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Add ORCONN event pubsub system

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Add a publish-subscribe subsystem to publish messages about changes to
OR connections.

connection_or_change_state() in connection_or.c and
control_event_or_conn_event() in control.c publish messages to this
subsystem via helper functions.

Move state constants from connection_or.h to orconn_state.h so that
subscribers don't have to include all of connection_or.h to take
actions based on changes in OR connection state.  Move event constants
from control.h for similar reasons.

Part of ticket 27167.
This commit is contained in:
Taylor Yu
2018-12-16 16:05:58 -06:00
parent 308dde0c38
commit 271b50f54a
10 changed files with 288 additions and 49 deletions
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src/core/include.am
+3
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@@ -39,6 +39,7 @@ LIBTOR_APP_A_SOURCES = \
src/core/or/connection_or.c \
src/core/or/dos.c \
src/core/or/onion.c \
src/core/or/orconn_event.c \
src/core/or/policies.c \
src/core/or/protover.c \
src/core/or/protover_rust.c \
@@ -238,6 +239,8 @@ noinst_HEADERS += \
src/core/or/listener_connection_st.h \
src/core/or/onion.h \
src/core/or/or.h \
src/core/or/orconn_event.h \
src/core/or/orconn_event_sys.h \
src/core/or/or_circuit_st.h \
src/core/or/or_connection_st.h \
src/core/or/or_handshake_certs_st.h \