为什么80%的码农都做不了架构师？>>> 
/* ------------------------------------------------------------------------
*
* client_tipc.c
*
* Short description: TIPC hello world demo (client side)
* ------------------------------------------------------------------------
*
* Copyright (c) 2003, Ericsson Research Canada
* Copyright (c) 2010 Wind River Systems
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither the name of Ericsson Research Canada nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------------------------------------------------------------
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define SERVER_TYPE 18888
#define SERVER_INST 17
void wait_for_server(__u32 name_type, __u32 name_instance, int wait)
{
struct sockaddr_tipc topsrv;
struct tipc_subscr subscr;
struct tipc_event event;
int sd = socket(AF_TIPC, SOCK_SEQPACKET, 0);
memset(&topsrv, 0, sizeof(topsrv));
topsrv.family = AF_TIPC;
topsrv.addrtype = TIPC_ADDR_NAME;
topsrv.addr.name.name.type = TIPC_TOP_SRV;
topsrv.addr.name.name.instance = TIPC_TOP_SRV;
/* Connect to topology server */
if (0 > connect(sd, (struct sockaddr *)&topsrv, sizeof(topsrv))) {
perror("Client: failed to connect to topology server");
exit(1);
}
subscr.seq.type = htonl(name_type);
subscr.seq.lower = htonl(name_instance);
subscr.seq.upper = htonl(name_instance);
subscr.timeout = htonl(wait);
subscr.filter = htonl(TIPC_SUB_SERVICE);
if (send(sd, &subscr, sizeof(subscr), 0) != sizeof(subscr)) {
perror("Client: failed to send subscription");
exit(1);
}
/* Now wait for the subscription to fire */
if (recv(sd, &event, sizeof(event), 0) != sizeof(event)) {
perror("Client: failed to receive event");
exit(1);
}
if (event.event != htonl(TIPC_PUBLISHED)) {
printf("Client: server {%u,%u} not published within %u [s]\n",
name_type, name_instance, wait/1000);
exit(1);
}
close(sd);
}
int main(int argc, char *argv[], char *dummy[])
{
int sd;
struct sockaddr_tipc server_addr;
char buf[40] = {"Hello World"};
printf("****** TIPC client hello world program started ******\n\n");
wait_for_server(SERVER_TYPE, SERVER_INST, 10000);
sd = socket(AF_TIPC, SOCK_RDM, 0);
server_addr.family = AF_TIPC;
server_addr.addrtype = TIPC_ADDR_NAME;
server_addr.addr.name.name.type = SERVER_TYPE;
server_addr.addr.name.name.instance = SERVER_INST;
server_addr.addr.name.domain = 0;
if (0 > sendto(sd, buf, strlen(buf)+1, 0,
(struct sockaddr*)&server_addr, sizeof(server_addr))) {
perror("Client: failed to send");
exit(1);
}
if (0 >= recv(sd, buf, sizeof(buf), 0)) {
perror("Client: unexpected response");
exit(1);
}
printf("Client: received response: %s \n", buf);
printf("\n****** TIPC client hello program finished ******\n");
exit(0);
}