mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-08 08:26:14 +00:00
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fdleak.h"
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void server ()
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{
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int s, x;
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struct sockaddr_in baddr;
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struct sockaddr_in addr;
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socklen_t baddrsize = sizeof(baddr);
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int one = 1;
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s = DO( socket(PF_INET, SOCK_STREAM, 0) );
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(void) DO( setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(int)) );
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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addr.sin_port = htons(12321);
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(void) DO( bind(s, (struct sockaddr *)&addr, sizeof(addr)) );
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(void) DO( listen(s, 5) );
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memset(&baddr, 0, sizeof(baddr));
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x = DO( accept(s, (struct sockaddr *)&baddr, &baddrsize) );
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(void) DO( write(x, "hello", 6) );
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}
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void client ()
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{
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int s, count = 0, ret;
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struct sockaddr_in addr;
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char buf[1024];
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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addr.sin_port = htons(12321);
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do {
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count++;
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s = DO( socket(PF_INET, SOCK_STREAM, 0) );
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ret = connect(s, (struct sockaddr *)&addr, sizeof(addr));
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if (ret == -1) {
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// If the connect() failed, we close the socket and reopen it before
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// trying again. This isn't necessary on Linux, but it is on Darwin.
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(void) DO( close(s) );
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sleep(1);
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}
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} while (count < 10 && ret == -1);
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if (ret == -1) {
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perror("connect");
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exit(1);
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}
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(void) DO( read(s, buf, sizeof(buf)) );
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printf("%s\n", buf);
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}
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int main (int argc, char **argv)
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{
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int pid, status;
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CLOSE_INHERITED_FDS;
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if ((pid = fork()) == 0) {
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server();
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return 0;
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}
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client();
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wait(&status);
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return 0;
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}
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