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Annotation of embedaddon/libnet/src/libnet_link_nit.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  *  $Id: libnet_link_nit.c,v 1.6 2004/01/03 20:31:02 mike Exp $
                      3:  *
                      4:  *  libnet
                      5:  *  libnet_nit.c - network interface tap routines
                      6:  *
                      7:  *  Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
                      8:  *  All rights reserved.
                      9:  *
                     10:  * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
                     11:  *     The Regents of the University of California.  All rights reserved.
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that: (1) source code distributions
                     15:  * retain the above copyright notice and this paragraph in its entirety, (2)
                     16:  * distributions including binary code include the above copyright notice and
                     17:  * this paragraph in its entirety in the documentation or other materials
                     18:  * provided with the distribution, and (3) all advertising materials mentioning
                     19:  * features or use of this software display the following acknowledgement:
                     20:  * ``This product includes software developed by the University of California,
                     21:  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
                     22:  * the University nor the names of its contributors may be used to endorse
                     23:  * or promote products derived from this software without specific prior
                     24:  * written permission.
                     25:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     26:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     27:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     28:  */
                     29: 
                     30: #if (HAVE_CONFIG_H)
                     31: #include "../include/config.h"
                     32: #endif
                     33: #if (!(_WIN32) || (__CYGWIN__)) 
                     34: #include "../include/libnet.h"
                     35: #else
                     36: #include "../include/win32/libnet.h"
                     37: #endif
                     38: 
                     39: #include "../include/gnuc.h"
                     40: #ifdef HAVE_OS_PROTO_H
                     41: #include "../include/os-proto.h"
                     42: #endif
                     43: 
                     44: struct libnet_link_int *
                     45: libnet_open_link_interface(int8_t *device, int8_t *ebuf)
                     46: {
                     47:     struct sockaddr_nit snit;
                     48:     register struct libnet_link_int *l;
                     49: 
                     50:     l = (struct libnet_link_int *)malloc(sizeof(*p));
                     51:     if (l == NULL)
                     52:     {
                     53:         strcpy(ebuf, strerror(errno));
                     54:         return (NULL);
                     55:     }
                     56: 
                     57:     memset(l, 0, sizeof(*l));
                     58: 
                     59:     l->fd = socket(AF_NIT, SOCK_RAW, NITPROTO_RAW);
                     60:     if (l->fd < 0)
                     61:     {
                     62:         sprintf(ebuf, "socket: %s", strerror(errno));
                     63:         goto bad;
                     64:     }
                     65:     snit.snit_family = AF_NIT;
                     66:        strncpy(snit.snit_ifname, device, NITIFSIZ -1);
                     67:     snit.snit_ifname[NITIFSIZ] = '\0';
                     68: 
                     69:     if (bind(l->fd, (struct sockaddr *)&snit, sizeof(snit)))
                     70:     {
                     71:         sprintf(ebuf, "bind: %s: %s", snit.snit_ifname, strerror(errno));
                     72:         goto bad;
                     73:     }
                     74: 
                     75:     /*
                     76:      * NIT supports only ethernets.
                     77:      */
                     78:     l->linktype = DLT_EN10MB;
                     79: 
                     80:     return (l);
                     81: 
                     82: bad:
                     83:     if (l->fd >= 0)
                     84:     {
                     85:         close(l->fd);
                     86:     }
                     87:     free(l);
                     88:     return (NULL);
                     89: }
                     90: 
                     91: 
                     92: int
                     93: libnet_close_link_interface(struct libnet_link_int *l)
                     94: {
                     95:     if (close(l->fd) == 0)
                     96:     {
                     97:         free(l);
                     98:         return (1);
                     99:     }
                    100:     else
                    101:     {
                    102:         free(l);
                    103:         return (-1);
                    104:     }
                    105: }
                    106: 
                    107: 
                    108: int
                    109: write_link_layer(struct libnet_link_int *l, const int8_t *device,
                    110:             u_int8_t *buf, int len)
                    111: {
                    112:     int c;
                    113:     struct sockaddr sa;
                    114: 
                    115:     memset(&sa, 0, sizeof(sa));
                    116:     strncpy(sa.sa_data, device, sizeof(sa.sa_data));
                    117: 
                    118:     c = sendto(l->fd, buf, len, 0, &sa, sizeof(sa));
                    119:     if (c != len)
                    120:     {
                    121:         /* error */
                    122:     }
                    123:     return (c);
                    124: }
                    125: