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/*++
/* NAME
/* recv_pass_attr 3
/* SUMMARY
/* predicate if string is all numerical
/* SYNOPSIS
/* #include <listen.h>
/*
/* int recv_pass_attr(fd, attr, timeout, bufsize)
/* int fd;
/* HTABLE **attr;
/* int timeout;
/* ssize_t bufsize;
/* DESCRIPTION
/* recv_pass_attr() receives named attributes over the specified
/* descriptor. The result value is zero for success, -1 for error.
/*
/* Arguments:
/* .IP fd
/* The file descriptor to read from.
/* .IP attr
/* Pointer to attribute list pointer. The target is set to
/* zero on error or when the received attribute list is empty,
/* otherwise it is assigned a pointer to non-empty attribute
/* list.
/* .IP timeout
/* The deadline for receiving all attributes.
/* .IP bufsize
/* The read buffer size. Specify 1 to avoid reading past the
/* end of the attribute list.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
/* Utility library. */
#include <iostuff.h>
#include <htable.h>
#include <vstream.h>
#include <attr.h>
#include <mymalloc.h>
#include <listen.h>
/* recv_pass_attr - receive connection attributes */
int recv_pass_attr(int fd, HTABLE **attr, int timeout, ssize_t bufsize)
{
VSTREAM *fp;
int stream_err;
/*
* Set up a temporary VSTREAM to receive the attributes.
*
* XXX We use one-character reads to simplify the implementation.
*/
fp = vstream_fdopen(fd, O_RDWR);
vstream_control(fp,
CA_VSTREAM_CTL_BUFSIZE(bufsize),
CA_VSTREAM_CTL_TIMEOUT(timeout),
CA_VSTREAM_CTL_START_DEADLINE,
CA_VSTREAM_CTL_END);
stream_err = (attr_scan(fp, ATTR_FLAG_NONE,
ATTR_TYPE_HASH, *attr = htable_create(1),
ATTR_TYPE_END) < 0
|| vstream_feof(fp) || vstream_ferror(fp));
vstream_fdclose(fp);
/*
* Error reporting and recovery.
*/
if (stream_err) {
htable_free(*attr, myfree);
*attr = 0;
return (-1);
} else {
if ((*attr)->used == 0) {
htable_free(*attr, myfree);
*attr = 0;
}
return (0);
}
}
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