diff options
Diffstat (limited to 'src/nss-myhostname')
-rw-r--r-- | src/nss-myhostname/nss-myhostname.c | 83 |
1 files changed, 38 insertions, 45 deletions
diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c index 31db1aaf68..11c27575c0 100644 --- a/src/nss-myhostname/nss-myhostname.c +++ b/src/nss-myhostname/nss-myhostname.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -19,17 +17,20 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include <nss.h> -#include <netdb.h> #include <errno.h> -#include <string.h> #include <net/if.h> +#include <netdb.h> +#include <nss.h> #include <stdlib.h> +#include <string.h> +#include "alloc-util.h" +#include "hostname-util.h" #include "local-addresses.h" #include "macro.h" #include "nss-util.h" -#include "hostname-util.h" +#include "signal-util.h" +#include "string-util.h" #include "util.h" /* We use 127.0.0.2 as IPv4 address. This has the advantage over @@ -37,20 +38,12 @@ * IPv6 we use ::1 which unfortunately will not translate back to the * hostname but instead something like "localhost" or so. */ -#define LOCALADDRESS_IPV4 (htonl(0x7F000002)) +#define LOCALADDRESS_IPV4 (htobe32(0x7F000002)) #define LOCALADDRESS_IPV6 &in6addr_loopback -#define LOOPBACK_INTERFACE "lo" NSS_GETHOSTBYNAME_PROTOTYPES(myhostname); NSS_GETHOSTBYADDR_PROTOTYPES(myhostname); -static bool is_gateway(const char *hostname) { - assert(hostname); - - return streq(hostname, "gateway") || - streq(hostname, "gateway."); -} - enum nss_status _nss_myhostname_gethostbyname4_r( const char *name, struct gaih_addrtuple **pat, @@ -69,6 +62,8 @@ enum nss_status _nss_myhostname_gethostbyname4_r( char *r_name; unsigned n; + BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); + assert(name); assert(pat); assert(buffer); @@ -80,9 +75,9 @@ enum nss_status _nss_myhostname_gethostbyname4_r( * is optional */ canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); + local_address_ipv4 = htobe32(INADDR_LOOPBACK); - } else if (is_gateway(name)) { + } else if (is_gateway_hostname(name)) { n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); if (n_addresses <= 0) { @@ -101,7 +96,7 @@ enum nss_status _nss_myhostname_gethostbyname4_r( return NSS_STATUS_TRYAGAIN; } - /* We respond to our local host name, our our hostname suffixed with a single dot. */ + /* We respond to our local host name, our hostname suffixed with a single dot. */ if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { *errnop = ENOENT; *h_errnop = HOST_NOT_FOUND; @@ -117,7 +112,7 @@ enum nss_status _nss_myhostname_gethostbyname4_r( } /* If this call fails we fill in 0 as scope. Which is fine */ - lo_ifi = n_addresses <= 0 ? if_nametoindex(LOOPBACK_INTERFACE) : 0; + lo_ifi = n_addresses <= 0 ? LOOPBACK_IFINDEX : 0; l = strlen(canonical); ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2); @@ -132,7 +127,8 @@ enum nss_status _nss_myhostname_gethostbyname4_r( memcpy(r_name, canonical, l+1); idx = ALIGN(l+1); - if (n_addresses <= 0) { + assert(n_addresses >= 0); + if (n_addresses == 0) { /* Second, fill in IPv6 tuple */ r_tuple = (struct gaih_addrtuple*) (buffer + idx); r_tuple->next = r_tuple_prev; @@ -333,6 +329,8 @@ enum nss_status _nss_myhostname_gethostbyname3_r( uint32_t local_address_ipv4 = 0; int n_addresses = 0; + BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); + assert(name); assert(host); assert(buffer); @@ -350,9 +348,9 @@ enum nss_status _nss_myhostname_gethostbyname3_r( if (is_localhost(name)) { canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); + local_address_ipv4 = htobe32(INADDR_LOOPBACK); - } else if (is_gateway(name)) { + } else if (is_gateway_hostname(name)) { n_addresses = local_gateways(NULL, 0, af, &addresses); if (n_addresses <= 0) { @@ -415,6 +413,8 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r( bool additional_from_hostname = false; unsigned n; + BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); + assert(addr); assert(host); assert(buffer); @@ -437,9 +437,9 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r( if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4) goto found; - if ((*(uint32_t*) addr) == htonl(INADDR_LOOPBACK)) { + if ((*(uint32_t*) addr) == htobe32(INADDR_LOOPBACK)) { canonical = "localhost"; - local_address_ipv4 = htonl(INADDR_LOOPBACK); + local_address_ipv4 = htobe32(INADDR_LOOPBACK); goto found; } @@ -454,39 +454,33 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r( } n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses > 0) { - for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { - if (af != a->family) - continue; + for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { + if (af != a->family) + continue; - if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) - goto found; - } + if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) + goto found; } - free(addresses); - addresses = NULL; + addresses = mfree(addresses); n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); - if (n_addresses > 0) { - for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { - if (af != a->family) - continue; + for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { + if (af != a->family) + continue; - if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { - canonical = "gateway"; - goto found; - } + if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { + canonical = "gateway"; + goto found; } } *errnop = ENOENT; *h_errnop = HOST_NOT_FOUND; - return NSS_STATUS_NOTFOUND; found: - if (!canonical || (!additional && additional_from_hostname)) { + if (!canonical || additional_from_hostname) { hn = gethostname_malloc(); if (!hn) { *errnop = ENOMEM; @@ -496,8 +490,7 @@ found: if (!canonical) canonical = hn; - - if (!additional && additional_from_hostname) + else additional = hn; } |