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-rw-r--r--src/Makefile2
-rw-r--r--src/fastd.c43
-rw-r--r--src/fastd.h7
-rw-r--r--src/handshake.c33
-rw-r--r--src/handshake.h4
-rw-r--r--src/method_null.c16
-rw-r--r--src/task.c9
-rw-r--r--src/task.h9
8 files changed, 98 insertions, 25 deletions
diff --git a/src/Makefile b/src/Makefile
index a10ef63..e36757e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -10,4 +10,4 @@ task.o : task.c task.h queue.h
queue.o : queue.c queue.h
clean :
- rm -f fastd fastd.o method_null.o task.o
+ rm -f fastd fastd.o handshake.o method_null.o task.o queue.o
diff --git a/src/fastd.c b/src/fastd.c
index b5036b4..9798496 100644
--- a/src/fastd.c
+++ b/src/fastd.c
@@ -97,10 +97,12 @@ static void configure(fastd_context *ctx, fastd_config *conf) {
conf->peers->port = htons(1337);
ctx->peers = NULL;
- fastd_peer **current_peer = &ctx->peers;
+}
+static void init_peers(fastd_context *ctx) {
+ fastd_peer **current_peer = &ctx->peers;
fastd_peer_config *peer_conf;
- for (peer_conf = conf->peers; peer_conf; peer_conf = peer_conf->next) {
+ for (peer_conf = ctx->conf->peers; peer_conf; peer_conf = peer_conf->next) {
*current_peer = malloc(sizeof(fastd_peer));
(*current_peer)->next = NULL;
(*current_peer)->config = peer_conf;
@@ -110,6 +112,8 @@ static void configure(fastd_context *ctx, fastd_config *conf) {
(*current_peer)->last_req_id = 0;
(*current_peer)->addresses = NULL;
+ fastd_task_schedule_handshake(ctx, *current_peer, 0);
+
current_peer = &(*current_peer)->next;
}
}
@@ -173,6 +177,16 @@ static void handle_tasks(fastd_context *ctx) {
fastd_buffer_free(task->handle_recv.buffer);
break;
+ case TASK_HANDSHAKE:
+ if (task->handshake.peer->state != STATE_WAIT)
+ break;
+
+ pr_debug(ctx, "Sending handshake...");
+ fastd_handshake_send(ctx, task->handshake.peer);
+
+ fastd_task_schedule_handshake(ctx, task->handshake.peer, 20000);
+ break;
+
default:
exit_bug(ctx, "invalid task type");
}
@@ -208,9 +222,15 @@ static void handle_input(fastd_context *ctx) {
dest_addr[0], dest_addr[1], dest_addr[2], dest_addr[3], dest_addr[4], dest_addr[5]);
// TODO find correct peer
+ fastd_peer *peer = ctx->peers;
- buffer.len = len;
- ctx->conf->method->method_send(ctx, ctx->peers, buffer);
+ if (peer->state == STATE_ESTABLISHED) {
+ buffer.len = len;
+ ctx->conf->method->method_send(ctx, peer, buffer);
+ }
+ else {
+ fastd_buffer_free(buffer);
+ }
}
if (fds[1].revents & POLLIN) {
size_t max_len = ctx->conf->method->method_max_packet_size(ctx);
@@ -236,17 +256,22 @@ static void handle_input(fastd_context *ctx) {
if (len < 0)
pr_warn(ctx, "recvfrom: %s", strerror(errno));
- // TODO get peer
+ // TODO get correct peer
+ fastd_peer *peer = ctx->peers;
+
switch (packet_type) {
case 0:
buffer.len = len - 1;
- ctx->conf->method->method_handle_recv(ctx, NULL, buffer);
+ ctx->conf->method->method_handle_recv(ctx, peer, buffer);
break;
- default:
- fastd_handshake_handle(ctx, NULL, packet_type, buffer);
+ case 1:
+ fastd_handshake_handle(ctx, peer, buffer);
break;
+
+ default:
+ fastd_buffer_free(buffer);
}
}
}
@@ -260,6 +285,8 @@ int main() {
configure(&ctx, &conf);
ctx.conf = &conf;
+ init_peers(&ctx);
+
init_tuntap(&ctx);
init_socket(&ctx);
diff --git a/src/fastd.h b/src/fastd.h
index db0190d..2d372a2 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -70,7 +70,6 @@ typedef struct _fastd_peer_config {
typedef enum _fastd_peer_state {
STATE_WAIT,
- STATE_HANDSHAKE_SENT,
STATE_ESTABLISHED,
} fastd_peer_state;
@@ -95,10 +94,10 @@ typedef struct _fastd_method {
size_t (*method_max_packet_size)(fastd_context *ctx);
- void (*method_init)(fastd_context *ctx, const fastd_peer *peer);
+ void (*method_init)(fastd_context *ctx, fastd_peer *peer);
- void (*method_handle_recv)(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer);
- void (*method_send)(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer);
+ void (*method_handle_recv)(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer);
+ void (*method_send)(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer);
} fastd_method;
typedef struct _fastd_config {
diff --git a/src/handshake.c b/src/handshake.c
index 5f4645d..350dc5e 100644
--- a/src/handshake.c
+++ b/src/handshake.c
@@ -32,7 +32,7 @@
#include <string.h>
-void fastd_handshake_send(fastd_context *ctx, const fastd_peer *peer) {
+void fastd_handshake_send(fastd_context *ctx, fastd_peer *peer) {
size_t method_len = strlen(ctx->conf->method->name);
size_t len = sizeof(fastd_packet_request)+method_len;
fastd_buffer buffer = fastd_buffer_alloc(len, 0);
@@ -40,7 +40,7 @@ void fastd_handshake_send(fastd_context *ctx, const fastd_peer *peer) {
request->reply = 0;
request->cp = 0;
