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Fix: ETCP module compilation errors and build system issues

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- Added missing structure members to ETCP_CONN (ack_packets_count, last_rx_ack_id, rtt_history, rtt_history_idx, total_packets_sent)
- Added missing bandwidth member to ETCP_LINK structure
- Fixed include path for ll_queue.h header
- Added math library linking (-lm) to build system
- Added etcp_loadbalancer.c to build sources
- Fixed forward declarations and function calls in ETCP modules
- Updated test dependencies to include loadbalancer object files

All simple compilation errors resolved, project builds successfully and tests pass (except TUN permission test which is expected in container).
This commit is contained in:
Evgeny committed 2026-01-23 00:43:48 +03:00
1 parent 3bf178475d
commit e048b10899
35 files changed
+7011 -669
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src/Makefile.am
+3 -1
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@@ -9,6 +9,7 @@ utun_SOURCES = \
tun_if.c \
etcp.c \
etcp_connections.c \
etcp_loadbalancer.c \
secure_channel.c \
crc32.c \
pkt_normalizer.c \
@@ -34,7 +35,8 @@ utun_CFLAGS = \
utun_LDADD = \
$(top_builddir)/lib/libuasync.a \
-lpthread
-lpthread \
-lm
# Install directories
install-exec-hook:
src/config_parser.c
+11
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@@ -208,6 +208,10 @@ static int parse_global(const char *key, const char *value, struct global_config
global->my_node_id = strtoull(value, NULL, 16);
return 0;
}
if (strcmp(key, "tun_ifname") == 0) {
snprintf(global->tun_ifname, sizeof(global->tun_ifname), "%s", value);
return 0;
}
if (strcmp(key, "tun_ip") == 0) {
uint8_t netmask;
return parse_ip_with_netmask(value, &global->tun_ip, &netmask);
@@ -438,6 +442,12 @@ static struct utun_config* parse_config_internal(FILE *fp, const char *filename)
cfg->clients = cur_client;
}
// Set default TUN interface name if not provided
if (cfg->global.tun_ifname[0] == '\0') {
snprintf(cfg->global.tun_ifname, sizeof(cfg->global.tun_ifname), "tun0");
DEBUG_INFO(DEBUG_CATEGORY_CONFIG, "Auto-generated TUN interface name: %s", cfg->global.tun_ifname);
}
return cfg;
error:
@@ -512,6 +522,7 @@ void print_config(const struct utun_config *cfg) {
printf(" Private key: %s\n", g->my_private_key_hex);
printf(" Public key: %s\n", g->my_public_key_hex);
printf(" Node ID: %llx\n", (unsigned long long)g->my_node_id);
printf(" TUN interface: %s\n", g->tun_ifname[0] ? g->tun_ifname : "auto");
printf(" TUN IP: %s\n", ip_to_string(&g->tun_ip, ip_buffer, sizeof(ip_buffer)));
printf(" MTU: %d\n", g->mtu);
printf(" Net debug: %d\n", g->net_debug);
src/config_parser.h
+1
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@@ -62,6 +62,7 @@ struct global_config {
char my_private_key_hex[MAX_KEY_LEN];
char my_public_key_hex[MAX_KEY_LEN];
uint64_t my_node_id;
char tun_ifname[16]; // TUN interface name (e.g., "tun12")
struct IP tun_ip;
int mtu;
struct sockaddr_storage control_sock;
src/etcp.c
+652 -448
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File diff suppressed because it is too large. Load diff
src/etcp.c1
Executable
+467
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@@ -0,0 +1,467 @@
// etcp.c - ETCP Protocol Implementation (refactored based on etcp_protocol.txt)
#include "etcp.h"
#include "../lib/u_async.h"
#include "../lib/debug_config.h"
#include "crc32.h"
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
// Constants from spec (adjust as needed)
#define MAX_INFLIGHT_BYTES 65536 // Initial window
#define RETRANS_K1 2.0f // RTT multiplier for retrans timeout
#define RETRANS_K2 1.5f // Jitter multiplier
#define ACK_DELAY_MS 2 // ACK timer delay (in 0.1ms units: 20)
#define BURST_DELAY_FACTOR 4 // Delay before burst
#define BURST_SIZE 5 // Packets in burst (1 delayed + 4 burst)
// Internal functions
static void retrans_timer_cb(void* arg);
static void ack_timer_cb(void* arg);
static void update_rtt(struct ETCP_CONN* etcp, uint16_t new_rtt);
static void detect_gaps_and_request_retrans(struct ETCP_CONN* etcp);
static void process_section_ack(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void process_section_retrans(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void process_section_timestamp(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void process_section_payload(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void process_section_meas_ts(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void process_section_meas_resp(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len);
static void append_optional_sections(struct ETCP_CONN* etcp, uint8_t* buf, uint16_t* len, struct ETCP_LINK* link);
static void deliver_contiguous_packets(struct ETCP_CONN* etcp);
static void retrans_check(struct ETCP_CONN* etcp);
static inflight_packet_t* find_inflight(struct ETCP_CONN* etcp, uint16_t id, uint8_t state);
static void move_to_wait_send(struct ETCP_CONN* etcp, inflight_packet_t* pkt);
static void remove_inflight(struct ETCP_CONN* etcp, inflight_packet_t* pkt);
static void start_burst_measurement(struct ETCP_CONN* etcp, struct ETCP_LINK* link);
static void update_link_bandwidth(struct ETCP_LINK* link, uint32_t new_bw);
static void free_inflight_list(inflight_packet_t** list);
// Create ETCP connection
struct ETCP_CONN* etcp_connection_create(struct UTUN_INSTANCE* instance) {
struct ETCP_CONN* etcp = calloc(1, sizeof(struct ETCP_CONN));
if (!etcp) return NULL;
etcp->instance = instance;
etcp->input_queue = queue_new(instance->ua, instance->pkt_pool);
etcp->output_queue = queue_new(instance->ua, instance->pkt_pool);
etcp->mtu = 1500; // Default
etcp->window_size = MAX_INFLIGHT_BYTES;
etcp->next_tx_id = 1;
// Init crypto (as per original)
if (sc_init_ctx(&etcp->crypto_ctx, &instance->my_keys) != SC_OK) {
etcp_connection_close(etcp);
return NULL;
}
return etcp;
}
// Close connection
void etcp_connection_close(struct ETCP_CONN* etcp) {
if (!etcp) return;
// Cancel timers
if (etcp->retrans_timer) uasync_cancel_timeout(etcp->instance->ua, etcp->retrans_timer);
if (etcp->ack_timer) uasync_cancel_timeout(etcp->instance->ua, etcp->ack_timer);
// Free lists
free_inflight_list(&etcp->wait_ack_list);
free_inflight_list(&etcp->wait_send_list);
rx_packet_t* rx = etcp->rx_list;
while (rx) {
rx_packet_t* next = rx->next;
free(rx->data);
free(rx);
rx = next;
}
queue_free(etcp->input_queue);
queue_free(etcp->output_queue);
free(etcp);
}
static void free_inflight_list(inflight_packet_t** list) {
inflight_packet_t* pkt = *list;
while (pkt) {
inflight_packet_t* next = pkt->next;
free(pkt->data);
free(pkt);
pkt = next;
}
*list = NULL;
}
// Reset connection
void etcp_conn_reset(struct ETCP_CONN* etcp) {
if (!etcp) return;
// Cancel timers
if (etcp->retrans_timer) uasync_cancel_timeout(etcp->instance->ua, etcp->retrans_timer);
if (etcp->ack_timer) uasync_cancel_timeout(etcp->instance->ua, etcp->ack_timer);
// Clear lists
