-subdir-y := accounting auxdisplay blackfin connector \
+subdir-y := accounting auxdisplay blackfin \
filesystems filesystems ia64 laptops mic misc-devices \
networking pcmcia prctl ptp timers vDSO video4linux \
watchdog
+++ /dev/null
-ifneq ($(CONFIG_CONNECTOR),)
-obj-m += cn_test.o
-endif
-
-# List of programs to build
-hostprogs-y := ucon
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
-
-all: modules
-
-modules clean:
- $(MAKE) -C ../.. SUBDIRS=$(PWD) $@
+++ /dev/null
-/*
- * cn_test.c
- *
- * 2004+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
- * All rights reserved.
- *
- * 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
- */
-
-#define pr_fmt(fmt) "cn_test: " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/timer.h>
-
-#include <linux/connector.h>
-
-static struct cb_id cn_test_id = { CN_NETLINK_USERS + 3, 0x456 };
-static char cn_test_name[] = "cn_test";
-static struct sock *nls;
-static struct timer_list cn_test_timer;
-
-static void cn_test_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
-{
- pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
- __func__, jiffies, msg->id.idx, msg->id.val,
- msg->seq, msg->ack, msg->len,
- msg->len ? (char *)msg->data : "");
-}
-
-/*
- * Do not remove this function even if no one is using it as
- * this is an example of how to get notifications about new
- * connector user registration
- */
-#if 0
-static int cn_test_want_notify(void)
-{
- struct cn_ctl_msg *ctl;
- struct cn_notify_req *req;
- struct cn_msg *msg = NULL;
- int size, size0;
- struct sk_buff *skb;
- struct nlmsghdr *nlh;
- u32 group = 1;
-
- size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req);
-
- size = NLMSG_SPACE(size0);
-
- skb = alloc_skb(size, GFP_ATOMIC);
- if (!skb) {
- pr_err("failed to allocate new skb with size=%u\n", size);
- return -ENOMEM;
- }
-
- nlh = nlmsg_put(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh), 0);
- if (!nlh) {
- kfree_skb(skb);
- return -EMSGSIZE;
- }
-
- msg = nlmsg_data(nlh);
-
- memset(msg, 0, size0);
-
- msg->id.idx = -1;
- msg->id.val = -1;
- msg->seq = 0x123;
- msg->ack = 0x345;
- msg->len = size0 - sizeof(*msg);
-
- ctl = (struct cn_ctl_msg *)(msg + 1);
-
- ctl->idx_notify_num = 1;
- ctl->val_notify_num = 2;
- ctl->group = group;
- ctl->len = msg->len - sizeof(*ctl);
-
- req = (struct cn_notify_req *)(ctl + 1);
-
- /*
- * Idx.
- */
- req->first = cn_test_id.idx;
- req->range = 10;
-
- /*
- * Val 0.
- */
- req++;
- req->first = cn_test_id.val;
- req->range = 10;
-
- /*
- * Val 1.
- */
- req++;
- req->first = cn_test_id.val + 20;
- req->range = 10;
-
- NETLINK_CB(skb).dst_group = ctl->group;
- //netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC);
- netlink_unicast(nls, skb, 0, 0);
-
- pr_info("request was sent: group=0x%x\n", ctl->group);
-
- return 0;
-}
-#endif
-
-static u32 cn_test_timer_counter;
-static void cn_test_timer_func(unsigned long __data)
-{
- struct cn_msg *m;
- char data[32];
-
- pr_debug("%s: timer fired with data %lu\n", __func__, __data);
-
- m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
- if (m) {
-
- memcpy(&m->id, &cn_test_id, sizeof(m->id));
- m->seq = cn_test_timer_counter;
- m->len = sizeof(data);
-
- m->len =
- scnprintf(data, sizeof(data), "counter = %u",
- cn_test_timer_counter) + 1;
-
- memcpy(m + 1, data, m->len);
-
- cn_netlink_send(m, 0, 0, GFP_ATOMIC);
- kfree(m);
- }
-
- cn_test_timer_counter++;
-
- mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
-}
-
-static int cn_test_init(void)
-{
- int err;
-
- err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
- if (err)
- goto err_out;
- cn_test_id.val++;
- err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
- if (err) {
- cn_del_callback(&cn_test_id);
- goto err_out;
- }
-
- setup_timer(&cn_test_timer, cn_test_timer_func, 0);
- mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
-
- pr_info("initialized with id={%u.%u}\n",
- cn_test_id.idx, cn_test_id.val);
-
- return 0;
-
- err_out:
- if (nls && nls->sk_socket)
- sock_release(nls->sk_socket);
-
- return err;
-}
-
-static void cn_test_fini(void)
-{
- del_timer_sync(&cn_test_timer);
- cn_del_callback(&cn_test_id);
- cn_test_id.val--;
- cn_del_callback(&cn_test_id);
- if (nls && nls->sk_socket)
- sock_release(nls->sk_socket);
-}
-
-module_init(cn_test_init);
-module_exit(cn_test_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
-MODULE_DESCRIPTION("Connector's test module");
Some work in netlink area is still being done, so things can be changed in
2.6.15 timeframe, if it will happen, documentation will be updated for that
kernel.
