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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 13:13:44 +01:00
Break connection_dir_client_reached_eof() into smaller functions
This was a >630-line function, which doesn't make anybody happy. It was also mostly composed of a bunch of if-statements that handled different directory responses differently depending on the original purpose of the directory connection. The logical refactoring here is to move the body of each switch statement into a separate handler function, and to invoke those functions from a separate switch statement. This commit leaves whitespace mostly untouched, for ease of review. I'll reindent in the next commit.
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changes/refactor_reached_eof
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5
changes/refactor_reached_eof
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@ -0,0 +1,5 @@
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o Code simplification and refactoring:
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- Break up the 630-line function connection_dir_client_reached_eof() into
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a dozen smaller functions. This change should help maintainability and
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readability of the client directory code.
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@ -2073,6 +2073,39 @@ load_downloaded_routers(const char *body, smartlist_t *which,
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return added;
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}
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/** A structure to hold arguments passed into each directory response
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* handler */
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typedef struct response_handler_args_t {
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int status_code;
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const char *reason;
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const char *body;
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size_t body_len;
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const char *headers;
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} response_handler_args_t;
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static int handle_response_fetch_consensus(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_certificate(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_status_vote(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_detached_signatures(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_desc(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_microdesc(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_upload_dir(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_upload_vote(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_upload_signatures(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_fetch_renddesc_v2(dir_connection_t *,
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const response_handler_args_t *);
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static int handle_response_upload_renddesc_v2(dir_connection_t *,
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const response_handler_args_t *);
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/** We are a client, and we've finished reading the server's
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* response. Parse it and act appropriately.
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*
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@ -2098,8 +2131,6 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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int allow_partial = (conn->base_.purpose == DIR_PURPOSE_FETCH_SERVERDESC ||
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conn->base_.purpose == DIR_PURPOSE_FETCH_EXTRAINFO ||
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conn->base_.purpose == DIR_PURPOSE_FETCH_MICRODESC);
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time_t now = time(NULL);
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int src_code;
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size_t received_bytes;
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received_bytes = connection_get_inbuf_len(TO_CONN(conn));
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@ -2193,6 +2224,7 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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"'%s:%d'. I'll try again soon.",
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status_code, escaped(reason), conn->base_.address,
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conn->base_.port);
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time_t now = approx_time();
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if ((rs = router_get_mutable_consensus_status_by_id(id_digest)))
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rs->last_dir_503_at = now;
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if ((ds = router_get_fallback_dirserver_by_digest(id_digest)))
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@ -2260,7 +2292,77 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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}
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_CONSENSUS) {
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int rv;
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response_handler_args_t args;
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memset(&args, 0, sizeof(args));
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args.status_code = status_code;
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args.reason = reason;
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args.body = body;
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args.body_len = body_len;
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args.headers = headers;
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switch (conn->base_.purpose) {
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case DIR_PURPOSE_FETCH_CONSENSUS:
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rv = handle_response_fetch_consensus(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_CERTIFICATE:
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rv = handle_response_fetch_certificate(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_STATUS_VOTE:
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rv = handle_response_fetch_status_vote(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES:
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rv = handle_response_fetch_detached_signatures(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_SERVERDESC:
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case DIR_PURPOSE_FETCH_EXTRAINFO:
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rv = handle_response_fetch_desc(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_MICRODESC:
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rv = handle_response_fetch_microdesc(conn, &args);
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break;
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case DIR_PURPOSE_FETCH_RENDDESC_V2:
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rv = handle_response_fetch_renddesc_v2(conn, &args);
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break;
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case DIR_PURPOSE_UPLOAD_DIR:
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rv = handle_response_upload_dir(conn, &args);
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break;
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case DIR_PURPOSE_UPLOAD_SIGNATURES:
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rv = handle_response_upload_signatures(conn, &args);
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break;
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case DIR_PURPOSE_UPLOAD_VOTE:
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rv = handle_response_upload_vote(conn, &args);
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break;
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case DIR_PURPOSE_UPLOAD_RENDDESC_V2:
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rv = handle_response_upload_renddesc_v2(conn, &args);
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break;
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default:
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tor_assert_nonfatal_unreached();
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rv = -1;
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break;
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}
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tor_free(body);
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tor_free(headers);
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tor_free(reason);
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return rv;
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}
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/**
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* Handler function: processes a response to a request for a networkstatus
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* consensus document by checking the consensus, storing it, and marking
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* router requests as reachable.