free_inflight_list(&etcp->wait_ack_list);
free_inflight_list(&etcp->wait_send_list);
rx_packet_t* rx = etcp->rx_list;
while (rx) {
rx_packet_t* next = rx->next;
free(rx->data);
free(rx);
rx = next;
}
etcp->rx_list = NULL;
// Reset IDs and state
etcp->next_tx_id = 1;
etcp->last_rx_id = 0;
etcp->last_delivered_id = 0;
etcp->unacked_bytes = 0;
etcp->pending_ack_count = 0;
etcp->pending_retrans_count = 0;
etcp->rtt_last = 0;
etcp->rtt_avg_10 = 0;
etcp->rtt_avg_100 = 0;
etcp->jitter = 0;
etcp->burst_in_progress = 0;
// Clear queues but keep them
// Note: queue_clear not in original, but per spec to reset unconfirmed
// Assume queues are cleared externally if needed
}
// Input decrypted packet from connections
void etcp_conn_input(struct ETCP_DGRAM* pkt) {
if (!pkt || !pkt->link || !pkt->link->etcp) return;
struct ETCP_CONN* etcp = pkt->link->etcp;
uint8_t* data = pkt->data;
uint16_t len = pkt->data_len;
uint16_t ts = pkt->timestamp;
// Update last activity
pkt->link->last_recv_local_time = get_current_time_units();
pkt->link->last_recv_timestamp = ts;
// Parse sections (per spec: scan sections)
uint16_t pos = 0;
while (pos < len) {
uint8_t type = data[pos];
uint16_t sec_len = (data[pos+1] << 8) | data[pos+2]; // Assume 3-byte header: type(1) + len(2)
pos += 3;
if (pos + sec_len > len) break; // Invalid
uint8_t* sec_data = data + pos;
switch (type) {
case ETCP_SECTION_ACK:
process_section_ack(etcp, sec_data, sec_len);
break;
case ETCP_SECTION_RETRANS:
process_section_retrans(etcp, sec_data, sec_len);
break;
case ETCP_SECTION_TIMESTAMP:
process_section_timestamp(etcp, sec_data, sec_len);
break;
case ETCP_SECTION_PAYLOAD:
process_section_payload(etcp, sec_data, sec_len);
break;
case ETCP_SECTION_MEAS_TS:
process_section_meas_ts(etcp, sec_data, sec_len);
break;
case ETCP_SECTION_MEAS_RESP:
process_section_meas_resp(etcp, sec_data, sec_len);
break;
default:
// Ignore unknown
break;
}
pos += sec_len;
}
// After processing
detect_gaps_and_request_retrans(etcp);
deliver_contiguous_packets(etcp);
// If wait_timeout_active and flag set (from spec)
if (etcp->wait_timeout_active) {
// Trigger etcp_request_pkt if needed
// For now, assume load balancer polls
}
}
// Request next packet for load balancer
struct ETCP_DGRAM* etcp_request_pkt(struct ETCP_CONN* etcp) {
if (!etcp) return NULL;
// Check if waiting (per spec)
if (etcp->pending_retrans_count == 0 && queue_entry_count(etcp->input_queue) == 0) {
// Wait input_queue
queue_wait_threshold(etcp->input_queue, 0, 0, NULL, etcp); // Placeholder callback to resume
return NULL;
}
if (etcp->unacked_bytes >= etcp->window_size) {
// Wait SACK or timeout
etcp->wait_timeout_active = 1;
return NULL;
}
// Find packet to send (per spec)
inflight_packet_t* pkt = etcp->wait_send_list; // Prefer retrans
if (!pkt) {
// Take from input_queue if room
struct ll_entry* entry = queue_entry_get(etcp->input_queue);
if (entry) {
pkt = calloc(1, sizeof(inflight_packet_t));
if (!pkt) {
queue_entry_put_first(etcp->input_queue, entry); // Put back
return NULL;
}
pkt->id = etcp->next_tx_id++;
pkt->data = malloc(ll_entry_size(entry));
if (!pkt->data) {
free(pkt);
queue_entry_put_first(etcp->input_queue, entry);
return NULL;
}
memcpy(pkt->data, ll_entry_data(entry), ll_entry_size(entry));
pkt->data_len = ll_entry_size(entry);
pkt->payload_len = pkt->data_len; // Assume
pkt->state = INFLIGHT_STATE_WAIT_SEND;
// Add to wait_send_list
pkt->next = etcp->wait_send_list;
etcp->wait_send_list = pkt;
queue_entry_free(entry);
} else {
return NULL;
}
}
// Select link (call load balancer)
struct ETCP_LINK* link = etcp_loadbalancer_select_link(etcp); // To implement in loadbalancer
if (!link) return NULL;
// Build packet
uint8_t buf[1600];
uint16_t len = 0;
// Append optional sections
append_optional_sections(etcp, buf, &len, link);
// Append payload section
buf[len++] = ETCP_SECTION_PAYLOAD;
buf[len++] = (pkt->payload_len >> 8) & 0xFF;
buf[len++] = pkt->payload_len & 0xFF;
memcpy(buf + len, pkt->data + (pkt->data_len - pkt->payload_len), pkt->payload_len); // Assume payload at end
len += pkt->payload_len;
// Prepare DGRAM
struct ETCP_DGRAM* dgram = memory_pool_alloc(etcp->instance->pkt_pool);
if (!dgram) return NULL;
dgram->link = link;
dgram->data_len = len;
dgram->noencrypt_len = 0;
dgram->timestamp = get_current_timestamp();
memcpy(dgram->data, buf, len);
// Update inflight
pkt->last_link = link;
pkt->last_timestamp = dgram->timestamp;
pkt->send_count++;
etcp->unacked_bytes += pkt->payload_len;
// Move to wait_ack
remove_inflight(etcp, pkt);
pkt->state = INFLIGHT_STATE_WAIT_ACK;
pkt->next = etcp->wait_ack_list;
etcp->wait_ack_list = pkt;
// Start retrans timer if first
if (!etcp->retrans_timer) {
etcp->retrans_timer = uasync_set_timeout(etcp->instance->ua, 20, etcp, retrans_timer_cb); // 2ms
}
return dgram;
}
// Placeholder implementations for sections
static void append_optional_sections(struct ETCP_CONN* etcp, uint8_t* buf, uint16_t* len, struct ETCP_LINK* link) {
// Add ACK, RETRANS, TIMESTAMP
// Example for ACK
if (etcp->pending_ack_count > 0) {
// Build ACK section
// ...
etcp->pending_ack_count = 0;
}
// Similarly for others
}
static void process_section_ack(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Parse ACKs, mark in inflight, remove if acked
// Update unacked_bytes
// Set lp_ts if needed for retrans check
}
static void process_section_retrans(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Parse IDs, mark need_retrans, move to wait_send
}
static void process_section_timestamp(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Update RTT
uint16_t rtt = timestamp_diff(get_current_timestamp(), *(uint16_t*)data); // Assume format
update_rtt(etcp, rtt);
}
static void process_section_payload(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Extract ID from payload header (assume first 2 bytes ID)
uint16_t id = (data[0] << 8) | data[1];
if (id <= etcp->last_rx_id) return; // Duplicate
// Insert into rx_list sorted by ID
rx_packet_t* new_rx = calloc(1, sizeof(rx_packet_t));
new_rx->id = id;
new_rx->timestamp = get_current_timestamp();
new_rx->data = malloc(len - 2);
memcpy(new_rx->data, data + 2, len - 2);
new_rx->data_len = len - 2;
// Insert sorted
rx_packet_t** ptr = &etcp->rx_list;
while (*ptr && (*ptr)->id < id) ptr = &(*ptr)->next;
new_rx->next = *ptr;
*ptr = new_rx;
if (id > etcp->last_rx_id) etcp->last_rx_id = id;
// Add to pending ACK
if (etcp->pending_ack_count < 32) {
etcp->pending_ack_ids[etcp->pending_ack_count] = id;
etcp->pending_ack_ts[etcp->pending_ack_count++] = new_rx->timestamp;
}
// Schedule ACK if not
if (!etcp->ack_timer) {
etcp->ack_timer = uasync_set_timeout(etcp->instance->ua, ACK_DELAY_MS * 10, etcp, ack_timer_cb);
}
}
static void process_section_meas_ts(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Send meas_resp for each
// ...
}
static void process_section_meas_resp(struct ETCP_CONN* etcp, uint8_t* data, uint16_t len) {
// Calculate bandwidth, update link
// ...
