1 #pragma ident "%Z%%M% %I% %E% SMI" 2 3 /* 4 * lib/krb5/os/genaddrs.c 5 * 6 * Copyright 1995 by the Massachusetts Institute of Technology. 7 * All Rights Reserved. 8 * 9 * Export of this software from the United States of America may 10 * require a specific license from the United States Government. 11 * It is the responsibility of any person or organization contemplating 12 * export to obtain such a license before exporting. 13 * 14 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 15 * distribute this software and its documentation for any purpose and 16 * without fee is hereby granted, provided that the above copyright 17 * notice appear in all copies and that both that copyright notice and 18 * this permission notice appear in supporting documentation, and that 19 * the name of M.I.T. not be used in advertising or publicity pertaining 20 * to distribution of the software without specific, written prior 21 * permission. Furthermore if you modify this software you must label 22 * your software as modified software and not distribute it in such a 23 * fashion that it might be confused with the original M.I.T. software. 24 * M.I.T. makes no representations about the suitability of 25 * this software for any purpose. It is provided "as is" without express 26 * or implied warranty. 27 * 28 * 29 * Take an IP addr & port and generate a full IP address. 30 */ 31 32 #define NEED_SOCKETS 33 #include <k5-int.h> 34 #include "os-proto.h" 35 36 #if !defined(_WINSOCKAPI_) && !defined(HAVE_MACSOCK_H) 37 #include <netinet/in.h> 38 #endif 39 #include <inet/ip.h> 40 #include <inet/ip6.h> 41 42 #ifndef GETPEERNAME_ARG2_TYPE 43 #define GETPEERNAME_ARG2_TYPE struct sockaddr 44 #endif 45 #ifndef GETPEERNAME_ARG3_TYPE 46 #define GETPEERNAME_ARG3_TYPE size_t 47 #endif 48 #ifndef GETSOCKNAME_ARG2_TYPE 49 #define GETSOCKNAME_ARG2_TYPE struct sockaddr 50 #endif 51 #ifndef GETSOCKNAME_ARG3_TYPE 52 #define GETSOCKNAME_ARG3_TYPE size_t 53 #endif 54 55 struct addrpair { 56 krb5_address addr, port; 57 }; 58 59 #define SET(TARG, THING, TYPE) \ 60 ((TARG).contents = (krb5_octet *) &(THING), \ 61 (TARG).length = sizeof (THING), \ 62 (TARG).addrtype = (TYPE)) 63 64 static void *cvtaddr (struct sockaddr_storage *a, struct addrpair *ap) 65 { 66 switch (ss2sa(a)->sa_family) { 67 case AF_INET: 68 SET (ap->port, ss2sin(a)->sin_port, ADDRTYPE_IPPORT); 69 SET (ap->addr, ss2sin(a)->sin_addr, ADDRTYPE_INET); 70 return a; 71 #ifdef KRB5_USE_INET6 72 case AF_INET6: 73 SET (ap->port, ss2sin6(a)->sin6_port, ADDRTYPE_IPPORT); 74 if (IN6_IS_ADDR_V4MAPPED (&ss2sin6(a)->sin6_addr)) { 75 ap->addr.addrtype = ADDRTYPE_INET; 76 ap->addr.contents = (IPV6_ADDR_LEN - IPV4_ADDR_LEN) + 77 (krb5_octet *) &ss2sin6(a)->sin6_addr; 78 ap->addr.length = IPV4_ADDR_LEN; 79 } else 80 SET (ap->addr, ss2sin6(a)->sin6_addr, ADDRTYPE_INET6); 81 return a; 82 #endif 83 default: 84 return 0; 85 } 86 } 87 88 krb5_error_code KRB5_CALLCONV 89 krb5_auth_con_genaddrs(krb5_context context, krb5_auth_context auth_context, int infd, int flags) 90 { 91 krb5_error_code retval; 92 krb5_address * laddr; 93 krb5_address * lport; 94 krb5_address * raddr; 95 krb5_address * rport; 96 SOCKET fd = (SOCKET) infd; 97 struct addrpair laddrs, raddrs; 98 99 #ifdef HAVE_NETINET_IN_H 100 struct sockaddr_storage lsaddr, rsaddr; 101 GETSOCKNAME_ARG3_TYPE ssize; 102 103 ssize = sizeof(struct sockaddr_storage); 104 if ((flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR) || 105 (flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR)) { 106 if ((retval = getsockname(fd, (GETSOCKNAME_ARG2_TYPE *) &lsaddr, 107 &ssize))) 108 return retval; 109 110 if (cvtaddr (&lsaddr, &laddrs)) { 111 laddr = &laddrs.addr; 112 if (flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR) 113 lport = &laddrs.port; 114 else 115 lport = 0; 116 } else 117 return KRB5_PROG_ATYPE_NOSUPP; 118 } else { 119 laddr = NULL; 120 lport = NULL; 121 } 122 123 ssize = sizeof(struct sockaddr_storage); 124 if ((flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR) || 125 (flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_ADDR)) { 126 if ((retval = getpeername(fd, (GETPEERNAME_ARG2_TYPE *) &rsaddr, 127 &ssize))) 128 return errno; 129 130 if (cvtaddr (&rsaddr, &raddrs)) { 131 raddr = &raddrs.addr; 132 if (flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR) 133 rport = &raddrs.port; 134 else 135 rport = 0; 136 } else 137 return KRB5_PROG_ATYPE_NOSUPP; 138 } else { 139 raddr = NULL; 140 rport = NULL; 141 } 142 143 if (!(retval = krb5_auth_con_setaddrs(context, auth_context, laddr, raddr))) 144 return (krb5_auth_con_setports(context, auth_context, lport, rport)); 145 return retval; 146 #else 147 return KRB5_PROG_ATYPE_NOSUPP; 148 #endif 149 } 150