2016-04-29 Florian Weimer <fweimer@redhat.com>
[BZ #19642]
* inet/getnameinfo.c (gni_host_inet_name, gni_host_inet_numeric)
(gni_host_inet, gni_host_local, gni_host, gni_serv_inet)
(gni_serv_local, gni_serv): New functions extracted from
getnameinfo.
(getnameinfo): Call gni_host and gni_serv to perform the
processing. Always free scratch buffer.
@@ -1,3 +1,21 @@
+/* Convert socket address to string using Name Service Switch modules.
+ Copyright (C) 1997-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
/* The Inner Net License, Version 2.00
The author(s) grant permission for redistribution and use in source and
@@ -169,19 +187,323 @@ nrl_domainname (void)
return domain;
};
+/* Convert host name, AF_INET/AF_INET6 case, name only. */
+static int
+gni_host_inet_name (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *host, socklen_t hostlen, int flags)
+{
+ int herrno;
+ struct hostent th;
+ struct hostent *h = NULL;
+ if (sa->sa_family == AF_INET6)
+ {
+ while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in6 *) sa)->sin6_addr),
+ sizeof(struct in6_addr),
+ AF_INET6, &th,
+ tmpbuf->data, tmpbuf->length,
+ &h, &herrno))
+ if (herrno == NETDB_INTERNAL && errno == ERANGE)
+ {
+ if (!scratch_buffer_grow (tmpbuf))
+ {
+ __set_h_errno (herrno);
+ return EAI_MEMORY;
+ }
+ }
+ else
+ break;
+ }
+ else
+ {
+ while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in *)sa)->sin_addr),
+ sizeof(struct in_addr),
+ AF_INET, &th,
+ tmpbuf->data, tmpbuf->length,
+ &h, &herrno))
+ if (herrno == NETDB_INTERNAL && errno == ERANGE)
+ {
+ if (!scratch_buffer_grow (tmpbuf))
+ {
+ __set_h_errno (herrno);
+ return EAI_MEMORY;
+ }
+ }
+ else
+ break;
+ }
+
+ if (h == NULL)
+ {
+ if (herrno == NETDB_INTERNAL)
+ {
+ __set_h_errno (herrno);
+ return EAI_SYSTEM;
+ }
+ if (herrno == TRY_AGAIN)
+ {
+ __set_h_errno (herrno);
+ return EAI_AGAIN;
+ }
+ }
+
+ if (h)
+ {
+ char *c;
+ if ((flags & NI_NOFQDN)
+ && (c = nrl_domainname ())
+ && (c = strstr (h->h_name, c))
+ && (c != h->h_name) && (*(--c) == '.'))
+ /* Terminate the string after the prefix. */
+ *c = '\0';
+
+#ifdef HAVE_LIBIDN
+ /* If requested, convert from the IDN format. */
+ if (flags & NI_IDN)
+ {
+ int idn_flags = 0;
+ if (flags & NI_IDN_ALLOW_UNASSIGNED)
+ idn_flags |= IDNA_ALLOW_UNASSIGNED;
+ if (flags & NI_IDN_USE_STD3_ASCII_RULES)
+ idn_flags |= IDNA_USE_STD3_ASCII_RULES;
+
+ char *out;
+ int rc = __idna_to_unicode_lzlz (h->h_name, &out,
+ idn_flags);
+ if (rc != IDNA_SUCCESS)
+ {
+ if (rc == IDNA_MALLOC_ERROR)
+ return EAI_MEMORY;
+ if (rc == IDNA_DLOPEN_ERROR)
+ return EAI_SYSTEM;
+ return EAI_IDN_ENCODE;
+ }
+
+ if (out != h->h_name)
+ {
+ h->h_name = strdupa (out);
+ free (out);
+ }
+ }
+#endif
+
+ size_t len = strlen (h->h_name) + 1;
+ if (len > hostlen)
+ return EAI_OVERFLOW;
+
+ memcpy (host, h->h_name, len);
+
+ return 0;
+ }
+
+ return EAI_NONAME;
+}
+
+/* Convert host name, AF_INET/AF_INET6 case, numeric conversion. */
+static int
+gni_host_inet_numeric (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *host, socklen_t hostlen, int flags)
