home *** CD-ROM | disk | FTP | other *** search
- /*
- * $Id: snit.c,v 1.1.1.1 1999/05/18 15:33:42 dugsong Exp $
- *
- * libnet
- * snit.c
- *
- * Copyright (c) 1998, 1999 Mike D. Schiffman <mike@infonexus.com>
- * route|daemon9 <route@infonexus.com>
- * All rights reserved.
- *
- * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Modifications made to accommodate the new SunOS4.0 NIT facility by
- * Micky Liu, micky@cunixc.cc.columbia.edu, Columbia University in May, 1989.
- * This module now handles the STREAMS based NIT.
- */
-
- #if (HAVE_CONFIG_H)
- #include "../include/config.h"
- #endif
- #include "../include/libnet.h"
-
- #include "../include/gnuc.h"
- #ifdef HAVE_OS_PROTO_H
- #include "../include/os-proto.h"
- #endif
-
-
- struct link_int *
- open_link_interface(char *device, char *ebuf)
- {
- struct strioctl si; /* struct for ioctl() */
- struct ifreq ifr; /* interface request struct */
- static char dev[] = "/dev/nit";
- register struct link_int *l;
-
- l = (struct link_int *)malloc(sizeof(*l));
- if (l == NULL)
- {
- strcpy(ebuf, ll_strerror(errno));
- return (NULL);
- }
-
- memset(l, 0, sizeof(*l));
-
- l->fd = open(dev, O_RDWR);
- if (l->fd < 0)
- {
- sprintf(ebuf, "%s: %s", dev, ll_strerror(errno));
- goto bad;
- }
-
- /*
- * arrange to get discrete messages from the STREAM and use NIT_BUF
- */
- if (ioctl(l->fd, I_SRDOPT, (char *)RMSGD) < 0)
- {
- sprintf(ebuf, "I_SRDOPT: %s", ll_strerror(errno));
- goto bad;
- }
- if (ioctl(l->fd, I_PUSH, "nbuf") < 0)
- {
- sprintf(ebuf, "push nbuf: %s", ll_strerror(errno));
- goto bad;
- }
- /*
- * request the interface
- */
- strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
- ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' ';
- si.ic_cmd = NIOCBIND;
- si.ic_len = sizeof(ifr);
- si.ic_dp = (char *)𝔦
- if (ioctl(l->fd, I_STR, (char *)&si) < 0)
- {
- sprintf(ebuf, "NIOCBIND: %s: %s", ifr.ifr_name, ll_strerror(errno));
- goto bad;
- }
-
- ioctl(l->fd, I_FLUSH, (char *)FLUSHR);
- /*
- * NIT supports only ethernets.
- */
- l->linktype = DLT_EN10MB;
-
- return (l);
- bad:
- if (l->fd >= 0)
- {
- close(l->fd);
- }
- free(l);
- return (NULL);
- }
-
-
- int
- close_link_interface(struct link_int *l)
- {
- return (close(l->fd));
- }
-
-
- int
- write_link_layer(struct link_int *l, const u_char *device, const u_char *buf,
- int len)
- {
- int c;
- struct sockaddr sa;
-
- memset(&sa, 0, sizeof(sa));
- strncpy(sa.sa_data, device, sizeof(sa.sa_data));
-
- c = sendto(l->fd, buf, len, 0, &sa, sizeof(sa));
- if (c != len)
- {
- #if (__DEBUG)
- fprintf(stderr, "write_link_layer: %d bytes written (%s)\n", c,
- strerror(errno));
- #endif
- }
- return (c);
- }
-