+
+/*****************************************/
+Code samples
+/*****************************************/
+
+Sample code for a connector test module and user space can be found
+in samples/connector/. To build this code, enable CONFIG_CONNECTOR
+and CONFIG_SAMPLES.
+++ /dev/null
-/*
- * ucon.c
- *
- * Copyright (c) 2004+ Evgeniy Polyakov <zbr@ioremap.net>
- *
- *
- * 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
- */
-
-#include <asm/types.h>
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/poll.h>
-
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-
-#include <arpa/inet.h>
-
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <time.h>
-#include <getopt.h>
-
-#include <linux/connector.h>
-
-#define DEBUG
-#define NETLINK_CONNECTOR 11
-
-/* Hopefully your userspace connector.h matches this kernel */
-#define CN_TEST_IDX CN_NETLINK_USERS + 3
-#define CN_TEST_VAL 0x456
-
-#ifdef DEBUG
-#define ulog(f, a...) fprintf(stdout, f, ##a)
-#else
-#define ulog(f, a...) do {} while (0)
-#endif
-
-static int need_exit;
-static __u32 seq;
-
-static int netlink_send(int s, struct cn_msg *msg)
-{
- struct nlmsghdr *nlh;
- unsigned int size;
- int err;
- char buf[128];
- struct cn_msg *m;
-
- size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
-
- nlh = (struct nlmsghdr *)buf;
- nlh->nlmsg_seq = seq++;
- nlh->nlmsg_pid = getpid();
- nlh->nlmsg_type = NLMSG_DONE;
- nlh->nlmsg_len = size;
- nlh->nlmsg_flags = 0;
-
- m = NLMSG_DATA(nlh);
-#if 0
- ulog("%s: [%08x.%08x] len=%u, seq=%u, ack=%u.\n",
- __func__, msg->id.idx, msg->id.val, msg->len, msg->seq, msg->ack);
-#endif
- memcpy(m, msg, sizeof(*m) + msg->len);
-
- err = send(s, nlh, size, 0);
- if (err == -1)
- ulog("Failed to send: %s [%d].\n",
- strerror(errno), errno);
-
- return err;
-}
-
-static void usage(void)
-{
- printf(
- "Usage: ucon [options] [output file]\n"
- "\n"
- "\t-h\tthis help screen\n"
- "\t-s\tsend buffers to the test module\n"
- "\n"
- "The default behavior of ucon is to subscribe to the test module\n"
- "and wait for state messages. Any ones received are dumped to the\n"
- "specified output file (or stdout). The test module is assumed to\n"
- "have an id of {%u.%u}\n"
- "\n"
- "If you get no output, then verify the cn_test module id matches\n"
- "the expected id above.\n"
- , CN_TEST_IDX, CN_TEST_VAL
- );
-}
-
-int main(int argc, char *argv[])
-{
- int s;
- char buf[1024];
- int len;
- struct nlmsghdr *reply;
- struct sockaddr_nl l_local;
- struct cn_msg *data;
- FILE *out;
- time_t tm;
- struct pollfd pfd;
- bool send_msgs = false;
-
- while ((s = getopt(argc, argv, "hs")) != -1) {
- switch (s) {
- case 's':
- send_msgs = true;
- break;
-
- case 'h':
- usage();
- return 0;
-
- default:
- /* getopt() outputs an error for us */
- usage();
- return 1;
- }
- }
-
- if (argc != optind) {
- out = fopen(argv[optind], "a+");
- if (!out) {
- ulog("Unable to open %s for writing: %s\n",
- argv[1], strerror(errno));
- out = stdout;
- }
- } else
- out = stdout;
-
- memset(buf, 0, sizeof(buf));
-
- s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
- if (s == -1) {
- perror("socket");
- return -1;
- }
-
- l_local.nl_family = AF_NETLINK;
- l_local.nl_groups = -1; /* bitmask of requested groups */
- l_local.nl_pid = 0;
-
- ulog("subscribing to %u.%u\n", CN_TEST_IDX, CN_TEST_VAL);
-
- if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) {
- perror("bind");
- close(s);
- return -1;
- }
-
-#if 0
- {
- int on = 0x57; /* Additional group number */
- setsockopt(s, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &on, sizeof(on));
- }
-#endif
- if (send_msgs) {
- int i, j;
-
- memset(buf, 0, sizeof(buf));
-
- data = (struct cn_msg *)buf;
-
- data->id.idx = CN_TEST_IDX;
- data->id.val = CN_TEST_VAL;
- data->seq = seq++;
- data->ack = 0;
- data->len = 0;
-
