daxi20/smartdns
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update code

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This commit is contained in:
Nick Peng
2018-05-21 08:09:03 +08:00
parent 9584d1d082
commit 72dd4e6cd3
11 changed files with 1257 additions and 164 deletions
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34
util.c
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@@ -1,5 +1,9 @@
#include "util.h"
#include <time.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
unsigned long get_tick_count()
{
@@ -8,4 +12,34 @@ unsigned long get_tick_count()
clock_gettime(CLOCK_MONOTONIC, &ts);
return (ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
}
char *gethost_by_addr(char *host, struct sockaddr *addr, socklen_t addr_len)
{
struct sockaddr_storage *addr_store = (struct sockaddr_storage *)addr;
host[0] = 0;
switch (addr_store->ss_family) {
case AF_INET: {
struct sockaddr_in *addr_in;
addr_in = (struct sockaddr_in *)addr;
inet_ntop(AF_INET, &addr_in->sin_addr, host, addr_len);
} break;
case AF_INET6: {
struct sockaddr_in6 *addr_in6;
addr_in6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&addr_in6->sin6_addr)) {
struct sockaddr_in addr_in4;
memset(&addr_in4, 0, sizeof(addr_in4));
memcpy(&addr_in4.sin_addr.s_addr, addr_in6->sin6_addr.s6_addr + 12, sizeof(addr_in4.sin_addr.s_addr));
} else {
inet_ntop(AF_INET6, &addr_in6->sin6_addr, host, addr_len);
}
} break;
default:
goto errout;
break;
}
return host;
errout:
return NULL;
}