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**/
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static int
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handle_response_fetch_consensus(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_CONSENSUS);
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const int status_code = args->status_code;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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const char *reason = args->reason;
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const time_t now = approx_time();
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int r;
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const char *flavname = conn->requested_resource;
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if (status_code != 200) {
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@ -2270,7 +2372,6 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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"'%s:%d' while fetching consensus directory.",
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status_code, escaped(reason), conn->base_.address,
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conn->base_.port);
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tor_free(body); tor_free(headers); tor_free(reason);
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networkstatus_consensus_download_failed(status_code, flavname);
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return -1;
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}
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@ -2282,7 +2383,6 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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"Unable to load %s consensus directory downloaded from "
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"server '%s:%d'. I'll try again soon.",
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flavname, conn->base_.address, conn->base_.port);
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tor_free(body); tor_free(headers); tor_free(reason);
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networkstatus_consensus_download_failed(0, flavname);
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return -1;
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}
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@ -2300,17 +2400,31 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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networkstatus_get_latest_consensus_by_flavor(FLAV_NS));
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}
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log_info(LD_DIR, "Successfully loaded consensus.");
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_CERTIFICATE) {
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if (status_code != 200) {
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return 0;
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}
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/**
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* Handler function: processes a response to a request for one or more
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* authority certificates
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**/
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static int
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handle_response_fetch_certificate(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_CERTIFICATE);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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if (status_code != 200) {
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log_warn(LD_DIR,
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"Received http status code %d (%s) from server "
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"'%s:%d' while fetching \"/tor/keys/%s\".",
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status_code, escaped(reason), conn->base_.address,
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conn->base_.port, conn->requested_resource);
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connection_dir_download_cert_failed(conn, status_code);
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tor_free(body); tor_free(headers); tor_free(reason);
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return -1;
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}
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log_info(LD_DIR,"Received authority certificates (body size %d) from "
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@ -2321,7 +2435,7 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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* Tell trusted_dirs_load_certs_from_string() whether it was by fp
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* or fp-sk pair.
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*/
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src_code = -1;
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int src_code = -1;
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if (!strcmpstart(conn->requested_resource, "fp/")) {
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src_code = TRUSTED_DIRS_CERTS_SRC_DL_BY_ID_DIGEST;
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} else if (!strcmpstart(conn->requested_resource, "fp-sk/")) {
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@ -2336,6 +2450,7 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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* ones got flushed to disk so it's safe to call this on them */
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connection_dir_download_cert_failed(conn, status_code);
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} else {
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time_t now = approx_time();
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directory_info_has_arrived(now, 0, 0);
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log_info(LD_DIR, "Successfully loaded certificates from fetch.");
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}
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@ -2346,8 +2461,24 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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conn->requested_resource);
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connection_dir_download_cert_failed(conn, status_code);
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}
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_STATUS_VOTE) {
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return 0;
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}
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/**
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* Handler function: processes a response to a request for an authority's
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* current networkstatus vote.
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**/
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static int
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handle_response_fetch_status_vote(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_STATUS_VOTE);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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const char *msg;
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int st;
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log_info(LD_DIR,"Got votes (body size %d) from server %s:%d",
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@ -2358,7 +2489,6 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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"'%s:%d' while fetching \"/tor/status-vote/next/%s.z\".",
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status_code, escaped(reason), conn->base_.address,
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conn->base_.port, conn->requested_resource);
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tor_free(body); tor_free(headers); tor_free(reason);
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return -1;
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}
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dirvote_add_vote(body, &msg, &st);
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@ -2367,8 +2497,24 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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} else {
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log_info(LD_DIR, "Added vote(s) successfully [msg: %s]", msg);
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}
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_DETACHED_SIGNATURES) {
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return 0;
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}
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/**
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* Handler function: processes a response to a request for the signatures
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* that an authority knows about on a given consensus.
