qcdm: add utility to display and set the "IPv6 enabled" variable

Signed-off-by: Bjørn Mork <bjorn@mork.no>

.gitignore

@@ -61,6 +61,7 @@ vapi/libmm-glib.vapi
 
 libqcdm/tests/test-qcdm
 libqcdm/tests/modepref
+libqcdm/tests/ipv6pref
 libwmc/tests/test-wmc
 
 data/org.freedesktop.ModemManager1.conf

libqcdm/tests/Makefile.am

@@ -1,6 +1,6 @@
 include $(top_srcdir)/gtester.make
 
-noinst_PROGRAMS = test-qcdm modepref
+noinst_PROGRAMS = test-qcdm modepref ipv6pref
 TEST_PROGS += test-qcdm
 
 INCLUDES = \
@@ -26,10 +26,16 @@ modepref_SOURCES = modepref.c
 modepref_CPPFLAGS = $(MM_CFLAGS)
 modepref_LDADD = $(MM_LIBS)
 
+ipv6pref_SOURCES = ipv6pref.c
+ipv6pref_CPPFLAGS = $(MM_CFLAGS)
+ipv6pref_LDADD = $(MM_LIBS)
+
 if QCDM_STANDALONE
 test_qcdm_LDADD += $(top_builddir)/src/libqcdm.la
 modepref_LDADD += $(top_builddir)/src/libqcdm.la
+ipv6pref_LDADD += $(top_builddir)/src/libqcdm.la
 else
 test_qcdm_LDADD += $(top_builddir)/libqcdm/src/libqcdm.la
 modepref_LDADD += $(top_builddir)/libqcdm/src/libqcdm.la
+ipv6pref_LDADD += $(top_builddir)/libqcdm/src/libqcdm.la
 endif

