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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
commit6e9c41a892ed0e0da326e0278b3221ce3f5713b8 (patch)
tree2e301d871bbeeb44aa57ff9cc070fcf3be484487 /sanei/sanei_udp.c
Initial import of sane-backends version 1.0.24-1.2
Diffstat (limited to 'sanei/sanei_udp.c')
-rw-r--r--sanei/sanei_udp.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/sanei/sanei_udp.c b/sanei/sanei_udp.c
new file mode 100644
index 0000000..ab316ea
--- /dev/null
+++ b/sanei/sanei_udp.c
@@ -0,0 +1,232 @@
+/* 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>
+#include <fcntl.h>
+
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#endif
+
+#define BACKEND_NAME sanei_udp
+
+#include "../include/sane/sane.h"
+#include "../include/sane/sanei_debug.h"
+#include "../include/sane/sanei_udp.h"
+
+static SANE_Status
+sanei_udp_socket(int *fdp, int broadcast)
+{
+ int fd;
+
+ if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+ return SANE_STATUS_INVAL;
+
+ if (broadcast) {
+ int opt = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
+ (char *) &opt, sizeof(opt)) < 0) {
+ close(fd);
+ return SANE_STATUS_INVAL;
+ }
+ }
+
+ *fdp = fd;
+
+ return SANE_STATUS_GOOD;
+}
+
+static SANE_Status
+sanei_udp_connect(int fd, const char *host, int port)
+{
+ int err;
+ struct sockaddr_in saddr;
+ struct hostent *h;
+
+ h = gethostbyname(host);
+
+ if (h == NULL || h->h_addr_list[0] == NULL
+ || h->h_addrtype != AF_INET)
+ 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) {
+ return SANE_STATUS_INVAL;
+ }
+
+ return SANE_STATUS_GOOD;
+}
+
+SANE_Status
+sanei_udp_open(const char *host, int port, int *fdp)
+{
+ int status;
+#ifdef HAVE_WINSOCK2_H
+ WSADATA wsaData;
+#endif
+
+ DBG_INIT();
+ DBG(1, "%s\n", __func__);
+
+#ifdef HAVE_WINSOCK2_H
+ status = WSAStartup(MAKEWORD(2, 2), &wsaData);
+ if (status != 0)
+ return SANE_STATUS_INVAL;
+#endif
+
+ status = sanei_udp_socket(fdp, 0);
+ if (status != SANE_STATUS_GOOD)
+ return status;
+
+ status = sanei_udp_connect(*fdp, host, port);
+ if (status != SANE_STATUS_GOOD) {
+ close(*fdp);
+ return status;
+ }
+
+ return status;
+}
+
+SANE_Status
+sanei_udp_open_broadcast(int *fdp)
+{
+ int status;
+
+ DBG_INIT();
+ DBG(1, "%s\n", __func__);
+
+ status = sanei_udp_socket(fdp, 1);
+ if (status != SANE_STATUS_GOOD)
+ return status;
+
+ return status;
+}
+
+void
+sanei_udp_close(int fd)
+{
+ close(fd);
+#ifdef HAVE_WINSOCK2_H
+ WSACleanup();
+#endif
+}
+
+ssize_t
+sanei_udp_write(int fd, const u_char * buf, int count)
+{
+ return send(fd, buf, count, 0);
+}
+
+ssize_t
+sanei_udp_write_broadcast(int fd, int port, const u_char * buf, int count)
+{
+ struct sockaddr_in saddr;
+
+ memset(&saddr, 0x00, sizeof(struct sockaddr_in));
+
+ saddr.sin_family = AF_INET;
+ saddr.sin_port = htons(port);
+ saddr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
+
+ return sendto(fd, buf, count, 0,
+ (struct sockaddr *)&saddr, sizeof(saddr));
+}
+
+void
+sanei_udp_set_nonblock(int fd, SANE_Bool nonblock)
+{
+#ifdef HAVE_WINSOCK2_H
+ u_long mode=nonblock;
+
+ ioctlsocket(fd, FIONBIO, &mode);
+#else
+ long flags;
+
+ flags = fcntl(fd, F_GETFL, 0L);
+ if (nonblock)
+ flags |= O_NONBLOCK;
+ else
+ flags &= ~O_NONBLOCK;
+ fcntl(fd, F_SETFL, flags);
+#endif
+}
+
+ssize_t
+sanei_udp_read(int fd, u_char * buf, int count)
+{
+ return recv(fd, buf, count, 0);
+}
+
+ssize_t
+sanei_udp_recvfrom(int fd, u_char * buf, int count, char **fromp)
+{
+ ssize_t l;
+ socklen_t fl;
+ struct sockaddr_in from;
+
+ fl = sizeof(from);
+
+ l = recvfrom(fd, buf, count, 0, (struct sockaddr *) &from, &fl);
+
+ if (l > 0 && fromp) {
+ *fromp = inet_ntoa(from.sin_addr);
+ }
+
+ return l;
+}
+