commit f8ab6b7b487e0cb7eac2d91147ddfb52d44ea92d
parent 1344b9e81168da174412b408694978884a101954
Author: Christian Grothoff <christian@grothoff.org>
Date: Sun, 10 Nov 2019 23:18:29 +0100
prepare logic for generation of QR codes
Diffstat:
3 files changed, 140 insertions(+), 3 deletions(-)
diff --git a/configure.ac b/configure.ac
@@ -14,7 +14,7 @@ AC_PROG_CC
AC_CHECK_LIB([nfc], [nfc_open])
# Checks for header files.
-AC_CHECK_HEADERS([stdlib.h string.h unistd.h])
+AC_CHECK_HEADERS([stdlib.h string.h unistd.h sys/un.h netinet/in.h netinet/ip.h])
# Checks for typedefs, structures, and compiler characteristics.
AC_CHECK_HEADER_STDBOOL
@@ -72,6 +72,38 @@ AC_CHECK_FUNCS([strstr])
LIBS_SAVE=$LIBS
+# test for libqrencode
+qrencode=0
+QR_LIBS="-lqrencode"
+AC_MSG_CHECKING(for libqrencode)
+AC_ARG_WITH(qrencode,
+ [ --with-qrencode=PFX Base of libqrencode installation],
+ [AC_MSG_RESULT([$with_qrencode])
+ AS_CASE([$with_qrencode],
+ [no],[],
+ [yes],[
+ AC_CHECK_HEADERS(qrencode.h,qrencode=1)
+ ],
+ [
+ CPPFLAGS="-I$with_qrencode/include $CPPFLAGS"
+ QR_CFLAGS="-I$with_qrencode/include"
+ QR_LIBS="-L$with_qrencode/lib -lqrencode"
+ AC_CHECK_HEADERS(qrencode.h,qrencode=1)
+ ])
+ ],
+ [AC_MSG_RESULT([--with-qrencode not specified])
+ AC_CHECK_HEADERS(qrencode.h,qrencode=1)])
+
+AS_IF([test "$qrencode" != 1],
+[
+QR_LIBS=""
+QR_CFLAGS=""
+])
+
+AC_SUBST(QR_CFLAGS)
+AC_SUBST(QR_LIBS)
+
+
# Check for Taler's libtalermerchant
libtalermerchant=0
AC_MSG_CHECKING([for libtalermerchant])
@@ -248,3 +280,8 @@ LIBS=$LIBS_SAVE
AC_CONFIG_FILES([Makefile
src/Makefile])
AC_OUTPUT
+
+if test "$qrencode" != 1
+then
+ AC_MSG_WARN([taler-mdb will not include QR support])
+fi
diff --git a/src/Makefile.am b/src/Makefile.am
@@ -15,6 +15,7 @@ taler_nfc_LDADD = \
-lgnunetutil \
-ljansson \
-lnfc \
+ @QR_LIBS@ \
$(XLIB)
diff --git a/src/main.c b/src/main.c
@@ -22,16 +22,34 @@ along with
* @author BOSS Marco
* @author Christian Grothoff
*/
+#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <sys/socket.h>
+#if HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+#if HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if HAVE_NETINET_IP_H
+#include <netinet/ip.h> /* superset of previous */
+#endif
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
#include <termios.h>
#include <nfc/nfc.h>
-#include <gnunet/platform.h>
#include <gnunet/gnunet_util_lib.h>
#include <taler/taler_merchant_service.h>
+/**
+ * Disable i18n support.
+ */
+#define _(s) (s)
+
#define BACKEND_POLL_TIMEOUT GNUNET_TIME_UNIT_MINUTES
#define NFC_FAILURE_RETRY_FREQ GNUNET_TIME_UNIT_SECONDS
@@ -151,6 +169,85 @@ static struct Product products[] = {
};
+#if HAVE_QRENCODE_H
+#include <qrencode.h>
+
+/**
+ * Create the QR code image for our zone.
+ *
+ * @param uri what text to show in the QR code
+ */
+static void
+show_qrcode (const char *uri)
+{
+ QRinput *qri;
+ QRcode *qrc;
+ uint8_t *pixels;
+ unsigned int size;
+ char *upper;
+ const unsigned int scale = 3;
+ const unsigned int n_channels = 3;
+
+ qri = QRinput_new2 (0, QR_ECLEVEL_M);
+ if (NULL == qri)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "QRinput_new2");
+ return;
+ }
+ upper = GNUNET_strdup (uri);
+ GNUNET_STRINGS_utf8_toupper (uri, upper);
+ /* first try encoding as uppercase-only alpha-numerical
+ QR code (much smaller encoding); if that fails, also
+ try using binary encoding (in case nick contains
+ special characters). */
+ if ((0 !=
+ QRinput_append (qri,
+ QR_MODE_AN,
+ strlen (upper),
+ (unsigned char *) upper)) &&
+ (0 !=
+ QRinput_append (qri,
+ QR_MODE_8,
+ strlen (upper),
+ (unsigned char *) upper)))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "QRinput_append");
+ GNUNET_free (upper);
+ return;
+ }
+ GNUNET_free (upper);
+ qrc = QRcode_encodeInput (qri);
+ if (NULL == qrc)
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
+ "QRcode_encodeInput");
+ QRinput_free (qri);
+ return;
+ }
+ size = qrc->width * scale;
+ size += 8 - (size % 8);
+ pixels = GNUNET_malloc (size * size * n_channels);
+ for (unsigned int x = 0; x < size; x++)
+ for (unsigned int y = 0; y < size; y++)
+ {
+ unsigned int off =
+ (x * qrc->width / size) + (y * qrc->width / size) * qrc->width;
+ for (int c = 0; c < n_channels; c++)
+ pixels[(y * size + x) * n_channels + c] =
+ (0 == (qrc->data[off] & 1)) ? 0xFF : 0;
+ }
+ QRcode_free (qrc);
+ QRinput_free (qri);
+ // FIXME: use 'pixels'
+ GNUNET_free (pixels);
+}
+
+
+#endif
+
+
static void
SNACK_print_hex_info (const char*message,
const uint8_t *hexArray,
@@ -504,7 +601,9 @@ check_payment_cb (void *cls,
"Trying to talk to wallet to give it pay URI `%s'\n",
taler_pay_uri);
GNUNET_assert (NULL == pa->pnd);
- /* FIXME: show QR code here! */
+#if HAVE_QRENCODE_H
+ show_qrcode (taler_pay_uri);
+#endif
pa->taler_pay_uri = GNUNET_strdup (taler_pay_uri);
pa->task = GNUNET_SCHEDULER_add_now (&connect_nfc,
pa);