libqcdm/tests/ipv6pref.c

@@ -0,0 +1,316 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <assert.h>
+#include <unistd.h>
+
+#include "utils.h"
+#include "errors.h"
+#include "commands.h"
+#include "com.h"
+
+static int debug = 0;
+
+static void
+print_buf (const char *detail, const char *buf, size_t len)
+{
+	int i = 0, z;
+	qcdmbool newline = FALSE;
+	char tmp[500];
+	u_int32_t flen;
+
+	flen = snprintf (tmp, sizeof (tmp) - 1, "%s (%zu)  ", detail, len);
+	fprintf (stdout, "%s", tmp);
+	for (i = 0; i < len; i++) {
+		fprintf (stdout, "%02x ", buf[i] & 0xFF);
+		if (((i + 1) % 16) == 0) {
+			fprintf (stdout, "\n");
+			z = flen;
+			while (z--)
+				fprintf (stdout, " ");
+			newline = TRUE;
+		} else
+			newline = FALSE;
+	}
+
+	if (!newline)
+		fprintf (stdout, "\n");
+}
+
+static int
+com_setup (const char *port)
+{
+	int ret, fd;
+
+	errno = 0;
+	fd = open (port, O_RDWR | O_EXCL | O_NONBLOCK | O_NOCTTY);
+	if (fd < 0) {
+		fprintf (stderr, "E: failed to open port %s\n", port);
+		return -1;
+	}
+
+	ret = ioctl (fd, TIOCEXCL);
+	if (ret) {
+		fprintf (stderr, "E: failed to lock port %s\n", port);
+		close (fd);
+		return -1;
+	}
+
+	return fd;
+}
+
+/******************************************************************/
+
+static qcdmbool
+qcdm_send (int fd, char *buf, size_t len)
+{
+	int status;
+	int eagain_count = 1000;
+	size_t i = 0;
+
+	if (debug)
+		print_buf ("DM:ENC>>>", buf, len);
+
+	while (i < len) {
+		errno = 0;
+		status = write (fd, &buf[i], 1);
+		if (status < 0) {
+			if (errno == EAGAIN) {
+				eagain_count--;
+				if (eagain_count <= 0)
+					return FALSE;
+			} else
+				assert (errno == 0);
+		} else
+			i++;
+
+		usleep (1000);
+	}
+
+	return TRUE;
+}
+
+static size_t
+qcdm_wait_reply (int fd, char *buf, size_t len)
+{
+	fd_set in;
+	int result;
+	struct timeval timeout = { 1, 0 };
+	char readbuf[1024];
+	ssize_t bytes_read;
+	int total = 0, retries = 0;
+	size_t decap_len = 0;
+
+	FD_ZERO (&in);
+	FD_SET (fd, &in);
+	result = select (fd + 1, &in, NULL, NULL, &timeout);
+	if (result != 1 || !FD_ISSET (fd, &in))
+		return 0;
+
+	do {
+		errno = 0;
+		bytes_read = read (fd, &readbuf[total], 1);
+		if ((bytes_read == 0) || (errno == EAGAIN)) {
+			/* Haven't gotten the async control char yet */
+			if (retries > 20)
+				return 0; /* 2 seconds, give up */
+
+			/* Otherwise wait a bit and try again */
+			usleep (100000);
+			retries++;
+			continue;
+		} else if (bytes_read == 1) {
+			qcdmbool more = FALSE;
+			qcdmbool success;
+			size_t used = 0;
+
+			total++;
+			decap_len = 0;
+			success = dm_decapsulate_buffer (readbuf, total, buf, len, &decap_len, &used, &more);
+
+			/* Discard used data */
+			if (used > 0) {
+				total -= used;
+				memmove (readbuf, &readbuf[used], total);
+			}
+
+			if (success && !more) {
+				/* Success; we have a packet */
+				break;
+			}
+		} else {
+			/* Some error occurred */
+			return 0;
+		}
+	} while (total < sizeof (readbuf));
+
+	if (debug)
+		print_buf ("QCDM:DEC<<", buf, decap_len);
+
+	return decap_len;
+}
+
+static int
+qcdm_set_ipv6_enabled (int fd, u_int8_t ipv6pref)
+{
+	int err;
+	char buf[512];
+	size_t len;
+	QcdmResult *result;
+	size_t reply_len;
+
+	len = qcdm_cmd_nv_set_ipv6_enabled_new (buf, sizeof (buf), ipv6pref);
+	assert (len);
+
+	/* Send the command */
+	if (!qcdm_send (fd, buf, len)) {
+		fprintf (stderr, "E: failed to send QCDM IPv6 enabled command\n");
+		return -1;
+	}
+
+	reply_len = qcdm_wait_reply (fd, buf, sizeof (buf));
+	if (!reply_len) {
+		fprintf (stderr, "E: failed to receive QCDM IPv6 enabled command reply\n");
+		return -1;
+	}
+
+	/* Parse the response into a result structure */
+	err = QCDM_SUCCESS;
+	result = qcdm_cmd_nv_set_ipv6_enabled_result (buf, reply_len, &err);
+	if (!result) {
+		fprintf (stderr, "E: failed to parse QCDM IPv6 enabled command reply: %d\n", err);
+		return -1;
+	}
+
+	qcdm_result_unref (result);
+	return 0;
+}
+
+static int
+qcdm_get_ipv6_enabled (int fd)
+{
+	int err;
+	char buf[512];
+	size_t len;
+	QcdmResult *result;
+	size_t reply_len;
+	u_int8_t mode;
+
+	len = qcdm_cmd_nv_get_ipv6_enabled_new (buf, sizeof (buf));
+	assert (len);
+
+	/* Send the command */
+	if (!qcdm_send (fd, buf, len)) {
+		fprintf (stderr, "E: failed to send QCDM IPv6 enabled command\n");
+		return -1;
+	}
+
+	reply_len = qcdm_wait_reply (fd, buf, sizeof (buf));
+	if (!reply_len) {
+		fprintf (stderr, "E: failed to receive QCDM IPv6 pref command reply\n");
+		return -1;
+	}
+
+	/* Parse the response into a result structure */
+	err = QCDM_SUCCESS;
+	result = qcdm_cmd_nv_get_ipv6_enabled_result (buf, reply_len, &err);
+	if (!result) {
+		/* An inactive NVRAM entry has the same effect as setting "disabled" */
+		if (err == -QCDM_ERROR_NV_ERROR_INACTIVE)
+			return QCDM_CMD_NV_IPV6_ENABLED_OFF;
+
+		fprintf (stderr, "E: failed to parse QCDM IPv6 enabled command reply: %d\n", err);
+		return -1;
+	}
+
+    err = qcdm_result_get_u8 (result, QCDM_CMD_NV_GET_IPV6_ENABLED_ITEM_ENABLED, &mode);
+	qcdm_result_unref (result);
+	return mode;
+}
+
+/******************************************************************/
+
+static void
+usage (const char *prog)
+{
+	fprintf (stderr, "Usage: %s <DM port> [--enable|--disable] [--debug]\n", prog);
+	fprintf (stderr, "         Current mode will always be printed.\n\n");
+}
+
+int
+main (int argc, char *argv[])
+{
+	const char *dmport = argv[1];
+	int fd, err, old, new = -1;
+
+	if (argc < 2 || argc > 4) {
+		usage (argv[0]);
+		return 1;
+	}
+
+	if (argc >= 3) {
+		if (strcasecmp (argv[2], "--debug") == 0)
+			debug = 1;
+		else if (strcasecmp (argv[2], "--enable") == 0)
+			new = QCDM_CMD_NV_IPV6_ENABLED_ON;
+		else if (strcasecmp (argv[2], "--disable") == 0)
+			new = QCDM_CMD_NV_IPV6_ENABLED_OFF;
+		else
+			usage (argv[0]);
+
+		if (argc >= 4 && strcasecmp (argv[3], "--debug") == 0)
+			debug = 1;
+	}
+
+	if (debug)
+		putenv ("QCDM_DEBUG=1");
+
+	fd = com_setup (dmport);
+	if (fd < 0)
+		return 1;
+
+	err = qcdm_port_setup (fd);
+	if (err != QCDM_SUCCESS) {
+		fprintf (stderr, "E: failed to set up DM port %s: %d\n", dmport, err);
+		return 1;
+	}
+
+	old = qcdm_get_ipv6_enabled (fd);
+	if (old < 0) {
+		fprintf (stderr, "E: failed to get IPv6 state\n");
+		return 1;
+	}
+	fprintf (stdout, "IPv6: %s\n", old ? "enabled" : "disabled");
+
+	if (new >=0 && old != new) {
+		if (qcdm_set_ipv6_enabled (fd, new))
+			fprintf (stdout, "Failed to %s IPv6\n", new ? "enable" : "disable");
+		else
+			fprintf (stdout, "IPv6 successfully %s. Replug your device.\n", new ? "enabled" : "disabled");
+	}
+
+	return 0;
+}
+