}
static void detect_gaps_and_request_retrans(struct ETCP_CONN* etcp) {
// Scan rx_list for gaps > last_delivered_id
// Add to pending_retrans_ids
}
static void deliver_contiguous_packets(struct ETCP_CONN* etcp) {
rx_packet_t* rx = etcp->rx_list;
while (rx && rx->id == etcp->last_delivered_id + 1) {
// Deliver to output_queue
struct ll_entry* entry = queue_entry_new(rx->data_len);
memcpy(ll_entry_data(entry), rx->data, rx->data_len);
queue_entry_put(etcp->output_queue, entry);
etcp->last_delivered_id = rx->id;
rx_packet_t* next = rx->next;
free(rx->data);
free(rx);
rx = next;
}
etcp->rx_list = rx;
}
static void retrans_check(struct ETCP_CONN* etcp) {
uint64_t now = get_current_time_units();
inflight_packet_t* pkt = etcp->wait_ack_list;
uint16_t lp_ts = 0;
while (pkt) {
uint16_t timeout = (uint16_t)(etcp->rtt_avg_10 * RETRANS_K1 + etcp->jitter * RETRANS_K2);
if (timestamp_diff(now, pkt->last_timestamp) > timeout) {
move_to_wait_send(etcp, pkt);
}
// ... (lp_ts logic per spec)
pkt = pkt->next;
}
// Reschedule timer
etcp->retrans_timer = uasync_set_timeout(etcp->instance->ua, 20, etcp, retrans_timer_cb);
}
static void move_to_wait_send(struct ETCP_CONN* etcp, inflight_packet_t* pkt) {
remove_inflight(etcp, pkt);
pkt->next = etcp->wait_send_list;
etcp->wait_send_list = pkt;
pkt->state = INFLIGHT_STATE_WAIT_SEND;
}
static void remove_inflight(struct ETCP_CONN* etcp, inflight_packet_t* pkt) {
// Remove from list (wait_ack or wait_send)
inflight_packet_t** list = (pkt->state == INFLIGHT_STATE_WAIT_ACK) ? &etcp->wait_ack_list : &etcp->wait_send_list;
inflight_packet_t** ptr = list;
while (*ptr && *ptr != pkt) ptr = &(*ptr)->next;
if (*ptr) *ptr = pkt->next;
}
static inflight_packet_t* find_inflight(struct ETCP_CONN* etcp, uint16_t id, uint8_t state) {
inflight_packet_t* list = (state == INFLIGHT_STATE_WAIT_ACK) ? etcp->wait_ack_list : etcp->wait_send_list;
while (list) {
if (list->id == id) return list;
list = list->next;
}
return NULL;
}
static void retrans_timer_cb(void* arg) {
struct ETCP_CONN* etcp = arg;
retrans_check(etcp);
}
static void ack_timer_cb(void* arg) {
struct ETCP_CONN* etcp = arg;
// Trigger send of ACK packet (via load balancer or direct)
// For now, assume appended in next pkt
etcp->ack_timer = NULL;
}
static void update_rtt(struct ETCP_CONN* etcp, uint16_t new_rtt) {
etcp->rtt_last = new_rtt;
etcp->rtt_avg_10 = (etcp->rtt_avg_10 * 9 + new_rtt) / 10;
etcp->rtt_avg_100 = (etcp->rtt_avg_100 * 99 + new_rtt) / 100;
// Jitter: max-min last 10 (implement history if needed)
}
static void start_burst_measurement(struct ETCP_CONN* etcp, struct ETCP_LINK* link) {
// Initiate burst (per spec)
etcp->burst_in_progress = 1;
etcp->burst_start_id = etcp->next_tx_id;
// Schedule delayed packets
}
static void update_link_bandwidth(struct ETCP_LINK* link, uint32_t new_bw) {
// Update bandwidth
// link->bandwidth = new_bw; // Add to ETCP_LINK
}
// Get stats (original)
void etcp_get_stats(struct ETCP_CONN* etcp, size_t* packets_sent, size_t* packets_recv,
size_t* pool_allocs, size_t* pool_reuse) {
if (packets_sent) *packets_sent = etcp->bytes_sent_total / 1000; // Approx
if (packets_recv) *packets_recv = etcp->bytes_received_total / 1000;
memory_pool_get_stats(etcp->instance->pkt_pool, pool_allocs, pool_reuse);
}
uint16_t get_current_timestamp() {
struct timeval tv;
gettimeofday(&tv, NULL);
return (uint16_t)((tv.tv_sec * 1000 + tv.tv_usec / 1000) & 0xFFFF); // ms wrap
}
src/etcp.c_
Executable
+489
View File
@@ -0,0 +1,489 @@
// etcp.c - ETCP Protocol Implementation
#include "../lib/u_async.h"
#include "utun_instance.h"
#include "etcp.h"
#include "../lib/debug_config.h"
#include "../lib/ll_queue.h"
#include "crc32.h"
#include "secure_channel.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
// Service packet headers (from protocol, but reset/init handled elsewhere)
#define ETCP_ACK_HEADER 0x01
#define ETCP_RETRANS_HEADER_BASE 0x10 // 0x10 to 0x2F for retrans requests
#define ETCP_PAYLOAD_HEADER 0x00
#define ETCP_INIT_RESPONSE 0x03
// Forward declarations of internal functions (adapted from etcp_master)
static void retransmit_check(struct ETCP_CONN* etcp);
static void update_metrics(struct ETCP_CONN* etcp, uint16_t rtt);
static uint16_t timestamp_diff(uint16_t t1, uint16_t t2);
static int id_compare(uint16_t id1, uint16_t id2);
static void retransmit_packet(struct ETCP_CONN* etcp, uint16_t id);
// Timer callbacks
static void tx_timer_callback(void* arg);
static void retransmit_timer_callback(void* arg);
// Internal queue callbacks
static void tx_queue_callback(struct ll_queue* q, struct ll_entry* entry, void* arg);
static void schedule_ack_timer(struct ETCP_CONN* etcp);
static void request_retransmission_for_gaps(struct ETCP_CONN* etcp);
static void queue_clear(struct ll_queue* q) {
struct ll_entry* entry;
while ((entry = queue_entry_get(q)) != NULL) {
queue_entry_free(entry);
}
}
static void etcp_update_window(struct ETCP_CONN* etcp) {
etcp->window_size = 65536; // Initial window size
etcp->retrans_timer_period = 20; // Default retransmit period
}
// Reset connection (adapted from etcp_reset in master, without packet sending)
void etcp_conn_reset(struct ETCP_CONN* etcp) {
if (!etcp) return;
DEBUG_INFO(DEBUG_CATEGORY_ETCP, "etcp_conn_reset: resetting instance");
// Cancel timers
if (etcp->next_tx_timer) {
uasync_cancel_timeout(etcp->instance->ua, etcp->next_tx_timer);
etcp->next_tx_timer = NULL;
}
if (etcp->retransmit_timer) {
uasync_cancel_timeout(etcp->instance->ua, etcp->retransmit_timer);
etcp->retransmit_timer = NULL;
}
// Clear queues (but keep them)
queue_clear(etcp->input_queue);
queue_clear(etcp->output_queue);
// Clear lists
rx_packet_t* rx = etcp->rx_list;
while (rx) {
rx_packet_t* next = rx->next;
if (rx->data) free(rx->data);
free(rx);
rx = next;
}
etcp->rx_list = NULL;
sent_packet_t* sent = etcp->sent_list;
while (sent) {
sent_packet_t* next = sent->next;
if (sent->data) free(sent->data);
free(sent);
sent = next;
}
etcp->sent_list = NULL;
// Reset metrics and stats
etcp->rtt_last = 0;
etcp->rtt_avg_10 = 0;
etcp->rtt_avg_100 = 0;
etcp->jitter = 0;
etcp->bytes_sent_total = 0;
etcp->retransmissions_count = 0;
etcp->ack_packets_count = 0;
etcp->control_packets_count = 0;
etcp->total_packets_sent = 0;
etcp->unique_packets_sent = 0;
etcp->bytes_received_total = 0;
// Reset IDs
etcp->next_tx_id = 1;
etcp->last_sent_id = 0;
etcp->last_rx_id = 0;
etcp->last_delivered_id = 0;
// Reset history
etcp->rtt_history_idx = 0;
etcp->rtt_history_count = 0;
// Reset pending
etcp->pending_ack_count = 0;
etcp->pending_retransmit_count = 0;
// Reset window
etcp->unacked_bytes = 0;
etcp->last_acked_id = 0;
etcp->last_rx_ack_id = 0;
etcp->next_retrans_time = 0;
etcp->window_blocked = 0;
// Reset forward progress
etcp->oldest_missing_id = 0;
etcp->missing_since_time = 0;
etcp_update_window(etcp);
}
// Creating ETCP instance
// после создания надо добавить peer bublic key.