- request->req_id = 0;
+ request->req_id = ++peer->last_req_id;
request->rsv = 0;
request->flags = 0;
request->proto = ctx->conf->protocol;
@@ -50,10 +50,7 @@ void fastd_handshake_send(fastd_context *ctx, const fastd_peer *peer) {
fastd_task_put_send_handshake(ctx, peer, buffer);
}
-void fastd_handshake_handle(fastd_context *ctx, const fastd_peer *peer, uint8_t packet_type, fastd_buffer buffer) {
- if (packet_type != 1)
- goto end_free; // TODO
-
+void fastd_handshake_handle(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer) {
if (buffer.len < sizeof(fastd_packet_any))
goto end_free;
@@ -87,6 +84,30 @@ void fastd_handshake_handle(fastd_context *ctx, const fastd_peer *peer, uint8_t
fastd_task_put_send_handshake(ctx, peer, reply_buffer);
}
+ else if (packet->any.reply) {
+ if (buffer.len < sizeof(fastd_packet_reply))
+ goto end_free;
+
+ if (!packet->reply.cp) {
+ if (packet->reply.req_id != peer->last_req_id)
+ goto end_free;
+ }
+ else {
+ goto end_free; // TODO
+ }
+
+ switch (packet->reply.reply_code) {
+ case REPLY_SUCCESS:
+ pr_info(ctx, "Handshake successful.");
+ pr_info(ctx, "Connection established.");
+ peer->state = STATE_ESTABLISHED;
+ ctx->conf->method->method_init(ctx, peer);
+ break;
+
+ default:
+ pr_warn(ctx, "Handshake failed with code %i.", packet->reply.reply_code);
+ }
+ }
end_free:
fastd_buffer_free(buffer);
diff --git a/src/handshake.h b/src/handshake.h
index 503d558..3457a0e 100644
--- a/src/handshake.h
+++ b/src/handshake.h
@@ -30,7 +30,7 @@
#include "fastd.h"
-void fastd_handshake_send(fastd_context *ctx, const fastd_peer *peer);
-void fastd_handshake_handle(fastd_context *ctx, const fastd_peer *peer, uint8_t packet_type, fastd_buffer buffer);
+void fastd_handshake_send(fastd_context *ctx, fastd_peer *peer);
+void fastd_handshake_handle(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer);
#endif /* _FASTD_HANDSHAKE_H_ */
diff --git a/src/method_null.c b/src/method_null.c
index 34d1cce..75e74de 100644
--- a/src/method_null.c
+++ b/src/method_null.c
@@ -32,16 +32,24 @@ static size_t null_max_packet_size(fastd_context *ctx) {
return fastd_max_packet_size(ctx);
}
-static void null_init(fastd_context *ctx, const fastd_peer *peer) {
+static void null_init(fastd_context *ctx, fastd_peer *peer) {
fastd_buffer buffer = { .base = NULL, .len = 0, .free = NULL, .free_p = NULL };
fastd_task_put_send(ctx, peer, buffer);
}
-static void null_handle_recv(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer) {
- fastd_task_put_handle_recv(ctx, peer, buffer);
+static void null_handle_recv(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer) {
+ if (peer->state != STATE_ESTABLISHED) {
+ pr_info(ctx, "Connection established.");
+ peer->state = STATE_ESTABLISHED;
+ }
+
+ if (buffer.len)
+ fastd_task_put_handle_recv(ctx, peer, buffer);
+ else
+ fastd_buffer_free(buffer);
}
-static void null_send(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer) {
+static void null_send(fastd_context *ctx, fastd_peer *peer, fastd_buffer buffer) {
fastd_task_put_send(ctx, peer, buffer);
}
diff --git a/src/task.c b/src/task.c
index 0367cb4..2de03b1 100644
--- a/src/task.c
+++ b/src/task.c
@@ -61,3 +61,12 @@ void fastd_task_put_handle_recv(fastd_context *ctx, const fastd_peer *peer, fast
fastd_queue_put(&ctx->task_queue, task, 0);
}
+
+void fastd_task_schedule_handshake(fastd_context *ctx, fastd_peer *peer, int timeout) {
+ fastd_task_handshake *task = malloc(sizeof(fastd_task_handshake));
+
+ task->type = TASK_HANDSHAKE;
+ task->peer = peer;
+
+ fastd_queue_put(&ctx->task_queue, task, timeout);
+}
diff --git a/src/task.h b/src/task.h
index 731510b..dcf9cc0 100644
--- a/src/task.h
+++ b/src/task.h
@@ -36,6 +36,7 @@
typedef enum _fastd_task_type {
TASK_SEND,
TASK_HANDLE_RECV,
+ TASK_HANDSHAKE,
} fastd_task_type;
typedef struct _fastd_task_send {
@@ -52,10 +53,16 @@ typedef struct _fastd_task_handle_recv {
fastd_buffer buffer;
} fastd_task_handle_recv;
+typedef struct _fastd_task_handshake {
+ fastd_task_type type;
+ fastd_peer *peer;
+} fastd_task_handshake;
+
typedef union _fastd_task {
fastd_task_type type;
fastd_task_send send;
fastd_task_handle_recv handle_recv;
+ fastd_task_handshake handshake;
} fastd_task;
@@ -69,4 +76,6 @@ void fastd_task_put_send_handshake(fastd_context *ctx, const fastd_peer *peer, f
void fastd_task_put_send(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer);
void fastd_task_put_handle_recv(fastd_context *ctx, const fastd_peer *peer, fastd_buffer buffer);
+void fastd_task_schedule_handshake(fastd_context *ctx, fastd_peer *peer, int timeout);
+
#endif /* _FASTD_TASK_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 19:42:46 +0100