diff options
Diffstat (limited to 'thirdparty/wslay/wslay_event.c')
| -rw-r--r-- | thirdparty/wslay/wslay_event.c | 1027 |
1 files changed, 1027 insertions, 0 deletions
diff --git a/thirdparty/wslay/wslay_event.c b/thirdparty/wslay/wslay_event.c new file mode 100644 index 0000000000..57415c51e0 --- /dev/null +++ b/thirdparty/wslay/wslay_event.c @@ -0,0 +1,1027 @@ +/* + * Wslay - The WebSocket Library + * + * Copyright (c) 2011, 2012 Tatsuhiro Tsujikawa + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#include "wslay_event.h" + +#include <string.h> +#include <assert.h> +#include <stdio.h> + +#include "wslay_queue.h" +#include "wslay_frame.h" +#include "wslay_net.h" +/* Start of utf8 dfa */ +/* Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de> + * See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details. + * + * Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de> + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#define UTF8_ACCEPT 0 +#define UTF8_REJECT 12 + +static const uint8_t utf8d[] = { + /* + * The first part of the table maps bytes to character classes that + * to reduce the size of the transition table and create bitmasks. + */ + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, + 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8, + + /* + * The second part is a transition table that maps a combination + * of a state of the automaton and a character class to a state. + */ + 0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12, + 12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12, + 12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12, + 12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12, + 12,36,12,12,12,12,12,12,12,12,12,12, +}; + +static uint32_t +decode(uint32_t* state, uint32_t* codep, uint32_t byte) { + uint32_t type = utf8d[byte]; + + *codep = (*state != UTF8_ACCEPT) ? + (byte & 0x3fu) | (*codep << 6) : + (0xff >> type) & (byte); + + *state = utf8d[256 + *state + type]; + return *state; +} + +/* End of utf8 dfa */ + +static ssize_t wslay_event_frame_recv_callback(uint8_t *buf, size_t len, + int flags, void *user_data) +{ + struct wslay_event_frame_user_data *e = + (struct wslay_event_frame_user_data*)user_data; + return e->ctx->callbacks.recv_callback(e->ctx, buf, len, flags, e->user_data); +} + +static ssize_t wslay_event_frame_send_callback(const uint8_t *data, size_t len, + int flags, void *user_data) +{ + struct wslay_event_frame_user_data *e = + (struct wslay_event_frame_user_data*)user_data; + return e->ctx->callbacks.send_callback(e->ctx, data, len, flags, + e->user_data); +} + +static int wslay_event_frame_genmask_callback(uint8_t *buf, size_t len, + void *user_data) +{ + struct wslay_event_frame_user_data *e = + (struct wslay_event_frame_user_data*)user_data; + return e->ctx->callbacks.genmask_callback(e->ctx, buf, len, e->user_data); +} + +static int wslay_event_byte_chunk_init +(struct wslay_event_byte_chunk **chunk, size_t len) +{ + *chunk = (struct wslay_event_byte_chunk*)malloc + (sizeof(struct wslay_event_byte_chunk)); + if(*chunk == NULL) { + return WSLAY_ERR_NOMEM; + } + memset(*chunk, 0, sizeof(struct wslay_event_byte_chunk)); + if(len) { + (*chunk)->data = (uint8_t*)malloc(len); + if((*chunk)->data == NULL) { + free(*chunk); + return WSLAY_ERR_NOMEM; + } + (*chunk)->data_length = len; + } + return 0; +} + +static void wslay_event_byte_chunk_free(struct wslay_event_byte_chunk *c) +{ + if(!c) { + return; + } + free(c->data); + free(c); +} + +static