diff options
Diffstat (limited to 'sysdeps/posix/getaddrinfo.c')
| -rw-r--r-- | sysdeps/posix/getaddrinfo.c | 125 |
1 files changed, 113 insertions, 12 deletions
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index 2dc5e90a32..3ba4bde25e 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -50,6 +50,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include <sys/un.h> #include <sys/utsname.h> #include <net/if.h> +#include <nsswitch.h> #define GAIH_OKIFUNSPEC 0x0100 #define GAIH_EAI ~(GAIH_OKIFUNSPEC) @@ -269,12 +270,11 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp, int i, herrno; \ size_t tmpbuflen; \ struct hostent th; \ - char *tmpbuf; \ + char *tmpbuf = NULL; \ tmpbuflen = 512; \ no_data = 0; \ do { \ - tmpbuflen *= 2; \ - tmpbuf = __alloca (tmpbuflen); \ + tmpbuf = extend_alloca (tmpbuf, tmpbuflen, 2 * tmpbuflen); \ rc = __gethostbyname2_r (name, _family, &th, tmpbuf, \ tmpbuflen, &h, &herrno); \ } while (rc == ERANGE && herrno == NETDB_INTERNAL); \ @@ -295,7 +295,7 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp, for (i = 0; h->h_addr_list[i]; i++) \ { \ if (*pat == NULL) { \ - *pat = __alloca (sizeof(struct gaih_addrtuple)); \ + *pat = __alloca (sizeof (struct gaih_addrtuple)); \ (*pat)->scopeid = 0; \ } \ (*pat)->next = NULL; \ @@ -307,6 +307,59 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp, } \ } +#define gethosts2(_family, _type) \ + { \ + int i, herrno; \ + size_t tmpbuflen; \ + struct hostent th; \ + char *tmpbuf = NULL; \ + tmpbuflen = 512; \ + no_data = 0; \ + do { \ + tmpbuf = extend_alloca (tmpbuf, tmpbuflen, 2 * tmpbuflen); \ + rc = 0; \ + status = DL_CALL_FCT (fct, (name, _family, &th, tmpbuf, \ + tmpbuflen, &rc, &herrno)); \ + } while (rc == ERANGE && herrno == NETDB_INTERNAL); \ + if (status == NSS_STATUS_SUCCESS && rc == 0) \ + h = &th; \ + else \ + h = NULL; \ + if (rc != 0) \ + { \ + if (herrno == NETDB_INTERNAL) \ + { \ + __set_h_errno (herrno); \ + return -EAI_SYSTEM; \ + } \ + if (herrno == TRY_AGAIN) \ + no_data = EAI_AGAIN; \ + else \ + no_data = herrno == NO_DATA; \ + } \ + else if (h != NULL) \ + { \ + for (i = 0; h->h_addr_list[i]; i++) \ + { \ + if (*pat == NULL) { \ + *pat = __alloca (sizeof (struct gaih_addrtuple)); \ + (*pat)->scopeid = 0; \ + } \ + (*pat)->next = NULL; \ + (*pat)->family = _family; \ + memcpy ((*pat)->addr, h->h_addr_list[i], \ + sizeof(_type)); \ + pat = &((*pat)->next); \ + } \ + } \ + } + +typedef enum nss_status (*nss_gethostbyname2_r) + (const char *name, int af, struct hostent *host, + char *buffer, size_t buflen, int *errnop, + int *h_errnop); +extern service_user *__nss_hosts_database attribute_hidden; + static int gaih_inet (const char *name, const struct gaih_service *service, const struct addrinfo *req, struct addrinfo **pai) @@ -488,7 +541,7 @@ gaih_inet (const char *name, const struct gaih_service *service, struct hostent *h; struct gaih_addrtuple **pat = &at; int no_data = 0; - int no_inet6_data; + int no_inet6_data = 0; int old_res_options = _res.options; /* If we are looking for both IPv4 and IPv6 address we don't @@ -496,16 +549,64 @@ gaih_inet (const char *name, const struct gaih_service *service, addresses to IPv6 addresses. Currently this is decided by setting the RES_USE_INET6 bit in _res.options. */ if (req->ai_family == AF_UNSPEC) - _res.options &= ~RES_USE_INET6; + { + service_user *nip = NULL; + enum nss_status inet6_status, status = NSS_STATUS_UNAVAIL; + int no_more; + nss_gethostbyname2_r fct; - if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) - gethosts (AF_INET6, struct in6_addr); - no_inet6_data = no_data; + if (__nss_hosts_database != NULL) + { + no_more = 0; + nip = __nss_hosts_database; + } + else + no_more = __nss_database_lookup ("hosts", NULL, + "dns [!UNAVAIL=return] files", &nip); - if (req->ai_family == AF_UNSPEC) - _res.options = old_res_options; + _res.options &= ~RES_USE_INET6; - if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) + while (!no_more) + { + fct = __nss_lookup_function (nip, "gethostbyname2_r"); + + gethosts2 (AF_INET6, struct in6_addr); + no_inet6_data = no_data; + inet6_status = status; + gethosts2 (AF_INET, struct in_addr); + + /* If we found one address for AF_INET or AF_INET6, + don't continue the search. */ + if (inet6_status == NSS_STATUS_SUCCESS || + status == NSS_STATUS_SUCCESS) + break; + + /* We can have different states for AF_INET + and AF_INET6. Try to find a usefull one for + both. */ + if (inet6_status == NSS_STATUS_TRYAGAIN) + status = NSS_STATUS_TRYAGAIN; + else if (status == NSS_STATUS_UNAVAIL && + inet6_status != NSS_STATUS_UNAVAIL) + status = inet6_status; + + if (nss_next_action (nip, status) == NSS_ACTION_RETURN) + break; + + if (nip->next == NULL) + no_more = -1; + else + nip = nip->next; + } + + _res.options = old_res_options; + } + else if (req->ai_family == AF_INET6) + { + gethosts (AF_INET6, struct in6_addr); + no_inet6_data = no_data; + } + else if (req->ai_family == AF_INET) gethosts (AF_INET, struct in_addr); if (no_data != 0 && no_inet6_data != 0) |