multithread calls libssh2_session_handshake,error,return -13

[xingzhiming]

hi,all 
When using multiple threads, in libssh2_session_handshake abnormal. 
 If you do not multi-threaded, no problem.  How to use multi-thread calls 
libssh2?

source code:

#include "libssh2_config.h"
#include <libssh2.h>
#include <libssh2_sftp.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <arpa/inet.h>

#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#include <pthread.h>
#ifndef __PRI64_PREFIX
#ifdef WIN32
#define __PRI64_PREFIX "I64"
#else
#if __WORDSIZE == 64
#define __PRI64_PREFIX "l"
#else
#define __PRI64_PREFIX "ll"
#endif  
#endif  
#endif  
#ifndef PRIu64
#define PRIu64 __PRI64_PREFIX "u"
#endif 
void* work_thread(void* arg) 
{
    unsigned long hostaddr;
    int sock, i, auth_pw = 1;
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
    const char *username="ctst";
    const char *password="ctst";
    const char *sftppath="/home/ctst/xzm";
    int rc;
    LIBSSH2_SFTP *sftp_session;
#ifdef WIN32
    WSADATA wsadata;

    WSAStartup(MAKEWORD(2,0), &wsadata);
#endif

    hostaddr = inet_addr("172.168.1.224");
    rc = libssh2_init (0);
printf("libssh2_init..........\n") ;
    if (rc != 0) {
        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
    }

    /*
     * The application code is responsible for creating the socket
     * and establishing the connection
     */ 
    sock = socket(AF_INET, SOCK_STREAM, 0);

    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
    if (connect(sock, (struct sockaddr*)(&sin),
            sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
    }

    /* Create a session instance
     */ 
    session = libssh2_session_init();
    if(!session)
printf("libssh2_session_init..........\n") ;
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */ 
 printf("sock=%d\n", sock) ;
    rc = libssh2_session_handshake(session, sock);
printf("libssh2_session_handshake..........\n") ;
    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
return NULL ;
    }
printf("libssh2_session_handshake....success......\n") ;
    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for 
playing");
    libssh2_session_free(session);

#ifdef WIN32
    closesocket(sock);
#else
    close(sock);
#endif
    fprintf(stderr, "all done\n");

    libssh2_exit();
return NULL ;
}
int main(int argc, char** argv)
{
int nthread = 1; 
pthread_t tid; 
printf("in main..........\n") ;
for(int i=0;i<nthread;i++) 
{ 
pthread_create(&tid,NULL,work_thread,NULL); 
} 
for(int i=0; i<nthread;i++) 
{
pthread_join(tid, NULL) ;
}
//work_thread(NULL) ;//normal
return 0 ;
}



2014-02-12 11:08:38




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