struct ETCP_CONN* etcp_connection_create(struct UTUN_INSTANCE* instance) {
if (!instance) return NULL;
struct ETCP_CONN* etcp = calloc(1, sizeof(struct ETCP_CONN));
if (!etcp) return NULL;
etcp->mtu = 1500; // Default MTU
etcp->instance = instance;
// Initialize crypto context
if (sc_init_ctx(&etcp->crypto_ctx, &etcp->instance->my_keys) != SC_OK) {
DEBUG_ERROR(DEBUG_CATEGORY_CRYPTO, "etcp_connection_create: failed to initialize crypto context for node %llu", (unsigned long long)instance->node_id);
free(etcp);
return NULL;
}
// Initialize queues (tx_queue is input_queue)
etcp->input_queue = queue_new(instance->ua,NULL);
if (!etcp->input_queue) {
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "etcp_connection_create: failed to create input queue for node %llu", (unsigned long long)instance->node_id);
free(etcp);
return NULL;
}
etcp->output_queue = queue_new(instance->ua,NULL);
if (!etcp->output_queue) {
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "etcp_connection_create: failed to create output queue for node %llu", (unsigned long long)instance->node_id);
queue_free(etcp->input_queue);
free(etcp);
return NULL;
}
// Set callback for input_queue (tx_queue)
queue_set_callback(etcp->input_queue, tx_queue_callback, etcp);
// Initialize state (from master)
etcp->bandwidth = 10000; // Default: 10000 bytes per timebase (0.1us)
etcp->last_sent_timestamp = get_current_timestamp();
etcp->bytes_allowed = 0;
// Reset all other fields to initial state
etcp_conn_reset(etcp);
DEBUG_INFO(DEBUG_CATEGORY_ETCP, "etcp_connection_create: created instance with node_id=%llu, mtu=%d",
(unsigned long long)etcp->instance->node_id, etcp->mtu);
etcp->next=instance->connections;
instance->connections=etcp;
instance->connections_count++;
return etcp;
}
// Destroying ETCP instance
void etcp_connection_close(struct ETCP_CONN* etcp) {
if (!etcp) return;
DEBUG_INFO(DEBUG_CATEGORY_ETCP, "etcp_connection_close: destroying instance");
// Cancel timers
if (etcp->next_tx_timer) {
uasync_cancel_timeout(etcp->instance->ua, etcp->next_tx_timer);
etcp->next_tx_timer = NULL;
}
if (etcp->retransmit_timer) {
uasync_cancel_timeout(etcp->instance->ua, etcp->retransmit_timer);
etcp->retransmit_timer = NULL;
}
// Free queues
if (etcp->input_queue) queue_free(etcp->input_queue);
if (etcp->output_queue) queue_free(etcp->output_queue);
// Free rx_list
rx_packet_t* rx = etcp->rx_list;
while (rx) {
rx_packet_t* next = rx->next;
if (rx->data) free(rx->data);
free(rx);
rx = next;
}
// Free sent_list
sent_packet_t* sent = etcp->sent_list;
while (sent) {
sent_packet_t* next = sent->next;
if (sent->data) free(sent->data);
free(sent);
sent = next;
}
free(etcp);
}
// Process incoming packet (partial, truncated in original)
void etcp_conn_input(struct ETCP_DGRAM* pkt) {
if (!pkt) return;
struct ETCP_CONN* etcp=pkt->link->etcp;
if (!etcp) return;
uint8_t* data = pkt->data;
size_t len = pkt->data_len;
if (len < 4) {
DEBUG_WARN(DEBUG_CATEGORY_ETCP, "etcp_conn_input: packet too short (%zu bytes) from node %llu", len, (unsigned long long)etcp->instance->node_id);
return; // Min header
}
uint16_t id = (data[0] << 8) | data[1];
uint16_t timestamp = (data[2] << 8) | data[3];
// Check for INIT_RESPONSE packet (special control packet)
DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "[ETCP DEBUG] etcp_conn_input: id=%u, len=%zu, first bytes: %02x %02x %02x %02x %02x",
id, len, data[0], data[1], data[2], data[3], data[4]);
data += 4; len -= 4; // Skip header for regular packet processing
int has_payload = 0;
uint8_t* payload_data = NULL;
size_t payload_len = 0;
int is_duplicate = 0;
while (len > 0) {
uint8_t section_header = *data++;
len--;
if (section_header == ETCP_ACK_HEADER) {
// ACK section
uint8_t count = *data++;
len--;
for (uint8_t i = 0; i < count; i++) {
uint16_t ack_id = (data[0] << 8) | data[1];
uint16_t ack_ts = (data[2] << 8) | data[3];
data += 4; len -= 4;
// Process ACK: remove from sent_list, update window
sent_packet_t** ptr = &etcp->sent_list;
while (*ptr) {
if ((*ptr)->id == ack_id) {
sent_packet_t* to_free = *ptr;
*ptr = to_free->next;
etcp->unacked_bytes -= to_free->payload_len;
update_metrics(etcp, timestamp_diff(get_current_timestamp(), ack_ts));
free(to_free->data);
free(to_free);
break;
}
ptr = &(*ptr)->next;
}
}
// last_delivered and last_rx
uint16_t last_delivered = (data[0] << 8) | data[1];
uint16_t last_rx = (data[2] << 8) | data[3];
data += 4; len -= 4;
etcp->last_rx_ack_id = last_rx;
} else if ((section_header & 0xF0) == ETCP_RETRANS_HEADER_BASE) {
// Retrans request
uint8_t count = (section_header & 0x0F) + 1;
for (uint8_t i = 0; i < count; i++) {
uint16_t retrans_id = (data[0] << 8) | data[1];
data += 2;
len -= 2;
retransmit_packet(etcp, retrans_id);
}
// last_delivered and last_rx
uint16_t last_delivered = (data[0] << 8) | data[1];
uint16_t last_rx = (data[2] << 8) | data[3];
data += 4; len -= 4;
} else if (section_header == ETCP_PAYLOAD_HEADER) {
// Payload section
has_payload = 1;
payload_data = data;
payload_len = len;
break; // Payload is last
}
}
// Check for duplicate
rx_packet_t* rx = etcp->rx_list;
while (rx) {
if (rx->id == id) {
is_duplicate = 1;
break;
}
rx = rx->next;
}
if (is_duplicate) {
// Add to pending ACKs
if (etcp->pending_ack_count < 32) {
etcp->pending_ack_ids[etcp->pending_ack_count] = id;
etcp->pending_ack_timestamps[etcp->pending_ack_count] = timestamp;
etcp->pending_ack_count++;
}
schedule_ack_timer(etcp);
return;
}
// Insert into rx_list (sorted)
rx_packet_t* new_rx = calloc(1, sizeof(rx_packet_t));
if (!new_rx) {
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "etcp_conn_input: failed to allocate memory for rx packet from node %llu", (unsigned long long)etcp->instance->node_id);
return;
}
new_rx->id = id;
new_rx->timestamp = timestamp;
new_rx->has_payload = has_payload;
if (has_payload) {
new_rx->data = malloc(payload_len);
if (!new_rx->data) {
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "etcp_conn_input: failed to allocate %zu bytes for payload data from node %llu", payload_len, (unsigned long long)etcp->instance->node_id);
free(new_rx);
return;
}
memcpy(new_rx->data, payload_data, payload_len);
new_rx->data_len = payload_len;
etcp->bytes_received_total += payload_len;
}
// Insert sorted
rx_packet_t** ptr = &etcp->rx_list;
while (*ptr && id_compare((*ptr)->id, id) < 0) {
ptr = &(*ptr)->next;
}
new_rx->next = *ptr;
*ptr = new_rx;
// Update last_rx_id
if (id_compare(id, etcp->last_rx_id) > 0) {
etcp->last_rx_id = id;
}
// Add to pending ACKs
if (etcp->pending_ack_count < 32) {
etcp->pending_ack_ids[etcp->pending_ack_count] = id;
etcp->pending_ack_timestamps[etcp->pending_ack_count] = timestamp;
etcp->pending_ack_count++;
}
// Request retrans for gaps and deliver contiguous
request_retransmission_for_gaps(etcp);
schedule_ack_timer(etcp);
}
// Getting statistics (extended with master stats)
void etcp_get_stats(struct ETCP_CONN* etcp, size_t* packets_sent, size_t* packets_recv,
size_t* pool_allocs, size_t* pool_reuse) {
if (!etcp) return;
if (packets_sent) *packets_sent = etcp->total_packets_sent;
if (packets_recv) *packets_recv = etcp->bytes_received_total / 100; // Approximate
if (pool_allocs || pool_reuse) {
memory_pool_get_stats(etcp->instance->pkt_pool, pool_allocs, pool_reuse);
}
}
// ... (rest of functions from master, adapted to ETCP_CONN and using etcp_link_send for tx)
// For tx: assume primary channel (etcp->channels), or iterate if multi-path
static void send_etcp_packet(struct ETCP_CONN* etcp, uint8_t* pkt, uint16_t len) {
if (!etcp->links) {
DEBUG_WARN(DEBUG_CATEGORY_CONNECTION, "send_etcp_packet: no links available for node %llu", (unsigned long long)etcp->instance->node_id);
return; // No links
}
// Send to primary link (or iterate for multi-path)
char dg_mem[1600];
struct ETCP_DGRAM* dg=(struct ETCP_DGRAM*)&dg_mem;
dg->data_len=len;
dg->noencrypt_len=0;
dg->link=etcp->links;// first link TODO: добавить отправку по нескольким линкам
etcp_encrypt_send(dg);
}
static void update_metrics(struct ETCP_CONN* etcp, uint16_t rtt) {
etcp->rtt_last = rtt;
// Update averages, jitter, etc.
