--- /dev/null
+/***
+ This file is part of systemd.
+
+ Copyright 2016 Zbigniew Jędrzejewski-Szmek
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <net/if.h>
+
+#include "log.h"
+#include "nss-util.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "alloc-util.h"
+#include "in-addr-util.h"
+#include "hexdecoct.h"
+#include "af-list.h"
+#include "stdio-util.h"
+#include "strv.h"
+#include "errno-list.h"
+#include "hostname-util.h"
+#include "local-addresses.h"
+
+static const char* nss_status_to_string(enum nss_status status, char *buf, size_t buf_len) {
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ return "NSS_STATUS_TRYAGAIN";
+ case NSS_STATUS_UNAVAIL:
+ return "NSS_STATUS_UNAVAIL";
+ case NSS_STATUS_NOTFOUND:
+ return "NSS_STATUS_NOTFOUND";
+ case NSS_STATUS_SUCCESS:
+ return "NSS_STATUS_SUCCESS";
+ case NSS_STATUS_RETURN:
+ return "NSS_STATUS_RETURN";
+ default:
+ snprintf(buf, buf_len, "%i", status);
+ return buf;
+ }
+};
+
+static const char* af_to_string(int family, char *buf, size_t buf_len) {
+ const char *name;
+
+ if (family == AF_UNSPEC)
+ return "*";
+
+ name = af_to_name(family);
+ if (name)
+ return name;
+
+ snprintf(buf, buf_len, "%i", family);
+ return buf;
+}
+
+static void* open_handle(const char* dir, const char* module, int flags) {
+ const char *path;
+ void *handle;
+
+ if (dir)
+ path = strjoina(dir, "/.libs/libnss_", module, ".so.2");
+ else
+ path = strjoina("libnss_", module, ".so.2");
+
+ handle = dlopen(path, flags);
+ assert_se(handle);
+ return handle;
+}
+
+static int print_gaih_addrtuples(const struct gaih_addrtuple *tuples) {
+ const struct gaih_addrtuple *it;
+ int n = 0;
+
+ for (it = tuples; it; it = it->next) {
+ _cleanup_free_ char *a = NULL;
+ union in_addr_union u;
+ int r;
+ char family_name[DECIMAL_STR_MAX(int)];
+ char ifname[IF_NAMESIZE];
+
+ memcpy(&u, it->addr, 16);
+ r = in_addr_to_string(it->family, &u, &a);
+ assert_se(r == 0 || r == -EAFNOSUPPORT);
+ if (r == -EAFNOSUPPORT)
+ assert_se((a = hexmem(it->addr, 16)));
+
+ if (it->scopeid == 0)
+ goto numerical_index;
+
+ if (if_indextoname(it->scopeid, ifname) == NULL) {
+ log_warning("if_indextoname(%d) failed: %m", it->scopeid);
+ numerical_index:
+ xsprintf(ifname, "%i", it->scopeid);
+ };
+
+ log_info(" \"%s\" %s %s %%%s",
+ it->name,
+ af_to_string(it->family, family_name, sizeof family_name),
+ a,
+ ifname);
+ n ++;
+ }
+ return n;
+}
+
+static void print_struct_hostent(struct hostent *host, const char *canon) {
+ char **s;
+
+ log_info(" \"%s\"", host->h_name);
+ STRV_FOREACH(s, host->h_aliases)
+ log_info(" alias \"%s\"", *s);
+ STRV_FOREACH(s, host->h_addr_list) {
+ union in_addr_union u;
+ _cleanup_free_ char *a = NULL;
+ char family_name[DECIMAL_STR_MAX(int)];
+ int r;
+
+ assert_se((unsigned) host->h_length == FAMILY_ADDRESS_SIZE(host->h_addrtype));
+ memcpy(&u, *s, host->h_length);
+ r = in_addr_to_string(host->h_addrtype, &u, &a);
+ assert_se(r == 0);
+ log_info(" %s %s",
+ af_to_string(host->h_addrtype, family_name, sizeof family_name),
+ a);
+ }
+ if (canon)
+ log_info(" canonical: \"%s\"", canon);
+}
+
+static void test_gethostbyname4_r(void *handle, const char *module, const char *name) {
+ const char *fname;
+ _nss_gethostbyname4_r_t f;
+ char buffer[2000];
+ struct gaih_addrtuple *pat = NULL;
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ int32_t ttl = INT32_MAX; /* nss-dns wants to return the lowest ttl,
+ and will access this variable through *ttlp,
+ so we need to set it to something.
