mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
250 lines
5.1 KiB
C
250 lines
5.1 KiB
C
/*
|
|
* 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 = NLMSG_LENGTH(size - sizeof(*nlh));
|
|
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;
|
|
}
|