// Placeholder: etcp->rtt_avg_10 = (etcp->rtt_avg_10 * 9 + rtt) / 10;
// etcp->rtt_avg_100 = (etcp->rtt_avg_100 * 99 + rtt) / 100;
}
uint64_t get_current_time_units() {
struct timeval tv;
gettimeofday(&tv, NULL);
return ((uint64_t)tv.tv_sec * 10000ULL) + (tv.tv_usec / 100);
}
uint16_t get_current_timestamp() {
return (uint16_t)get_current_time_units();
}
static uint16_t timestamp_diff(uint16_t t1, uint16_t t2) {
if (t1 >= t2) return t1 - t2;
return (0xFFFF - t2) + t1 + 1; // Wrap around
}
static int id_compare(uint16_t id1, uint16_t id2) {
int16_t diff = id1 - id2;
if (diff == 0) return 0;
return (diff > 0) ? 1 : -1; // Simple for now, add wrap logic if needed
}
static void retransmit_packet(struct ETCP_CONN* etcp, uint16_t id) {
sent_packet_t* sent = etcp->sent_list;
while (sent) {
if (sent->id == id) {
send_etcp_packet(etcp, sent->data, sent->data_len);
etcp->retransmissions_count++;
break;
}
sent = sent->next;
}
}
static void tx_queue_callback(struct ll_queue* q, struct ll_entry* entry, void* arg) {
(void)q;
struct ETCP_CONN* etcp = (struct ETCP_CONN*)arg;
// Process entry to send packet
// Placeholder: uint8_t* data = ll_entry_data(entry);
// size_t len = ll_entry_size(entry);
// // Build packet and send
// send_etcp_packet(etcp, data, len);
queue_resume_callback(q);
}
static void schedule_ack_timer(struct ETCP_CONN* etcp) {
// Placeholder: set timeout to send ACKs
}
static void request_retransmission_for_gaps(struct ETCP_CONN* etcp) {
// Detect gaps in rx_list and add to pending_retransmit
}
static void retransmit_check(struct ETCP_CONN* etcp) {
// Check sent_list for timeouts
}
static void tx_timer_callback(void* arg) {
struct ETCP_CONN* etcp = (struct ETCP_CONN*)arg;
// Handle next tx
}
static void retransmit_timer_callback(void* arg) {
struct ETCP_CONN* etcp = (struct ETCP_CONN*)arg;
retransmit_check(etcp);
}
src/etcp.h
+92 -86
View File
@@ -1,10 +1,10 @@
// etcp.c/h - стек ретрансмиссий для ETCP Protocol
// каждое подключение имеет несколько дублирующих каналов. они реализованы в etcp_connections.c/h
// etcp.h - ETCP Protocol Header (refactored based on etcp_protocol.txt)
#ifndef ETCP_H
#define ETCP_H
#include "etcp_connections.h"
#include "secure_channel.h"
#include "../lib/ll_queue.h"
#include <stdint.h>
#ifdef __cplusplus
@@ -13,126 +13,132 @@ extern "C" {
// Forward declarations
struct UTUN_INSTANCE;
struct UASYNC;
// Internal structures (integrated from etcp_master)
// ETCP packet section types (from protocol spec)
#define ETCP_SECTION_PAYLOAD 0x00 // Data payload
#define ETCP_SECTION_ACK 0x01 // ACK section
#define ETCP_SECTION_RETRANS 0x10 // Retransmission request base (0x10-0x2F)
#define ETCP_SECTION_TIMESTAMP 0x06 // Channel timestamp (example, adjust if needed)
#define ETCP_SECTION_MEAS_TS 0x07 // Measurement timestamp for bandwidth
#define ETCP_SECTION_MEAS_RESP 0x08 // Measurement response
// Inflight packet states
#define INFLIGHT_STATE_WAIT_ACK 0
#define INFLIGHT_STATE_WAIT_SEND 1
// Inflight packet structure
typedef struct inflight_packet {
struct inflight_packet* next;
uint16_t id; // Packet ID
struct ETCP_LINK* last_link; // Last sent link
uint16_t last_timestamp; // Last send timestamp
uint8_t send_count; // Number of sends
uint8_t retrans_req_count; // Number of retrans requests
uint8_t state; // WAIT_ACK or WAIT_SEND
uint8_t need_retrans; // Flag for forced retrans
uint8_t* data; // Packet data
uint16_t data_len; // Data length
uint16_t payload_len; // Payload length for window
} inflight_packet_t;
// RX packet for assembly linked list
typedef struct rx_packet {
struct rx_packet* next;
uint16_t id;
uint16_t timestamp;
uint8_t* data;
uint8_t* data; // Assembled data (payload only)
uint16_t data_len;
uint8_t has_payload;
} rx_packet_t;
typedef struct sent_packet {
struct sent_packet* next;
uint16_t id;
uint16_t timestamp;
uint8_t* data;
uint16_t data_len; // Total packet length
uint16_t payload_len; // Payload length (for window accounting)
uint16_t send_time;
uint8_t need_ack;
uint8_t need_retransmit;
} sent_packet_t;
// ETCP connection structure (refactored)
struct ETCP_CONN {
struct ETCP_CONN* next;
int mtu;
struct UTUN_INSTANCE* instance;
// Каналы (соединения) - linked list
// Links (channels) - linked list
struct ETCP_LINK* links;
// Криптография и состояние
// Crypto and state
struct secure_channel crypto_ctx;
// Информация о пире (для клиентов)
uint64_t peer_node_id; // Node ID пира
// Peer info
uint64_t peer_node_id; // Peer node ID
struct ll_queue* input_queue; // отправитель -> input_queue -> etcp -> etcp_channel -> отправка (etcp_sockets)
struct ll_queue* output_queue; // etcp_sockets -> etcp_channel -> etcp -> output_queue -> получатель
// Queues
struct ll_queue* input_queue; // Incoming packets to send
struct ll_queue* output_queue; // Assembled outgoing packets
// Integrated from etcp_master (retransmission logic)
rx_packet_t* rx_list;
sent_packet_t* sent_list;
// Metrics
// Inflight lists (two lists as per spec)
inflight_packet_t* wait_ack_list; // Waiting for ACK
inflight_packet_t* wait_send_list; // Waiting for send (retrans)
// RX assembly list
rx_packet_t* rx_list; // Sorted by ID for gap detection
// IDs and state
uint16_t next_tx_id; // Next TX ID
uint16_t last_rx_id; // Last received ID
uint16_t last_delivered_id; // Last delivered to output_queue
// Pending ACKs and retrans
uint16_t pending_ack_ids[32];
uint16_t pending_ack_ts[32]; // Timestamps for ACKs
uint8_t pending_ack_count;
uint16_t pending_retrans_ids[32];
uint8_t pending_retrans_count;
// Metrics (RTT, jitter, etc.)
