1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 #ifndef lint 23 static const char copyright[] _U_ = 24 "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\ 25 The Regents of the University of California. All rights reserved.\n"; 26 #endif 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <string.h> 31 #include <stdarg.h> 32 33 #include <pcap.h> 34 35 static const char *program_name; 36 37 /* Forwards */ 38 static void error(const char *, ...); 39 40 int 41 main(int argc, char **argv) 42 { 43 const char *cp; 44 pcap_t *pd; 45 char ebuf[PCAP_ERRBUF_SIZE]; 46 int status; 47 48 if ((cp = strrchr(argv[0], '/')) != NULL) 49 program_name = cp + 1; 50 else 51 program_name = argv[0]; 52 53 if (argc != 2) { 54 fprintf(stderr, "Usage: %s <device>\n", program_name); 55 return 2; 56 } 57 58 pd = pcap_create(argv[1], ebuf); 59 if (pd == NULL) 60 error("%s", ebuf); 61 status = pcap_can_set_rfmon(pd); 62 if (status < 0) { 63 if (status == PCAP_ERROR) 64 error("%s: pcap_can_set_rfmon failed: %s", argv[1], 65 pcap_geterr(pd)); 66 else 67 error("%s: pcap_can_set_rfmon failed: %s", argv[1], 68 pcap_statustostr(status)); 69 return 1; 70 } 71 printf("%s: Monitor mode %s be set\n", argv[1], status ? "can" : "cannot"); 72 return 0; 73 } 74 75 /* VARARGS */ 76 static void 77 error(const char *fmt, ...) 78 { 79 va_list ap; 80 81 (void)fprintf(stderr, "%s: ", program_name); 82 va_start(ap, fmt); 83 (void)vfprintf(stderr, fmt, ap); 84 va_end(ap); 85 if (*fmt) { 86 fmt += strlen(fmt); 87 if (fmt[-1] != '\n') 88 (void)fputc('\n', stderr); 89 } 90 exit(1); 91 /* NOTREACHED */ 92 } 93