+{
+ const char *c;
+ if (sa->sa_family == AF_INET6)
+ {
+ const struct sockaddr_in6 *sin6p;
+ uint32_t scopeid;
+
+ sin6p = (const struct sockaddr_in6 *) sa;
+
+ c = inet_ntop (AF_INET6,
+ (const void *) &sin6p->sin6_addr, host, hostlen);
+ scopeid = sin6p->sin6_scope_id;
+ if (scopeid != 0)
+ {
+ /* Buffer is >= IFNAMSIZ+1. */
+ char scopebuf[IFNAMSIZ + 1];
+ char *scopeptr;
+ int ni_numericscope = 0;
+ size_t real_hostlen = __strnlen (host, hostlen);
+ size_t scopelen = 0;
+
+ scopebuf[0] = SCOPE_DELIMITER;
+ scopebuf[1] = '\0';
+ scopeptr = &scopebuf[1];
+
+ if (IN6_IS_ADDR_LINKLOCAL (&sin6p->sin6_addr)
+ || IN6_IS_ADDR_MC_LINKLOCAL (&sin6p->sin6_addr))
+ {
+ if (if_indextoname (scopeid, scopeptr) == NULL)
+ ++ni_numericscope;
+ else
+ scopelen = strlen (scopebuf);
+ }
+ else
+ ++ni_numericscope;
+
+ if (ni_numericscope)
+ scopelen = 1 + __snprintf (scopeptr,
+ (scopebuf
+ + sizeof scopebuf
+ - scopeptr),
+ "%u", scopeid);
+
+ if (real_hostlen + scopelen + 1 > hostlen)
+ /* Signal the buffer is too small. This is
+ what inet_ntop does. */
+ c = NULL;
+ else
+ memcpy (host + real_hostlen, scopebuf, scopelen + 1);
+ }
+ }
+ else
+ c = inet_ntop (AF_INET,
+ (const void *) &(((const struct sockaddr_in *) sa)->sin_addr),
+ host, hostlen);
+ if (c == NULL)
+ return EAI_OVERFLOW;
+ return 0;
+}
+
+static int
+gni_host_inet (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *host, socklen_t hostlen, int flags)
+{
+ if (!(flags & NI_NUMERICHOST))
+ {
+ int result = gni_host_inet_name
+ (tmpbuf, sa, addrlen, host, hostlen, flags);
+ if (result != EAI_NONAME)
+ return result;
+ }
+
+ if (flags & NI_NAMEREQD)
+ return EAI_NONAME;
+ else
+ return gni_host_inet_numeric
+ (tmpbuf, sa, addrlen, host, hostlen, flags);
+}
+
+static int
+gni_host_local (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *host, socklen_t hostlen, int flags)
+{
+
+ if (!(flags & NI_NUMERICHOST))
+ {
+ struct utsname utsname;
+
+ if (!uname (&utsname))
+ {
+ strncpy (host, utsname.nodename, hostlen);
+ return 0;
+ }
+ }
+
+ if (flags & NI_NAMEREQD)
+ return EAI_NONAME;
+
+ strncpy (host, "localhost", hostlen);
+ return 0;
+}
+
+static int
+gni_host (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *host, socklen_t hostlen, int flags)
+{
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ case AF_INET6:
+ return gni_host_inet (tmpbuf, sa, addrlen, host, hostlen, flags);
+
+ case AF_LOCAL:
+ return gni_host_local (tmpbuf, sa, addrlen, host, hostlen, flags);
+
+ default:
+ return EAI_FAMILY;
+ }
+}
+
+/* Convert service to string, AF_INET and AF_INET6 variant. */
+static int
+gni_serv_inet (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *serv, socklen_t servlen, int flags)
+{
+ _Static_assert
+ (offsetof (struct sockaddr_in, sin_port)
+ == offsetof (struct sockaddr_in6, sin6_port)
+ && sizeof (((struct sockaddr_in) {}).sin_port) == sizeof (in_port_t)
+ && sizeof (((struct sockaddr_in6) {}).sin6_port) == sizeof (in_port_t),
+ "AF_INET and AF_INET6 port consistency");
+ if (!(flags & NI_NUMERICSERV))
+ {
+ struct servent *s, ts;