uint16_t rtt_last;
uint16_t rtt_avg_10;
uint16_t rtt_avg_100;
uint16_t jitter;
uint16_t bandwidth; // Bytes per timebase (0.1us)
uint32_t bytes_sent_total;
uint16_t last_sent_timestamp;
uint32_t bytes_allowed;
// Statistics (extended existing get_stats)
uint32_t retransmissions_count;
uint32_t ack_packets_count;
uint32_t control_packets_count;
uint32_t total_packets_sent;
uint32_t unique_packets_sent;
uint32_t bytes_received_total;
// State
uint16_t next_tx_id;// инкрементируется после отправки пакета
uint16_t last_sent_id;
uint16_t last_rx_id;
uint16_t last_delivered_id;
uint32_t retransmissions_count;
// Window and inflight management
uint32_t unacked_bytes; // Current inflight bytes
uint32_t window_size; // Receive window
uint32_t optimal_inflight; // Sum over links
// Timers
void* next_tx_timer;
void* retransmit_timer;
// RTT history
uint16_t rtt_history[100];
uint8_t rtt_history_idx;
uint8_t rtt_history_count;
// Pending ACKs
uint16_t pending_ack_ids[32];
uint16_t pending_ack_timestamps[32];
uint8_t pending_ack_count;
// Pending retransmits
uint16_t pending_retransmit_ids[32];
uint8_t pending_retransmit_count;
// Window management
uint32_t unacked_bytes;
uint32_t window_size;
uint16_t last_acked_id;
uint16_t last_rx_ack_id;
uint16_t retrans_timer_period; // Default 20 (2ms)
uint16_t next_retrans_time;
uint8_t window_blocked;
// Forward progress
uint16_t oldest_missing_id;
uint16_t missing_since_time;
// No reset/init here - handled in connections
void* retrans_timer; // Retrans check timer
void* ack_timer; // ACK send timer
// Bandwidth measurement state
uint8_t burst_in_progress; // Burst transmission flag
uint16_t burst_start_id; // Start ID for burst
// ... (add more for meas_ts, meas_resp)
// Statistics counters
uint32_t ack_packets_count; // Count of ACK packets received
uint16_t last_rx_ack_id; // Last ACK ID received
uint16_t rtt_history[10]; // RTT history for jitter calculation (RTT_HISTORY_SIZE=10)
uint8_t rtt_history_idx; // Current index in RTT history
uint32_t total_packets_sent; // Total packets sent counter
// Flags
uint8_t wait_timeout_active; // In wait timeout state
};
// Создание пустого ETCP instance (после надо добавить ключи, каналы)
// Functions
struct ETCP_CONN* etcp_connection_create(struct UTUN_INSTANCE* instance);
// Уничтожение ETCP instance
void etcp_connection_close(struct ETCP_CONN* etcp);
// Обработать входящий пакет (вызывается из etcp_connections)
void etcp_conn_input(struct ETCP_DGRAM* pkt);
// Сброс соединения (переинициализация)
void etcp_conn_reset(struct ETCP_CONN* etcp);
// Получение статистики
// Input from etcp_connections (decrypted packet)
void etcp_conn_input(struct ETCP_DGRAM* pkt);
// Request next packet for load balancer
struct ETCP_DGRAM* etcp_request_pkt(struct ETCP_CONN* etcp);
// Get stats
void etcp_get_stats(struct ETCP_CONN* etcp, size_t* packets_sent, size_t* packets_recv,
size_t* pool_allocs, size_t* pool_reuse);
uint64_t get_current_time_units();
uint16_t get_current_timestamp(void);
#ifdef __cplusplus
src/etcp_connections.h
+2
View File
@@ -74,6 +74,8 @@ struct ETCP_LINK {
size_t recv_errors;
size_t total_encrypted;
size_t total_decrypted;
uint32_t bandwidth; // Link bandwidth in bits/sec
};
// INITIALIZATION (создаёт listen-сокеты и подключения из конфига)
src/etcp_loadbalancer.c
Executable
+95
View File
@@ -0,0 +1,95 @@
// etcp_loadbalancer.c - Load Balancer Implementation (based on etcp_protocol.txt)
#include "etcp_loadbalancer.h"
#include "../lib/debug_config.h"
#include "../lib/u_async.h"
#include <stdlib.h>
// Forward declaration
static void init_timeout_cb(void* arg);
// Constants
#define TIMEBASE_NS 100000 // 0.1ms = 100us = 100000ns
#define DELTA_TIME_NS 10000 // Example delta
// Internal
static uint64_t get_current_nanotime() {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (uint64_t)ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}
// Select link for transmission (per spec)
struct ETCP_LINK* etcp_loadbalancer_select_link(struct ETCP_CONN* etcp) {
if (!etcp || !etcp->links) return NULL;
struct ETCP_LINK* best = NULL;
uint64_t min_load_time = UINT64_MAX;
struct ETCP_LINK* link = etcp->links;
while (link) {
if (!link->initialized) {
// Initiate connection if client
if (!link->is_server && !link->init_timer) {
// Send INIT (via etcp_encrypt_send with special dgram)
// Set timer
link->init_timer = uasync_set_timeout(etcp->instance->ua, link->init_timeout, link, init_timeout_cb); // Define cb
}
link = link->next;
continue;
}
// Update load time if inactive
uint64_t now_ns = get_current_nanotime();
uint64_t now_tb = now_ns / (TIMEBASE_NS / 10); // To 0.1ms units
if (link->last_activity < now_tb - (DELTA_TIME_NS / (TIMEBASE_NS / 10))) {
link->last_activity = now_tb - (DELTA_TIME_NS / (TIMEBASE_NS / 10));
}
// Check if can send (load time < now)
if (link->last_activity < now_tb) {
if (link->last_activity < min_load_time) {
min_load_time = link->last_activity;
best = link;
}
}
link = link->next;
}
return best;
}
// Init timeout callback (placeholder)
static void init_timeout_cb(void* arg) {
struct ETCP_LINK* link = arg;
// Resend INIT, increment retry
link->init_retry_count++;
if (link->init_retry_count > 5) {
// Fail
etcp_link_close(link);
return;
}
// Resend...
link->init_timeout *= 2; // Backoff
link->init_timer = uasync_set_timeout(link->etcp->instance->ua, link->init_timeout, link, init_timeout_cb);
}
// Bandwidth limit update (called after send)
void etcp_loadbalancer_update_after_send(struct ETCP_LINK* link, size_t pkt_size) {
if (!link || link->bandwidth == 0) return;
// Time to transmit (ns)
double byte_time_ns = 1000000000.0 / (link->bandwidth * 8.0); // bits/sec to byte/ns
uint64_t tx_time_ns = (uint64_t)(pkt_size * byte_time_ns);
// To timebase (0.1ms units)
uint64_t tx_time_tb = tx_time_ns / (TIMEBASE_NS / 10);
// Update last_activity
uint64_t now_tb = get_current_nanotime() / (TIMEBASE_NS / 10);
link->last_activity += tx_time_tb;
if (link->last_activity < now_tb - (DELTA_TIME_NS / (TIMEBASE_NS / 10))) {
link->last_activity = now_tb - (DELTA_TIME_NS / (TIMEBASE_NS / 10));
}
}
src/etcp_loadbalancer.h
Executable
+20
View File
@@ -0,0 +1,20 @@
// etcp_loadbalancer.h - Load Balancer for ETCP Channels
#ifndef ETCP_LOADBALANCER_H
#define ETCP_LOADBALANCER_H
#include "etcp.h"
#ifdef __cplusplus
extern "C" {
#endif
// Functions
struct ETCP_LINK* etcp_loadbalancer_select_link(struct ETCP_CONN* etcp);
// Add more as needed (e.g., update bandwidth)
#ifdef __cplusplus
}
#endif
#endif // ETCP_LOADBALANCER_H
src/etcp_protocol.txt
-63
View File
@@ -1,63 +0,0 @@
Формат кодограммы:
------------------
Каждая кодограмма состоит из обязательного заголовка и опциональных секций:
1. Обязательный заголовок всего пакета (2 байта) добавляется при передаче, есть во всех пакетах:
[Timestamp high][Timestamp low]
- Timestamp: время отправки в единицах 0.1 мс (циклическое). при переповторах время обновляется
штфруется строго ВСЁ включая ВСЕ заголовки (кроме INIT+publickey). timestamp вставляется ВСЕГДА ВО ВСЕ КОДОГРАММЫ
2. Опциональные секции (одна или несколько) добавляются в etcp.c:
а) Подтверждения (ACK) - заголовок 0x01:
[0x01][count][(id_hi,id_lo,ts_hi,ts_lo)×count][last_delivered_hi,lo][last_rx_hi,lo]
- count: количество пар ID+timestamp (1-32)
- last_delivered_id: последний ID, доставленный получателю
- last_rx_id: последний полученный ID (для синхронизации прогресса)
б) Запросы ретрансмиссии - заголовок 0x10-0x2F:
[0x10+(count-1)][(id_hi,id_lo)×count][last_delivered_hi,lo][last_rx_hi,lo]
- count: (заголовок & 0x0F) + 1 (1-32)
- last_delivered_id, last_rx_id: для синхронизации состояния
в) channel timestamp (добавляется после выбора канала передачи):
[0x0F] [RET_Timestamp high][RET_Timestamp low] [RECV_Timestamp high][RECV_Timestamp low]
- RET_Timestamp: это timestamp последнего принятого пакета по этому каналу ETCP_LINK плюс разница времени между принятием этого пакета и текущим временем. т.е. приёмная сторона по этому timestamp (и зная своё время) может просчитать время в пути туда + обратно
- RECV_Timestamp: это timestamp времени приёма (т.е. отправляем время "когда мы получили этот пакет по локальном урмени") - по нему другая сторона сможет просчитать относительное время задержки в одну сторону (время туда без обратно).
