265.htm

unix高级编程原吗

        close( rsock ); <br>
        return 0; <br>
    } <br>
    rhost.sin_family = AF_INET; <br>
    memcpy( &rhost.sin_addr, hp->h_addr, hp->h_length ); <br>
    rhost.sin_port = htons( rport ); <br>

    printf( "connect to port: #%d\n", rport ); <br>
    if ( connect(rsock, (struct sockaddr *) &rhost, sizeof(rhost) ) < 0 ) <br>
    { <br>
        printf( "***connect failure.\n" ); <br>
        write( ms, cnmsg, strlen( cnmsg ) ); <br>
        close( rsock ); <br>
        return 0; <br>
    } <br>
    printf( "connected successfully.\n" ); <br>
    len = read( rsock, rbuf, 1024 ); rbuf[len] = '\0'; <br>
    printf( rbuf ); <br>
    while( strstr( rbuf, "220 ") == NULL ) <br>
    { <br>
        len = read( rsock, rbuf, 1024 ); rbuf[len] = '\0'; <br>
        printf( rbuf ); <br>
    } <br>
    write( rsock, "USER ftp\n", 9 ); <br>
    printf( "USER ftp sent.\n" ); <br>
    len = read( rsock, rbuf, sizeof( rbuf ) ); rbuf[len] = '\0'; <br>
    printf( rbuf ); <br>
    if ( memcmp( rbuf, "331 ", 4 ) == 0 ) <br>
    { <br>
    { <br>
        write( rsock, "PASS guest@\n", 12 ); <br>
        len = read( rsock, rbuf, sizeof( rbuf ) );rbuf[len] = '\0'; <br>
    } <br>
    tok = "230 "; <br>
    ca = strstr( buffer, " HTTP/1.0" ); <br>
    len = ca - buffer - 10 - strlen( tmp ) ; <br>
    ca = buffer + 10 + strlen( tmp ); <br>
    memcpy( tmp, ca, len ); <br>
    tmp[len]='\0'; <br>
    if ( len > 0 ) <br>
    { <br>
        while( memcmp( rbuf, "230 ", 4 ) != 0 && strstr(rbuf,"\n230 ") == NU <br>
LL ) <br>
        { <br>
            len =read( rsock, rbuf, sizeof( rbuf )); <br>
            rbuf[len] = '\0'; <br>
        } <br>
        tok = "250 "; <br>
        sprintf( buffer, "CWD %s\n", tmp ); <br>
        printf( buffer ); <br>
        write( rsock, buffer, strlen( buffer ) ); <br>
        len = read( rsock, rbuf, sizeof( rbuf ) ); rbuf[len] = '\0'; <br>

    } <br>
    if ( memcmp( rbuf, "550 ", 4 ) == 0 ) <br>
    { <br>
        int data1; <br>
        char temp[40]; <br>
    /* get file */ <br>
        ca = strrchr( tmp, '/' ); <br>
        strcpy( temp, ca+1 ); <br>
        *(ca +1) = '\0'; <br>
        sprintf( buffer, "CWD %s\n", tmp ); <br>
        printf( buffer ); <br>
        write( rsock, buffer, strlen( buffer )); <br>
        len = read( rsock, rbuf, sizeof( rbuf ));rbuf[len]='\0'; <br>
        printf( rbuf ); <br>
        while( strstr( rbuf, "250 " ) == NULL) <br>
        { <br>
            len = read( rsock, rbuf, sizeof( rbuf)); <br>
            rbuf[len] = '\0'; <br>
        } <br>
        write( rsock, "TYPE I\n", 7 ); <br>
        read( rsock, rbuf, sizeof( rbuf) ); <br>
        initconn( rsock ); <br>