void wslay_event_byte_chunk_copy(struct wslay_event_byte_chunk *c, + size_t off, + const uint8_t *data, size_t data_length) +{ + memcpy(c->data+off, data, data_length); +} + +static void wslay_event_imsg_set(struct wslay_event_imsg *m, + uint8_t fin, uint8_t rsv, uint8_t opcode) +{ + m->fin = fin; + m->rsv = rsv; + m->opcode = opcode; + m->msg_length = 0; +} + +static void wslay_event_imsg_chunks_free(struct wslay_event_imsg *m) +{ + if(!m->chunks) { + return; + } + while(!wslay_queue_empty(m->chunks)) { + wslay_event_byte_chunk_free(wslay_queue_top(m->chunks)); + wslay_queue_pop(m->chunks); + } +} + +static void wslay_event_imsg_reset(struct wslay_event_imsg *m) +{ + m->opcode = 0xffu; + m->utf8state = UTF8_ACCEPT; + wslay_event_imsg_chunks_free(m); +} + +static int wslay_event_imsg_append_chunk(struct wslay_event_imsg *m, size_t len) +{ + if(len == 0) { + return 0; + } else { + int r; + struct wslay_event_byte_chunk *chunk; + if((r = wslay_event_byte_chunk_init(&chunk, len)) != 0) { + return r; + } + if((r = wslay_queue_push(m->chunks, chunk)) != 0) { + return r; + } + m->msg_length += len; + return 0; + } +} + +static int wslay_event_omsg_non_fragmented_init +(struct wslay_event_omsg **m, uint8_t opcode, uint8_t rsv, + const uint8_t *msg, size_t msg_length) +{ + *m = (struct wslay_event_omsg*)malloc(sizeof(struct wslay_event_omsg)); + if(!*m) { + return WSLAY_ERR_NOMEM; + } + memset(*m, 0, sizeof(struct wslay_event_omsg)); + (*m)->fin = 1; + (*m)->opcode = opcode; + (*m)->rsv = rsv; + (*m)->type = WSLAY_NON_FRAGMENTED; + if(msg_length) { + (*m)->data = (uint8_t*)malloc(msg_length); + if(!(*m)->data) { + free(*m); + return WSLAY_ERR_NOMEM; + } + memcpy((*m)->data, msg, msg_length); + (*m)->data_length = msg_length; + } + return 0; +} + +static int wslay_event_omsg_fragmented_init +(struct wslay_event_omsg **m, uint8_t opcode, uint8_t rsv, + const union wslay_event_msg_source source, + wslay_event_fragmented_msg_callback read_callback) +{ + *m = (struct wslay_event_omsg*)malloc(sizeof(struct wslay_event_omsg)); + if(!*m) { + return WSLAY_ERR_NOMEM; + } + memset(*m, 0, sizeof(struct wslay_event_omsg)); + (*m)->opcode = opcode; + (*m)->rsv = rsv; + (*m)->type = WSLAY_FRAGMENTED; + (*m)->source = source; + (*m)->read_callback = read_callback; + return 0; +} + +static void wslay_event_omsg_free(struct wslay_event_omsg *m) +{ + if(!m) { + return; + } + free(m->data); + free(m); +} + +static uint8_t* wslay_event_flatten_queue(struct wslay_queue *queue, size_t len) +{ + if(len == 0) { + return NULL; + } else { + size_t off = 0; + uint8_t *buf = (uint8_t*)malloc(len); + if(!buf) { + return NULL; + } + while(!wslay_queue_empty(queue)) { + struct wslay_event_byte_chunk *chunk = wslay_queue_top(queue); + memcpy(buf+off, chunk->data, chunk->data_length); + off += chunk->data_length; + wslay_event_byte_chunk_free(chunk); + wslay_queue_pop(queue); + assert(off <= len); + } + assert(len == off); + return buf; + } +} + +static int wslay_event_is_msg_queueable(wslay_event_context_ptr ctx) +{ + return ctx->write_enabled && (ctx->close_status & WSLAY_CLOSE_QUEUED) == 0; +} + +int wslay_event_queue_close(wslay_event_context_ptr ctx, uint16_t status_code, + const uint8_t *reason, size_t reason_length) +{ + if(!wslay_event_is_msg_queueable(ctx)) { + return WSLAY_ERR_NO_MORE_MSG; + } else if(reason_length > 123) { + return WSLAY_ERR_INVALID_ARGUMENT; + } else { + uint8_t msg[128]; + size_t msg_length; + struct wslay_event_msg arg; + uint16_t