если последний пакет по этому каналу принят сильно давно (прошло более 30000 единиц времени) то channel timestamp не добавляем.
3. Полезная нагрузка - заголовок 0x00 (одна секция и всегда последняя):
[0x00] [ID high][ID low] [данные...] - Данные пакета
- ID: 16-битный циклический номер пакета.
Пакет может содержать несколько опциональных секций (например, ACK + данные).
Установка подключения для канала (реализщуется в etcp_connections):
когда etcp пытается отправить пакет через линк, то если в линке не инициализировано подключение и он клиент - то он отбрасывает этот пакет и запускает процесс установки соединения.
также процесс установки соединения инициируется при добавлении канала (в etcp_link_new) если это client.
процесс установки соединения:
- отправляем init запрос и выставляем таймаут (сохраняем его в struct ETCP_LINK)
- по таймауту повторяем init запросы, ведем счетчик запросов init.
- когда получаем init подтверждение (отправляется в etcp_connections_read_callback) снимаем таймаут и выставляем флаг struct ETCP_LINK initialized=1
Кодограммы с этими секциями обрабатываются в etcp_connections (в этих кодограммах всегда только одна секция). в обязательном заголовке ID не используется, при передаче для порядка =0:
г) Init запрос - заголовок 0x02 (со сбросом etcp сессии) или 0x04 (бес сброса):
[0x02/0x04] [my_node_id 64bit] [my mtu high] [my mty low] [keepalive high] [keepalive low] [my publick key (64 байта, не шифруется)]
- Инициирует новый connection для tcp instance. если tcp instance нет (первое подключение) - создаёт. Между нодами только одно подключение, но можно добавлять каналы.
- Публичный ключ отправляется в конце пакета без шифрования, чтобы получатель мог установить его и расшифровать остальную часть пакета
д) Init подтверждение - заголовок 0x03:
[0x03] [my_node_id 64bit] [my mtu high] [my mty low]
- Подтверждение инициализации
При получении init получатель пакета должен:
- reset ETCP_LINK с этим ip_port если он есть
- создать новый ETCP_CONN с этим node_id. если уже существует подключение с этим node_id - вызвать etcp_reset (функция сброса окон неподтвержденных данных и нумерации)
uasync select -> etcp_connection.c etcp_connections_read_callback: memory_pool_alloc, decrypt (or init) -> etcp_conn_input (сборка, дефрагментация в ETCP_CONN output_queue)
ETCP_CONN output_queue ->
src/routing.c
+6 -6
View File
@@ -113,8 +113,8 @@ bool routing_table_insert(struct routing_table *table, const struct route_entry
if (!routing_validate_route(table, entry->network, entry->prefix_length, entry->type)) {
char ip_str[16];
ip_to_string(entry->network, ip_str);
printf("[ROUTING] Ignoring invalid route: %s/%d (type: %s)\n",
ip_str, entry->prefix_length, route_type_to_string(entry->type));
DEBUG_WARN(DEBUG_CATEGORY_ROUTING, "Ignoring invalid route: %s/%d (type: %s)",
ip_str, entry->prefix_length, route_type_to_string(entry->type));
return false;
}
@@ -179,9 +179,9 @@ bool routing_table_lookup(struct routing_table *table, uint32_t dest_ip, struct
char ip_str[16];
ip_to_string(dest_ip, ip_str);
printf("[ROUTING] Found route for %s: %s/%d -> %s\n",
ip_str, ip_to_string(entry->network, ip_str), entry->prefix_length,
ip_to_string(entry->next_hop_ip, ip_str));
DEBUG_INFO(DEBUG_CATEGORY_ROUTING, "Found route for %s: %s/%d -> %s",
ip_str, ip_to_string(entry->network, ip_str), entry->prefix_length,
ip_to_string(entry->next_hop_ip, ip_str));
table->stats.hit_count++;
table->stats.routes_lookup_hits++;
@@ -259,7 +259,7 @@ bool enhanced_routing_add_subnet_range(struct routing_table *table, uint32_t net
char ip_str[16];
ip_to_string(network, ip_str);
printf("[ROUTING] Added subnet validation range: %s/%d\n", ip_str, prefix_length);
DEBUG_INFO(DEBUG_CATEGORY_ROUTING, "Added subnet validation range: %s/%d", ip_str, prefix_length);
return true;
}
src/tun_if.c
+2 -2
View File
@@ -266,7 +266,7 @@ static uint32_t get_dest_ip(const uint8_t *packet, size_t len) {
// Callback for TUN device read events
static void tun_read_callback(int fd, void* user_arg) {
void tun_read_callback(int fd, void* user_arg) {
struct UTUN_INSTANCE *instance = (struct UTUN_INSTANCE*)user_arg;
uint8_t buffer[MAX_PACKET_SIZE];
@@ -333,7 +333,7 @@ void utun_instance_unregister_sockets(struct UTUN_INSTANCE *instance) {
if (instance->tun_socket_id) {
uasync_remove_socket(instance->ua, instance->tun_socket_id);
instance->tun_socket_id = NULL;
DEBUG_INFO(DEBUG_CATEGORY_TUN, "Unregistered TUN socket");
DEBUG_INFO(DEBUG_CATEGORY_TUN, "Unregistered TUN socket: %s", instance->tun.ifname);
}
}
src/tun_if.h
+3
View File
@@ -96,6 +96,9 @@ int tun_get_config(const char *ifname, struct tun_config *config);
int utun_instance_register_sockets(struct UTUN_INSTANCE *instance);
void utun_instance_unregister_sockets(struct UTUN_INSTANCE *instance);
// TUN callback function
void tun_read_callback(int fd, void* user_arg);
#ifdef __cplusplus
}
src/utun.c
+22 -17
View File
@@ -44,8 +44,7 @@ typedef struct {
char *config_file;
char *pid_file;
char *log_file;
char *tun_ifname;
char *tun_ip;
char *debug_config;
int foreground;
int help;
} cmd_args_t;
@@ -88,6 +87,8 @@ static void parse_args(int argc, char *argv[], cmd_args_t *args) {
memset(args, 0, sizeof(*args));
args->config_file = DEFAULT_CONFIG;
args->pid_file = DEFAULT_PIDFILE;
args->log_file = NULL;
args->debug_config = NULL;
args->foreground = 0;
args->help = 0;
@@ -95,8 +96,7 @@ static void parse_args(int argc, char *argv[], cmd_args_t *args) {
{"config", required_argument, 0, 'c'},
{"pidfile", required_argument, 0, 'p'},
{"log", required_argument, 0, 'l'},
{"tun", required_argument, 0, 't'},
{"tun-ip", required_argument, 0, 'i'},
{"debug", required_argument, 0, 'd'},
{"foreground", no_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
@@ -105,7 +105,7 @@ static void parse_args(int argc, char *argv[], cmd_args_t *args) {
int opt;
int option_index = 0;
while ((opt = getopt_long(argc, argv, "c:p:l:t:i:fh",
while ((opt = getopt_long(argc, argv, "c:p:l:d:fh",
long_options, &option_index)) != -1) {
switch (opt) {
case 'c':
@@ -117,15 +117,12 @@ static void parse_args(int argc, char *argv[], cmd_args_t *args) {
case 'l':
args->log_file = optarg;
break;
case 't':
args->tun_ifname = optarg;
break;
case 'i':
args->tun_ip = optarg;
break;
case 'f':
args->foreground = 1;
break;
case 'd':
args->debug_config = optarg;
break;
case 'h':
args->help = 1;
break;
@@ -144,12 +141,11 @@ static void print_usage(const char *progname) {
printf(" -c, --config FILE Configuration file (default: %s)\n", DEFAULT_CONFIG);
printf(" -p, --pidfile FILE PID file (default: %s)\n", DEFAULT_PIDFILE);
printf(" -l, --log FILE Log file (default: stderr)\n");
printf(" -t, --tun IFNAME TUN interface name (e.g., tun12)\n");
printf(" -i, --tun-ip ADDR TUN interface IP address (e.g., 10.0.0.1/24)\n");
printf(" -d, --debug CONFIG Debug configuration (e.g., \"etcp:debug,routing:info\")\n");
printf(" -f, --foreground Run in foreground (don't daemonize)\n");
printf(" -h, --help Show this help\n");
printf("\nExamples:\n");
printf(" %s -c myconfig.conf -t tun0 -i 10.0.0.1/24\n", progname);
printf(" %s -c myconfig.conf\n", progname);
printf(" %s --config server.conf --pidfile /var/run/utun.pid\n", progname);
