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Diffstat (limited to 'inet/getnameinfo.c')
-rw-r--r--inet/getnameinfo.c402
1 files changed, 230 insertions, 172 deletions
diff --git a/inet/getnameinfo.c b/inet/getnameinfo.c
index 030447addb..037578f277 100644
--- a/inet/getnameinfo.c
+++ b/inet/getnameinfo.c
@@ -65,255 +65,313 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <arpa/inet.h>
#ifndef AF_LOCAL
-#define AF_LOCAL AF_UNIX
+# define AF_LOCAL AF_UNIX
#endif /* AF_LOCAL */
#if HOSTTABLE
-struct hostent *_addr2hostname_hosts(const char *, int, int);
+struct hostent *_addr2hostname_hosts (const char *, int, int);
#endif /* HOSTTABLE */
#ifndef min
-#define min(x,y) (((x) > (y)) ? (y) : (x))
+# define min(x,y) (((x) > (y)) ? (y) : (x))
#endif /* min */
-static const char *domain;
-static char *nrl_domainname(void)
+static char *
+nrl_domainname (void)
{
+ static const char *domain = NULL;
static int first = 1;
- if (first) {
-
- __libc_lock_define_initialized (static, lock);
- __libc_lock_lock (lock);
-
- if (first) {
- char *c;
- struct hostent *h, th;
- int tmpbuflen = 1024;
- char *tmpbuf = __alloca(tmpbuflen);
- int herror;
-
- first = 0;
-
- while (__gethostbyname_r("localhost", &th, tmpbuf, tmpbuflen, &h,
- &herror)) {
- if (herror == NETDB_INTERNAL) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
- }
- } else {
- break;
- }
- }
-
- if (h && (c = strchr(h->h_name, '.'))) {
- domain = __strdup (++c);
- goto ret;
- }
-
- while (gethostname (tmpbuf, tmpbuflen)) {
- tmpbuflen *= 2;
- tmpbuf = __alloca (tmpbuflen);
- }
- if (c = strchr(tmpbuf, '.')) {
- domain = __strdup(++c);
- goto ret;
- }
-
- while (__gethostbyname_r(tmpbuf, &th, tmpbuf, tmpbuflen, &h,
- &herror)) {
- if (herror == NETDB_INTERNAL) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
- }
- } else {
- break;
- }
- }
-
- if (h && (c = strchr(h->h_name, '.'))) {
- domain = __strdup(++c);
- goto ret;
- }
-
- {
- struct in_addr in_addr;
+ if (first)
+ {
+ __libc_lock_define_initialized (static, lock);
+ __libc_lock_lock (lock);
+
+ if (first)
+ {
+ char *c;
+ struct hostent *h, th;
+ int tmpbuflen = 1024;
+ char *tmpbuf = alloca (tmpbuflen);
+ int herror;
+
+ first = 0;
+
+ while (__gethostbyname_r ("localhost", &th, tmpbuf, tmpbuflen, &h,
+ &herror))
+ {
+ if (herror == NETDB_INTERNAL && errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
+ else
+ break;
+ }
- in_addr.s_addr = htonl(0x7f000001);
+ if (h && (c = strchr (h->h_name, '.')))
+ domain = __strdup (++c);
+ else
+ {
+ /* The name contains no domain information. Use the name
+ now to get more information. */
+ while (gethostname (tmpbuf, tmpbuflen))
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
- while (__gethostbyaddr_r((const char *)&in_addr,
- sizeof(struct in_addr), AF_INET, &th, tmpbuf,
- tmpbuflen, &h, &herror)) {
- if (herror == NETDB_INTERNAL) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
+ if ((c = strchr (tmpbuf, '.')))
+ domain = __strdup (++c);
+ else
+ {
+ /* We need to preserve the hostname. */
+ const char *hstname = strdupa (tmpbuf);
+
+ while (__gethostbyname_r (hstname, &th, tmpbuf, tmpbuflen,
+ &h, &herror))
+ {
+ if (herror == NETDB_INTERNAL && errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
+ else
+ break;
+ }
+
+ if (h && (c = strchr(h->h_name, '.')))
+ domain = __strdup (++c);
+ else
+ {
+ struct in_addr in_addr;
+
+ in_addr.s_addr = htonl (0x7f000001);
+
+ while (__gethostbyaddr_r ((const char *) &in_addr,
+ sizeof (struct in_addr),
+ AF_INET, &th, tmpbuf,
+ tmpbuflen, &h, &herror))
+ {
+ if (herror == NETDB_INTERNAL && errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
+ else
+ break;
+ }
+
+ if (h && (c = strchr (h->h_name, '.')))