ncode; + int r; + if(status_code == 0) { + msg_length = 0; + } else { + ncode = htons(status_code); + memcpy(msg, &ncode, 2); + if(reason_length) { + memcpy(msg+2, reason, reason_length); + } + msg_length = reason_length+2; + } + arg.opcode = WSLAY_CONNECTION_CLOSE; + arg.msg = msg; + arg.msg_length = msg_length; + r = wslay_event_queue_msg(ctx, &arg); + if(r == 0) { + ctx->close_status |= WSLAY_CLOSE_QUEUED; + } + return r; + } +} + +static int wslay_event_queue_close_wrapper +(wslay_event_context_ptr ctx, uint16_t status_code, + const uint8_t *reason, size_t reason_length) +{ + int r; + ctx->read_enabled = 0; + if((r = wslay_event_queue_close(ctx, status_code, reason, reason_length)) && + r != WSLAY_ERR_NO_MORE_MSG) { + return r; + } + return 0; +} + +static int wslay_event_verify_rsv_bits(wslay_event_context_ptr ctx, uint8_t rsv) +{ + return ((rsv & ~ctx->allowed_rsv_bits) == 0); +} + +int wslay_event_queue_msg(wslay_event_context_ptr ctx, + const struct wslay_event_msg *arg) +{ + return wslay_event_queue_msg_ex(ctx, arg, WSLAY_RSV_NONE); +} + +int wslay_event_queue_msg_ex(wslay_event_context_ptr ctx, + const struct wslay_event_msg *arg, uint8_t rsv) +{ + int r; + struct wslay_event_omsg *omsg; + if(!wslay_event_is_msg_queueable(ctx)) { + return WSLAY_ERR_NO_MORE_MSG; + } + /* RSV1 is not allowed for control frames */ + if((wslay_is_ctrl_frame(arg->opcode) && + (arg->msg_length > 125 || wslay_get_rsv1(rsv))) + || !wslay_event_verify_rsv_bits(ctx, rsv)) { + return WSLAY_ERR_INVALID_ARGUMENT; + } + if((r = wslay_event_omsg_non_fragmented_init + (&omsg, arg->opcode, rsv, arg->msg, arg->msg_length)) != 0) { + return r; + } + if(wslay_is_ctrl_frame(arg->opcode)) { + if((r = wslay_queue_push(ctx->send_ctrl_queue, omsg)) != 0) { + return r; + } + } else { + if((r = wslay_queue_push(ctx->send_queue, omsg)) != 0) { + return r; + } + } + ++ctx->queued_msg_count; + ctx->queued_msg_length += arg->msg_length; + return 0; +} + +int wslay_event_queue_fragmented_msg +(wslay_event_context_ptr ctx, const struct wslay_event_fragmented_msg *arg) +{ + return wslay_event_queue_fragmented_msg_ex(ctx, arg, WSLAY_RSV_NONE); +} + +int wslay_event_queue_fragmented_msg_ex(wslay_event_context_ptr ctx, + const struct wslay_event_fragmented_msg *arg, uint8_t rsv) +{ + int r; + struct wslay_event_omsg *omsg; + if(!wslay_event_is_msg_queueable(ctx)) { + return WSLAY_ERR_NO_MORE_MSG; + } + if(wslay_is_ctrl_frame(arg->opcode) || + !wslay_event_verify_rsv_bits(ctx, rsv)) { + return WSLAY_ERR_INVALID_ARGUMENT; + } + if((r = wslay_event_omsg_fragmented_init + (&omsg, arg->opcode, rsv, arg->source, arg->read_callback)) != 0) { + return r; + } + if((r = wslay_queue_push(ctx->send_queue, omsg)) != 0) { + return r; + } + ++ctx->queued_msg_count; + return 0; +} + +void wslay_event_config_set_callbacks +(wslay_event_context_ptr ctx, const struct wslay_event_callbacks *callbacks) +{ + ctx->callbacks = *callbacks; +} + +static int wslay_event_context_init +(wslay_event_context_ptr *ctx, + const struct wslay_event_callbacks *callbacks, + void *user_data) +{ + int i, r; + struct wslay_frame_callbacks frame_callbacks = { + wslay_event_frame_send_callback, + wslay_event_frame_recv_callback, + wslay_event_frame_genmask_callback + }; + *ctx = (wslay_event_context_ptr)malloc(sizeof(struct wslay_event_context)); + if(!