.
82 if (out_buf == NULL) {
84 out_buf = xmalloc(size);
97 add_recv_bytes(u_int64_t num)
109 roam_set_bytes(u_int64_t sent, u_int64_t recvd)
116 buf_append(const char *buf, size_t count)
118 if (count > out_buf_size) {
119 buf += count - out_buf_size;
120 count = out_buf_size;
122 if (count < out_buf_size - out_last) {
123 memcpy(out_buf + out_last, buf, count);
124 if (out_start > out_last)
129 size_t chunk = out_buf_size - out_last;
130 memcpy(out_buf + out_last, buf, chunk);
131 memcpy(out_buf, buf + chunk, count - chunk);
132 out_last = count - chunk;
133 out_start = out_last + 1;
138 roaming_write(int fd, const void *buf, size_t count, int *cont)
142 ret = write(fd, buf, count);
143 if (ret > 0 && !resume_in_progress) {
145 if (out_buf_size > 0)
146 buf_append(buf, ret);
148 debug3("Wrote %ld bytes for a total of %llu", (long)ret,
149 (unsigned long long)write_bytes);
154 roaming_read(int fd, void *buf, size_t count, int *cont)
156 ssize_t ret = read(fd, buf, count);
158 if (!resume_in_progress) {
166 roaming_atomicio(ssize_t(*f)(int, void*, size_t), int fd, void *buf,
169 size_t ret = atomicio(f, fd, buf, count);
171 if (f == vwrite && ret > 0 && !resume_in_progress) {
173 } else if (f == read && ret > 0 && !resume_in_progress) {
180 resend_bytes(int fd, u_int64_t *offset)
182 size_t available, needed;
184 if (out_start < out_last)
185 available = out_last - out_start;
187 available = out_buf_size;
188 needed = write_bytes - *offset;
189 debug3("resend_bytes: resend %lu bytes from %llu",
190 (unsigned long)needed, (unsigned long long)*offset);
191 if (needed > available)
192 fatal("Needed to resend more data than in the cache");
193 if (out_last < needed) {
194 int chunkend = needed - out_last;
195 atomicio(vwrite, fd, out_buf + out_buf_size - chunkend,
197 atomicio(vwrite, fd, out_buf, out_last);
199 atomicio(vwrite, fd, out_buf + (out_last - needed), needed);