- for (j=0; j<10; ++j) {
- for (i=0; i<1000; ++i) {
- len = netlink_send(s, data);
- }
-
- ulog("%d messages have been sent to %08x.%08x.\n", i, data->id.idx, data->id.val);
- }
-
- return 0;
- }
-
-
- pfd.fd = s;
-
- while (!need_exit) {
- pfd.events = POLLIN;
- pfd.revents = 0;
- switch (poll(&pfd, 1, -1)) {
- case 0:
- need_exit = 1;
- break;
- case -1:
- if (errno != EINTR) {
- need_exit = 1;
- break;
- }
- continue;
- }
- if (need_exit)
- break;
-
- memset(buf, 0, sizeof(buf));
- len = recv(s, buf, sizeof(buf), 0);
- if (len == -1) {
- perror("recv buf");
- close(s);
- return -1;
- }
- reply = (struct nlmsghdr *)buf;
-
- switch (reply->nlmsg_type) {
- case NLMSG_ERROR:
- fprintf(out, "Error message received.\n");
- fflush(out);
- break;
- case NLMSG_DONE:
- data = (struct cn_msg *)NLMSG_DATA(reply);
-
- time(&tm);
- fprintf(out, "%.24s : [%x.%x] [%08u.%08u].\n",
- ctime(&tm), data->id.idx, data->id.val, data->seq, data->ack);
- fflush(out);
- break;
- default:
- break;
- }
- }
-
- close(s);
- return 0;
-}
help
Builds a sample configfs interface.
+config SAMPLE_CONNECTOR
+ tristate "Build connector sample -- loadable modules only"
+ depends on CONNECTOR && m
+ help
+ When enabled, this builds both a sample kernel module for
+ the connector interface and a user space tool to communicate
+ with it.
+ See also Documentation/connector/connector.txt
+
endif # SAMPLES
obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ trace_events/ livepatch/ \
hw_breakpoint/ kfifo/ kdb/ hidraw/ rpmsg/ seccomp/ \
- configfs/
+ configfs/ connector/
--- /dev/null
+obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o
+
+# List of programs to build
+ifdef CONFIG_SAMPLE_CONNECTOR
+hostprogs-y := ucon
+endif
+
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
+
+HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
+
+all: modules
+
+modules clean:
+ $(MAKE) -C ../.. SUBDIRS=$(PWD) $@
--- /dev/null
+/*
+ * cn_test.c
+ *
+ * 2004+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
+ * All rights reserved.
+ *
+ * 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
+ */
+
+#define pr_fmt(fmt) "cn_test: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+
+#include <linux/connector.h>
+
+static struct cb_id cn_test_id = { CN_NETLINK_USERS + 3, 0x456 };
+static char cn_test_name[] = "cn_test";
+static struct sock *nls;
+static struct timer_list cn_test_timer;
+
+static void cn_test_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
+{
+ pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
+ __func__, jiffies, msg->id.idx, msg->id.val,
+ msg->seq, msg->ack, msg->len,
+ msg->len ? (char *)msg->data : "");
+}
+
+/*
+ * Do not remove this function even if no one is using it as
+ * this is an example of how to get notifications about new
+ * connector user registration
+ */
+#if 0
+static int cn_test_want_notify(void)
+{
+ struct cn_ctl_msg *ctl;
+ struct cn_notify_req *req;
+ struct cn_msg *msg = NULL;
+ int size, size0;
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+ u32 group = 1;
+
+ size0 = sizeof(*msg) + sizeof(*ctl) + 3 * sizeof(*req);
+
+ size = NLMSG_SPACE(size0);
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb) {
+ pr_err("failed to allocate new skb with size=%u\n", size);
+ return -ENOMEM;
+ }
+
+ nlh = nlmsg_put(skb, 0, 0x123, NLMSG_DONE, size - sizeof(*nlh), 0);
+ if (!nlh) {
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+
+ msg = nlmsg_data(nlh);
+
+ memset(msg, 0, size0);
+
+ msg->id.idx = -1;
+ msg->id.val = -1;
+ msg->seq = 0x123;
+ msg->ack = 0x345;
+ msg->len = size0 - sizeof(*msg);
+
+ ctl = (struct cn_ctl_msg *)(msg + 1);
+
+ ctl->idx_notify_num = 1;
+ ctl->val_notify_num = 2;
+ ctl->group = group;
+ ctl->len = msg->len - sizeof(*ctl);
+
+ req = (struct cn_notify_req *)(ctl + 1);
+
+ /*
+ * Idx.