*ctx) { + return WSLAY_ERR_NOMEM; + } + memset(*ctx, 0, sizeof(struct wslay_event_context)); + wslay_event_config_set_callbacks(*ctx, callbacks); + (*ctx)->user_data = user_data; + (*ctx)->frame_user_data.ctx = *ctx; + (*ctx)->frame_user_data.user_data = user_data; + if((r = wslay_frame_context_init(&(*ctx)->frame_ctx, &frame_callbacks, + &(*ctx)->frame_user_data)) != 0) { + wslay_event_context_free(*ctx); + return r; + } + (*ctx)->read_enabled = (*ctx)->write_enabled = 1; + (*ctx)->send_queue = wslay_queue_new(); + if(!(*ctx)->send_queue) { + wslay_event_context_free(*ctx); + return WSLAY_ERR_NOMEM; + } + (*ctx)->send_ctrl_queue = wslay_queue_new(); + if(!(*ctx)->send_ctrl_queue) { + wslay_event_context_free(*ctx); + return WSLAY_ERR_NOMEM; + } + (*ctx)->queued_msg_count = 0; + (*ctx)->queued_msg_length = 0; + for(i = 0; i < 2; ++i) { + wslay_event_imsg_reset(&(*ctx)->imsgs[i]); + (*ctx)->imsgs[i].chunks = wslay_queue_new(); + if(!(*ctx)->imsgs[i].chunks) { + wslay_event_context_free(*ctx); + return WSLAY_ERR_NOMEM; + } + } + (*ctx)->imsg = &(*ctx)->imsgs[0]; + (*ctx)->obufmark = (*ctx)->obuflimit = (*ctx)->obuf; + (*ctx)->status_code_sent = WSLAY_CODE_ABNORMAL_CLOSURE; + (*ctx)->status_code_recv = WSLAY_CODE_ABNORMAL_CLOSURE; + (*ctx)->max_recv_msg_length = (1u << 31)-1; + return 0; +} + +int wslay_event_context_server_init +(wslay_event_context_ptr *ctx, + const struct wslay_event_callbacks *callbacks, + void *user_data) +{ + int r; + if((r = wslay_event_context_init(ctx, callbacks, user_data)) != 0) { + return r; + } + (*ctx)->server = 1; + return 0; +} + +int wslay_event_context_client_init +(wslay_event_context_ptr *ctx, + const struct wslay_event_callbacks *callbacks, + void *user_data) +{ + int r; + if((r = wslay_event_context_init(ctx, callbacks, user_data)) != 0) { + return r; + } + (*ctx)->server = 0; + return 0; +} + +void wslay_event_context_free(wslay_event_context_ptr ctx) +{ + int i; + if(!ctx) { + return; + } + for(i = 0; i < 2; ++i) { + wslay_event_imsg_chunks_free(&ctx->imsgs[i]); + wslay_queue_free(ctx->imsgs[i].chunks); + } + if(ctx->send_queue) { + while(!wslay_queue_empty(ctx->send_queue)) { + wslay_event_omsg_free(wslay_queue_top(ctx->send_queue)); + wslay_queue_pop(ctx->send_queue); + } + wslay_queue_free(ctx->send_queue); + } + if(ctx->send_ctrl_queue) { + while(!wslay_queue_empty(ctx->send_ctrl_queue)) { + wslay_event_omsg_free(wslay_queue_top(ctx->send_ctrl_queue)); + wslay_queue_pop(ctx->send_ctrl_queue); + } + wslay_queue_free(ctx->send_ctrl_queue); + } + wslay_frame_context_free(ctx->frame_ctx); + wslay_event_omsg_free(ctx->omsg); + free(ctx); +} + +static void wslay_event_call_on_frame_recv_start_callback +(wslay_event_context_ptr ctx, const struct wslay_frame_iocb *iocb) +{ + if(ctx->callbacks.on_frame_recv_start_callback) { + struct wslay_event_on_frame_recv_start_arg arg; + arg.fin = iocb->fin; + arg.rsv = iocb->rsv; + arg.opcode = iocb->opcode; + arg.payload_length = iocb->payload_length; + ctx->callbacks.on_frame_recv_start_callback(ctx, &arg, ctx->user_data); + } +} + +static void wslay_event_call_on_frame_recv_chunk_callback +(wslay_event_context_ptr ctx, const struct wslay_frame_iocb *iocb) +{ + if(ctx->callbacks.on_frame_recv_chunk_callback) { + struct wslay_event_on_frame_recv_chunk_arg arg; + arg.data = iocb->data; + arg.data_length = iocb->data_length; + ctx->callbacks.on_frame_recv_chunk_callback(ctx, &arg, ctx->user_data); + } +} + +static void wslay_event_call_on_frame_recv_end_callback +(wslay_event_context_ptr ctx) +{ + if(ctx->callbacks.on_frame_recv_end_callback) { + ctx->callbacks.on_frame_recv_end_callback(ctx, ctx->user_data); + } +} + +static