+ int e;
+ while ((e = __getservbyport_r (((const struct sockaddr_in *) sa)->sin_port,
+ ((flags & NI_DGRAM)
+ ? "udp" : "tcp"), &ts,
+ tmpbuf->data, tmpbuf->length, &s)))
+ {
+ if (e == ERANGE)
+ {
+ if (!scratch_buffer_grow (tmpbuf))
+ return EAI_MEMORY;
+ }
+ else
+ break;
+ }
+ if (s)
+ {
+ strncpy (serv, s->s_name, servlen);
+ return 0;
+ }
+ /* Fall through to numeric conversion. */
+ }
+ if (__snprintf (serv, servlen, "%d",
+ ntohs (((const struct sockaddr_in *) sa)->sin_port))
+ + 1 > servlen)
+ return EAI_OVERFLOW;
+ return 0;
+}
+
+/* Convert service to string, AF_LOCAL variant. */
+static int
+gni_serv_local (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *serv, socklen_t servlen, int flags)
+{
+ strncpy (serv, ((const struct sockaddr_un *) sa)->sun_path, servlen);
+ return 0;
+}
+
+/* Convert service to string, dispatching to the implementations
+ above. */
+static int
+gni_serv (struct scratch_buffer *tmpbuf,
+ const struct sockaddr *sa, socklen_t addrlen,
+ char *serv, socklen_t servlen, int flags)
+{
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ case AF_INET6:
+ return gni_serv_inet (tmpbuf, sa, addrlen, serv, servlen, flags);
+ case AF_LOCAL:
+ return gni_serv_local (tmpbuf, sa, addrlen, serv, servlen, flags);
+ default:
+ return EAI_FAMILY;
+ }
+}
int
getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
socklen_t hostlen, char *serv, socklen_t servlen,
int flags)
{
- int herrno;
- struct hostent th;
- int ok = 0;
- struct scratch_buffer tmpbuf;
-
- scratch_buffer_init (&tmpbuf);
-
if (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV|NI_NOFQDN|NI_NAMEREQD|NI_DGRAM
#ifdef HAVE_LIBIDN
|NI_IDN|NI_IDN_ALLOW_UNASSIGNED|NI_IDN_USE_STD3_ASCII_RULES
@@ -213,249 +535,34 @@ getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
return EAI_FAMILY;
}
- if (host != NULL && hostlen > 0)
- switch (sa->sa_family)
- {
- case AF_INET:
- case AF_INET6:
- if (!(flags & NI_NUMERICHOST))
- {
- struct hostent *h = NULL;
- if (sa->sa_family == AF_INET6)
- {
- while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in6 *) sa)->sin6_addr),
- sizeof(struct in6_addr),
- AF_INET6, &th,
- tmpbuf.data, tmpbuf.length,
- &h, &herrno))
- if (herrno == NETDB_INTERNAL && errno == ERANGE)
- {
- if (!scratch_buffer_grow (&tmpbuf))
- {
- __set_h_errno (herrno);
- return EAI_MEMORY;
- }
- }
- else
- break;
- }
- else
- {
- while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in *)sa)->sin_addr),
- sizeof(struct in_addr),
- AF_INET, &th,
- tmpbuf.data, tmpbuf.length,
- &h, &herrno))
- if (herrno == NETDB_INTERNAL && errno == ERANGE)
- {
- if (!scratch_buffer_grow (&tmpbuf))
- {
- __set_h_errno (herrno);
- return EAI_MEMORY;
- }
- }
- else
- break;
- }
-
- if (h == NULL)
- {
- if (herrno == NETDB_INTERNAL)
- {
- __set_h_errno (herrno);
- return EAI_SYSTEM;
- }
- if (herrno == TRY_AGAIN)
- {
- __set_h_errno (herrno);
- return EAI_AGAIN;
- }
- }
-
- if (h)
- {
- char *c;
- if ((flags & NI_NOFQDN)
- && (c = nrl_domainname ())
- && (c = strstr (h->h_name, c))
- && (c != h->h_name) && (*(--c) == '.'))
