Revision a520723f29aac6598ff0d69e34f5e9b88213e511 authored by Matt Caswell on 14 October 2016, 12:07:00 UTC, committed by Matt Caswell on 28 October 2016, 08:43:41 UTC
The previous commit inspired a review of all the length checks for the extension adding code. This adds more robust checks and adds checks where some were missing previously. The real solution for this is to use WPACKET which is currently in master - but that cannot be applied to release branches. Reviewed-by: Rich Salz <rsalz@openssl.org>
1 parent 83a1d4b
BIO_s_socket.pod
=pod
=head1 NAME
BIO_s_socket, BIO_new_socket - socket BIO
=head1 SYNOPSIS
#include <openssl/bio.h>
BIO_METHOD *BIO_s_socket(void);
long BIO_set_fd(BIO *b, int fd, long close_flag);
long BIO_get_fd(BIO *b, int *c);
BIO *BIO_new_socket(int sock, int close_flag);
=head1 DESCRIPTION
BIO_s_socket() returns the socket BIO method. This is a wrapper
round the platform's socket routines.
BIO_read() and BIO_write() read or write the underlying socket.
BIO_puts() is supported but BIO_gets() is not.
If the close flag is set then the socket is shut down and closed
when the BIO is freed.
BIO_set_fd() sets the socket of BIO B<b> to B<fd> and the close
flag to B<close_flag>.
BIO_get_fd() places the socket in B<c> if it is not NULL, it also
returns the socket. If B<c> is not NULL it should be of type (int *).
BIO_new_socket() returns a socket BIO using B<sock> and B<close_flag>.
=head1 NOTES
Socket BIOs also support any relevant functionality of file descriptor
BIOs.
The reason for having separate file descriptor and socket BIOs is that on some
platforms sockets are not file descriptors and use distinct I/O routines,
Windows is one such platform. Any code mixing the two will not work on
all platforms.
BIO_set_fd() and BIO_get_fd() are macros.
=head1 RETURN VALUES
BIO_s_socket() returns the socket BIO method.
BIO_set_fd() always returns 1.
BIO_get_fd() returns the socket or -1 if the BIO has not been
initialized.
BIO_new_socket() returns the newly allocated BIO or NULL is an error
occurred.
=head1 SEE ALSO
TBA

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