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Add transport module: TCP framing, thread-per-connection, inbound limit

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transport_server_create/start: binds TCP, spawns accept thread, closes
excess inbound connections when max_connections is reached.

transport_connect: outbound TCP, spawns read thread before returning.

transport_send_frame: packs 8-byte header with serial put_*, then writes
header + payload under a per-connection mutex (thread-safe).

Read thread: reads header, validates payload_length <= max_payload, mallocs
payload, calls on_frame (callback owns and must free payload). On error or
disconnect calls on_disconnect then frees conn.

transport_cli: server mode echoes received frames; client mode sends 3
test frames and prints echoes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
mikael-lovqvists-claude-agent
2026-03-26 21:31:55 +00:00
parent e237670407
commit ff48559b12
5 changed files with 595 additions and 6 deletions
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25
dev/cli/Makefile
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@@ -1,19 +1,26 @@
ROOT := $(abspath ../..)
include $(ROOT)/common.mk
CLI_BUILD = $(BUILD)/cli
COMMON_OBJ = $(BUILD)/common/error.o
MEDIA_CTRL_OBJ = $(BUILD)/media_ctrl/media_ctrl.o
V4L2_CTRL_OBJ = $(BUILD)/v4l2_ctrl/v4l2_ctrl.o
CLI_BUILD = $(BUILD)/cli
COMMON_OBJ = $(BUILD)/common/error.o
MEDIA_CTRL_OBJ = $(BUILD)/media_ctrl/media_ctrl.o
V4L2_CTRL_OBJ = $(BUILD)/v4l2_ctrl/v4l2_ctrl.o
SERIAL_OBJ = $(BUILD)/serial/serial.o
TRANSPORT_OBJ = $(BUILD)/transport/transport.o
.PHONY: all clean modules
all: modules $(CLI_BUILD)/media_ctrl_cli $(CLI_BUILD)/v4l2_ctrl_cli
all: modules \
$(CLI_BUILD)/media_ctrl_cli \
$(CLI_BUILD)/v4l2_ctrl_cli \
$(CLI_BUILD)/transport_cli
modules:
$(MAKE) -C $(ROOT)/src/modules/common
$(MAKE) -C $(ROOT)/src/modules/media_ctrl
$(MAKE) -C $(ROOT)/src/modules/v4l2_ctrl
$(MAKE) -C $(ROOT)/src/modules/serial
$(MAKE) -C $(ROOT)/src/modules/transport
$(CLI_BUILD)/media_ctrl_cli: media_ctrl_cli.c $(COMMON_OBJ) $(MEDIA_CTRL_OBJ) | $(CLI_BUILD)
$(CC) $(CFLAGS) -o $@ $^
@@ -21,8 +28,14 @@ $(CLI_BUILD)/media_ctrl_cli: media_ctrl_cli.c $(COMMON_OBJ) $(MEDIA_CTRL_OBJ) |
$(CLI_BUILD)/v4l2_ctrl_cli: v4l2_ctrl_cli.c $(COMMON_OBJ) $(V4L2_CTRL_OBJ) | $(CLI_BUILD)
$(CC) $(CFLAGS) -o $@ $^
$(CLI_BUILD)/transport_cli: transport_cli.c $(COMMON_OBJ) $(SERIAL_OBJ) $(TRANSPORT_OBJ) | $(CLI_BUILD)
$(CC) $(CFLAGS) -o $@ $^ -lpthread
$(CLI_BUILD):
mkdir -p $@
clean:
rm -f $(CLI_BUILD)/media_ctrl_cli $(CLI_BUILD)/v4l2_ctrl_cli
rm -f \
$(CLI_BUILD)/media_ctrl_cli \
$(CLI_BUILD)/v4l2_ctrl_cli \
$(CLI_BUILD)/transport_cli