Initial import of sane-backends version 1.0.24-1.2

1 files changed, 229 insertions, 0 deletions

diff --git a/backend/epson2_net.c b/backend/epson2_net.c
new file mode 100644
index 0000000..c7b4873
--- /dev/null
+++ b/backend/epson2_net.c
@@ -0,0 +1,229 @@
+/*
+ * epson2_net.c - SANE library for Epson scanners.
+ *
+ * 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, version 2.
+ */
+
+#define DEBUG_DECLARE_ONLY
+
+#include "sane/config.h"
+
+#include "sane/sane.h"
+#include "sane/saneopts.h"
+#include "sane/sanei_tcp.h"
+#include "sane/sanei_config.h"
+#include "sane/sanei_backend.h"
+
+#include "epson2.h"
+#include "epson2_net.h"
+
+#include "byteorder.h"
+
+#include "sane/sanei_debug.h"
+
+int
+sanei_epson_net_read_raw(Epson_Scanner *s, unsigned char *buf, size_t wanted,
+		       SANE_Status * status)
+{
+	size_t size, read = 0;
+
+	*status = SANE_STATUS_GOOD;
+
+	while (read < wanted) {
+		size = sanei_tcp_read(s->fd, buf + read, wanted - read);
+
+		if (size == 0)
+			break;
+
+		read += size;
+	}
+
+	if (read < wanted)
+		*status = SANE_STATUS_IO_ERROR;
+
+	return read;
+}
+
+int
+sanei_epson_net_read(Epson_Scanner *s, unsigned char *buf, ssize_t wanted,
+		       SANE_Status * status)
+{
+	ssize_t size;
+	ssize_t read = 0;
+	unsigned char header[12];
+
+	/* read from buffer, if available */
+	if (s->netptr != s->netbuf) {
+		DBG(23, "reading %lu from buffer at %p, %lu available\n",
+			(u_long) wanted, s->netptr, (u_long) s->netlen);
+
+		memcpy(buf, s->netptr, wanted);
+		read = wanted;
+
+		s->netlen -= wanted;
+
+		if (s->netlen == 0) {
+			DBG(23, "%s: freeing %p\n", __func__, s->netbuf);
+			free(s->netbuf);
+			s->netbuf = s->netptr = NULL;
+			s->netlen = 0;
+		}
+
+		return read;
+	}
+
+	/* receive net header */
+	size = sanei_tcp_read(s->fd, header, 12);
+	if (size != 12) {
+		*status = SANE_STATUS_IO_ERROR;
+		return 0;
+	}
+
+	if (header[0] != 'I' || header[1] != 'S') {
+		DBG(1, "header mismatch: %02X %02x\n", header[0], header[1]);
+		*status = SANE_STATUS_IO_ERROR;
+		return 0;
+	}
+
+	size = be32atoh(&header[6]);
+
+	DBG(23, "%s: wanted = %lu, available = %lu\n", __FUNCTION__,
+		(u_long) wanted, (u_long) size);
+
+	*status = SANE_STATUS_GOOD;
+
+	if (size == wanted) {
+
+		DBG(15, "%s: full read\n", __func__);
+		read = sanei_tcp_read(s->fd, buf, size);
+
+		if (s->netbuf) {
+			free(s->netbuf);
+			s->netbuf = NULL;
+			s->netlen = 0;
+		}
+
+		if (read < 0) {
+			*status = SANE_STATUS_IO_ERROR;
+			return 0;
+		}
+		
+/*	} else if (wanted < size && s->netlen == size) { */
+	} else {
+		DBG(23, "%s: partial read\n", __func__);
+
+		read = sanei_tcp_read(s->fd, s->netbuf, size);
+		if (read != size) {
+			*status = SANE_STATUS_IO_ERROR;
+			return 0;
+		}
+
+		s->netlen = size - wanted;
+		s->netptr += wanted;
+		read = wanted;
+
+		DBG(23, "0,4 %02x %02x\n", s->netbuf[0], s->netbuf[4]);
+		DBG(23, "storing %lu to buffer at %p, next read at %p, %lu bytes left\n",
+			(u_long) size, s->netbuf, s->netptr, (u_long) s->netlen);
+
+		memcpy(buf, s->netbuf, wanted);
+	}
+
+	return read;
+}
+
+
+int
+sanei_epson_net_write(Epson_Scanner *s, unsigned int cmd, const unsigned char *buf,
+			size_t buf_size, size_t reply_len, SANE_Status *status)
+{
+	unsigned char *h1, *h2, *payload;
+	unsigned char *packet = malloc(12 + 8 + buf_size);
+
+	/* XXX check allocation failure */
+
+	h1 = packet;
+	h2 = packet + 12;
+	payload = packet + 12 + 8;
+
+	if (reply_len) {
+		s->netbuf = s->netptr = malloc(reply_len);
+		s->netlen = reply_len;
+		DBG(24, "allocated %lu bytes at %p\n",
+			(u_long) reply_len, s->netbuf);
+	}
+
+	DBG(24, "%s: cmd = %04x, buf = %p, buf_size = %lu, reply_len = %lu\n",
+		__FUNCTION__, cmd, buf, (u_long) buf_size, (u_long) reply_len);
+
+	memset(h1, 0x00, 12);
+	memset(h2, 0x00, 8);
+
+	h1[0] = 'I';
+	h1[1] = 'S';
+
+	h1[2] = cmd >> 8;
+	h1[3] = cmd;
+
+	h1[4] = 0x00;
+	h1[5] = 0x0C; /* Don't know what's that */
+
+	DBG(24, "H1[0]: %02x %02x %02x %02x\n", h1[0], h1[1], h1[2], h1[3]);
+
+	if((cmd >> 8) == 0x20) {
+		htobe32a(&h1[6], buf_size + 8);		
+
+		htobe32a(&h2[0], buf_size);
+		htobe32a(&h2[4], reply_len);
+
+		DBG(24, "H1[6]: %02x %02x %02x %02x (%lu)\n", h1[6], h1[7], h1[8], h1[9], (u_long) (buf_size + 8));
+		DBG(24, "H2[0]: %02x %02x %02x %02x (%lu)\n", h2[0], h2[1], h2[2], h2[3], (u_long) buf_size);
+		DBG(24, "H2[4]: %02x %02x %02x %02x (%lu)\n", h2[4], h2[5], h2[6], h2[7], (u_long) reply_len);
+	}
+
+	if ((cmd >> 8) == 0x20 && (buf_size || reply_len)) {
+		if (buf_size)
+			memcpy(payload, buf, buf_size);
+
+		sanei_tcp_write(s->fd, packet, 12 + 8 + buf_size);
+	}
+	else
+		sanei_tcp_write(s->fd, packet, 12);
+
+	free(packet);
+
+	*status = SANE_STATUS_GOOD;
+	return buf_size;
+}
+
+SANE_Status
+sanei_epson_net_lock(struct Epson_Scanner *s)
+{
+	SANE_Status status;
+	unsigned char buf[1];
+
+	DBG(1, "%s\n", __func__);
+
+	sanei_epson_net_write(s, 0x2100, NULL, 0, 0, &status);
+	sanei_epson_net_read(s, buf, 1, &status);
+	return status;
+}
+
+SANE_Status
+sanei_epson_net_unlock(struct Epson_Scanner *s)
+{
+	SANE_Status status;
+
+	DBG(1, "%s\n", __func__);
+
+	sanei_epson_net_write(s, 0x2101, NULL, 0, 0, &status);
+/*	sanei_epson_net_read(s, buf, 1, &status); */
+	return status;
+}