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ip2net: ip6_and use 64-bit and. 128 can cause alignment segfaults

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bol-van 2024-10-16 11:23:23 +03:00
parent 8d986b3315
commit 64b2f940a2
1 changed files with 7 additions and 5 deletions
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12
ip2net/ip2net.c
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@ -180,13 +180,15 @@ __attribute__((optimize ("no-strict-aliasing")))
#endif #endif
static void ip6_and(const struct in6_addr * restrict a, const struct in6_addr * restrict b, struct in6_addr * restrict result) static void ip6_and(const struct in6_addr * restrict a, const struct in6_addr * restrict b, struct in6_addr * restrict result)
{ {
#ifdef __SIZEOF_INT128__ // int 128 can cause alignment segfaults because sin6_addr in struct sockaddr_in6 is 8-byte aligned, not 16-byte
// gcc and clang have 128 bit int types on some 64-bit archs. take some advantage
*((unsigned __int128*)result->s6_addr) = *((unsigned __int128*)a->s6_addr) & *((unsigned __int128*)b->s6_addr); //#ifdef __SIZEOF_INT128__
#else // // gcc and clang have 128 bit int types on some 64-bit archs. take some advantage
// *((unsigned __int128*)result->s6_addr) = *((unsigned __int128*)a->s6_addr) & *((unsigned __int128*)b->s6_addr);
//#else
((uint64_t*)result->s6_addr)[0] = ((uint64_t*)a->s6_addr)[0] & ((uint64_t*)b->s6_addr)[0]; ((uint64_t*)result->s6_addr)[0] = ((uint64_t*)a->s6_addr)[0] & ((uint64_t*)b->s6_addr)[0];
((uint64_t*)result->s6_addr)[1] = ((uint64_t*)a->s6_addr)[1] & ((uint64_t*)b->s6_addr)[1]; ((uint64_t*)result->s6_addr)[1] = ((uint64_t*)a->s6_addr)[1] & ((uint64_t*)b->s6_addr)[1];
#endif //#endif
} }
static void rtrim(char *s) static void rtrim(char *s)