+ I'm not sure if this is a bug in nss-dns
+ or not. */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ int n;
+
+ fname = strjoina("_nss_", module, "_gethostbyname4_r");
+ f = dlsym(handle, fname);
+ log_debug("dlsym(0x%p, %s) → 0x%p", handle, fname, f);
+ assert_se(f);
+
+ status = f(name, &pat, buffer, sizeof buffer, &errno1, &errno2, &ttl);
+ if (status == NSS_STATUS_SUCCESS) {
+ log_info("%s(\"%s\") → status=%s%-20spat=buffer+0x%tx errno=%d/%s h_errno=%d/%s ttl=%"PRIi32,
+ fname, name,
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ pat ? (char*) pat - buffer : 0,
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2),
+ ttl);
+ n = print_gaih_addrtuples(pat);
+ } else {
+ log_info("%s(\"%s\") → status=%s%-20spat=0x%p errno=%d/%s h_errno=%d/%s",
+ fname, name,
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ pat,
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2));
+ n = 0;
+ }
+
+ if (STR_IN_SET(module, "resolve", "mymachines") && status == NSS_STATUS_UNAVAIL)
+ return;
+
+ if (STR_IN_SET(module, "myhostname", "resolve") && streq(name, "localhost")) {
+ assert_se(status == NSS_STATUS_SUCCESS);
+ assert_se(n == 2);
+ }
+}
+
+
+static void test_gethostbyname3_r(void *handle, const char *module, const char *name, int af) {
+ const char *fname;
+ _nss_gethostbyname3_r_t f;
+ char buffer[2000];
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ int32_t ttl = INT32_MAX; /* nss-dns wants to return the lowest ttl,
+ and will access this variable through *ttlp,
+ so we need to set it to something.
+ I'm not sure if this is a bug in nss-dns
+ or not. */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ struct hostent host;
+ char *canon;
+ char family_name[DECIMAL_STR_MAX(int)];
+
+ fname = strjoina("_nss_", module, "_gethostbyname3_r");
+ f = dlsym(handle, fname);
+ log_debug("dlsym(0x%p, %s) → 0x%p", handle, fname, f);
+ assert_se(f);
+
+ status = f(name, af, &host, buffer, sizeof buffer, &errno1, &errno2, &ttl, &canon);
+ log_info("%s(\"%s\", %s) → status=%s%-20serrno=%d/%s h_errno=%d/%s ttl=%"PRIi32,
+ fname, name, af_to_string(af, family_name, sizeof family_name),
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2),
+ ttl);
+ if (status == NSS_STATUS_SUCCESS)
+ print_struct_hostent(&host, canon);
+}
+
+static void test_gethostbyname2_r(void *handle, const char *module, const char *name, int af) {
+ const char *fname;
+ _nss_gethostbyname2_r_t f;
+ char buffer[2000];
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ struct hostent host;
+ char family_name[DECIMAL_STR_MAX(int)];
+
+ fname = strjoina("_nss_", module, "_gethostbyname2_r");
+ f = dlsym(handle, fname);
+ log_debug("dlsym(0x%p, %s) → 0x%p", handle, fname, f);
+ assert_se(f);
+
+ status = f(name, af, &host, buffer, sizeof buffer, &errno1, &errno2);
+ log_info("%s(\"%s\", %s) → status=%s%-20serrno=%d/%s h_errno=%d/%s",
+ fname, name, af_to_string(af, family_name, sizeof family_name),
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2));
+ if (status == NSS_STATUS_SUCCESS)
+ print_struct_hostent(&host, NULL);
+}
+
+static void test_gethostbyname_r(void *handle, const char *module, const char *name) {
+ const char *fname;
+ _nss_gethostbyname_r_t f;
+ char buffer[2000];
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ struct hostent host;
+
+ fname = strjoina("_nss_", module, "_gethostbyname_r");
+ f = dlsym(handle, fname);
+ log_debug("dlsym(0x%p, %s) → 0x%p", handle, fname, f);
+ assert_se(f);
+
+ status = f(name, &host, buffer, sizeof buffer, &errno1, &errno2);
+ log_info("%s(\"%s\") → status=%s%-20serrno=%d/%s h_errno=%d/%s",
+ fname, name,
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2));
+ if (status == NSS_STATUS_SUCCESS)
+ print_struct_hostent(&host, NULL);
+}
+
+static void test_gethostbyaddr2_r(void *handle,
+ const char *module,
+ const void* addr, socklen_t len,
+ int af) {
+
+ const char *fname;
+ _nss_gethostbyaddr2_r_t f;
+ char buffer[2000];
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ struct hostent host;
+ int32_t ttl = INT32_MAX;
+ _cleanup_free_ char *addr_pretty = NULL;
+
+ fname = strjoina("_nss_", module, "_gethostbyaddr2_r");
+ f = dlsym(handle, fname);
+
+ log_full_errno(f ? LOG_DEBUG : LOG_INFO, errno,
+ "dlsym(0x%p, %s) → 0x%p: %m", handle, fname, f);
+ if (!f)
+ return;
