4 * Copyright (c) 2004+ Evgeniy Polyakov <johnpol@2ka.mipt.ru>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <asm/types.h>
24 #include <sys/types.h>
25 #include <sys/socket.h>
28 #include <linux/netlink.h>
29 #include <linux/rtnetlink.h>
31 #include <arpa/inet.h>
40 #include <linux/connector.h>
43 #define NETLINK_CONNECTOR 11
46 #define ulog(f, a...) fprintf(stdout, f, ##a)
48 #define ulog(f, a...) do {} while (0)
54 static int netlink_send(int s, struct cn_msg *msg)
62 size = NLMSG_SPACE(sizeof(struct cn_msg) + msg->len);
64 nlh = (struct nlmsghdr *)buf;
65 nlh->nlmsg_seq = seq++;
66 nlh->nlmsg_pid = getpid();
67 nlh->nlmsg_type = NLMSG_DONE;
68 nlh->nlmsg_len = NLMSG_LENGTH(size - sizeof(*nlh));
73 ulog("%s: [%08x.%08x] len=%u, seq=%u, ack=%u.\n",
74 __func__, msg->id.idx, msg->id.val, msg->len, msg->seq, msg->ack);
76 memcpy(m, msg, sizeof(*m) + msg->len);
78 err = send(s, nlh, size, 0);
80 ulog("Failed to send: %s [%d].\n",
81 strerror(errno), errno);
86 int main(int argc, char *argv[])
91 struct nlmsghdr *reply;
92 struct sockaddr_nl l_local;
101 out = fopen(argv[1], "a+");
103 ulog("Unable to open %s for writing: %s\n",
104 argv[1], strerror(errno));
109 memset(buf, 0, sizeof(buf));
111 s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
117 l_local.nl_family = AF_NETLINK;
118 l_local.nl_groups = 0x123; /* bitmask of requested groups */
121 if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) {
129 int on = 0x57; /* Additional group number */
130 setsockopt(s, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &on, sizeof(on));
136 memset(buf, 0, sizeof(buf));
138 data = (struct cn_msg *)buf;
140 data->id.idx = 0x123;
141 data->id.val = 0x456;
146 for (j=0; j<10; ++j) {
147 for (i=0; i<1000; ++i) {
148 len = netlink_send(s, data);
151 ulog("%d messages have been sent to %08x.%08x.\n", i, data->id.idx, data->id.val);
163 switch (poll(&pfd, 1, -1)) {
168 if (errno != EINTR) {
177 memset(buf, 0, sizeof(buf));
178 len = recv(s, buf, sizeof(buf), 0);
184 reply = (struct nlmsghdr *)buf;
186 switch (reply->nlmsg_type) {
188 fprintf(out, "Error message received.\n");
192 data = (struct cn_msg *)NLMSG_DATA(reply);
195 fprintf(out, "%.24s : [%x.%x] [%08u.%08u].\n",
196 ctime(&tm), data->id.idx, data->id.val, data->seq, data->ack);