- /* Terminate the string after the prefix. */
- *c = '\0';
-
-#ifdef HAVE_LIBIDN
- /* If requested, convert from the IDN format. */
- if (flags & NI_IDN)
- {
- int idn_flags = 0;
- if (flags & NI_IDN_ALLOW_UNASSIGNED)
- idn_flags |= IDNA_ALLOW_UNASSIGNED;
- if (flags & NI_IDN_USE_STD3_ASCII_RULES)
- idn_flags |= IDNA_USE_STD3_ASCII_RULES;
-
- char *out;
- int rc = __idna_to_unicode_lzlz (h->h_name, &out,
- idn_flags);
- if (rc != IDNA_SUCCESS)
- {
- if (rc == IDNA_MALLOC_ERROR)
- return EAI_MEMORY;
- if (rc == IDNA_DLOPEN_ERROR)
- return EAI_SYSTEM;
- return EAI_IDN_ENCODE;
- }
-
- if (out != h->h_name)
- {
- h->h_name = strdupa (out);
- free (out);
- }
- }
-#endif
-
- size_t len = strlen (h->h_name) + 1;
- if (len > hostlen)
- return EAI_OVERFLOW;
-
- memcpy (host, h->h_name, len);
-
- ok = 1;
- }
- }
-
- if (!ok)
- {
- if (flags & NI_NAMEREQD)
- return EAI_NONAME;
- else
- {
- const char *c;
- if (sa->sa_family == AF_INET6)
- {
- const struct sockaddr_in6 *sin6p;
- uint32_t scopeid;
-
- sin6p = (const struct sockaddr_in6 *) sa;
-
- c = inet_ntop (AF_INET6,
- (const void *) &sin6p->sin6_addr, host, hostlen);
- scopeid = sin6p->sin6_scope_id;
- if (scopeid != 0)
- {
- /* Buffer is >= IFNAMSIZ+1. */
- char scopebuf[IFNAMSIZ + 1];
- char *scopeptr;
- int ni_numericscope = 0;
- size_t real_hostlen = __strnlen (host, hostlen);
- size_t scopelen = 0;
-
- scopebuf[0] = SCOPE_DELIMITER;
- scopebuf[1] = '\0';
- scopeptr = &scopebuf[1];
-
- if (IN6_IS_ADDR_LINKLOCAL (&sin6p->sin6_addr)
- || IN6_IS_ADDR_MC_LINKLOCAL (&sin6p->sin6_addr))
- {
- if (if_indextoname (scopeid, scopeptr) == NULL)
- ++ni_numericscope;
- else
- scopelen = strlen (scopebuf);
- }
- else
- ++ni_numericscope;
-
- if (ni_numericscope)
- scopelen = 1 + __snprintf (scopeptr,
- (scopebuf
- + sizeof scopebuf
- - scopeptr),
- "%u", scopeid);
-
- if (real_hostlen + scopelen + 1 > hostlen)
- /* Signal the buffer is too small. This is
- what inet_ntop does. */
- c = NULL;
- else
- memcpy (host + real_hostlen, scopebuf, scopelen + 1);
- }
- }
- else
- c = inet_ntop (AF_INET,
- (const void *) &(((const struct sockaddr_in *) sa)->sin_addr),
- host, hostlen);
- if (c == NULL)
- return EAI_OVERFLOW;
- }
- ok = 1;
- }
- break;
-
- case AF_LOCAL:
- if (!(flags & NI_NUMERICHOST))
- {
- struct utsname utsname;
-
- if (!uname (&utsname))
- {
- strncpy (host, utsname.nodename, hostlen);
- break;
- };
- };
-
- if (flags & NI_NAMEREQD)
- return EAI_NONAME;
-
- strncpy (host, "localhost", hostlen);
- break;
+ struct scratch_buffer tmpbuf;
+ scratch_buffer_init (&tmpbuf);
- default:
- return EAI_FAMILY;
+ if (host != NULL && hostlen > 0)
+ {
+ int result = gni_host (&tmpbuf, sa, addrlen, host, hostlen, flags);
+ if (result != 0)
+ {
+ scratch_buffer_free (&tmpbuf);
+ return result;
+ }
}
if (serv && (servlen > 0))
- switch (sa->sa_family)
- {
- case AF_INET:
- case AF_INET6:
- if (!(flags & NI_NUMERICSERV))