+ domain = __strdup (++c);
+ }
+ }
}
- } else {
- break;
- }
- }
-
- if (h && (c = strchr(h->h_name, '.'))) {
- domain = __strdup(++c);
- goto ret;
}
- }
+ __libc_lock_unlock (lock);
}
- ret:
- __libc_lock_unlock (lock);
- }
-
return domain;
};
-int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t hostlen, char *serv, size_t servlen, int flags)
+
+int
+getnameinfo (const struct sockaddr *sa, size_t addrlen, char *host,
+ size_t hostlen, char *serv, size_t servlen, int flags)
{
int serrno = errno;
int tmpbuflen = 1024;
int herrno;
- char *tmpbuf = __alloca(tmpbuflen);
+ char *tmpbuf = alloca (tmpbuflen);
struct hostent th;
- if (!sa)
+ if (sa == NULL)
return -1;
- if (host && (hostlen > 0))
- switch(sa->sa_family) {
+ if (host != NULL && hostlen > 0)
+ switch(sa->sa_family)
+ {
case AF_INET:
#if INET6
case AF_INET6:
#endif /* INET6 */
- if (!(flags & NI_NUMERICHOST)) {
- struct hostent *h = NULL;
+ if (!(flags & NI_NUMERICHOST))
+ {
+ struct hostent *h = NULL;
#if HOSTTABLE
-#if INET6
- if (sa->sa_family == AF_INET6)
- h = _addr2hostname_hosts((void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), sizeof(struct in6_addr), AF_INET6);
- else
-#endif /* INET6 */
- h = _addr2hostname_hosts((void *)&(((struct sockaddr_in *)sa)->sin_addr), sizeof(struct in_addr), AF_INET);
+# if INET6
+ if (sa->sa_family == AF_INET6)
+ h = _addr2hostname_hosts ((void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
+ sizeof(struct in6_addr), AF_INET6);
+ else
+# endif /* INET6 */
+ h = _addr2hostname_hosts ((void *)& (((struct sockaddr_in *) sa)->sin_addr),
+ sizeof(struct in_addr), AF_INET);
#endif /* HOSTTABLE */
#if RESOLVER
- if (!h) {
+ if (h == NULL)
+ {
#if INET6
- if (sa->sa_family == AF_INET6) {
- while (__gethostbyaddr_r((void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), sizeof(struct in6_addr), AF_INET6, &th, tmpbuf, tmpbuflen, &h, &herrno)) {
- if (herrno == NETDB_INTERNAL) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
- } else {
- __set_h_errno(herrno);
- goto fail;
+ if (sa->sa_family == AF_INET6)
+ {
+ while (__gethostbyaddr_r ((void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
+ sizeof(struct in6_addr),
+ AF_INET6, &th, tmpbuf, tmpbuflen,
+ &h, &herrno))
+ {
+ if (herrno == NETDB_INTERNAL)
+ {
+ if (errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
+ else
+ {
+ __set_h_errno (herrno);
+ goto fail;
+ }
+ }
+ else
+ {
+ break;
+ }
+ }
}
- } else {
- break;
- }
- }
- } else {
+ else
+ {
#endif /* INET6 */
- while (__gethostbyaddr_r((void *)&(((struct sockaddr_in *)sa)->sin_addr), sizeof(struct in_addr), AF_INET, &th, tmpbuf, tmpbuflen, &h, &herrno)) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
- } else {
- break;
- }
+ while (__gethostbyaddr_r ((void *) &(((struct sockaddr_in *)sa)->sin_addr),
+ sizeof(struct in_addr), AF_INET,
+ &th, tmpbuf, tmpbuflen,
+ &h, &herrno))
+ {
+ if (errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = alloca (tmpbuflen);
+ }
+ else
+ {
+ break;
+ }
+ }
+ }
}
- }
- }
#endif /* RESOLVER */
- if (h) {
- if (flags & NI_NOFQDN) {
- char *c;
- if ((c = nrl_domainname()) && (c = strstr(h->h_name, c)) && (c != h->h_name) && (*(--c) == '.')) {
- strncpy(host, h->h_name, min(hostlen, (size_t) (c - h->h_name)));
+ if (h)
+ {
+ if (flags & NI_NOFQDN)
+ {
+ char *c;
+ if ((c = nrl_domainname ()) && (c = strstr(h->h_name, c))
+ && (c != h->h_name) && (*(--c) == '.'))
