Hi Dinh Thao,
thank you very much for your reply. I have no more problem with
linking.
but now I have problem when I compile file client.c and common.c:
[EMAIL PROTECTED]:~/SSL-connection$ gcc client.c -o client -Wall -lcrypto
-lssl -lpthread
/tmp/ccUugnSm.o: In function `main':
client.c:(.text+0xcb): undefined reference to `init_OpenSSL'
client.c:(.text+0xfc): undefined reference to `handle_error'
client.c:(.text+0x13f): undefined reference to `handle_error'
collect2: ld returned 1 exit status
Can you tell me where is problem?
Thanks, Minh.
====================
Here ist relevant code:
common.h================
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#include <openssl/x509v3.h>
#ifndef WIN32
#include <pthread.h>
#define THREAD_CC
#define THREAD_TYPE pthread_t
#define THREAD_CREATE(tid, entry, arg) pthread_create(&(tid), NULL, \
(entry), (arg))
#else
#include <windows.h>
#define THREAD_CC __cdecl
#define THREAD_TYPE DWORD
#define THREAD_CREATE(tid, entry, arg) do { _beginthread((entry), 0,
(arg));\
(tid) =
GetCurrentThreadId(); \
} while (0)
#endif
#define PORT "6001"
#define SERVER "splat.zork.org"
#define CLIENT "shell.zork.org"
#define int_error(msg) handle_error(__FILE__, __LINE__, msg)
void handle_error(const char *file, int lineno, const char *msg);
void init_OpenSSL(void);
common.c==========
#include "common.h"
void handle_error(const char *file, int lineno, const char *msg)
{
fprintf(stderr, "** %s:%i %s\n", file, lineno, msg);
ERR_print_errors_fp(stderr);
exit(-1);
}
void init_OpenSSL(void)
{
if (!SSL_library_init())
{
fprintf(stderr, "** OpenSSL initialization failed!\n");
exit(-1);
}
SSL_load_error_strings();
}
client.c============
#include "common.h"
void do_client_loop(BIO *conn)
{
int err, nwritten;
char buf[80];
for (;;)
{
if (!fgets(buf, sizeof(buf), stdin))
break;
for (nwritten = 0; nwritten < sizeof(buf); nwritten += err)
{
err = BIO_write(conn, buf + nwritten, strlen(buf) -
nwritten);
if (err <= 0)
return;
}
}
}
int main(int argc, char *argv[])
{
BIO *conn;
init_OpenSSL();
conn = BIO_new_connect(SERVER ":" PORT);
if (!conn)
int_error("Error creating connection BIO");
if (BIO_do_connect(conn) <= 0)
int_error("Error connecting to remote machine");
fprintf(stderr, "Connection opened\n");
do_client_loop(conn);
fprintf(stderr, "Connection closed\n");
BIO_free(conn);
return 0;
}
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