+
+ assert_se(in_addr_to_string(af, addr, &addr_pretty) >= 0);
+
+ status = f(addr, len, af, &host, buffer, sizeof buffer, &errno1, &errno2, &ttl);
+ log_info("%s(\"%s\") → status=%s%-20serrno=%d/%s h_errno=%d/%s ttl=%"PRIi32,
+ fname, addr_pretty,
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2),
+ ttl);
+ if (status == NSS_STATUS_SUCCESS)
+ print_struct_hostent(&host, NULL);
+}
+
+static void test_gethostbyaddr_r(void *handle,
+ const char *module,
+ const void* addr, socklen_t len,
+ int af) {
+
+ const char *fname;
+ _nss_gethostbyaddr_r_t f;
+ char buffer[2000];
+ int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
+ enum nss_status status;
+ char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
+ struct hostent host;
+ _cleanup_free_ char *addr_pretty = NULL;
+
+ fname = strjoina("_nss_", module, "_gethostbyaddr_r");
+ f = dlsym(handle, fname);
+
+ log_full_errno(f ? LOG_DEBUG : LOG_INFO, errno,
+ "dlsym(0x%p, %s) → 0x%p: %m", handle, fname, f);
+ if (!f)
+ return;
+
+ assert_se(in_addr_to_string(af, addr, &addr_pretty) >= 0);
+
+ status = f(addr, len, af, &host, buffer, sizeof buffer, &errno1, &errno2);
+ log_info("%s(\"%s\") → status=%s%-20serrno=%d/%s h_errno=%d/%s",
+ fname, addr_pretty,
+ nss_status_to_string(status, pretty_status, sizeof pretty_status), "\n",
+ errno1, errno_to_name(errno1) ?: "---",
+ errno2, hstrerror(errno2));
+ if (status == NSS_STATUS_SUCCESS)
+ print_struct_hostent(&host, NULL);
+}
+
+static void test_byname(void *handle, const char *module, const char *name) {
+ test_gethostbyname4_r(handle, module, name);
+ puts("");
+
+ test_gethostbyname3_r(handle, module, name, AF_INET);
+ puts("");
+ test_gethostbyname3_r(handle, module, name, AF_INET6);
+ puts("");
+ test_gethostbyname3_r(handle, module, name, AF_UNSPEC);
+ puts("");
+ test_gethostbyname3_r(handle, module, name, AF_LOCAL);
+ puts("");
+
+ test_gethostbyname2_r(handle, module, name, AF_INET);
+ puts("");
+ test_gethostbyname2_r(handle, module, name, AF_INET6);
+ puts("");
+ test_gethostbyname2_r(handle, module, name, AF_UNSPEC);
+ puts("");
+ test_gethostbyname2_r(handle, module, name, AF_LOCAL);
+ puts("");
+
+ test_gethostbyname_r(handle, module, name);
+ puts("");
+}
+
+static void test_byaddr(void *handle,
+ const char *module,
+ const void* addr, socklen_t len,
+ int af) {
+ test_gethostbyaddr2_r(handle, module, addr, len, af);
+ puts("");
+
+ test_gethostbyaddr_r(handle, module, addr, len, af);
+ puts("");
+}
+
+#ifdef HAVE_MYHOSTNAME
+# define MODULE1 "myhostname\0"
+#endif
+#ifdef HAVE_RESOLVED
+# define MODULE2 "resolve\0"
+#endif
+#ifdef HAVE_MACHINED
+# define MODULE3 "mymachines\0"
+#endif
+#define MODULE4 "dns\0"
+
+int main(int argc, char **argv) {
+ _cleanup_free_ char *dir = NULL, *hostname = NULL;
+ const char *module;
+
+ const uint32_t local_address_ipv4 = htonl(0x7F000001);
+ const uint32_t local_address_ipv4_2 = htonl(0x7F000002);
+ _cleanup_free_ struct local_address *addresses = NULL;
+ int n_addresses;
+
+ log_set_max_level(LOG_INFO);
+ log_parse_environment();
+
+ dir = dirname_malloc(argv[0]);
+ assert_se(dir);
+
+ hostname = gethostname_malloc();
+ assert_se(hostname);
+
+ n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses);
+ if (n_addresses < 0) {
+ log_info_errno(n_addresses, "Failed to query local addresses: %m");
+ n_addresses = 0;
+ }
+
+ NULSTR_FOREACH(module, MODULE1 MODULE2 MODULE3 MODULE4) {
+ void *handle;
+ const char *name;
+ int i;
+
+ log_info("======== %s ========", module);
+
+ handle = open_handle(streq(module, "dns") ? NULL : dir,
+ module,
+ RTLD_LAZY|RTLD_NODELETE);
+ NULSTR_FOREACH(name, "localhost\0" "gateway\0" "foo_no_such_host\0")
+ test_byname(handle, module, name);
+
+ test_byname(handle, module, hostname);
+
+ test_byaddr(handle, module, &local_address_ipv4, sizeof local_address_ipv4, AF_INET);
+ test_byaddr(handle, module, &local_address_ipv4_2, sizeof local_address_ipv4_2, AF_INET);
+ test_byaddr(handle, module, &in6addr_loopback, sizeof in6addr_loopback, AF_INET6);
+
+ for (i = 0; i < n_addresses; i++)
+ test_byaddr(handle, module,
+ &addresses[i].address,
+ FAMILY_ADDRESS_SIZE(addresses[i].family),
+ addresses[i].family);
+
+ dlclose(handle);
+
+ log_info(" ");
+ }
+
+ return EXIT_SUCCESS;
+}
projects / thirdparty / systemd.git / commitdiff
