Ok. Thanks. So, here SSL_write( ) wants to read( ). In fact, ssl_accept( ) fails ( but I continued instead of returning -1 for example. I repaired this programming error. Now it's OK ). -- Then I realize that ssl_accept returns ***ret = 0. * -- I check if ret < 1. If true then I make : gret = SSL_get_error(ssl, ret) -- Then, I make a switch(gret) and I realize that gret = *SSL_ERROR_SYSCALL * -- Then, I make ERR_get_error(); it returns 0. According to the doc ( http://www.openssl.org/docs/ssl/SSL_get_error.html#RETURN_VALUES) I can recheck *ret* value. If it is == 0 it says that "an EOF was observed that violates the protocol".
My questions : 1) Did I well interpreted the doc ? 2) What does "an EOF was observed that violates the protocol" mean ? 3) I come back to the SSL_write( ). He wants to read( ). The doc says : " Caveat: Any TLS/SSL I/O function can lead to either of * SSL_ERROR_WANT_READ* and *SSL_ERROR_WANT_WRITE*. In particular, SSL_read()or SSL_peek() may want to write data and SSL_write() may want to read data. This is mainly because TLS/SSL handshakes may occur at any time during the protocol (initiated by either the client or the server); SSL_read(), SSL_peek(), and SSL_write() will handle any pending handshakes. " 3.1) When the doc says "SSL_write () may want to read data"... what does it mean exactly ? Does it mean that a function is blocked somewhere because it wants read ? ( In my case : this function is accept( ) ?? ) 3.2) Does the client and server share the same ssl object ... ? Thanks. 2011/3/2 lzyzizi <lzyz...@126.com> > If you stepped a bit into the source code , you would have found the answer > yourself. > > They are defined in the ssl.h.You may see the help doc for more details. > #define SSL_ERROR_NONE 0 > #define SSL_ERROR_SSL 1 > #define SSL_ERROR_WANT_READ 2 > #define SSL_ERROR_WANT_WRITE 3 > #define SSL_ERROR_WANT_X509_LOOKUP 4 > #define SSL_ERROR_SYSCALL 5 /* look at error stack/return > value/errno */ > #define SSL_ERROR_ZERO_RETURN 6 > #define SSL_ERROR_WANT_CONNECT 7 > #define SSL_ERROR_WANT_ACCEPT 8 > > > At 2011-03-02 22:55:51，ikuzar <razuk...@gmail.com> wrote: > > Hello, > SSL_write fails in my program. After debuging, I have got err = 2 in err = > SSL_get_error(ssl, err); > Does someone know what does it mean ? > Thanks. > > > >
