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fixing -Wstrict-aliasing (part 1)

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[anp/hsw] 2024-08-15 23:23:18 +07:00
parent 20839d2fe3
commit ff00a2cd0d
2 changed files with 10 additions and 5 deletions
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11
tpws/helpers.c
View File

@ -10,6 +10,7 @@
#include <ifaddrs.h>
#include <time.h>
#include <sys/stat.h>
#include <netinet/in.h>
char *strncasestr(const char *s,const char *find, size_t slen)
{
@ -132,7 +133,7 @@ void print_addrinfo(const struct addrinfo *ai)
bool saismapped(const struct sockaddr_in6 *sa)
{
// ::ffff:1.2.3.4
return !memcmp(sa->sin6_addr.s6_addr,"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff",12);
return IN6_IS_ADDR_V4MAPPED(sa->sin6_addr.s6_addr);
}
bool samappedcmp(const struct sockaddr_in *sa1,const struct sockaddr_in6 *sa2)
{
@ -166,14 +167,14 @@ bool saconvmapped(struct sockaddr_storage *a)
bool is_localnet(const struct sockaddr *a)
{
// 0.0.0.0, ::ffff:0.0.0.0 = localhost in linux
return (a->sa_family==AF_INET && (*(char*)&((struct sockaddr_in *)a)->sin_addr.s_addr==127 || !((struct sockaddr_in *)a)->sin_addr.s_addr)) ||
(a->sa_family==AF_INET6 && saismapped((struct sockaddr_in6 *)a) && (((struct sockaddr_in6 *)a)->sin6_addr.s6_addr[12]==127 || !*(uint32_t*)(((struct sockaddr_in6 *)a)->sin6_addr.s6_addr+12)));
// 127.0.0.0/8, ::1 = localhost
return (a->sa_family==AF_INET && IN_LOOPBACK(((struct sockaddr_in *)a)->sin_addr.s_addr)) ||
(a->sa_family==AF_INET6 && IN6_IS_ADDR_LOOPBACK(((struct sockaddr_in6 *)a)->sin6_addr.s6_addr));
}
bool is_linklocal(const struct sockaddr_in6 *a)
{
// fe80::/10
return a->sin6_addr.s6_addr[0]==0xFE && (a->sin6_addr.s6_addr[1] & 0xC0)==0x80;
return IN6_IS_ADDR_LINKLOCAL(a->sin6_addr.s6_addr);
}
bool is_private6(const struct sockaddr_in6* a)
{

4
tpws/helpers.h
View File

@ -55,3 +55,7 @@ typedef struct
} port_filter;
bool pf_in_range(uint16_t port, const port_filter *pf);
bool pf_parse(const char *s, port_filter *pf);
#ifndef IN_LOOPBACK
#define IN_LOOPBACK(a) ((((uint32_t) (a)) & 0xff000000) == 0x7f000000)
#endif