- {
- struct servent *s, ts;
- int e;
- while ((e = __getservbyport_r (((const struct sockaddr_in *) sa)->sin_port,
- ((flags & NI_DGRAM)
- ? "udp" : "tcp"), &ts,
- tmpbuf.data, tmpbuf.length, &s)))
- {
- if (e == ERANGE)
- {
- if (!scratch_buffer_grow (&tmpbuf))
- return EAI_MEMORY;
- }
- else
- break;
- }
- if (s)
- {
- strncpy (serv, s->s_name, servlen);
- break;
- }
- }
-
- if (__snprintf (serv, servlen, "%d",
- ntohs (((const struct sockaddr_in *) sa)->sin_port))
- + 1 > servlen)
- return EAI_OVERFLOW;
-
- break;
-
- case AF_LOCAL:
- strncpy (serv, ((const struct sockaddr_un *) sa)->sun_path, servlen);
- break;
+ {
+ int result = gni_serv (&tmpbuf, sa, addrlen, serv, servlen, flags);
+ if (result != 0)
+ {
+ scratch_buffer_free (&tmpbuf);
+ return result;
+ }
}
if (host && (hostlen > 0))
host[hostlen-1] = 0;
if (serv && (servlen > 0))
serv[servlen-1] = 0;
+ scratch_buffer_free (&tmpbuf);
return 0;
}
libc_hidden_def (getnameinfo)
Split getnameinfo into separate functions for host and service lookups, and for different address families. I preserved some pre-existing long lines for now. Validated with the new and attached nss_files test (which depends on the nss_files testing framework I posted earlier) and with the external libresolv test suite. Florian /* Test getnameinfo using nss_files. Copyright (C) 2016 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include "tst-nss-aux.h" #include "tst-nss-files-aux.h" #include <netdb.h> #include <string.h> #include <sys/un.h> #include <unistd.h> /* create_file_callback for /etc/hosts. */ static void create_hosts (const char *name, FILE *out, void *closure) { fputs ("127.0.0.1 localhost localhost.localdomain localhost4\n", out); fputs ("::1 localhost localhost.localdomain localhost6\n", out); fputs ("192.0.2.1 reverse-ipv4 reverse-ipv4.example\n", out); fputs ("2001:db8::1 reverse-ipv6 reverse-ipv6.example\n", out); fputs ("192.0.2.2 reverse reverse.example\n", out); fputs ("2001:db8::2 reverse reverse.example\n", out); fputs ("192.0.2.3 other-ipv4.example other-ipv4\n", out); fputs ("2001:db8::3 other-ipv6.example other-ipv6\n", out); fputs ("192.0.2.4 other.example other\n", out); fputs ("2001:db8::4 other.example other\n", out); } static void create_services (const char *name, FILE *out, void *closure) { fputs ("www 80/tcp\n", out); fputs ("exec 512/tcp\n", out); fputs ("biff 512/udp comsat\n", out); } static bool check_gni_match (int line, const char *kind, int flags, const char *expected, const char *actual) { if (expected != NULL && strcmp (actual, expected) != 0) { record_delayed_failure (); printf ("%1$s:%2$d: error: %3$s mismatch (flags 0x%6$x)\n" "%1$s:%2$d: error: expected: %4$s\n" "%1$s:%2$d: error: actual: %5$s\n", __FILE__, line, kind, expected, actual, flags); return false; } return true; } static void check_getnameinfo (const void *addr, size_t addrlen, int