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**/
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static int
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handle_response_fetch_detached_signatures(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_DETACHED_SIGNATURES);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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const char *msg = NULL;
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log_info(LD_DIR,"Got detached signatures (body size %d) from server %s:%d",
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(int)body_len, conn->base_.address, conn->base_.port);
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@ -2378,17 +2524,31 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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"\"/tor/status-vote/next/consensus-signatures.z\".",
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status_code, escaped(reason), conn->base_.address,
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conn->base_.port);
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tor_free(body); tor_free(headers); tor_free(reason);
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return -1;
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}
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if (dirvote_add_signatures(body, conn->base_.address, &msg)<0) {
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log_warn(LD_DIR, "Problem adding detached signatures from %s:%d: %s",
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conn->base_.address, conn->base_.port, msg?msg:"???");
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}
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_SERVERDESC ||
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conn->base_.purpose == DIR_PURPOSE_FETCH_EXTRAINFO) {
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return 0;
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}
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/**
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* Handler function: processes a response to a request for a group of server
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* descriptors or an extrainfo documents.
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**/
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static int
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handle_response_fetch_desc(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_SERVERDESC ||
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conn->base_.purpose == DIR_PURPOSE_FETCH_EXTRAINFO);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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int was_ei = conn->base_.purpose == DIR_PURPOSE_FETCH_EXTRAINFO;
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smartlist_t *which = NULL;
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int n_asked_for = 0;
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@ -2425,7 +2585,6 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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SMARTLIST_FOREACH(which, char *, cp, tor_free(cp));
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smartlist_free(which);
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}
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tor_free(body); tor_free(headers); tor_free(reason);
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return dir_okay ? 0 : -1;
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}
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/* Learn the routers, assuming we requested by fingerprint or "all"
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@ -2449,8 +2608,10 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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// descriptor_digests, conn->router_purpose);
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if (load_downloaded_routers(body, which, descriptor_digests,
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conn->router_purpose,
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conn->base_.address))
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conn->base_.address)) {
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time_t now = approx_time();
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directory_info_has_arrived(now, 0, 0);
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}
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}
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}
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if (which) { /* mark remaining ones as failed */
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@ -2468,8 +2629,24 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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}
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if (directory_conn_is_self_reachability_test(conn))
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router_dirport_found_reachable();
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}
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if (conn->base_.purpose == DIR_PURPOSE_FETCH_MICRODESC) {
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return 0;
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}
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/**
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* Handler function: processes a response to a request for a group of
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* microdescriptors
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**/
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static int
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handle_response_fetch_microdesc(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_MICRODESC);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *body = args->body;
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const size_t body_len = args->body_len;
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smartlist_t *which = NULL;
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log_info(LD_DIR,"Received answer to microdescriptor request (status %d, "
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"body size %d) from server '%s:%d'",
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@ -2490,10 +2667,10 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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dir_microdesc_download_failed(which, status_code);
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SMARTLIST_FOREACH(which, char *, cp, tor_free(cp));
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smartlist_free(which);
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tor_free(body); tor_free(headers); tor_free(reason);
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return 0;
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} else {
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smartlist_t *mds;
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time_t now = approx_time();
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mds = microdescs_add_to_cache(get_microdesc_cache(),
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body, body+body_len, SAVED_NOWHERE, 0,
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now, which);
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@ -2510,9 +2687,23 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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smartlist_free(which);
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smartlist_free(mds);
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}
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}
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if (conn->base_.purpose == DIR_PURPOSE_UPLOAD_DIR) {
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return 0;
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}
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/**
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* Handler function: processes a response to a POST request to upload our
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* router descriptor.
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**/
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static int
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handle_response_upload_dir(dir_connection_t *conn,
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const response_handler_args_t *args)
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{
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tor_assert(conn->base_.purpose == DIR_PURPOSE_UPLOAD_DIR);
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const int status_code = args->status_code;
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const char *reason = args->reason;
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const char *headers = args->headers;
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switch (status_code) {
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case 200: {
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dir_server_t *ds =
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@ -2563,9 +2754,22 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
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}
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/* return 0 in all cases, since we don't want to mark any
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* dirservers down just because they don't like us. */
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}
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if (conn->base_.purpose == DIR_PURPOSE_UPLOAD_VOTE) {
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return 0;
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}
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/**
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* Handler function: processes a response to POST request to upload our
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* own networkstatus vote.
