1 /* $OpenBSD: print-rt6.c,v 1.10 2022/12/28 21:30:19 jmc Exp $ */ 2 3 4 /* 5 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that: (1) source code distributions 10 * retain the above copyright notice and this paragraph in its entirety, (2) 11 * distributions including binary code include the above copyright notice and 12 * this paragraph in its entirety in the documentation or other materials 13 * provided with the distribution, and (3) all advertising materials mentioning 14 * features or use of this software display the following acknowledgement: 15 * ``This product includes software developed by the University of California, 16 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 17 * the University nor the names of its contributors may be used to endorse 18 * or promote products derived from this software without specific prior 19 * written permission. 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 21 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 23 */ 24 25 #include <sys/time.h> 26 #include <sys/types.h> 27 #include <sys/socket.h> 28 29 #include <net/if.h> 30 31 #include <netinet/in.h> 32 #include <netinet/if_ether.h> 33 #include <netinet/ip.h> 34 #include <netinet/ip_icmp.h> 35 #include <netinet/ip_var.h> 36 #include <netinet/udp.h> 37 #include <netinet/udp_var.h> 38 #include <netinet/tcp.h> 39 40 #include <stdio.h> 41 42 #include <netinet/ip6.h> 43 44 #include "interface.h" 45 #include "addrtoname.h" 46 47 int 48 rt6_print(const u_char *bp, const u_char *bp2) 49 { 50 const struct ip6_rthdr *dp; 51 const struct ip6_rthdr0 *dp0; 52 const u_char *ep; 53 int i, len; 54 55 dp = (struct ip6_rthdr *)bp; 56 len = dp->ip6r_len; 57 58 /* 'ep' points to the end of available data. */ 59 ep = snapend; 60 61 #if 0 62 printf("%s > %s: ", 63 ip6addr_string(&ip->ip6_src), 64 ip6addr_string(&ip->ip6_dst)); 65 #endif 66 67 TCHECK(dp->ip6r_segleft); 68 69 printf("srcrt (len=%d, ", dp->ip6r_len); 70 printf("type=%d, ", dp->ip6r_type); 71 printf("segleft=%d", dp->ip6r_segleft); 72 73 switch (dp->ip6r_type) { 74 case IPV6_RTHDR_TYPE_0: 75 dp0 = (struct ip6_rthdr0 *)dp; 76 77 TCHECK(dp0->ip6r0_reserved); 78 if (dp0->ip6r0_reserved || vflag) { 79 printf(", rsv=0x%0x", 80 (u_int32_t)ntohl(dp0->ip6r0_reserved)); 81 } 82 83 if (len % 2 == 1) 84 goto trunc; 85 len >>= 1; 86 for (i = 0; i < len; i++) { 87 struct in6_addr *addr; 88 89 addr = ((struct in6_addr *)(dp0 + 1)) + i; 90 if ((u_char *)addr > ep - sizeof(*addr)) 91 goto trunc; 92 93 printf(", [%d]%s", i, ip6addr_string((u_char *)addr)); 94 } 95 printf(")"); 96 return((dp0->ip6r0_len + 1) << 3); 97 default: 98 if (bp + ((dp->ip6r_len + 1) << 3) > ep) 99 goto trunc; 100 printf(")"); 101 return((dp->ip6r_len + 1) << 3); 102 } 103 104 trunc: 105 printf(", [|srcrt]"); 106 return 65535; /* XXX */ 107 } 108