2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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18 * may be used to endorse or promote products derived from this software
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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36 RCSID("$Id: lsb_addr_comp.c,v 1.16 1999/12/02 16:58:42 joda Exp $");
38 #include "krb-archaeology.h"
41 krb_lsb_antinet_ulong_cmp(u_int32_t x, u_int32_t y)
44 u_int32_t a = 0, b = 0;
45 u_int8_t *p = (u_int8_t*) &x;
46 u_int8_t *q = (u_int8_t*) &y;
48 for(i = sizeof(u_int32_t) - 1; i >= 0; i--){
60 krb_lsb_antinet_ushort_cmp(u_int16_t x, u_int16_t y)
63 u_int16_t a = 0, b = 0;
64 u_int8_t *p = (u_int8_t*) &x;
65 u_int8_t *q = (u_int8_t*) &y;
67 for(i = sizeof(u_int16_t) - 1; i >= 0; i--){
79 lsb_time(time_t t, struct sockaddr_in *src, struct sockaddr_in *dst)
85 * direction bit is the sign bit of the timestamp. Ok until
89 krb_warning("lsb_time: src = %s:%u\n",
90 inet_ntoa(src->sin_addr), ntohs(src->sin_port));
91 krb_warning("lsb_time: dst = %s:%u\n",
92 inet_ntoa(dst->sin_addr), ntohs(dst->sin_port));
95 /* For compatibility with broken old code, compares are done in VAX
96 byte order (LSBFIRST) */
97 if (krb_lsb_antinet_ulong_less(src->sin_addr.s_addr, /* src < recv */
98 dst->sin_addr.s_addr) < 0)
100 else if (krb_lsb_antinet_ulong_less(src->sin_addr.s_addr,
101 dst->sin_addr.s_addr)==0)
102 if (krb_lsb_antinet_ushort_less(src->sin_port, dst->sin_port) < 0)
105 * all that for one tiny bit! Heaven help those that talk to
108 if(krb_get_config_bool("reverse_lsb_test")) {
110 krb_warning("lsb_time: reversing direction: %d -> %d\n", dir, -dir);
112 }else if((fw = krb_get_config_string("firewall_address"))) {
113 struct in_addr fw_addr;
114 fw_addr.s_addr = inet_addr(fw);
115 if(fw_addr.s_addr != INADDR_NONE) {
117 krb_warning("lsb_time: fw = %s\n", inet_ntoa(fw_addr));
118 /* negate if src < dst < fw || fw < dst < src */
119 s_lt_d = (krb_lsb_antinet_ulong_less(src->sin_addr.s_addr,
120 dst->sin_addr.s_addr) == -1);
121 d_lt_f = (krb_lsb_antinet_ulong_less(fw_addr.s_addr,
122 dst->sin_addr.s_addr) == 1);
123 if((s_lt_d ^ d_lt_f) == 0) {
125 krb_warning("lsb_time: reversing direction: %d -> %d\n",