stream-ws: Inherit stream-tcp
This eliminates the need for implementing all stream functionsrsa-aes
Andri Yngvason
parent
0199d87368
commit
83ed3273ce
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@ -0,0 +1,36 @@
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/*
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* Copyright (c) 2023 Andri Yngvason
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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#include "stream.h"
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#include <unistd.h>
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struct stream;
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int stream_tcp_init(struct stream* self, int fd, stream_event_fn on_event,
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void* userdata);
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int stream_tcp_close(struct stream* self);
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void stream_tcp_destroy(struct stream* self);
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ssize_t stream_tcp_read(struct stream* self, void* dst, size_t size);
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int stream_tcp_send(struct stream* self, struct rcbuf* payload,
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stream_req_fn on_done, void* userdata);
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int stream_tcp_send_first(struct stream* self, struct rcbuf* payload);
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void stream_tcp_exec_and_send(struct stream* self,
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stream_exec_fn exec_fn, void* userdata);
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int stream_tcp_install_cipher(struct stream* self,
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struct crypto_cipher* cipher);
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@ -30,6 +30,7 @@
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#include "rcbuf.h"
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#include "stream.h"
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#include "stream-common.h"
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#include "stream-tcp.h"
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#include "sys/queue.h"
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#include "crypto.h"
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#include "neatvnc.h"
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@ -47,7 +48,7 @@ static struct rcbuf* encrypt_rcbuf(struct stream* self, struct rcbuf* payload)
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return result;
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}
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static int stream_tcp_close(struct stream* self)
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int stream_tcp_close(struct stream* self)
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{
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if (self->state == STREAM_STATE_CLOSED)
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return -1;
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@ -67,7 +68,7 @@ static int stream_tcp_close(struct stream* self)
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return 0;
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}
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static void stream_tcp_destroy(struct stream* self)
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void stream_tcp_destroy(struct stream* self)
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{
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vec_destroy(&self->tmp_buf);
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crypto_cipher_del(self->cipher);
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@ -198,7 +199,7 @@ static void stream_tcp__on_event(void* obj)
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stream_tcp__on_writable(self);
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}
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static ssize_t stream_tcp_read(struct stream* self, void* dst, size_t size)
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ssize_t stream_tcp_read(struct stream* self, void* dst, size_t size)
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{
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if (self->state != STREAM_STATE_NORMAL)
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return -1;
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@ -232,7 +233,7 @@ static ssize_t stream_tcp_read(struct stream* self, void* dst, size_t size)
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return rc;
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}
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static int stream_tcp_send(struct stream* self, struct rcbuf* payload,
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int stream_tcp_send(struct stream* self, struct rcbuf* payload,
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stream_req_fn on_done, void* userdata)
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{
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if (self->state == STREAM_STATE_CLOSED)
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@ -251,7 +252,7 @@ static int stream_tcp_send(struct stream* self, struct rcbuf* payload,
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return stream_tcp__flush(self);
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}
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static int stream_tcp_send_first(struct stream* self, struct rcbuf* payload)
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int stream_tcp_send_first(struct stream* self, struct rcbuf* payload)
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{
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if (self->state == STREAM_STATE_CLOSED)
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return -1;
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@ -266,7 +267,7 @@ static int stream_tcp_send_first(struct stream* self, struct rcbuf* payload)
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return stream_tcp__flush(self);
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}
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static void stream_tcp_exec_and_send(struct stream* self,
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void stream_tcp_exec_and_send(struct stream* self,
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stream_exec_fn exec_fn, void* userdata)
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{
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if (self->state == STREAM_STATE_CLOSED)
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@ -284,7 +285,7 @@ static void stream_tcp_exec_and_send(struct stream* self,
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stream_tcp__flush(self);
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}
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static int stream_tcp_install_cipher(struct stream* self,
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int stream_tcp_install_cipher(struct stream* self,
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struct crypto_cipher* cipher)
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{
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assert(!self->cipher);
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@ -302,12 +303,9 @@ static struct stream_impl impl = {
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.install_cipher = stream_tcp_install_cipher,
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};
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struct stream* stream_new(int fd, stream_event_fn on_event, void* userdata)
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int stream_tcp_init(struct stream* self, int fd, stream_event_fn on_event,
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void* userdata)
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{
