5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
21 #include "silcincludes.h"
23 /* Writes data from encrypted buffer to the socket connection. If the
24 data cannot be written at once, it will be written later with a timeout.
25 The data is written from the data section of the buffer, not from head
26 or tail section. This automatically pulls the data section towards end
27 after writing the data. */
29 int silc_socket_write(SilcSocketConnection sock)
32 SOCKET fd = sock->sock;
33 SilcBuffer src = sock->outbuf;
37 if (SILC_IS_DISABLED(sock))
40 SILC_LOG_DEBUG(("Writing data to socket %d", fd));
43 ret = send(fd, src->data, src->len, 0);
44 if (ret == SOCKET_ERROR) {
45 err = WSAGetLastError();
46 if (err == WSAEWOULDBLOCK) {
47 SILC_LOG_DEBUG(("Could not write immediately, will do it later"));
50 SILC_LOG_ERROR(("Cannot write to socket: %d", (int)fd));
51 sock->sock_error = err;
56 SILC_LOG_DEBUG(("Wrote data %d of %d bytes, will write rest later",
58 silc_buffer_pull(src, ret);
62 silc_buffer_pull(src, ret);
65 SILC_LOG_DEBUG(("Wrote data %d bytes", ret));
70 /* Reads data from the socket connection into the incoming data buffer.
71 It reads as much as possible from the socket connection. This returns
72 amount of bytes read or -1 on error or -2 on case where all of the
73 data could not be read at once. */
75 int silc_socket_read(SilcSocketConnection sock)
78 unsigned char buf[SILC_SOCKET_READ_SIZE];
79 SOCKET fd = sock->sock;
82 if (SILC_IS_DISABLED(sock))
85 SILC_LOG_DEBUG(("Reading data from socket %d", fd));
87 /* Check whether there is data available, without calling recv(). */
88 ioctlsocket(fd, FIONREAD, (unsigned long *)&argp);
90 /* Is this kludge or what? Without this thing this contraption
91 does not work at all!?. */
93 SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
97 /* Read the data from the socket. */
98 len = recv(fd, buf, sizeof(buf), 0);
99 if (len == SOCKET_ERROR) {
100 err = WSAGetLastError();
101 if (err == WSAEWOULDBLOCK || err == WSAEINTR) {
102 SILC_LOG_DEBUG(("Could not read immediately, will do it later"));
105 SILC_LOG_ERROR(("Cannot read from socket: %d", (int)fd));
106 sock->sock_error = err;
113 /* Insert the data to the buffer. */
116 sock->inbuf = silc_buffer_alloc(SILC_SOCKET_BUF_SIZE);
118 /* If the data does not fit to the buffer reallocate it */
119 if ((sock->inbuf->end - sock->inbuf->tail) < len)
120 sock->inbuf = silc_buffer_realloc(sock->inbuf, sock->inbuf->truelen +
122 silc_buffer_put_tail(sock->inbuf, buf, len);
123 silc_buffer_pull_tail(sock->inbuf, len);
125 SILC_LOG_DEBUG(("Read %d bytes", len));
130 /* Returns human readable socket error message */
132 SilcBool silc_socket_get_error(SilcSocketConnection sock, char *error,
133 SilcUInt32 error_len)