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-rw-r--r--src/test/test-nss.c536
1 files changed, 536 insertions, 0 deletions
diff --git a/src/test/test-nss.c b/src/test/test-nss.c
new file mode 100644
index 0000000..2e9414d
--- /dev/null
+++ b/src/test/test-nss.c
@@ -0,0 +1,536 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <dlfcn.h>
+#include <net/if.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "af-list.h"
+#include "alloc-util.h"
+#include "errno-list.h"
+#include "format-util.h"
+#include "hexdecoct.h"
+#include "hostname-util.h"
+#include "in-addr-util.h"
+#include "local-addresses.h"
+#include "log.h"
+#include "main-func.h"
+#include "nss-util.h"
+#include "path-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tests.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 = NULL;
+ void *handle;
+
+ if (dir)
+ path = strjoina(dir, "/libnss_", module, ".so.2");
+ if (!path || access(path, F_OK) < 0)
+ path = strjoina("libnss_", module, ".so.2");
+
+ log_debug("Using %s", path);
+ handle = dlopen(path, flags);
+ if (!handle)
+ log_error("Failed to load module %s: %s", module, dlerror());
+ return handle;
+}
+
+static int print_gaih_addrtuples(const struct gaih_addrtuple *tuples) {
+ int n = 0;
+
+ for (const struct gaih_addrtuple *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 + 1];
+
+ memcpy(&u, it->addr, 16);
+ r = in_addr_to_string(it->family, &u, &a);
+ assert_se(IN_SET(r, 0, -EAFNOSUPPORT));
+ if (r == -EAFNOSUPPORT)
+ assert_se(a = hexmem(it->addr, 16));
+
+ if (it->scopeid == 0)
+ goto numerical_index;
+
+ if (!format_ifname(it->scopeid, ifname)) {
+ log_warning_errno(errno, "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);
+ if (!f) {
+ log_info("%s not defined", fname);
+ return;
+ }
+
+ 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);
+ if (!f) {
+ log_info("%s not defined", fname);
+ return;
+ }
+
+ 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);
+ if (!f) {
+ log_info("%s not defined", fname);
+ return;
+ }
+
+ 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);
+ if (!f) {
+ log_info("%s not defined", fname);
+ return;
+ }
+
+ 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) {
+ log_info("%s not defined", fname);
+ 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) {
+ log_info("%s not defined", fname);
+ 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("");
+}
+
+static int make_addresses(struct local_address **addresses) {
+ int n;
+ size_t n_alloc;
+ _cleanup_free_ struct local_address *addrs = NULL;
+
+ n = local_addresses(NULL, 0, AF_UNSPEC, &addrs);
+ if (n < 0)
+ log_info_errno(n, "Failed to query local addresses: %m");
+
+ n_alloc = n; /* we _can_ do that */
+ if (!GREEDY_REALLOC(addrs, n_alloc, n + 3))
+ return log_oom();
+
+ addrs[n++] = (struct local_address) { .family = AF_INET,
+ .address.in = { htobe32(0x7F000001) } };
+ addrs[n++] = (struct local_address) { .family = AF_INET,
+ .address.in = { htobe32(0x7F000002) } };
+ addrs[n++] = (struct local_address) { .family = AF_INET6,
+ .address.in6 = in6addr_loopback };
+ return 0;
+}
+
+static int test_one_module(const char *dir,
+ const char *module,
+ char **names,
+ struct local_address *addresses,
+ int n_addresses) {
+ void *handle;
+ char **name;
+
+ log_info("======== %s ========", module);
+
+ handle = open_handle(dir, module, RTLD_LAZY|RTLD_NODELETE);
+ if (!handle)
+ return -EINVAL;
+
+ STRV_FOREACH(name, names)
+ test_byname(handle, module, *name);
+
+ for (int i = 0; i < n_addresses; i++)
+ test_byaddr(handle, module,
+ &addresses[i].address,
+ FAMILY_ADDRESS_SIZE(addresses[i].family),
+ addresses[i].family);
+
+ log_info(" ");
+ dlclose(handle);
+ return 0;
+}
+
+static int parse_argv(int argc, char **argv,
+ char ***the_modules,
+ char ***the_names,
+ struct local_address **the_addresses, int *n_addresses) {
+
+ int r, n = 0;
+ _cleanup_strv_free_ char **modules = NULL, **names = NULL;
+ _cleanup_free_ struct local_address *addrs = NULL;
+ size_t n_allocated = 0;
+
+ if (argc > 1)
+ modules = strv_new(argv[1]);
+ else
+ modules = strv_new(
+#if ENABLE_NSS_MYHOSTNAME
+ "myhostname",
+#endif
+#if ENABLE_NSS_RESOLVE
+ "resolve",
+#endif
+#if ENABLE_NSS_MYMACHINES
+ "mymachines",
+#endif
+ "dns");
+ if (!modules)
+ return -ENOMEM;
+
+ if (argc > 2) {
+ char **name;
+ int family;
+ union in_addr_union address;
+
+ STRV_FOREACH(name, argv + 2) {
+ r = in_addr_from_string_auto(*name, &family, &address);
+ if (r < 0) {
+ /* assume this is a name */
+ r = strv_extend(&names, *name);
+ if (r < 0)
+ return r;
+ } else {
+ if (!GREEDY_REALLOC0(addrs, n_allocated, n + 1))
+ return -ENOMEM;
+
+ addrs[n++] = (struct local_address) { .family = family,
+ .address = address };
+ }
+ }
+ } else {
+ _cleanup_free_ char *hostname;
+
+ hostname = gethostname_malloc();
+ if (!hostname)
+ return -ENOMEM;
+
+ names = strv_new("localhost", "_gateway", "foo_no_such_host", hostname);
+ if (!names)
+ return -ENOMEM;
+
+ n = make_addresses(&addrs);
+ if (n < 0)
+ return n;
+ }
+
+ *the_modules = modules;
+ *the_names = names;
+ modules = names = NULL;
+ *the_addresses = addrs;
+ *n_addresses = n;
+ addrs = NULL;
+ return 0;
+}
+
+static int run(int argc, char **argv) {
+ _cleanup_free_ char *dir = NULL;
+ _cleanup_strv_free_ char **modules = NULL, **names = NULL;
+ _cleanup_free_ struct local_address *addresses = NULL;
+ int n_addresses = 0;
+ char **module;
+ int r;
+
+ test_setup_logging(LOG_INFO);
+
+ r = parse_argv(argc, argv, &modules, &names, &addresses, &n_addresses);
+ if (r < 0) {
+ log_error_errno(r, "Failed to parse arguments: %m");
+ return EXIT_FAILURE;
+ }
+
+ dir = dirname_malloc(argv[0]);
+ if (!dir)
+ return log_oom();
+
+ STRV_FOREACH(module, modules) {
+ r = test_one_module(dir, *module, names, addresses, n_addresses);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-11 01:01:16 +0000