diff options
Diffstat (limited to '')
| -rw-r--r-- | src/test/test-nss.c | 536 |
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); |