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**/
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static int
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handle_response_upload_vote(dir_connection_t *conn,
|
||||
const response_handler_args_t *args)
|
||||
{
|
||||
tor_assert(conn->base_.purpose == DIR_PURPOSE_UPLOAD_VOTE);
|
||||
const int status_code = args->status_code;
|
||||
const char *reason = args->reason;
|
||||
|
||||
switch (status_code) {
|
||||
case 200: {
|
||||
log_notice(LD_DIR,"Uploaded a vote to dirserver %s:%d",
|
||||
@ -2587,9 +2791,21 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
|
||||
}
|
||||
/* return 0 in all cases, since we don't want to mark any
|
||||
* dirservers down just because they don't like us. */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Handler function: processes a response to POST request to upload our
|
||||
* view of the signatures on the current consensus.
|
||||
**/
|
||||
static int
|
||||
handle_response_upload_signatures(dir_connection_t *conn,
|
||||
const response_handler_args_t *args)
|
||||
{
|
||||
tor_assert(conn->base_.purpose == DIR_PURPOSE_UPLOAD_SIGNATURES);
|
||||
const int status_code = args->status_code;
|
||||
const char *reason = args->reason;
|
||||
|
||||
if (conn->base_.purpose == DIR_PURPOSE_UPLOAD_SIGNATURES) {
|
||||
switch (status_code) {
|
||||
case 200: {
|
||||
log_notice(LD_DIR,"Uploaded signature(s) to dirserver %s:%d",
|
||||
@ -2611,10 +2827,25 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
|
||||
}
|
||||
/* return 0 in all cases, since we don't want to mark any
|
||||
* dirservers down just because they don't like us. */
|
||||
}
|
||||
|
||||
if (conn->base_.purpose == DIR_PURPOSE_FETCH_RENDDESC_V2) {
|
||||
#define SEND_HS_DESC_FAILED_EVENT(reason) ( \
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Handler function: processes a response to a request for a v2 hidden service
|
||||
* descriptor.
|
||||
**/
|
||||
static int
|
||||
handle_response_fetch_renddesc_v2(dir_connection_t *conn,
|
||||
const response_handler_args_t *args)
|
||||
{
|
||||
tor_assert(conn->base_.purpose == DIR_PURPOSE_FETCH_RENDDESC_V2);
|
||||
const int status_code = args->status_code;
|
||||
const char *reason = args->reason;
|
||||
const char *body = args->body;
|
||||
const size_t body_len = args->body_len;
|
||||
|
||||
#define SEND_HS_DESC_FAILED_EVENT(reason) ( \
|
||||
control_event_hs_descriptor_failed(conn->rend_data, \
|
||||
conn->identity_digest, \
|
||||
reason) )
|
||||
@ -2689,10 +2920,23 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
|
||||
SEND_HS_DESC_FAILED_CONTENT();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (conn->base_.purpose == DIR_PURPOSE_UPLOAD_RENDDESC_V2) {
|
||||
#define SEND_HS_DESC_UPLOAD_FAILED_EVENT(reason) ( \
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Handler function: processes a response to a POST request to upload a v2
|
||||
* hidden service descriptor.
|
||||
**/
|
||||
static int
|
||||
handle_response_upload_renddesc_v2(dir_connection_t *conn,
|
||||
const response_handler_args_t *args)
|
||||
{
|
||||
tor_assert(conn->base_.purpose == DIR_PURPOSE_UPLOAD_RENDDESC_V2);
|
||||
const int status_code = args->status_code;
|
||||
const char *reason = args->reason;
|
||||
|
||||
#define SEND_HS_DESC_UPLOAD_FAILED_EVENT(reason) ( \
|
||||
control_event_hs_descriptor_upload_failed( \
|
||||
conn->identity_digest, \
|
||||
rend_data_get_address(conn->rend_data), \
|
||||
@ -2726,8 +2970,7 @@ connection_dir_client_reached_eof(dir_connection_t *conn)
|
||||
SEND_HS_DESC_UPLOAD_FAILED_EVENT("UNEXPECTED");
|
||||
break;
|
||||
}
|
||||
}
|
||||
tor_free(body); tor_free(headers); tor_free(reason);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user