flags, const char *expected_host, const char *expected_service, int line) { size_t hostlen = 0; char *host = NULL; if (expected_host != NULL) { hostlen = strlen (expected_host) + 1; host = xmalloc (hostlen); } size_t servlen = 0; char *serv = NULL; if (expected_service != NULL) { servlen = strlen (expected_service) + 1; serv = xmalloc (servlen); } int ret = getnameinfo (addr, addrlen, host, hostlen, serv, servlen, flags); if (ret != 0) { record_delayed_failure (); printf ("%s:%d: error: unexpected error %s (%d) with flags 0x%x\n", __FILE__, line, gai_strerror (ret), ret, flags); } else { check_gni_match (line, "host", flags, expected_host, host); check_gni_match (line, "service", flags, expected_service, serv); } free (serv); free (host); } #define CHECK_GETNAMEINFO(addr, addrlen, flags, exp_host, exp_service) \ check_getnameinfo (addr, addrlen, flags, exp_host, exp_service, __LINE__) static void check_getnameinfo_error (const void *addr, size_t addrlen, int flags, int expected_error, int line) { char host[NI_MAXHOST]; char serv[NI_MAXSERV]; int ret = getnameinfo (addr, addrlen, host, sizeof (host), serv, sizeof (serv), flags); if (ret != expected_error) { record_delayed_failure (); printf ("%s:%d: error: expected error %s (%d), got %s (%d)," " with flags 0x%x\n", __FILE__, line, gai_strerror (expected_error), expected_error, gai_strerror (ret), ret, flags); } } #define CHECK_GETNAMEINFO_ERROR(addr, addrlen, flags, expected_error) \ check_getnameinfo_error (addr, addrlen, flags, expected_error, __LINE__) static void set_host_name (void) { if (is_in_uts_namespace ()) { const char *name = "host.example"; if (sethostname (name, strlen (name)) != 0) printf ("warning: sethostname (\"%s\"): %m\n", name); } } static void test_getnameinfo_inet (void) { set_host_name (); struct sockaddr_in sin = { .sin_family = AF_INET, .sin_addr = {ntohl (0xc0000200)}, .sin_port = ntohs (512) }; struct sockaddr_in6 sin6 = { .sin6_family = AF_INET6, .sin6_port = ntohs (512) }; memcpy (&sin6.sin6_addr, "\x20\x01\x0d\xb8\0\0\0\0\0\0\0\0\0\0\0\0", 16); for (int use_ipv6 = 0; use_ipv6 < 2; ++use_ipv6) for (int address = 1; address <= 5; ++address) for (int use_numerichost = 0; use_numerichost < 2; ++use_numerichost) for (int use_namereqd = 0; use_namereqd < 2; ++use_namereqd) for (int use_numericserv = 0; use_numericserv < 2; ++use_numericserv) for (int use_nofqdn = 0; use_nofqdn < 2; ++use_nofqdn) for (int use_dgram = 0; use_dgram < 2; ++use_dgram) { /* Address without reverse lookup. */ bool nxdomain = address == 5; ((char *)&sin.sin_addr.s_addr)[3] = address; ((char *)&sin6.sin6_addr.s6_addr)[15] = address; void *sa; socklen_t salen; if (use_ipv6) { sa = &sin6; salen = sizeof (sin6); } else { sa = &sin; salen = sizeof (sin); } char numeric_host[] = "192.0.2.0"; numeric_host[strlen (numeric_host) - 1] += address; char numeric_host6[] = "2001:db8::0"; numeric_host6[strlen (numeric_host6) - 1] += address; int flags = 0; if (use_numerichost) flags |= NI_NUMERICHOST; if (use_namereqd) flags |= NI_NAMEREQD; if (use_numericserv) flags |= NI_NUMERICSERV; if (use_nofqdn) flags |= NI_NOFQDN; if (use_dgram) flags |= NI_DGRAM; /* NI_NUMERICHOST with NI_NAMEREQD is not allowed. NI_NAMEREQD without a reverse lookup results in EAI_NONAME. */ if ((use_numerichost && use_namereqd) || (use_namereqd && nxdomain)) { CHECK_GETNAMEINFO_ERROR (sa, salen, flags, EAI_NONAME); continue; } const char *exp_host; if (use_numerichost || nxdomain) { /* Number output requested, or no reverse lookup. */ if (use_ipv6) exp_host = numeric_host6; else exp_host = numeric_host; } else /* Determine the expected address. 1 & 3 have different names for IPv4 and IPv6. 1/2 and 3/4 have different order of the aliases, and the first entry counts. */ switch (address) { case 1: if (use_ipv6) exp_host = "reverse-ipv6"; else exp_host = "reverse-ipv4"; break; case 2: exp_host = "reverse"; break; case 3: if (use_nofqdn) { if (use_ipv6) exp_host = "other-ipv6"; else exp_host = "other-ipv4"; } else { if (use_ipv6) exp_host = "other-ipv6.example"; else exp_host = "other-ipv4.example"; } break; case 4: if (use_nofqdn) exp_host = "other"; else exp_host = "other.example"; break; default: abort (); } const char *exp_serv; if (use_numericserv) exp_serv = "512"; else if (use_dgram) exp_serv = "biff"; else exp_serv = "exec"; CHECK_GETNAMEINFO (sa, salen, flags, exp_host, exp_serv); } } static void test_getnameinfo_local (void) { set_host_name (); char *expected_hostname = xgethostname (); struct sockaddr_un sun = { .sun_family = AF_LOCAL, .sun_path = "/tmp/.X11-unix/X0" }; for (int use_numerichost = 0; use_numerichost < 2; ++use_numerichost) for (int use_namereqd = 0; use_namereqd < 2; ++use_namereqd) for (int use_numericserv = 0; use_numericserv < 2; ++use_numericserv) for (int use_nofqdn = 0; use_nofqdn < 2; ++use_nofqdn) for (int use_dgram = 0; use_dgram < 2; ++use_dgram) { int flags = 0; const char *exp_host = expected_hostname; if (use_numerichost) { flags |= NI_NUMERICHOST; exp_host = "localhost"; } if (use_namereqd) flags |= NI_NAMEREQD; if (use_numericserv) flags |= NI_NUMERICSERV; if (use_nofqdn) flags |= NI_NOFQDN; if (use_dgram) flags |= NI_DGRAM; if (use_numerichost && use_namereqd) { CHECK_GETNAMEINFO_ERROR (&sun, sizeof (sun), flags, EAI_NONAME); continue; } CHECK_GETNAMEINFO (&sun, sizeof (sun), flags, exp_host, "/tmp/.X11-unix/X0"); } free (expected_hostname); } static int do_test (void) { configure_nss_files (); char *root = create_chroot (); create_etc_file (root, "hosts", create_hosts, NULL); create_etc_file (root, "services", create_services, NULL); isolate_in_subprocess (root, test_getnameinfo_inet); isolate_in_subprocess (root, test_getnameinfo_local); free (root); return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"