77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#include "first.h"
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#include "inet_ntop_cache.h"
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#include "sys-socket.h"
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#include <sys/types.h>
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#include <string.h>
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#ifndef _WIN32
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#include <arpa/inet.h>
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#endif
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#include "sock_addr.h"
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const char * inet_ntop_cache_get_ip(server *srv, sock_addr *addr) {
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#ifdef HAVE_IPV6
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typedef struct {
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int family;
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union {
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struct in6_addr ipv6;
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struct in_addr ipv4;
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} addr;
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char b2[INET6_ADDRSTRLEN + 1];
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} inet_ntop_cache_type;
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#define INET_NTOP_CACHE_MAX 4
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static inet_ntop_cache_type inet_ntop_cache[INET_NTOP_CACHE_MAX];
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static int ndx;
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int i;
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UNUSED(srv);
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#ifdef HAVE_SYS_UN_H
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if (addr->plain.sa_family == AF_UNIX) return addr->un.sun_path;
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#endif
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for (i = 0; i < INET_NTOP_CACHE_MAX; i++) {
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if (inet_ntop_cache[i].family == addr->plain.sa_family) {
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if (inet_ntop_cache[i].family == AF_INET6 &&
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0 == memcmp(inet_ntop_cache[i].addr.ipv6.s6_addr, addr->ipv6.sin6_addr.s6_addr, 16)) {
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/* IPv6 found in cache */
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break;
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} else if (inet_ntop_cache[i].family == AF_INET &&
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inet_ntop_cache[i].addr.ipv4.s_addr == addr->ipv4.sin_addr.s_addr) {
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/* IPv4 found in cache */
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break;
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}
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}
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}
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if (i == INET_NTOP_CACHE_MAX) {
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/* not found in cache */
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const char *s;
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i = ndx;
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if (++ndx >= INET_NTOP_CACHE_MAX) ndx = 0;
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s = sock_addr_inet_ntop(addr, inet_ntop_cache[i].b2, INET6_ADDRSTRLEN);
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if (NULL == s) return "";
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inet_ntop_cache[i].family = addr->plain.sa_family;
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if (inet_ntop_cache[i].family == AF_INET) {
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inet_ntop_cache[i].addr.ipv4.s_addr = addr->ipv4.sin_addr.s_addr;
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} else if (inet_ntop_cache[i].family == AF_INET6) {
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memcpy(inet_ntop_cache[i].addr.ipv6.s6_addr, addr->ipv6.sin6_addr.s6_addr, 16);
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}
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}
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return inet_ntop_cache[i].b2;
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#else
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UNUSED(srv);
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if (addr->plain.sa_family == AF_INET) return inet_ntoa(addr->ipv4.sin_addr);
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#ifdef HAVE_SYS_UN_H
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if (addr->plain.sa_family == AF_UNIX) return addr->un.sun_path;
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#endif
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return "";
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#endif
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}
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