66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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static const char * int2ip(unsigned int ip) {
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static char s[16];
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sprintf(s,"%d.%d.%d.%d",ip>>24,ip<<8>>24,ip<<16>>24,ip<<24>>24);
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return s;
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}
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int main()
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{
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int sock, listener;
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struct sockaddr_in addr;
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char buf[1024];
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int bytes_read;
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listener = socket(AF_INET, SOCK_STREAM, 0);
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if(listener < 0)
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{
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perror("socket");
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exit(1);
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(3425);
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if(bind(listener, (struct sockaddr *)&addr, sizeof(addr)) < 0)
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{
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perror("bind");
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exit(2);
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}
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listen(listener, 1);
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//~ printf("%X\n",addr.sin_addr.s_addr);
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while(1)
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{
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socklen_t n = sizeof(struct sockaddr);
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sock = accept(listener, (struct sockaddr *)&addr, &n);
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printf("incoming request from %s\n",int2ip(ntohl(addr.sin_addr.s_addr)));
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//~ printf("%X\n",addr.sin_addr.s_addr);
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if(sock < 0)
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{
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perror("accept");
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exit(3);
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}
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while(1)
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{
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bytes_read = recv(sock, buf, 1024, 0);
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if(bytes_read <= 0) break;
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send(sock, buf, bytes_read, 0);
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printf("%s", buf);
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}
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close(sock);
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}
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return 0;
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}
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