diff options
Diffstat (limited to 'sanei/sanei_tcp.c')
| -rw-r--r-- | sanei/sanei_tcp.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/sanei/sanei_tcp.c b/sanei/sanei_tcp.c new file mode 100644 index 0000000..a57d7c7 --- /dev/null +++ b/sanei/sanei_tcp.c @@ -0,0 +1,136 @@ +/* sane - Scanner Access Now Easy. + Copyright (C) 2006 Tower Technologies + Author: Alessandro Zummo <a.zummo@towertech.it> + This file is part of the SANE package. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. + + As a special exception, the authors of SANE give permission for + additional uses of the libraries contained in this release of SANE. + + The exception is that, if you link a SANE library with other files + to produce an executable, this does not by itself cause the + resulting executable to be covered by the GNU General Public + License. Your use of that executable is in no way restricted on + account of linking the SANE library code into it. + + This exception does not, however, invalidate any other reasons why + the executable file might be covered by the GNU General Public + License. + + If you submit changes to SANE to the maintainers to be included in + a subsequent release, you agree by submitting the changes that + those changes may be distributed with this exception intact. + + If you write modifications of your own for SANE, it is your choice + whether to permit this exception to apply to your modifications. + If you do not wish that, delete this exception notice. */ + +#include "../include/sane/config.h" + +#include <errno.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +#ifdef HAVE_WINSOCK2_H +#include <winsock2.h> +#endif +#ifdef HAVE_SYS_SOCKET_H +#include <sys/socket.h> +#endif + +#define BACKEND_NAME sanei_tcp + +#include "../include/sane/sane.h" +#include "../include/sane/sanei_debug.h" +#include "../include/sane/sanei_tcp.h" + +SANE_Status +sanei_tcp_open(const char *host, int port, int *fdp) +{ + int fd, err; + struct sockaddr_in saddr; + struct hostent *h; +#ifdef HAVE_WINSOCK2_H + WSADATA wsaData; +#endif + + DBG_INIT(); + DBG(1, "%s: host = %s, port = %d\n", __FUNCTION__, host, port); + +#ifdef HAVE_WINSOCK2_H + err = WSAStartup(MAKEWORD(2, 2), &wsaData); + if (err != 0) + return SANE_STATUS_INVAL; +#endif + + h = gethostbyname(host); + + if (h == NULL || h->h_addr_list[0] == NULL + || h->h_addrtype != AF_INET) + return SANE_STATUS_INVAL; + + if ((fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) + return SANE_STATUS_INVAL; + + memset(&saddr, 0x00, sizeof(struct sockaddr_in)); + + saddr.sin_family = AF_INET; + saddr.sin_port = htons(port); + memcpy(&saddr.sin_addr, h->h_addr_list[0], h->h_length); + + if ((err = + connect(fd, (struct sockaddr *) &saddr, + sizeof(struct sockaddr_in))) != 0) { + close(fd); + return SANE_STATUS_INVAL; + } + + *fdp = fd; + + return SANE_STATUS_GOOD; +} + +void +sanei_tcp_close(int fd) +{ + close(fd); +#ifdef HAVE_WINSOCK2_H + WSACleanup(); +#endif +} + +ssize_t +sanei_tcp_write(int fd, const u_char * buf, int count) +{ + return send(fd, buf, count, 0); +} + +ssize_t +sanei_tcp_read(int fd, u_char * buf, int count) +{ + ssize_t bytes_recv = 0, rc = 1; + + while (bytes_recv < count && rc > 0) + { + rc = recv(fd, buf+bytes_recv, count-bytes_recv, 0); + if (rc > 0) + bytes_recv += rc; + + } + return bytes_recv; +} |