diff options
Diffstat (limited to 'support/resolv_test.h')
| -rw-r--r-- | support/resolv_test.h | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/support/resolv_test.h b/support/resolv_test.h deleted file mode 100644 index 6498751569..0000000000 --- a/support/resolv_test.h +++ /dev/null @@ -1,180 +0,0 @@ -/* DNS test framework and libresolv redirection. - Copyright (C) 2016-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef SUPPORT_RESOLV_TEST_H -#define SUPPORT_RESOLV_TEST_H - -#include <arpa/nameser.h> -#include <stdbool.h> -#include <sys/cdefs.h> - -__BEGIN_DECLS - -/* Information about EDNS properties of a DNS query. */ -struct resolv_edns_info -{ - bool active; - uint8_t extended_rcode; - uint8_t version; - uint16_t flags; - uint16_t payload_size; -}; - -/* This struct provides context information when the response callback - specified in struct resolv_redirect_config is invoked. */ -struct resolv_response_context -{ - const unsigned char *query_buffer; - size_t query_length; - int server_index; - bool tcp; - struct resolv_edns_info edns; -}; - -/* This opaque struct is used to construct responses from within the - response callback function. */ -struct resolv_response_builder; - -/* This opaque struct collects information about the resolver testing - currently in progress. */ -struct resolv_test; - -enum - { - /* Maximum number of test servers supported by the framework. */ - resolv_max_test_servers = 3, - }; - -/* Configuration settings specific to individual test servers. */ -struct resolv_redirect_server_config -{ - bool disable_tcp; /* If true, no TCP server is listening. */ - bool disable_udp; /* If true, no UDP server is listening. */ -}; - -/* Instructions for setting up the libresolv redirection. */ -struct resolv_redirect_config -{ - /* The response_callback function is called for every incoming DNS - packet, over UDP or TCP. It must be specified, the other - configuration settings are optional. */ - void (*response_callback) (const struct resolv_response_context *, - struct resolv_response_builder *, - const char *qname, - uint16_t qclass, uint16_t qtype); - - /* Per-server configuration. */ - struct resolv_redirect_server_config servers[resolv_max_test_servers]; - - /* Search path entries. The first entry serves as the default - domain name as well. */ - const char *search[7]; - - /* Number of servers to activate in resolv. 0 means the default, - resolv_max_test_servers. */ - int nscount; - - /* If true, use a single thread to process all UDP queries. This - may results in more predictable ordering of queries and - responses. */ - bool single_thread_udp; -}; - -/* Configure NSS to use, nss_dns only for aplicable databases, and try - to put the process into a network namespace for better isolation. - This may have to be called before resolv_test_start, before the - process creates any threads. Otherwise, initialization is - performed by resolv_test_start implicitly. */ -void resolv_test_init (void); - -/* Initiate resolver testing. This updates the _res variable as - needed. As a side effect, NSS is reconfigured to use nss_dns only - for aplicable databases, and the process may enter a network - namespace for better isolation. */ -struct resolv_test *resolv_test_start (struct resolv_redirect_config); - -/* Call this function at the end of resolver testing, to free - resources and report pending errors (if any). */ -void resolv_test_end (struct resolv_test *); - -/* The remaining facilities in this file are used for constructing - response packets from the response_callback function. */ - -/* Special settings for constructing responses from the callback. */ -struct resolv_response_flags -{ - /* 4-bit response code to incorporate into the response. */ - unsigned char rcode; - - /* If true, the TC (truncation) flag will be set. */ - bool tc; - - /* Initial section count values. Can be used to artificially - increase the counts, for malformed packet testing.*/ - unsigned short qdcount; - unsigned short ancount; - unsigned short nscount; - unsigned short adcount; -}; - -/* Begin a new response with the requested flags. Must be called - first. */ -void resolv_response_init (struct resolv_response_builder *, - struct resolv_response_flags); - -/* Switches to the section in the response packet. Only forward - movement is supported. */ -void resolv_response_section (struct resolv_response_builder *, ns_sect); - -/* Add a question record to the question section. */ -void resolv_response_add_question (struct resolv_response_builder *, - const char *name, uint16_t class, - uint16_t type); -/* Starts a new resource record with the specified owner name, class, - type, and TTL. Data is supplied with resolv_response_add_data or - resolv_response_add_name. */ -void resolv_response_open_record (struct resolv_response_builder *, - const char *name, uint16_t class, - uint16_t type, uint32_t ttl); - -/* Add unstructed bytes to the RDATA part of a resource record. */ -void resolv_response_add_data (struct resolv_response_builder *, - const void *, size_t); - -/* Add a compressed domain name to the RDATA part of a resource - record. */ -void resolv_response_add_name (struct resolv_response_builder *, - const char *name); - -/* Mark the end of the constructed record. Must be called last. */ -void resolv_response_close_record (struct resolv_response_builder *); - -/* Drop this query packet (that is, do not send a response, not even - an empty packet). */ -void resolv_response_drop (struct resolv_response_builder *); - -/* In TCP mode, close the connection after this packet (if a response - is sent). */ -void resolv_response_close (struct resolv_response_builder *); - -/* The size of the response packet built so far. */ -size_t resolv_response_length (const struct resolv_response_builder *); - -__END_DECLS - -#endif /* SUPPORT_RESOLV_TEST_H */ |