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struct stream* self = calloc(1, STREAM_ALLOC_SIZE);
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if (!self)
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return NULL;
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self->impl = &impl,
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self->fd = fd;
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self->on_event = on_event;
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@ -319,19 +317,31 @@ struct stream* stream_new(int fd, stream_event_fn on_event, void* userdata)
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self->handler = aml_handler_new(fd, stream_tcp__on_event, self, NULL);
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if (!self->handler)
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goto failure;
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return -1;
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if (aml_start(aml_get_default(), self->handler) < 0)
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goto start_failure;
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stream__poll_r(self);
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return self;
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return 0;
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start_failure:
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aml_unref(self->handler);
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self = NULL; /* Handled in unref */
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failure:
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free(self);
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return NULL;
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return -1;
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}
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struct stream* stream_new(int fd, stream_event_fn on_event, void* userdata)
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{
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struct stream* self = calloc(1, STREAM_ALLOC_SIZE);
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if (!self)
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return NULL;
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if (!stream_tcp_init(self, fd, on_event, userdata)) {
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free(self);
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return NULL;
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}
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return self;
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}
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@ -16,6 +16,7 @@
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#include "stream.h"
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#include "stream-common.h"
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#include "stream-tcp.h"
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#include "websocket.h"
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#include "vec.h"
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#include "neatvnc.h"
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@ -38,31 +39,17 @@ struct stream_ws_exec_ctx {
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struct stream_ws {
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struct stream base;
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stream_event_fn on_event;
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enum stream_ws_state ws_state;
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struct ws_frame_header header;
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enum ws_opcode current_opcode;
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uint8_t read_buffer[4096]; // TODO: Is this a reasonable size?
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size_t read_index;
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struct stream* tcp_stream;
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uint8_t read_buffer[4096]; // TODO: Is this a reasonable size?
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};
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static int stream_ws_close(struct stream* self)
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{
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struct stream_ws* ws = (struct stream_ws*)self;
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self->state = STREAM_STATE_CLOSED;
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return stream_close(ws->tcp_stream);
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}
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static void stream_ws_destroy(struct stream* self)
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{
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struct stream_ws* ws = (struct stream_ws*)self;
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stream_destroy(ws->tcp_stream);
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free(self);
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}
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static void stream_ws_read_into_buffer(struct stream_ws* ws)
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{
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ssize_t n_read = stream_read(ws->tcp_stream,
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ssize_t n_read = stream_tcp_read(&ws->base,
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ws->read_buffer + ws->read_index,
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sizeof(ws->read_buffer) - ws->read_index);
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if (n_read > 0)
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@ -104,14 +91,15 @@ static ssize_t stream_ws_process_ping(struct stream_ws* ws, size_t offset)
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uint8_t buf[WS_HEADER_MIN_SIZE];
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int reply_len = ws_write_frame_header(buf, &reply);
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stream_write(ws->tcp_stream, buf, reply_len, NULL, NULL);
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stream_tcp_send(&ws->base, rcbuf_from_mem(buf, reply_len),
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NULL, NULL);
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}
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int payload_len = MIN(ws->read_index, ws->header.payload_length);
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// Feed back the payload:
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stream_write(ws->tcp_stream, ws->read_buffer + offset,
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payload_len, NULL, NULL);
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stream_tcp_send(&ws->base, rcbuf_from_mem(ws->read_buffer + offset,
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payload_len), NULL, NULL);
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stream_ws_advance_read_buffer(ws, payload_len, offset);
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return 0;
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@ -124,7 +112,7 @@ static ssize_t stream_ws_process_payload(struct stream_ws* ws, void* dst,
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case WS_OPCODE_CONT:
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// Remote end started with a continuation frame. This is
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// unexpected, so we'll just close.
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stream__remote_closed(ws->tcp_stream);
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stream__remote_closed(&ws->base);
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return 0;
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case WS_OPCODE_TEXT:
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// This is unexpected, but let's just ignore it...
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@ -133,7 +121,7 @@ static ssize_t stream_ws_process_payload(struct stream_ws* ws, void* dst,
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case WS_OPCODE_BIN:
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return stream_ws_copy_payload(ws, dst, size, offset);
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case WS_OPCODE_CLOSE:
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stream__remote_closed(ws->tcp_stream);
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stream__remote_closed(&ws->base);
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return 0;
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case WS_OPCODE_PING:
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return stream_ws_process_ping(ws, offset);
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@ -213,8 +201,8 @@ static ssize_t stream_ws_read_handshake(struct stream_ws* ws, void* dst,
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if (header_len < 0)
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return 0;
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ws->tcp_stream->cork = false;
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stream_send_first(ws->tcp_stream, rcbuf_from_mem(reply, strlen(reply)));
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ws->base.cork = false;
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stream_tcp_send_first(&ws->base, rcbuf_from_mem(reply, strlen(reply)));
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ws->read_index -= header_len;
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memmove(ws->read_buffer, ws->read_buffer + header_len, ws->read_index);
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@ -255,15 +243,16 @@ static int stream_ws_send(struct stream* self, struct rcbuf* payload,
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uint8_t raw_head[WS_HEADER_MIN_SIZE];
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int head_len = ws_write_frame_header(raw_head, &head);
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stream_write(ws->tcp_stream, &raw_head, head_len, NULL, NULL);
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return stream_send(ws->tcp_stream, payload, on_done, userdata);
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stream_tcp_send(&ws->base, rcbuf_from_mem(&raw_head, head_len),
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NULL, NULL);
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return stream_tcp_send(&ws->base, payload, on_done, userdata);
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}
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static struct rcbuf* stream_ws_chained_exec(struct stream* tcp_stream,
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void* userdata)
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{
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struct stream_ws* ws = (struct stream_ws*)tcp_stream;
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struct stream_ws_exec_ctx* ctx = userdata;
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struct stream_ws* ws = tcp_stream->userdata;
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struct rcbuf* buf = ctx->exec(&ws->base, ctx->userdata);
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@ -293,23 +282,12 @@ static void stream_ws_exec_and_send(struct stream* self, stream_exec_fn exec,
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ctx->exec = exec;
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ctx->userdata = userdata;
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stream_exec_and_send(ws->tcp_stream, stream_ws_chained_exec, ctx);
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}
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static void stream_ws_event(struct stream* self, enum stream_event event)
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{
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struct stream_ws* ws = self->userdata;
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if (event == STREAM_EVENT_REMOTE_CLOSED) {
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ws->base.state = STREAM_STATE_CLOSED;
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}
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ws->base.on_event(&ws->base, event);
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stream_tcp_exec_and_send(&ws->base, stream_ws_chained_exec, ctx);
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}
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static struct stream_impl impl = {
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.close = stream_ws_close,
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.destroy = stream_ws_destroy,
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.close = stream_tcp_close,
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.destroy = stream_tcp_destroy,
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.read = stream_ws_read,
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.send = stream_ws_send,
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.exec_and_send = stream_ws_exec_and_send,
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@ -317,23 +295,15 @@ static struct stream_impl impl = {
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struct stream* stream_ws_new(int fd, stream_event_fn on_event, void* userdata)
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{
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struct stream_ws *self = calloc(1, sizeof(*self));
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struct stream_ws *self = calloc(1, STREAM_ALLOC_SIZE);
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if (!self)
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return NULL;
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self->base.state = STREAM_STATE_NORMAL;
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self->base.impl = &impl;
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self->base.on_event = on_event;
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self->base.userdata = userdata;
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self->tcp_stream = stream_new(fd, stream_ws_event, self);
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if (!self->tcp_stream) {
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free(self);
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return NULL;
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}
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stream_tcp_init(&self->base, fd, on_event, userdata);
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self->base.impl = &impl;
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// Don't send anything until handshake is done:
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self->tcp_stream->cork = true;
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self->base.cork = true;
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return &self->base;
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}
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