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/*++
/* NAME
/* pass_accept 3
/* SUMMARY
/* start UNIX-domain file descriptor listener
/* SYNOPSIS
/* #include <listen.h>
/*
/* int pass_accept(listen_fd)
/* int listen_fd;
/*
/* int pass_accept_attr(listen_fd, attr)
/* int listen_fd;
/* HTABLE **attr;
/* DESCRIPTION
/* This module implements a listener that receives one attribute list
/* and file descriptor over each a local connection that is made to it.
/*
/* Arguments:
/* .IP attr
/* Pointer to attribute list pointer. In case of error, or
/* no attributes, the attribute list pointer is set to null.
/* .IP listen_fd
/* File descriptor returned by LOCAL_LISTEN().
/* DIAGNOSTICS
/* Warnings: I/O errors, timeout.
/* 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
/*--*/
/* System library. */
#include <sys_defs.h>
#include <errno.h>
#include <unistd.h>
/* Utility library. */
#include <msg.h>
#include <listen.h>
#include <attr.h>
#define PASS_ACCEPT_TMOUT 100
/* pass_accept - accept descriptor */
int pass_accept(int listen_fd)
{
const char *myname = "pass_accept";
int accept_fd;
int recv_fd = -1;
accept_fd = LOCAL_ACCEPT(listen_fd);
if (accept_fd < 0) {
if (errno != EAGAIN)
msg_warn("%s: cannot accept connection: %m", myname);
return (-1);
} else {
if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0)
msg_warn("%s: timeout receiving file descriptor: %m", myname);
else if ((recv_fd = LOCAL_RECV_FD(accept_fd)) < 0)
msg_warn("%s: cannot receive file descriptor: %m", myname);
if (close(accept_fd) < 0)
msg_warn("%s: close: %m", myname);
return (recv_fd);
}
}
/* pass_accept_attr - accept descriptor and attribute list */
int pass_accept_attr(int listen_fd, HTABLE **attr)
{
const char *myname = "pass_accept_attr";
int accept_fd;
int recv_fd = -1;
*attr = 0;
accept_fd = LOCAL_ACCEPT(listen_fd);
if (accept_fd < 0) {
if (errno != EAGAIN)
msg_warn("%s: cannot accept connection: %m", myname);
return (-1);
} else {
if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0)
msg_warn("%s: timeout receiving file descriptor: %m", myname);
else if ((recv_fd = LOCAL_RECV_FD(accept_fd)) < 0)
msg_warn("%s: cannot receive file descriptor: %m", myname);
else if (read_wait(accept_fd, PASS_ACCEPT_TMOUT) < 0
|| recv_pass_attr(accept_fd, attr, PASS_ACCEPT_TMOUT, 0) < 0) {
msg_warn("%s: cannot receive connection attributes: %m", myname);
if (close(recv_fd) < 0)
msg_warn("%s: close: %m", myname);
recv_fd = -1;
}
if (close(accept_fd) < 0)
msg_warn("%s: close: %m", myname);
return (recv_fd);
}
}
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