+ {
+ strncpy (host, h->h_name,
+ min(hostlen, (size_t) (c - h->h_name)));
+ break;
+ }
+ }
+ strncpy (host, h->h_name, hostlen);
break;
- };
- };
- strncpy(host, h->h_name, hostlen);
- break;
- };
- };
+ }
+ }
if (flags & NI_NAMEREQD)
goto fail;
-
- {
- const char *c;
+ else
+ {
+ const char *c;
#if INET6
- if (sa->sa_family == AF_INET6)
- c = inet_ntop(AF_INET6, (void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), host, hostlen);
- else
+ if (sa->sa_family == AF_INET6)
+ c = inet_ntop (AF_INET6,
+ (void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
+ host, hostlen);
+ else
#endif /* INET6 */
- c = inet_ntop(AF_INET, (void *)&(((struct sockaddr_in *)sa)->sin_addr), host, hostlen);
+ c = inet_ntop (AF_INET,
+ (void *) &(((struct sockaddr_in *) sa)->sin_addr),
+ host, hostlen);
- if (!c)
- goto fail;
- };
+ if (!c)
+ goto fail;
+ }
break;
+
#if LOCAL
case AF_LOCAL:
- if (!(flags & NI_NUMERICHOST)) {
- struct utsname utsname;
+ if (!(flags & NI_NUMERICHOST))
+ {
+ struct utsname utsname;
- if (!uname(&utsname)) {
- strncpy(host, utsname.nodename, hostlen);
- break;
+ if (!uname (&utsname))
+ {
+ strncpy (host, utsname.nodename, hostlen);
+ break;
+ };
};
- };
if (flags & NI_NAMEREQD)
goto fail;
- strncpy(host, "localhost", hostlen);
+ strncpy (host, "localhost", hostlen);
break;
#endif /* LOCAL */
+
default:
return -1;
- };
+ }
if (serv && (servlen > 0))
- switch(sa->sa_family) {
+ switch(sa->sa_family)
+ {
case AF_INET:
#if INET6
case AF_INET6:
#endif /* INET6 */
- if (!(flags & NI_NUMERICSERV)) {
- struct servent *s, ts;
- while (__getservbyport_r(((struct sockaddr_in *)sa)->sin_port, ((flags & NI_DGRAM) ? "udp" : "tcp"), &ts, tmpbuf, tmpbuflen, &s)) {
- if (herrno == NETDB_INTERNAL) {
- if (errno == ERANGE) {
- tmpbuflen *= 2;
- tmpbuf = __alloca(tmpbuflen);
- } else {
- goto fail;
+ if (!(flags & NI_NUMERICSERV))
+ {
+ struct servent *s, ts;
+ while (__getservbyport_r (((struct sockaddr_in *) sa)->sin_port,
+ ((flags & NI_DGRAM) ? "udp" : "tcp"),
+ &ts, tmpbuf, tmpbuflen, &s))
+ {
+ if (herrno == NETDB_INTERNAL)
+ {
+ if (errno == ERANGE)
+ {
+ tmpbuflen *= 2;
+ tmpbuf = __alloca(tmpbuflen);
+ }
+ else
+ goto fail;
+ }
+ else
+ {
+ break;
+ }
+ }
+ if (s)
+ {
+ strncpy(serv, s->s_name, servlen);
+ break;
}
- } else {
- break;
- }
}
- if (s) {
- strncpy(serv, s->s_name, servlen);
- break;
- };
- };
- snprintf(serv, servlen, "%d", ntohs(((struct sockaddr_in *)sa)->sin_port));
+ snprintf (serv, servlen, "%d",
+ ntohs (((struct sockaddr_in *) sa)->sin_port));
break;
+
#if LOCAL
case AF_LOCAL:
- strncpy(serv, ((struct sockaddr_un *)sa)->sun_path, servlen);
+ strncpy (serv, ((struct sockaddr_un *) sa)->sun_path, servlen);
break;
#endif /* LOCAL */
- };
+ }
+
if (host && (hostlen > 0))
host[hostlen-1] = 0;
if (serv && (servlen > 0))
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-28 14:18:37 +0000