1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright (c) 2018, Joyent, Inc. 14 */ 15 16 /* 17 * Send a raw Ethernet frame once a second to a specified MAC address. 18 */ 19 20 #include <stdio.h> 21 #include <errno.h> 22 #include <strings.h> 23 #include <unistd.h> 24 #include <stdarg.h> 25 #include <libgen.h> 26 #include <limits.h> 27 #include <stdlib.h> 28 #include <unistd.h> 29 #include <netdb.h> 30 #include <libdlpi.h> 31 #include <stddef.h> 32 #include <stdint.h> 33 #include <endian.h> 34 #include <err.h> 35 36 #include "dlsend.h" 37 38 static uint_t dlsend_sap = DLSEND_SAP; 39 static const char *dlsend_msg = DLSEND_MSG; 40 static const char *dlsend_prog; 41 42 static void 43 dlsend_usage(const char *fmt, ...) 44 { 45 if (fmt != NULL) { 46 va_list ap; 47 48 (void) fprintf(stderr, "%s: ", dlsend_prog); 49 va_start(ap, fmt); 50 (void) vfprintf(stderr, fmt, ap); 51 va_end(ap); 52 } 53 54 (void) fprintf(stderr, "Usage: %s [-s sap] device target-mac\n" 55 "\t-s sap\tspecify SAP to send on\n", 56 dlsend_prog); 57 } 58 59 int 60 main(int argc, char *argv[]) 61 { 62 int c, maclen, ret; 63 unsigned long sap; 64 char *eptr; 65 uchar_t *mac; 66 char host[MAXHOSTNAMELEN]; 67 uint_t bind_sap; 68 dlpi_handle_t dh; 69 uint64_t count; 70 71 dlsend_prog = basename(argv[0]); 72 73 while ((c = getopt(argc, argv, ":s:")) != -1) { 74 switch (c) { 75 case 's': 76 errno = 0; 77 sap = strtoul(optarg, &eptr, 10); 78 if (errno != 0 || sap == 0 || sap >= UINT16_MAX || 79 *eptr != '\0') { 80 dlsend_usage("Invalid value for sap (-s): %s\n", 81 optarg); 82 return (2); 83 } 84 dlsend_sap = sap; 85 break; 86 case ':': 87 dlsend_usage("Option -%c requires an operand\n", 88 optopt); 89 return (2); 90 case '?': 91 dlsend_usage("Unknown option: -%c\n", optopt); 92 return (2); 93 } 94 } 95 96 argc -= optind; 97 argv += optind; 98 99 if (argc != 2) { 100 dlsend_usage("missing required operands\n"); 101 return (2); 102 } 103 104 if ((mac = _link_aton(argv[1], &maclen)) == NULL) { 105 warnx("failed to convert target address %s\n", argv[1]); 106 return (1); 107 } 108 109 if (gethostname(host, sizeof (host)) != 0) { 110 warnx("failed to obtain the system hostname: %s\n", 111 strerror(errno)); 112 (void) strlcpy(host, "<unknown host>", sizeof (host)); 113 } 114 115 if ((ret = dlpi_open(argv[0], &dh, 0)) != DLPI_SUCCESS) { 116 warnx("failed to open %s: %s\n", argv[0], 117 dlpi_strerror(ret)); 118 exit(1); 119 } 120 121 if ((ret = dlpi_bind(dh, dlsend_sap, &bind_sap)) != DLPI_SUCCESS) { 122 warnx("failed to bind to sap 0x%x: %s\n", dlsend_sap, 123 dlpi_strerror(ret)); 124 exit(1); 125 } 126 127 if (bind_sap != dlsend_sap) { 128 warnx("failed to bind to requested sap 0x%x, bound to " 129 "0x%x\n", dlsend_sap, bind_sap); 130 exit(1); 131 } 132 133 count = 0; 134 for (;;) { 135 dlsend_msg_t msg; 136 137 count++; 138 bzero(&msg, sizeof (msg)); 139 msg.dm_count = htobe64(count); 140 (void) strlcpy(msg.dm_host, host, sizeof (msg.dm_host)); 141 (void) strlcpy(msg.dm_mesg, dlsend_msg, sizeof (msg.dm_mesg)); 142 ret = dlpi_send(dh, mac, maclen, &msg, sizeof (msg), NULL); 143 if (ret != DLPI_SUCCESS) { 144 warnx("failed to send message: %s\n", 145 dlpi_strerror(ret)); 146 exit(1); 147 } 148 149 (void) sleep(1); 150 } 151 152 /* LINTED: E_STMT_NOT_REACHED */ 153 return (0); 154 } 155