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r14101@tombo: nickm | 2008-02-10 13:24:27 -0500

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Merge connection_or_act_on_netinfo into command.c; remove some fields from or_handshake_state().


svn:r13458
This commit is contained in:
Nick Mathewson 2008-02-10 18:40:23 +00:00
parent 8a7c4e6b62
commit a4db22f675
3 changed files with 31 additions and 62 deletions
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48
src/or/command.c
View File

@ -503,6 +503,9 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
uint8_t n_other_addrs;
time_t now = time(NULL);
long apparent_skew = 0;
uint32_t my_apparent_addr = 0;
if (conn->link_proto < 2) {
log_fn(LOG_PROTOCOL_WARN, LD_OR,
"Received a NETINFO cell on %s connection; dropping.",
@ -516,15 +519,10 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
}
tor_assert(conn->handshake_state &&
conn->handshake_state->received_versions);
if (conn->handshake_state->received_netinfo) {
log_fn(LOG_PROTOCOL_WARN, LD_OR,
"Received a duplicate NETINFO cell; dropping.");
return;
}
/* Decode the cell. */
timestamp = ntohl(get_uint32(cell->payload));
if (abs(now - conn->handshake_state->sent_versions_at) < 180) {
conn->handshake_state->apparent_skew = now - timestamp;
apparent_skew = now - timestamp;
}
my_addr_type = (uint8_t) cell->payload[4];
@ -538,7 +536,7 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
connection_mark_for_close(TO_CONN(conn));
return;
} else if (my_addr_type == RESOLVED_TYPE_IPV4 && my_addr_len == 4) {
conn->handshake_state->my_apparent_addr = ntohl(get_uint32(my_addr_ptr));
my_apparent_addr = ntohl(get_uint32(my_addr_ptr));
}
n_other_addrs = (uint8_t) *cp++;
@ -556,7 +554,7 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
if (other_addr_type == RESOLVED_TYPE_IPV4 && other_addr_len == 4) {
uint32_t addr = ntohl(get_uint32(cp));
if (addr == conn->real_addr) {
conn->handshake_state->apparently_canonical = 1;
conn->is_canonical = 1;
break;
}
}
@ -564,17 +562,33 @@ command_process_netinfo_cell(cell_t *cell, or_connection_t *conn)
--n_other_addrs;
}
conn->handshake_state->received_netinfo = 1;
if (conn->handshake_state->apparently_canonical) {
conn->is_canonical = 1;
/* Act on apparent skew. */
/** Warn when we get a netinfo skew with at least this value. */
#define NETINFO_NOTICE_SKEW 3600
if (abs(apparent_skew) > NETINFO_NOTICE_SKEW &&
router_get_by_digest(conn->identity_digest)) {
char dbuf[64];
/*XXXX020 not always warn!*/
format_time_interval(dbuf, sizeof(dbuf), apparent_skew);
log_fn(LOG_WARN, LD_HTTP, "Received NETINFO cell with skewed time from "
"server at %s:%d. It seems that our clock is %s by %s, or "
"that theirs is %s. Tor requires an accurate clock to work: "
"please check your time and date settings.",
conn->_base.address, (int)conn->_base.port,
apparent_skew>0 ? "ahead" : "behind", dbuf,
apparent_skew>0 ? "behind" : "ahead");
control_event_general_status(LOG_WARN,
"CLOCK_SKEW SKEW=%ld SOURCE=OR:%s:%d",
apparent_skew, conn->_base.address, conn->_base.port);
}
if (connection_or_act_on_netinfo(conn)<0 ||
connection_or_set_state_open(conn)<0)
connection_mark_for_close(TO_CONN(conn));
log_info(LD_OR, "Got good NETINFO cell from %s",
safe_str(conn->_base.address));
/*XXX020 maybe act on my_apparent_addr */
if (connection_or_set_state_open(conn)<0)
connection_mark_for_close(TO_CONN(conn));
else
log_info(LD_OR, "Got good NETINFO cell from %s",
safe_str(conn->_base.address));
assert_connection_ok(TO_CONN(conn),time(NULL));
}

39
src/or/connection_or.c
View File

@ -1085,42 +1085,3 @@ connection_or_send_netinfo(or_connection_t *conn)
return 0;
}
/** DOCDOC Called when we're done authenticating; act on stuff we
* learned in netinfo. */
int
connection_or_act_on_netinfo(or_connection_t *conn)
{
long delta;
/*XXXX020 merge this into handle_netinfo.*/
if (!conn->handshake_state)
return -1;
tor_assert(conn->handshake_state->received_versions != 0);
delta = conn->handshake_state->apparent_skew;
/** Warn when we get a netinfo skew with at least this value. */
#define NETINFO_NOTICE_SKEW 3600
if (abs(delta) > NETINFO_NOTICE_SKEW &&
router_get_by_digest(conn->identity_digest)) {
char dbuf[64];
/*XXXX020 not always warn!*/
format_time_interval(dbuf, sizeof(dbuf), delta);
log_fn(LOG_WARN, LD_HTTP, "Received NETINFO cell with skewed time from "
"server at %s:%d. It seems that our clock is %s by %s, or "
"that theirs is %s. Tor requires an accurate clock to work: "
"please check your time and date settings.",
conn->_base.address, (int)conn->_base.port,
delta>0 ? "ahead" : "behind", dbuf,
delta>0 ? "behind" : "ahead");
control_event_general_status(LOG_WARN,
"CLOCK_SKEW SKEW=%ld SOURCE=OR:%s:%d",
delta, conn->_base.address, conn->_base.port);
}
if (conn->handshake_state->apparently_canonical)
conn->is_canonical = 1;
/* XXX020 possibly, learn my address from my_apparent_addr */
return 0;
}

6
src/or/or.h
View File

@ -893,11 +893,6 @@ typedef struct or_handshake_state_t {
unsigned int started_here : 1;
unsigned int received_versions : 1;
/* from netinfo: XXXX020 totally useless. */
unsigned int received_netinfo : 1;
long apparent_skew;
uint32_t my_apparent_addr;
unsigned int apparently_canonical;
} or_handshake_state_t;
/** Subtype of connection_t for an "OR connection" -- that is, one that speaks
@ -2870,7 +2865,6 @@ void cell_pack(packed_cell_t *dest, const cell_t *src);
void var_cell_pack_header(const var_cell_t *cell, char *hdr_out);
var_cell_t *var_cell_new(uint16_t payload_len);
void var_cell_free(var_cell_t *cell);
int connection_or_act_on_netinfo(or_connection_t *conn);
/********************************* control.c ***************************/