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<![CDATA[
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define BUFFSIZE BUFSIZ
int
main(int argc, char *argv[])
{
int port;
int socket_fd;
char str[BUFFSIZE];
struct sockaddr_in addr;
if(argc >= 4) {
printf("Usage: %s [IP_address [a] ] \n", argv[0]);
return 1;
}
if(argc == 1) {
strcpy(str, "133.13.59.46");
} else {
strcpy(str, argv[1]);
}
printf("Address = \"%s\" Portscan started..\n", str);
for(port=1; port<1024; port++) {
if((socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
return 1;
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(str);
addr.sin_port = htons(port);
if(connect(socket_fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
} else {
printf("Open TCP Port: %4d\n", port);
}
close(socket_fd);
}
printf("Portscan find them.\n");
}
]]>
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