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bionic: Replace iface with opaque netid in resolver.

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Replace iface cache key with netid.

Replace _mark with netid.

Mark sockets used to test IPv4/IPv6 support as well as sockets
used to determine source address for rfc6724 sort.

Remove pid/uid mappings (functionality moved to system/netd).

Do not create resolv_cache when it does not exist, but rather only
when DNS configuration is supplied.

Clean up unused functions.

Change-Id: I9ccfda2902cc0943e87c9bc346ad9a2578accdab
This commit is contained in:
Szymon Jakubczak
2014-02-14 17:07:23 -05:00
committed by Paul Jensen
parent bc475bc8d1
commit ea9bf67881
13 changed files with 208 additions and 950 deletions
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54
libc/dns/include/resolv_cache.h
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@@ -34,61 +34,15 @@
struct __res_state;
struct resolv_cache; /* forward */
/* gets the cache for an interface. Set ifname argument to NULL or
* empty buffer ('\0') to get cache for default interface.
* returned cache might be NULL*/
/* Gets the cache for a network. Returned cache might be NULL. */
__LIBC_HIDDEN__
extern struct resolv_cache* __get_res_cache(const char* ifname);
/* this gets called everytime we detect some changes in the DNS configuration
* and will flush the cache */
__LIBC_HIDDEN__
extern void _resolv_cache_reset( unsigned generation );
/* Gets the address of the n:th name server for the default interface
* Return length of address on success else 0.
* Note: The first name server is at n = 1 */
__LIBC_HIDDEN__
extern int _resolv_cache_get_nameserver(int n, char* addr, int addrLen);
/* Gets the address of the n:th name server for a certain interface
* Return length of address on success else 0.
* Note: The first name server is at n = 1 */
__LIBC_HIDDEN__
extern int _resolv_cache_get_nameserver_for_iface(const char* ifname, int n,
char* addr, int addrLen);
/* Gets addrinfo of the n:th name server associated with an interface.
* NULL is returned if no address if found.
* Note: The first name server is at n = 1. */
__LIBC_HIDDEN__
extern struct addrinfo* _resolv_cache_get_nameserver_addr_for_iface(const char* ifname, int n);
/* Gets addrinfo of the n:th name server associated with the default interface
* NULL is returned if no address if found.
* Note: The first name server is at n = 1. */
__LIBC_HIDDEN__
extern struct addrinfo* _resolv_cache_get_nameserver_addr(int n);
/* gets the address associated with the default interface */
__LIBC_HIDDEN__
extern struct in_addr* _resolv_get_addr_of_default_iface();
/* gets the address associated with the specified interface */
__LIBC_HIDDEN__
extern struct in_addr* _resolv_get_addr_of_iface(const char* ifname);
/* Copy the name of the default interface to the provided buffer.
* Returns the string length of the default interface,
* be that less or more than the buffLen, or 0 if nothing had been written */
__LIBC_HIDDEN__
extern size_t _resolv_get_default_iface(char* buff, size_t buffLen);
extern struct resolv_cache* __get_res_cache(unsigned netid);
/* sets the name server addresses to the provided res_state structure. The
* name servers are retrieved from the cache which is associated
* with the interface to which the res_state structure is associated */
* with the network to which the res_state structure is associated */
__LIBC_HIDDEN__
extern void _resolv_populate_res_for_iface(struct __res_state* statp);
extern void _resolv_populate_res_for_net(struct __res_state* statp);
typedef enum {
RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */