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r14101@tombo: nickm | 2008-02-10 13:24:27 -0500
Merge connection_or_act_on_netinfo into command.c; remove some fields from or_handshake_state(). svn:r13458
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@ -503,6 +503,9 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
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uint8_t n_other_addrs;
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time_t now = time(NULL);
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long apparent_skew = 0;
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uint32_t my_apparent_addr = 0;
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if (conn->link_proto < 2) {
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log_fn(LOG_PROTOCOL_WARN, LD_OR,
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"Received a NETINFO cell on %s connection; dropping.",
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@ -516,15 +519,10 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
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}
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tor_assert(conn->handshake_state &&
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conn->handshake_state->received_versions);
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if (conn->handshake_state->received_netinfo) {
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log_fn(LOG_PROTOCOL_WARN, LD_OR,
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"Received a duplicate NETINFO cell; dropping.");
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return;
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}
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/* Decode the cell. */
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timestamp = ntohl(get_uint32(cell->payload));
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if (abs(now - conn->handshake_state->sent_versions_at) < 180) {
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conn->handshake_state->apparent_skew = now - timestamp;
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apparent_skew = now - timestamp;
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}
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my_addr_type = (uint8_t) cell->payload[4];
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@ -538,7 +536,7 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
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connection_mark_for_close(TO_CONN(conn));
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return;
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} else if (my_addr_type == RESOLVED_TYPE_IPV4 && my_addr_len == 4) {
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conn->handshake_state->my_apparent_addr = ntohl(get_uint32(my_addr_ptr));
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my_apparent_addr = ntohl(get_uint32(my_addr_ptr));
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}
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n_other_addrs = (uint8_t) *cp++;
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@ -556,7 +554,7 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
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if (other_addr_type == RESOLVED_TYPE_IPV4 && other_addr_len == 4) {
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uint32_t addr = ntohl(get_uint32(cp));
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if (addr == conn->real_addr) {
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conn->handshake_state->apparently_canonical = 1;
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conn->is_canonical = 1;
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break;
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}
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}
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@ -564,17 +562,33 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
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--n_other_addrs;
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}
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conn->handshake_state->received_netinfo = 1;
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if (conn->handshake_state->apparently_canonical) {
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conn->is_canonical = 1;
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/* Act on apparent skew. */
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/** Warn when we get a netinfo skew with at least this value. */
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#define NETINFO_NOTICE_SKEW 3600
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if (abs(apparent_skew) > NETINFO_NOTICE_SKEW &&
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router_get_by_digest(conn->identity_digest)) {
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char dbuf[64];
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/*XXXX020 not always warn!*/
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format_time_interval(dbuf, sizeof(dbuf), apparent_skew);
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log_fn(LOG_WARN, LD_HTTP, "Received NETINFO cell with skewed time from "
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"server at %s:%d. It seems that our clock is %s by %s, or "
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"that theirs is %s. Tor requires an accurate clock to work: "
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"please check your time and date settings.",
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conn->_base.address, (int)conn->_base.port,
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apparent_skew>0 ? "ahead" : "behind", dbuf,
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apparent_skew>0 ? "behind" : "ahead");
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control_event_general_status(LOG_WARN,
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"CLOCK_SKEW SKEW=%ld SOURCE=OR:%s:%d",
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apparent_skew, conn->_base.address, conn->_base.port);
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}
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if (connection_or_act_on_netinfo(conn)<0 ||
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connection_or_set_state_open(conn)<0)
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connection_mark_for_close(TO_CONN(conn));
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log_info(LD_OR, "Got good NETINFO cell from %s",
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safe_str(conn->_base.address));
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/*XXX020 maybe act on my_apparent_addr */
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if (connection_or_set_state_open(conn)<0)
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connection_mark_for_close(TO_CONN(conn));
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else
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log_info(LD_OR, "Got good NETINFO cell from %s",
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safe_str(conn->_base.address));
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assert_connection_ok(TO_CONN(conn),time(NULL));
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}
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@ -1085,42 +1085,3 @@ connection_or_send_netinfo(or_connection_t *conn)
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return 0;
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}
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/** DOCDOC Called when we're done authenticating; act on stuff we
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* learned in netinfo. */
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int
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connection_or_act_on_netinfo(or_connection_t *conn)
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{
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long delta;
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/*XXXX020 merge this into handle_netinfo.*/
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if (!conn->handshake_state)
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return -1;
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tor_assert(conn->handshake_state->received_versions != 0);
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delta = conn->handshake_state->apparent_skew;
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/** Warn when we get a netinfo skew with at least this value. */
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#define NETINFO_NOTICE_SKEW 3600
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if (abs(delta) > NETINFO_NOTICE_SKEW &&
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router_get_by_digest(conn->identity_digest)) {
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char dbuf[64];
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/*XXXX020 not always warn!*/
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format_time_interval(dbuf, sizeof(dbuf), delta);
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log_fn(LOG_WARN, LD_HTTP, "Received NETINFO cell with skewed time from "
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"server at %s:%d. It seems that our clock is %s by %s, or "
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"that theirs is %s. Tor requires an accurate clock to work: "
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"please check your time and date settings.",
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conn->_base.address, (int)conn->_base.port,
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delta>0 ? "ahead" : "behind", dbuf,
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delta>0 ? "behind" : "ahead");
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control_event_general_status(LOG_WARN,
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"CLOCK_SKEW SKEW=%ld SOURCE=OR:%s:%d",
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delta, conn->_base.address, conn->_base.port);
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}
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if (conn->handshake_state->apparently_canonical)
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conn->is_canonical = 1;
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/* XXX020 possibly, learn my address from my_apparent_addr */
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return 0;
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}
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@ -893,11 +893,6 @@ typedef struct or_handshake_state_t {
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unsigned int started_here : 1;
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unsigned int received_versions : 1;
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/* from netinfo: XXXX020 totally useless. */
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unsigned int received_netinfo : 1;
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long apparent_skew;
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uint32_t my_apparent_addr;
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unsigned int apparently_canonical;
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} or_handshake_state_t;
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/** Subtype of connection_t for an "OR connection" -- that is, one that speaks
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@ -2870,7 +2865,6 @@ void cell_pack(packed_cell_t *dest, const cell_t *src);
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void var_cell_pack_header(const var_cell_t *cell, char *hdr_out);
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var_cell_t *var_cell_new(uint16_t payload_len);
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void var_cell_free(var_cell_t *cell);
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int connection_or_act_on_netinfo(or_connection_t *conn);
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/********************************* control.c ***************************/
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