1 files changed, 76 insertions, 0 deletions
diff --git a/data/lighttpd/lighttpd-1.4.53/src/inet_ntop_cache.c b/data/lighttpd/lighttpd-1.4.53/src/inet_ntop_cache.c
new file mode 100644
index 000000000..868b8df2f
--- /dev/null
+++ b/data/lighttpd/lighttpd-1.4.53/src/inet_ntop_cache.c
@@ -0,0 +1,76 @@
+#include "first.h"
+
+#include "inet_ntop_cache.h"
+
+#include "sys-socket.h"
+#include <sys/types.h>
+#include <string.h>
+#ifndef _WIN32
+#include <arpa/inet.h>
+#endif
+
+#include "sock_addr.h"
+
+
+const char * inet_ntop_cache_get_ip(server *srv, sock_addr *addr) {
+#ifdef HAVE_IPV6
+	typedef struct {
+		int family;
+		union {
+			struct in6_addr ipv6;
+			struct in_addr  ipv4;
+		} addr;
+		char b2[INET6_ADDRSTRLEN + 1];
+	} inet_ntop_cache_type;
+	#define INET_NTOP_CACHE_MAX 4
+	static inet_ntop_cache_type inet_ntop_cache[INET_NTOP_CACHE_MAX];
+	static int ndx;
+
+	int i;
+	UNUSED(srv);
+      #ifdef HAVE_SYS_UN_H
+	if (addr->plain.sa_family == AF_UNIX) return addr->un.sun_path;
+      #endif
+	for (i = 0; i < INET_NTOP_CACHE_MAX; i++) {
+		if (inet_ntop_cache[i].family == addr->plain.sa_family) {
+			if (inet_ntop_cache[i].family == AF_INET6 &&
+			    0 == memcmp(inet_ntop_cache[i].addr.ipv6.s6_addr, addr->ipv6.sin6_addr.s6_addr, 16)) {
+				/* IPv6 found in cache */
+				break;
+			} else if (inet_ntop_cache[i].family == AF_INET &&
+				   inet_ntop_cache[i].addr.ipv4.s_addr == addr->ipv4.sin_addr.s_addr) {
+				/* IPv4 found in cache */
+				break;
+
+			}
+		}
+	}
+
+	if (i == INET_NTOP_CACHE_MAX) {
+		/* not found in cache */
+		const char *s;
+
+		i = ndx;
+		if (++ndx >= INET_NTOP_CACHE_MAX) ndx = 0;
+		s = sock_addr_inet_ntop(addr, inet_ntop_cache[i].b2, INET6_ADDRSTRLEN);
+		if (NULL == s) return "";
+
+		inet_ntop_cache[i].family = addr->plain.sa_family;
+
+		if (inet_ntop_cache[i].family == AF_INET) {
+			inet_ntop_cache[i].addr.ipv4.s_addr = addr->ipv4.sin_addr.s_addr;
+		} else if (inet_ntop_cache[i].family == AF_INET6) {
+			memcpy(inet_ntop_cache[i].addr.ipv6.s6_addr, addr->ipv6.sin6_addr.s6_addr, 16);
+		}
+	}
+
+	return inet_ntop_cache[i].b2;
+#else
+	UNUSED(srv);
+	if (addr->plain.sa_family == AF_INET) return inet_ntoa(addr->ipv4.sin_addr);
+      #ifdef HAVE_SYS_UN_H
+	if (addr->plain.sa_family == AF_UNIX) return addr->un.sun_path;
+      #endif
+	return "";
+#endif
+}