        sprintf( buffer, "RETR %s\n", temp ); <br>
        printf( buffer ); <br>
        write( rsock, buffer, strlen( buffer) ); <br>
        read( rsock, rbuf, sizeof( rbuf ) ); <br>
        printf( rbuf ); <br>
        if ( memcmp( rbuf, "550 ", 4 ) != 0 ) <br>
        { <br>
        data1 = accept( data, (struct sockaddr *)NULL, (int * )NULL ); <br>
        l = 0; <br>
        do <br>
        { <br>
            memset( rbuf, 0, sizeof( rbuf) ); <br>
            if (( len = read( data1, rbuf, sizeof( rbuf) )) < 0) <br>
                puts( "Error in read stream message." ); <br>
            else if ( len == 0 ) <br>
                puts( "\n[ftp : end of connection.]\n" ); <br>
            else <br>
            { <br>
                write( ms, rbuf, len ); <br>
                l += len; <br>
                printf( "%d - Received bytes : %ld\n", count, l ); <br>
            } <br>
            } <br>
        } while( len != 0 ); <br>
        close( data1 ); <br>
        } <br>
        close( data ); <br>
    } <br>
    else <br>
    { <br>
    /* list directory */ <br>
        int data1; <br>
        char temp[40]; <br>
        if ( tmp[0] == '\0' ) strcpy( tmp, "/" ); <br>
        sprintf( temp, "<TITLE>FTP Catalog of %s</TITLE>\n", tmp ); <br>
        write( ms, temp, strlen( temp )); <br>
        sprintf( temp, "<H2>Directory of %s</H2><PRE><HR>", <br>
                 tmp ); <br>
        write( ms, temp, strlen( temp ) ); <br>
        if ( memcmp( rbuf, tok, 4) != 0 ) <br>
        { <br>
            len = strlen( rbuf ); rbuf[len] = '\0'; <br>
            sprintf( tmp, "\n%s", tok ); <br>
            while( memcmp( rbuf, tok, 4) != 0 && strstr(rbuf,tmp) == NULL) <br>
            { <br>
            { <br>
                write( ms, rbuf, len ); <br>
                len = read( rsock, rbuf, sizeof( rbuf ) );rbuf[len] = '\0'; <br>
            } <br>
            write( ms, rbuf, len ); <br>
            write( ms, "<HR>\n", 5 ); <br>
        } <br>
        write( rsock, "TYPE A\n", 7 ); <br>
        len = read( rsock, rbuf, sizeof( rbuf) ); rbuf[len] = '\0'; <br>
        printf( rbuf ); <br>
        initconn( rsock ); <br>
        write( rsock, "LIST\n", 5 ); <br>
        len = read( rsock, rbuf, sizeof( rbuf) ); rbuf[len] = '\0'; <br>
        printf( rbuf ); <br>
        if ( memcmp( rbuf, "550 ", 4 ) != 0 ) <br>
        { <br>
            data1 = accept( data, (struct sockaddr *)NULL, (int * )NULL ); <br>
            do <br>
            { <br>
                memset( rbuf, 0, sizeof( rbuf) ); <br>
                if (( len = read( data1, rbuf, sizeof( rbuf) )) < 0) <br>
                    puts( "Error in read stream message." ); <br>
                else if ( len == 0 ) <br>

                    puts( "\n[ftp : end of connection.]\n" ); <br>
                else <br>
                { <br>
                    printf( rbuf ); <br>
                    write( ms, rbuf, len ); <br>
                } <br>
            } while( len != 0 ); <br>
            write( ms, "</PRE>", 6 ); <br>
            close( data1 ); <br>
        } <br>
        close( data ); <br>
    } <br>
    write( rsock, "QUIT\n", 5 ); <br>
    len=read( rsock, rbuf, sizeof( rbuf )); rbuf[len] = '\0'; <br>
    printf( rbuf ); <br>
    close( rsock ); <br>
    return 0; <br>
} <br>
int processsock( int ms, char * buffer ) <br>
{ <br>
    if ( memcmp( buffer, "GET http://", 11 ) == 0 && <br>
         strstr( buffer, "Proxy-Connection: ") != NULL ) <br>

