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author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2017-05-24 21:03:56 +0200 |
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committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2017-05-24 21:03:56 +0200 |
commit | 58912f68c2489bcee787599837447e0d64dfd61a (patch) | |
tree | dda50aadde35fe152da1a8d50769987ace0f1496 /backend/epsonds-net.c | |
parent | cfd27ef2ad8b005fd47ab41ef29b71d9e3d48201 (diff) |
New upstream version 1.0.27upstream/1.0.27
Diffstat (limited to 'backend/epsonds-net.c')
-rw-r--r-- | backend/epsonds-net.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/backend/epsonds-net.c b/backend/epsonds-net.c new file mode 100644 index 0000000..8ea236b --- /dev/null +++ b/backend/epsonds-net.c @@ -0,0 +1,278 @@ +/* + * epsonds-net.c - SANE library for Epson scanners. + * + * Copyright (C) 2006-2016 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" + +#ifdef HAVE_SYS_SELECT_H +#include <sys/select.h> +#endif + +#include "sane/sane.h" +#include "sane/saneopts.h" +#include "sane/sanei_tcp.h" +#include "sane/sanei_config.h" +#include "sane/sanei_backend.h" + +#include "epsonds.h" +#include "epsonds-net.h" + +#include "byteorder.h" + +#include "sane/sanei_debug.h" + +static int +epsonds_net_read_raw(epsonds_scanner *s, unsigned char *buf, ssize_t wanted, + SANE_Status *status) +{ + int ready, read = -1; + fd_set readable; + struct timeval tv; + + tv.tv_sec = 10; + tv.tv_usec = 0; + + FD_ZERO(&readable); + FD_SET(s->fd, &readable); + + ready = select(s->fd + 1, &readable, NULL, NULL, &tv); + if (ready > 0) { + read = sanei_tcp_read(s->fd, buf, wanted); + } else { + DBG(15, "%s: select failed: %d\n", __func__, ready); + } + + *status = SANE_STATUS_GOOD; + + if (read < wanted) { + *status = SANE_STATUS_IO_ERROR; + } + + return read; +} + +int +epsonds_net_read(epsonds_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 (wanted && 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 = epsonds_net_read_raw(s, header, 12, status); + if (size != 12) { + 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; + } + + // incoming payload size + size = be32atoh(&header[6]); + + DBG(23, "%s: wanted = %lu, available = %lu\n", __func__, + (u_long) wanted, (u_long) size); + + *status = SANE_STATUS_GOOD; + + if (size == wanted) { + + DBG(15, "%s: full read\n", __func__); + + if (size) { + read = epsonds_net_read_raw(s, buf, size, status); + } + + if (s->netbuf) { + free(s->netbuf); + s->netbuf = NULL; + s->netlen = 0; + } + + if (read < 0) { + return 0; + } + + } else if (wanted < size) { + + DBG(23, "%s: long tail\n", __func__); + + read = epsonds_net_read_raw(s, s->netbuf, size, status); + if (read != size) { + return 0; + } + + memcpy(buf, s->netbuf, wanted); + read = wanted; + + free(s->netbuf); + s->netbuf = NULL; + s->netlen = 0; + + } else { + + DBG(23, "%s: partial read\n", __func__); + + read = epsonds_net_read_raw(s, s->netbuf, size, status); + if (read != size) { + 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; +} + +SANE_Status +epsonds_net_request_read(epsonds_scanner *s, size_t len) +{ + SANE_Status status; + epsonds_net_write(s, 0x2000, NULL, 0, len, &status); + return status; +} + +int +epsonds_net_write(epsonds_scanner *s, unsigned int cmd, const unsigned char *buf, + size_t buf_size, size_t reply_len, SANE_Status *status) +{ + unsigned char *h1, *h2; + unsigned char *packet = malloc(12 + 8); + + /* XXX check allocation failure */ + + h1 = packet; // packet header + h2 = packet + 12; // data header + + 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", + __func__, 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; // packet type + h1[3] = cmd; // data type + + h1[4] = 0x00; + h1[5] = 0x0C; // data offset + + DBG(24, "H1[0]: %02x %02x %02x %02x\n", h1[0], h1[1], h1[2], h1[3]); + + // 0x20 passthru + // 0x21 job control + + if (buf_size) { + htobe32a(&h1[6], buf_size); + } + + if((cmd >> 8) == 0x20) { + + htobe32a(&h1[6], buf_size + 8); // data size (data header + payload) + + htobe32a(&h2[0], buf_size); // payload size + htobe32a(&h2[4], reply_len); // expected answer size + + 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)) { + + // send header + data header + sanei_tcp_write(s->fd, packet, 12 + 8); + + } else { + sanei_tcp_write(s->fd, packet, 12); + } + + // send payload + if (buf_size) + sanei_tcp_write(s->fd, buf, buf_size); + + free(packet); + + *status = SANE_STATUS_GOOD; + return buf_size; +} + +SANE_Status +epsonds_net_lock(struct epsonds_scanner *s) +{ + SANE_Status status; + unsigned char buf[7] = "\x01\xa0\x04\x00\x00\x01\x2c"; + + DBG(1, "%s\n", __func__); + + epsonds_net_write(s, 0x2100, buf, 7, 0, &status); + epsonds_net_read(s, buf, 1, &status); + + // buf[0] should be ACK, 0x06 + + return status; +} + +SANE_Status +epsonds_net_unlock(struct epsonds_scanner *s) +{ + SANE_Status status; + + DBG(1, "%s\n", __func__); + + epsonds_net_write(s, 0x2101, NULL, 0, 0, &status); +/* epsonds_net_read(s, buf, 1, &status); */ + return status; +} |