+ */
+ req->first = cn_test_id.idx;
+ req->range = 10;
+
+ /*
+ * Val 0.
+ */
+ req++;
+ req->first = cn_test_id.val;
+ req->range = 10;
+
+ /*
+ * Val 1.
+ */
+ req++;
+ req->first = cn_test_id.val + 20;
+ req->range = 10;
+
+ NETLINK_CB(skb).dst_group = ctl->group;
+ //netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC);
+ netlink_unicast(nls, skb, 0, 0);
+
+ pr_info("request was sent: group=0x%x\n", ctl->group);
+
+ return 0;
+}
+#endif
+
+static u32 cn_test_timer_counter;
+static void cn_test_timer_func(unsigned long __data)
+{
+ struct cn_msg *m;
+ char data[32];
+
+ pr_debug("%s: timer fired with data %lu\n", __func__, __data);
+
+ m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
+ if (m) {
+
+ memcpy(&m->id, &cn_test_id, sizeof(m->id));
+ m->seq = cn_test_timer_counter;
+ m->len = sizeof(data);
+
+ m->len =
+ scnprintf(data, sizeof(data), "counter = %u",
+ cn_test_timer_counter) + 1;
+
+ memcpy(m + 1, data, m->len);
+
+ cn_netlink_send(m, 0, 0, GFP_ATOMIC);
+ kfree(m);
+ }
+
+ cn_test_timer_counter++;
+
+ mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
+}
+
+static int cn_test_init(void)
+{
+ int err;
+
+ err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
+ if (err)
+ goto err_out;
+ cn_test_id.val++;
+ err = cn_add_callback(&cn_test_id, cn_test_name, cn_test_callback);
+ if (err) {
+ cn_del_callback(&cn_test_id);
+ goto err_out;
+ }
+
+ setup_timer(&cn_test_timer, cn_test_timer_func, 0);
+ mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
+
+ pr_info("initialized with id={%u.%u}\n",
+ cn_test_id.idx, cn_test_id.val);
+
+ return 0;
+
+ err_out:
+ if (nls && nls->sk_socket)
+ sock_release(nls->sk_socket);
+
+ return err;
+}
+
+static void cn_test_fini(void)
+{
+ del_timer_sync(&cn_test_timer);
+ cn_del_callback(&cn_test_id);
+ cn_test_id.val--;
+ cn_del_callback(&cn_test_id);
+ if (nls && nls->sk_socket)
+ sock_release(nls->sk_socket);
+}
+
+module_init(cn_test_init);
+module_exit(cn_test_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
+MODULE_DESCRIPTION("Connector's test module");
--- /dev/null
+/*
+ * ucon.c
+ *
+ * Copyright (c) 2004+ Evgeniy Polyakov <zbr@ioremap.net>
+ *
+ *
+ * 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
+ */
+
+#include <asm/types.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/poll.h>
+
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+#include <arpa/inet.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+#include <getopt.h>
+
+#include <linux/connector.h>
+
+#define DEBUG
+#define NETLINK_CONNECTOR 11
+
+/* Hopefully your userspace connector.h matches this kernel */
+#define CN_TEST_IDX CN_NETLINK_USERS + 3
+#define CN_TEST_VAL 0x456
+
+#ifdef DEBUG
+#define ulog(f, a...) fprintf(stdout, f, ##a)
+#else
+#define ulog(f, a...) do {} while (0)
+#endif
+
+static int need_exit;
+static __u32 seq;
+
+static int netlink_send(int s, struct cn_msg *msg)
+{
+ struct nlmsghdr *nlh;
+ unsigned int size;
+ int err;
+ char buf[128];
+ struct cn_msg *m;
+
+ size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
+
+ nlh = (struct nlmsghdr *)buf;
+ nlh->nlmsg_seq = seq++;
+ nlh->nlmsg_pid = getpid();
+ nlh->nlmsg_type = NLMSG_DONE;
+ nlh->nlmsg_len = size;
+ nlh->nlmsg_flags = 0;
+
+ m = NLMSG_DATA(nlh);
+#if 0
+ ulog("%s: [%08x.%08x] len=%u, seq=%u, ack=%u.\n",
