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Full Discussion: Help with sockets in C
Top Forums Programming Help with sockets in C Post 302510111 by Corona688 on Friday 1st of April 2011 02:33:46 PM
Old 04-01-2011
Quote:
Originally Posted by omega666
i dont understand, the only times i use that str_len is when the strings have no \n inside...
That's on the server end. receive_message has no way to tell the client how long it is, so the client receives something and uses str_len, which stops at newlines.
Quote:
when the problem happens, it stops reading at the first newline that it finds, how do you make it read past it until it finds a \0 ?
It's because your str_len function stops at newlines. Just use ordinary strlen(), which doesn't.

And you have to separate your records somehow. You simply cannot depend on receiving things in the same size chunks you sent them. It can work the other way too -- you could do two small sends, and do one big receive.
 

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asn1_encode_simple_der(3)					     libtasn1						 asn1_encode_simple_der(3)

NAME
asn1_encode_simple_der - API function SYNOPSIS
#include <libtasn1.h> int asn1_encode_simple_der(unsigned int etype, const unsigned char * str, unsigned int str_len, unsigned char * tl, unsigned int * tl_len); ARGUMENTS
unsigned int etype The type of the string to be encoded (ASN1_ETYPE_) const unsigned char * str the string data. unsigned int str_len the string length unsigned char * tl the encoded tag and length unsigned int * tl_len the bytes of the tl field DESCRIPTION
Creates the DER encoding for various simple ASN.1 types like strings etc. It stores the tag and length in tl, which should have space for at least ASN1_MAX_TL_SIZE bytes. Initially tl_len should contain the size of tl. The complete DER encoding should consist of the value in tl appended with the provided str. RETURNS
ASN1_SUCCESS if successful or an error value. COPYRIGHT
Copyright (C) 2006-2013 Free Software Foundation, Inc.. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. SEE ALSO
The full documentation for libtasn1 is maintained as a Texinfo manual. If the info and libtasn1 programs are properly installed at your site, the command info libtasn1 should give you access to the complete manual. libtasn1 3.3 asn1_encode_simple_der(3)
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