----- Original Message -----
From: "Paul Patrick C. Prantilla" <[EMAIL PROTECTED]>
To: "Philippine Linux Users' Group (PLUG) Technical Discussion List"
<[email protected]>
Sent: Thursday, August 10, 2006 3:57 PM
Subject: Re: [plug] auto sending text to tcp port
Hello,
You can use ncat for this.
echo "ehlo mailserver.com" | nc <some ip address> 25
<snip>
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250 8BITMIME
Hope that helps.
-Paul
jhuniepi wrote:
yeah i always use telnet but that's my problem. i cant send string to tcp
port automatically using telnet command. i have to enter the telnet
environment to issue a command. And my program is the service that run on
a certain tcp port. the format is just plain text with no encryption.:)
On 8/10/06, *Ariz Jacinto* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
you can always use the telnet command :) sending a string is one
thing
but if you're going to send it to a known service, better comply
with the
format whether its XML or not.
here is a simple socket programming for your needs...
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define HOST "127.0.0.1"
#define PORT 80
void error(char *errmsg) {
fprintf(stderr, "%s\n", errmsg);
exit(1);
}
int main(int argc, char *argv[]) {
int sockfd, nsize;
char buffer[BUFSIZ];
struct sockaddr_in sin;
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_port = htons(PORT);
inet_aton(HOST, &sin.sin_addr);
switch (argc) {
case 3 : sin.sin_port = htons(atoi(argv[2]));
case 2 : inet_aton(argv[1], &sin.sin_addr);
}
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
error("socket() error!");
if (connect(sockfd, (struct sockaddr *) &sin, sizeof(struct
sockaddr)) == -1)
error("connect() error!");
while ((nsize = read(0, buffer, sizeof(buffer))) > 0 )
write(sockfd, buffer, nsize);
close(sockfd);
return (0);
}
save to sendtext.c
compile with gcc -O3 -Wall -o sendtext sendtext.c
command:
sendtext [ip_address] [tcp_port_number]
if tcp_port_number was ommited, default tcp port number is 80
if ip_address was ommited, default ip address is 127.0.0.1
sample commands:
* send the file to host 1.2.3.4 with tcp port 3128
./sendtext 1.2.3.4 3128 < file
* send the contents of file to host 1.2.3.4 with tcp port 80
cat file | ./sendtext 1.2.3.4
* echo abc to host 127.0.0.1 with tcp port 80
echo "abc" | ./sendtext
you can extend the code that accepts UDP port number by replacing
SOCK_STREAM to SOCK_DGRAM... have fun!
fooler.
_________________________________________________
Philippine Linux Users' Group (PLUG) Mailing List
[email protected] (#PLUG @ irc.free.net.ph)
Read the Guidelines: http://linux.org.ph/lists
Searchable Archives: http://archives.free.net.ph
