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%% options
copyright owner = Dirk Krause
copyright year = 2015-xxxx
license = bsd
%% module
#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4sock.h"
#include "dk4sto.h"
$!trace-include
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
/** Compare IPv6 address structures.
@param left Left address in comparison.
@param mask Network mask to use, may be NULL.
@param right Right address in comparison.
@return -1, 0 or 1 if l<r, l==r or l>r.
*/
static
int
dk4socket_compare_in6_addr3(
const struct in6_addr *left,
const struct in6_addr *mask,
const struct in6_addr *right
)
{
const unsigned char *ucl;
const unsigned char *ucm;
const unsigned char *ucr;
unsigned char ul;
unsigned char ur;
size_t i;
int back = 0;
ucl = &(left->s6_addr[0]);
ucm = &(mask->s6_addr[0]);
ucr = &(right->s6_addr[0]);
for (i = 0; ((16 > i) && (0 == back)); i++) {
ul = ucl[i];
ur = ucr[i];
if (NULL != mask) {
ul &= ucm[i];
ur &= ucm[i];
}
if (ul > ur) {
back = 1;
} else {
if (ul < ur) {
back = -1;
}
}
}
return back;
}
#endif
int
dk4socket_allowed_peer_compare(
const void *pl,
const void *pr,
int cr
)
{
const dk4_allowed_peer_t *ppl;
const dk4_allowed_peer_t *ppr;
const struct sockaddr *pso;
const struct sockaddr_in *ps4;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
const struct sockaddr_in6 *ps6;
#endif
unsigned long ul1;
unsigned long ul2;
unsigned long ul3;
int back = 0;
$? "+ dk4socket_allowed_peer_compare %d", cr
if (NULL != pl) {
if (NULL != pr) {
switch (cr) {
case 1: { $? ". peer /sockaddr"
ppl = (const dk4_allowed_peer_t *)pl;
pso = (const struct sockaddr *)pr;
$? ". ppl->af = %d pso->af = %d", ppl->af, pso->sa_family
if (ppl->af < pso->sa_family) { $? ". families differ"
back = -1;
} else {
if (ppl->af > pso->sa_family) { $? ". families differ"
back = 1;
}
}
if (0 == back) { $? ". same family"
switch (ppl->af) {
case AF_INET : { $? ". IPv4"
ul1 = (ppl->data).ipv4.ad.s_addr;
ul3 = (ppl->data).ipv4.ma.s_addr;
ps4 = (const struct sockaddr_in *)pso;
ul2 = ps4->sin_addr.s_addr;
ul1 = dk4socket_ntohl(ul1);
ul2 = dk4socket_ntohl(ul2);
ul3 = dk4socket_ntohl(ul3);
$? ". ul1 = %lu.%lu.%lu.%lu", ((ul1 >> 24) & 0xFFUL), ((ul1 >> 16) & 0xFFUL), ((ul1 >> 8) & 0xFFUL), (ul1 & 0xFFUL)
$? ". ul2 = %lu.%lu.%lu.%lu", ((ul2 >> 24) & 0xFFUL), ((ul2 >> 16) & 0xFFUL), ((ul2 >> 8) & 0xFFUL), (ul2 & 0xFFUL)
$? ". ul3 = %lu.%lu.%lu.%lu", ((ul3 >> 24) & 0xFFUL), ((ul3 >> 16) & 0xFFUL), ((ul3 >> 8) & 0xFFUL), (ul3 & 0xFFUL)
ul1 &= ul3;
ul2 &= ul3;
$? ". ul1 = %lu.%lu.%lu.%lu", ((ul1 >> 24) & 0xFFUL), ((ul1 >> 16) & 0xFFUL), ((ul1 >> 8) & 0xFFUL), (ul1 & 0xFFUL)
$? ". ul2 = %lu.%lu.%lu.%lu", ((ul2 >> 24) & 0xFFUL), ((ul2 >> 16) & 0xFFUL), ((ul2 >> 8) & 0xFFUL), (ul2 & 0xFFUL)
if (ul1 > ul2) {
back = 1;
} else {
if (ul1 < ul2) {
back = -1;
}
}
} break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
case AF_INET6 : { $? ". IPv6"
ps6 = (const struct sockaddr_in6 *)pso;
back = dk4socket_compare_in6_addr3(
&((ppl->data).ipv6.ad),
&((ppl->data).ipv6.ma),
&(ps6->sin6_addr)
);
} break;
#endif
}
}
} break;
default : { $? ". peer / peer"
ppl = (const dk4_allowed_peer_t *)pl;
ppr = (const dk4_allowed_peer_t *)pr;
if (ppl->af < ppr->af) {
back = -1;
} else {
if (ppl->af > ppr->af) {
back = 1;
}
}
if (0 == back) {
switch (ppl->af) {
case AF_INET : {
ul1 = (ppl->data).ipv4.ad.s_addr;
ul2 = (ppr->data).ipv4.ad.s_addr;
ul1 = dk4socket_ntohl(ul1);
ul2 = dk4socket_ntohl(ul2);
if (ul1 > ul2) {
back = 1;
} else {
if (ul1 < ul2) {
back = -1;
}
}
ul1 = (ppl->data).ipv4.ma.s_addr;
ul2 = (ppr->data).ipv4.ma.s_addr;
ul1 = dk4socket_ntohl(ul1);
ul2 = dk4socket_ntohl(ul2);
if (ul1 > ul2) {
back = 1;
} else {
if (ul1 < ul2) {
back = -1;
}
}
} break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
case AF_INET6 : {
back = dk4socket_compare_in6_addr3(
&((ppl->data).ipv6.ad),
NULL,
&((ppr->data).ipv6.ad)
);
if (0 == back) {
back = dk4socket_compare_in6_addr3(
&((ppl->data).ipv6.ma),
NULL,
&((ppr->data).ipv6.ma)
);
}
} break;
#endif
}
}
} break;
}
} else { back= 1; }
} else {
if (NULL != pr) { back = -1; }
} $? "- dk4socket_allowed_peer_compare %d", back
return back;
}
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