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 #include "varattrs.h" 23 24 #ifndef lint 25 static const char copyright[] _U_ = 26 "@(#) Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000\n\ 27 The Regents of the University of California. All rights reserved.\n"; 28 #endif 29 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <stdarg.h> 34 35 #include <pcap.h> 36 37 #include "pcap/funcattrs.h" 38 39 static const char *program_name; 40 41 /* Forwards */ 42 static void PCAP_NORETURN error(PCAP_FORMAT_STRING(const char *), ...) PCAP_PRINTFLIKE(1,2); 43 44 int 45 main(int argc, char **argv) 46 { 47 const char *cp; 48 pcap_t *pd; 49 char ebuf[PCAP_ERRBUF_SIZE]; 50 int status; 51 52 if ((cp = strrchr(argv[0], '/')) != NULL) 53 program_name = cp + 1; 54 else 55 program_name = argv[0]; 56 57 if (argc != 2) { 58 fprintf(stderr, "Usage: %s <device>\n", program_name); 59 return 2; 60 } 61 62 pd = pcap_create(argv[1], ebuf); 63 if (pd == NULL) 64 error("%s", ebuf); 65 status = pcap_can_set_rfmon(pd); 66 if (status < 0) { 67 if (status == PCAP_ERROR) 68 error("%s: pcap_can_set_rfmon failed: %s", argv[1], 69 pcap_geterr(pd)); 70 else 71 error("%s: pcap_can_set_rfmon failed: %s", argv[1], 72 pcap_statustostr(status)); 73 } 74 printf("%s: Monitor mode %s be set\n", argv[1], status ? "can" : "cannot"); 75 return 0; 76 } 77 78 /* VARARGS */ 79 static void 80 error(const char *fmt, ...) 81 { 82 va_list ap; 83 84 (void)fprintf(stderr, "%s: ", program_name); 85 va_start(ap, fmt); 86 (void)vfprintf(stderr, fmt, ap); 87 va_end(ap); 88 if (*fmt) { 89 fmt += strlen(fmt); 90 if (fmt[-1] != '\n') 91 (void)fputc('\n', stderr); 92 } 93 exit(1); 94 /* NOTREACHED */ 95 } 96