1 /* $OpenBSD: printconf.c,v 1.4 2022/01/04 06:20:37 florian Exp $ */ 2 3 /* 4 * Copyright (c) 2018 Florian Obser <florian@openbsd.org> 5 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 #include <sys/queue.h> 22 #include <sys/socket.h> 23 #include <sys/uio.h> 24 25 #include <net/if.h> 26 27 #include <netinet/in.h> 28 #include <netinet/if_ether.h> 29 30 #include <arpa/inet.h> 31 32 #include <event.h> 33 #include <imsg.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <vis.h> 37 38 #include "dhcpleased.h" 39 #include "log.h" 40 41 void print_dhcp_options(char *, uint8_t *, int); 42 43 void 44 print_dhcp_options(char *indent, uint8_t *p, int len) 45 { 46 static char buf[4 * 1500 + 1]; 47 int rem, i; 48 uint8_t dho, dho_len; 49 50 rem = len; 51 52 while (rem > 0) { 53 dho = *p; 54 p += 1; 55 rem -= 1; 56 57 if (rem == 0) 58 fatal("dhcp option too short"); 59 dho_len = *p; 60 p += 1; 61 rem -= 1; 62 if (rem < dho_len) 63 fatal("dhcp option too short: %d %d", rem, dho_len); 64 65 switch (dho) { 66 case DHO_DHCP_CLASS_IDENTIFIER: 67 strvisx(buf, p, dho_len, VIS_DQ | VIS_CSTYLE); 68 p += dho_len; 69 rem -= dho_len; 70 printf("%ssend vendor class id \"%s\"\n", indent, buf); 71 break; 72 case DHO_DHCP_CLIENT_IDENTIFIER: 73 if (dho_len < 1) 74 fatal("dhcp option too short"); 75 switch (*p) { 76 case HTYPE_ETHER: 77 printf("%ssend client id \"", indent); 78 for (i = 0; i < dho_len; i++) 79 printf("%s%02x", i != 0? ":" : "", 80 *(p + i)); 81 printf("\"\n"); 82 break; 83 default: 84 strvisx(buf, p, dho_len, VIS_DQ | VIS_CSTYLE); 85 printf("%ssend client id \"%s\"\n", 86 indent, buf); 87 break; 88 } 89 p += dho_len; 90 rem -= dho_len; 91 break; 92 default: 93 fatal("unknown dhcp option: %d [%d]", *p, rem); 94 break; 95 } 96 } 97 } 98 99 void 100 print_config(struct dhcpleased_conf *conf) 101 { 102 struct iface_conf *iface; 103 int i; 104 char hbuf[INET_ADDRSTRLEN]; 105 106 SIMPLEQ_FOREACH(iface, &conf->iface_list, entry) { 107 printf("interface %s {\n", iface->name); 108 print_dhcp_options("\t", iface->c_id, iface->c_id_len); 109 if (iface->h_name != NULL) { 110 if (iface->h_name[0] == '\0') 111 printf("\tsend no host name\n"); 112 else { 113 printf("\tsend host name \"%s\"\n", 114 iface->h_name); 115 } 116 } 117 print_dhcp_options("\t", iface->vc_id, iface->vc_id_len); 118 if (iface->ignore & IGN_DNS) 119 printf("\tignore dns\n"); 120 if (iface->ignore & IGN_ROUTES) 121 printf("\tignore routes\n"); 122 for (i = 0; i < iface->ignore_servers_len; i++) { 123 if (inet_ntop(AF_INET, &iface->ignore_servers[i], 124 hbuf, sizeof(hbuf)) == NULL) 125 continue; 126 printf("\tignore %s\n", hbuf); 127 128 } 129 printf("}\n"); 130 } 131 } 132