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Implement ASN lookups in well-known nat64 prefix
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parent
7ad8ef6951
commit
91035185dd
21
ui/asn.c
21
ui/asn.c
@ -21,6 +21,7 @@
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#ifdef HAVE_ERROR_H
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#include <error.h>
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@ -215,6 +216,13 @@ static void reverse_host6(
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}
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#endif
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#ifdef ENABLE_IPV6
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static bool is_well_known_nat64(struct in6_addr *addr){
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// 64:ff9b::
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return addr->s6_addr[0] == 0x00 && addr->s6_addr[1] == 0x64 && addr->s6_addr[2] == 0xff && addr->s6_addr[3] == 0x9b;
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}
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#endif
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static char *get_ipinfo(
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struct mtr_ctl *ctl,
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ip_t * addr)
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@ -229,10 +237,23 @@ static char *get_ipinfo(
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if (ctl->af == AF_INET6) {
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#ifdef ENABLE_IPV6
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if (is_well_known_nat64(addr)) {
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// Treats the final 4 bytes as IPv4 address
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unsigned char buff[4];
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memcpy(buff, addr->s6_addr + 12, 4);
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if (snprintf
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(key, NAMELEN, "%d.%d.%d.%d", buff[3], buff[2], buff[1],
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buff[0]) >= NAMELEN)
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return NULL;
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if (snprintf(lookup_key, NAMELEN, "%s.%s", key, ctl->ipinfo_provider4)
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>= NAMELEN)
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return NULL;
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} else {
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reverse_host6(addr, key, NAMELEN);
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if (snprintf(lookup_key, NAMELEN, "%s.%s", key, ctl->ipinfo_provider6)
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>= NAMELEN)
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return NULL;
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}
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#else
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return NULL;
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#endif
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