+ __func__, msg->id.idx, msg->id.val, msg->len, msg->seq, msg->ack);
+#endif
+ memcpy(m, msg, sizeof(*m) + msg->len);
+
+ err = send(s, nlh, size, 0);
+ if (err == -1)
+ ulog("Failed to send: %s [%d].\n",
+ strerror(errno), errno);
+
+ return err;
+}
+
+static void usage(void)
+{
+ printf(
+ "Usage: ucon [options] [output file]\n"
+ "\n"
+ "\t-h\tthis help screen\n"
+ "\t-s\tsend buffers to the test module\n"
+ "\n"
+ "The default behavior of ucon is to subscribe to the test module\n"
+ "and wait for state messages. Any ones received are dumped to the\n"
+ "specified output file (or stdout). The test module is assumed to\n"
+ "have an id of {%u.%u}\n"
+ "\n"
+ "If you get no output, then verify the cn_test module id matches\n"
+ "the expected id above.\n"
+ , CN_TEST_IDX, CN_TEST_VAL
+ );
+}
+
+int main(int argc, char *argv[])
+{
+ int s;
+ char buf[1024];
+ int len;
+ struct nlmsghdr *reply;
+ struct sockaddr_nl l_local;
+ struct cn_msg *data;
+ FILE *out;
+ time_t tm;
+ struct pollfd pfd;
+ bool send_msgs = false;
+
+ while ((s = getopt(argc, argv, "hs")) != -1) {
+ switch (s) {
+ case 's':
+ send_msgs = true;
+ break;
+
+ case 'h':
+ usage();
+ return 0;
+
+ default:
+ /* getopt() outputs an error for us */
+ usage();
+ return 1;
+ }
+ }
+
+ if (argc != optind) {
+ out = fopen(argv[optind], "a+");
+ if (!out) {
+ ulog("Unable to open %s for writing: %s\n",
+ argv[1], strerror(errno));
+ out = stdout;
+ }
+ } else
+ out = stdout;
+
+ memset(buf, 0, sizeof(buf));
+
+ s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
+ if (s == -1) {
+ perror("socket");
+ return -1;
+ }
+
+ l_local.nl_family = AF_NETLINK;
+ l_local.nl_groups = -1; /* bitmask of requested groups */
+ l_local.nl_pid = 0;
+
+ ulog("subscribing to %u.%u\n", CN_TEST_IDX, CN_TEST_VAL);
+
+ if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) {
+ perror("bind");
+ close(s);
+ return -1;
+ }
+
+#if 0
+ {
+ int on = 0x57; /* Additional group number */
+ setsockopt(s, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &on, sizeof(on));
+ }
+#endif
+ if (send_msgs) {
+ int i, j;
+
+ memset(buf, 0, sizeof(buf));
+
+ data = (struct cn_msg *)buf;
+
+ data->id.idx = CN_TEST_IDX;
+ data->id.val = CN_TEST_VAL;
+ data->seq = seq++;
+ data->ack = 0;
+ data->len = 0;
+
+ for (j=0; j<10; ++j) {
+ for (i=0; i<1000; ++i) {
+ len = netlink_send(s, data);
+ }
+
+ ulog("%d messages have been sent to %08x.%08x.\n", i, data->id.idx, data->id.val);
+ }
+
+ return 0;
+ }
+
+
+ pfd.fd = s;
+
+ while (!need_exit) {
+ pfd.events = POLLIN;
+ pfd.revents = 0;
+ switch (poll(&pfd, 1, -1)) {
+ case 0:
+ need_exit = 1;
+ break;
+ case -1:
+ if (errno != EINTR) {
+ need_exit = 1;
+ break;
+ }
+ continue;
+ }
+ if (need_exit)
+ break;
+
+ memset(buf, 0, sizeof(buf));
+ len = recv(s, buf, sizeof(buf), 0);
+ if (len == -1) {
+ perror("recv buf");
+ close(s);
+ return -1;
+ }
+ reply = (struct nlmsghdr *)buf;
+
+ switch (reply->nlmsg_type) {
+ case NLMSG_ERROR:
+ fprintf(out, "Error message received.\n");
+ fflush(out);
+ break;
+ case NLMSG_DONE:
+ data = (struct cn_msg *)NLMSG_DATA(reply);
+
+ time(&tm);
+ fprintf(out, "%.24s : [%x.%x] [%08u.%08u].\n",
+ ctime(&tm), data->id.idx, data->id.val, data->seq, data->ack);
+ fflush(out);
+ break;
+ default:
+ break;
+ }
+ }
+
+ close(s);
+ return 0;
+}
projects / linux-2.6-block.git / commitdiff