1 /* $OpenBSD: print-rt6.c,v 1.8 2020/01/24 22:46:37 procter 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 struct ip6_hdr *ip; 53 const u_char *ep; 54 int i, len; 55 56 dp = (struct ip6_rthdr *)bp; 57 ip = (struct ip6_hdr *)bp2; 58 len = dp->ip6r_len; 59 60 /* 'ep' points to the end of avaible data. */ 61 ep = snapend; 62 63 #if 0 64 printf("%s > %s: ", 65 ip6addr_string(&ip->ip6_src), 66 ip6addr_string(&ip->ip6_dst)); 67 #endif 68 69 TCHECK(dp->ip6r_segleft); 70 71 printf("srcrt (len=%d, ", dp->ip6r_len); 72 printf("type=%d, ", dp->ip6r_type); 73 printf("segleft=%d", dp->ip6r_segleft); 74 75 switch (dp->ip6r_type) { 76 case IPV6_RTHDR_TYPE_0: 77 dp0 = (struct ip6_rthdr0 *)dp; 78 79 TCHECK(dp0->ip6r0_reserved); 80 if (dp0->ip6r0_reserved || vflag) { 81 printf(", rsv=0x%0x", 82 (u_int32_t)ntohl(dp0->ip6r0_reserved)); 83 } 84 85 if (len % 2 == 1) 86 goto trunc; 87 len >>= 1; 88 for (i = 0; i < len; i++) { 89 struct in6_addr *addr; 90 91 addr = ((struct in6_addr *)(dp0 + 1)) + i; 92 if ((u_char *)addr > ep - sizeof(*addr)) 93 goto trunc; 94 95 printf(", [%d]%s", i, ip6addr_string((u_char *)addr)); 96 } 97 printf(")"); 98 return((dp0->ip6r0_len + 1) << 3); 99 default: 100 if (bp + ((dp->ip6r_len + 1) << 3) > ep) 101 goto trunc; 102 printf(")"); 103 return((dp->ip6r_len + 1) << 3); 104 } 105 106 trunc: 107 printf(", [|srcrt]"); 108 return 65535; /* XXX */ 109 } 110