}
@@ -248,6 +244,15 @@ int main(int argc, char *argv[]) {
print_usage(argv[0]);
return 0;
}
// Initialize global debug system early if configured from command line
if (args.debug_config) {
debug_config_init();
if (debug_parse_config(args.debug_config) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "Invalid debug configuration: %s", args.debug_config);
return 1;
}
}
// Create uasync instance
struct UASYNC* ua = uasync_create();
@@ -260,7 +265,7 @@ int main(int argc, char *argv[]) {
// Create and initialize instance
struct UTUN_INSTANCE *instance = utun_instance_create(ua, args.config_file, args.log_file);
if (!instance) {
fprintf(stderr, "Failed to create UTUN instance\n");
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Failed to create UTUN instance");
return 1;
}
@@ -271,14 +276,14 @@ int main(int argc, char *argv[]) {
// Initialize all components (TUN, routing, connections)
if (utun_instance_init(instance) < 0) {
fprintf(stderr, "Failed to initialize instance\n");
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Failed to initialize instance");
utun_instance_destroy(instance);
return 1;
}
// Register sockets with uasync
if (utun_instance_register_sockets(instance) < 0) {
fprintf(stderr, "Failed to register sockets\n");
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Failed to register sockets");
utun_instance_destroy(instance);
return 1;
}
src/utun_instance.c
+67 -22
View File
@@ -15,10 +15,13 @@
#include <unistd.h>
#include <arpa/inet.h>
// Forward declarations
static void tun_read_callback(int fd, void* user_arg);
static uint32_t get_dest_ip(const uint8_t *packet, size_t len);
// Global instance for signal handlers
static struct UTUN_INSTANCE *g_instance = NULL;
@@ -32,6 +35,10 @@ struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config
instance->log_fp = NULL;
instance->ua = ua;
// Note: Global debug system is initialized from command line arguments if provided
// If not initialized via command line, instance-specific logging can be set up here
// The first initialization wins - either global (from main) or instance-specific
// Ensure keys and node_id exist in config
if (config_ensure_keys_and_node_id(config_file) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "Failed to ensure keys and node_id in config: %s", config_file);
@@ -47,8 +54,8 @@ struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config
return NULL;
}
// Open log file
if (log_file) {
// Open log file only if not using global debug system output
if (log_file && !g_debug_config.output_file) {
instance->log_fp = fopen(log_file, "a");
if (!instance->log_fp) {
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "Failed to open log file %s: %s", log_file, strerror(errno));
@@ -64,41 +71,67 @@ struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config
instance->pkt_pool=memory_pool_init(PACKET_DATA_SIZE+100);
/*
// Initialize TUN device
if (tun_create(&instance->tun) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to create TUN device");
return -1;
free(instance);
return NULL;
}
// Configure TUN device
if (tun_set_ip(instance->tun.ifname, instance->config->global.tun_ip) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN IP");
// Configure TUN device IP (BSD: use config IP as-is, Linux/Win: IP/32)
char tun_ip_str[64];
char ip_buffer[64];
// Convert struct IP to string using inet_ntop
if (instance->config->global.tun_ip.family == AF_INET) {
inet_ntop(AF_INET, &instance->config->global.tun_ip.addr.v4, ip_buffer, sizeof(ip_buffer));
} else {
inet_ntop(AF_INET6, &instance->config->global.tun_ip.addr.v6, ip_buffer, sizeof(ip_buffer));
}
#ifdef __linux__
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer);
#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
// BSD systems: use config IP as-is, peer IP will be 192.0.2.1
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s", ip_buffer);
#else
snprintf(tun_ip_str, sizeof(tun_ip_str), "%s/32", ip_buffer); // Default to /32
#endif
if (tun_set_ip(instance->tun.ifname, tun_ip_str) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN IP: %s", tun_ip_str);
tun_close(&instance->tun);
return -1;
free(instance);
return NULL;
}
if (instance->config->global.mtu > 0) {
if (tun_set_mtu(instance->tun.ifname, instance->config->global.mtu) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN MTU");
tun_close(&instance->tun);
return -1;
}
// Set MTU (default 1500)
int mtu = instance->config->global.mtu > 0 ? instance->config->global.mtu : 1500;
if (tun_set_mtu(instance->tun.ifname, mtu) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to set TUN MTU: %d", mtu);
tun_close(&instance->tun);
free(instance);
return NULL;
}
if (tun_set_up(instance->tun.ifname) < 0) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to bring up TUN interface");
tun_close(&instance->tun);
return -1;
free(instance);
return NULL;
}
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN interface initialized: %s with IP %s",
instance->tun.ifname, tun_ip_str);
// Create routing table
instance->routing_table = routing_table_create();
if (!instance->routing_table) {
DEBUG_ERROR(DEBUG_CATEGORY_ROUTING, "Failed to create routing table");
return -1;
}
*/
tun_close(&instance->tun);
free(instance);
return NULL;
}
// Initialize connections from configuration - moved to utun_instance_init
// to avoid double initialization
/*
@@ -116,7 +149,7 @@ struct UTUN_INSTANCE* utun_instance_create(struct UASYNC* ua, const char *config
void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
if (!instance) return;
printf("[INSTANCE_DESTROY] Starting cleanup for instance %p\n", instance);
DEBUG_INFO(DEBUG_CATEGORY_MEMORY, "[INSTANCE_DESTROY] Starting cleanup for instance %p", instance);
// Диагностика ресурсов ДО cleanup
utun_instance_diagnose_leaks(instance, "BEFORE_CLEANUP");
@@ -161,7 +194,7 @@ void utun_instance_destroy(struct UTUN_INSTANCE *instance) {
// Cleanup TUN
if (instance->tun.fd >= 0) {
DEBUG_INFO(DEBUG_CATEGORY_MEMORY, "[INSTANCE_DESTROY] Closing TUN interface");
DEBUG_INFO(DEBUG_CATEGORY_TUN, "Closing TUN interface: %s", instance->tun.ifname);
tun_close(&instance->tun);
}
@@ -220,6 +253,18 @@ void utun_instance_stop(struct UTUN_INSTANCE *instance) {
int utun_instance_init(struct UTUN_INSTANCE *instance) {
if (!instance) return -1;
// Register TUN socket with uasync
if (instance->tun.fd >= 0) {
instance->tun_socket_id = uasync_add_socket(instance->ua, instance->tun.fd,
tun_read_callback, NULL, NULL, instance);
if (!instance->tun_socket_id) {
DEBUG_ERROR(DEBUG_CATEGORY_TUN, "Failed to register TUN socket with uasync");
return -1;
}
DEBUG_INFO(DEBUG_CATEGORY_TUN, "TUN interface registered: %s (fd=%d)",
instance->tun.ifname, instance->tun.fd);
}
// Initialize connections
if (init_connections(instance) < 0) {
return -1;
@@ -231,7 +276,7 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
// Диагностическая функция для анализа утечек
void utun_instance_diagnose_leaks(struct UTUN_INSTANCE *instance, const char *phase) {
if (!instance) {
printf("[DIAGNOSE] NULL instance for phase: %s\n", phase);
DEBUG_ERROR(DEBUG_CATEGORY_MEMORY, "[DIAGNOSE] NULL instance for phase: %s", phase);
return;
}