    { <br>
        return http_proxy( ms, buffer ); <br>
    } <br>
    else if ( memcmp( buffer, "POST http://", 12 ) == 0 && <br>
         strstr( buffer, "Proxy-Connection: ") != NULL ) <br>
    { <br>
        return http_proxy( ms, buffer ); <br>
    } <br>
    else if ( memcmp( buffer, "GET ftp://", 10 ) == 0 && <br>
         strstr( buffer, "Proxy-Connection: ") != NULL ) <br>
    { <br>
        return ftp_proxy( ms, buffer ); <br>
    } <br>
    else /* unknown service, just echo */ <br>
    { <br>
        printf( "%s", buffer ); <br>
        write( ms, buffer, strlen( buffer ) ); <br>
    } <br>
    return 1; <br>
} <br>
int main( int argc, char * argv[] ) <br>
{ <br>
{ <br>
    int sock, portnum, length; <br>
    struct sockaddr_in server; <br>
    struct sockaddr_in peername; <br>
    int msgsock, rval ; <br>
    printf( "Hu's MiniProxy ver 1.15 (c)Copyright 1996 Hu Qiwei, Tsinghua Un <br>
iv.\ <br>
n" ); <br>
    if ( argc > 1 ) <br>
    { <br>
        portnum = atoi( argv[1] ); <br>
        if (portnum < 80) portnum = 80; <br>
    } <br>
    else <br>
    { <br>
        printf( "USAGE : proxy [portnum]\n" ); <br>
      /*  exit( 2 ); <br>
*/ <br>
        portnum=8787; <br>
    } <br>
    signal( SIGCLD, SIG_IGN ); <br>
    sock = socket( AF_INET, SOCK_STREAM, 0 ); <br>
    if ( sock < 0 ) <br>

    { <br>
        puts( "Error in create socket!" ); <br>
        exit( 1 ); <br>
    } <br>
    server.sin_family = AF_INET; <br>
    server.sin_addr.s_addr = INADDR_ANY; <br>
    server.sin_port = htons(portnum); <br>
    if ( bind( sock, (struct sockaddr *)&server, sizeof( server ) ) < 0 ) <br>
    { <br>
        puts( "Error in bind stream." ); <br>
        exit( 1 ); <br>
    } <br>
    length = sizeof( server ); <br>
    if ( getsockname( sock, (struct sockaddr * )&server, &length ) < 0 ) <br>
    { <br>
        puts( "Error in get sock name!" ); <br>
        exit( 1 ); <br>
    } <br>
    printf( "The socket port number has been assigned to #%d\n\n", <br>
            ntohs( server.sin_port ) ); <br>
    listen( sock, 20 ); <br>
    while( 1 ) <br>
    while( 1 ) <br>
    { <br>
    msgsock = accept( sock, (struct sockaddr *)NULL, (int * )NULL ); <br>
    if ( msgsock == -1 ) <br>
        { <br>
            puts( "Error in accept!" ); <br>
            exit( 1 ); <br>
        } <br>
    else <br>
        if ( fork() == 0 ) <br>
        { <br>
            length = sizeof ( peername ); <br>
            getpeername(msgsock, (struct sockaddr *)&peername, &length ); <br>
            printf( "##[%d - Connected to client: %s]\n\n", count, <br>
                    inet_ntoa( peername.sin_addr ) ); <br>
            do <br>
            { <br>
                memset( buf, 0, 1024 ); <br>
                if (( rval = read( msgsock, buf, 1024 )) < 0) <br>
                    puts( "Error in read stream message." ); <br>
                else if ( rval == 0 ) <br>
                    puts( "\n[End of connection.]\n" ); <br>
                else <br>

                { <br>
                    rval = processsock( msgsock, buf ); <br>
                } <br>
            } while( rval != 0 ); <br>
            printf( "##[%d - Shutdown connection to client: %s]\n\n", count, <br>
  <br>
                   inet_ntoa(peername.sin_addr) ); <br>
            shutdown( msgsock, 2 ); <br>
            _exit( 0 ); <br>
        } <br>
        printf( "Service #%d resolved.\n", count++ ); <br>
        close( msgsock ); <br>
    }; <br>
    exit( 0 ); <br>
} <br>
-- <br>
※ 修改:·zinger 於 Nov 13 20:53:33 修改本文·[FROM:   210.34.11.167] <br>
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