int wslay_event_is_valid_status_code(uint16_t status_code) +{ + return (1000 <= status_code && status_code <= 1011 && + status_code != 1004 && status_code != 1005 && status_code != 1006) || + (3000 <= status_code && status_code <= 4999); +} + +static int wslay_event_config_get_no_buffering(wslay_event_context_ptr ctx) +{ + return (ctx->config & WSLAY_CONFIG_NO_BUFFERING) > 0; +} + +int wslay_event_recv(wslay_event_context_ptr ctx) +{ + struct wslay_frame_iocb iocb; + ssize_t r; + while(ctx->read_enabled) { + memset(&iocb, 0, sizeof(iocb)); + r = wslay_frame_recv(ctx->frame_ctx, &iocb); + if(r >= 0) { + int new_frame = 0; + /* RSV1 is not allowed on control and continuation frames */ + if((!wslay_event_verify_rsv_bits(ctx, iocb.rsv)) || + (wslay_get_rsv1(iocb.rsv) && (wslay_is_ctrl_frame(iocb.opcode) || + iocb.opcode == WSLAY_CONTINUATION_FRAME)) || + (ctx->server && !iocb.mask) || (!ctx->server && iocb.mask)) { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_PROTOCOL_ERROR, NULL, 0)) != 0) { + return r; + } + break; + } + if(ctx->imsg->opcode == 0xffu) { + if(iocb.opcode == WSLAY_TEXT_FRAME || + iocb.opcode == WSLAY_BINARY_FRAME || + iocb.opcode == WSLAY_CONNECTION_CLOSE || + iocb.opcode == WSLAY_PING || + iocb.opcode == WSLAY_PONG) { + wslay_event_imsg_set(ctx->imsg, iocb.fin, iocb.rsv, iocb.opcode); + new_frame = 1; + } else { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_PROTOCOL_ERROR, NULL, 0)) != 0) { + return r; + } + break; + } + } else if(ctx->ipayloadlen == 0 && ctx->ipayloadoff == 0) { + if(iocb.opcode == WSLAY_CONTINUATION_FRAME) { + ctx->imsg->fin = iocb.fin; + } else if(iocb.opcode == WSLAY_CONNECTION_CLOSE || + iocb.opcode == WSLAY_PING || + iocb.opcode == WSLAY_PONG) { + ctx->imsg = &ctx->imsgs[1]; + wslay_event_imsg_set(ctx->imsg, iocb.fin, iocb.rsv, iocb.opcode); + } else { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_PROTOCOL_ERROR, NULL, 0)) != 0) { + return r; + } + break; + } + new_frame = 1; + } + if(new_frame) { + if(ctx->imsg->msg_length+iocb.payload_length > + ctx->max_recv_msg_length) { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_MESSAGE_TOO_BIG, NULL, 0)) != 0) { + return r; + } + break; + } + ctx->ipayloadlen = iocb.payload_length; + wslay_event_call_on_frame_recv_start_callback(ctx, &iocb); + if(!wslay_event_config_get_no_buffering(ctx) || + wslay_is_ctrl_frame(iocb.opcode)) { + if((r = wslay_event_imsg_append_chunk(ctx->imsg, + iocb.payload_length)) != 0) { + ctx->read_enabled = 0; + return r; + } + } + } + /* If RSV1 bit is set then it is too early for utf-8 validation */ + if((!wslay_get_rsv1(ctx->imsg->rsv) && + ctx->imsg->opcode == WSLAY_TEXT_FRAME) || + ctx->imsg->opcode == WSLAY_CONNECTION_CLOSE) { + size_t i; + if(ctx->imsg->opcode == WSLAY_CONNECTION_CLOSE) { + i = 2; + } else { + i = 0; + } + for(; i < iocb.data_length; ++i) { + uint32_t codep; + if(decode(&ctx->imsg->utf8state, &codep, + iocb.data[i]) == UTF8_REJECT) { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_INVALID_FRAME_PAYLOAD_DATA, NULL, 0)) != 0) { + return r; + } + break; + } + } + } + if(ctx->imsg->utf8state == UTF8_REJECT) { + break; + } + wslay_event_call_on_frame_recv_chunk_callback(ctx, &iocb); + if(iocb.data_length > 0) { + if(!wslay_event_config_get_no_buffering(ctx) || + wslay_is_ctrl_frame(iocb.opcode)) { + struct wslay_event_byte_chunk *chunk; + chunk = wslay_queue_tail(ctx->imsg->chunks); + wslay_event_byte_chunk_copy(chunk, ctx->ipayloadoff, + iocb.data, iocb.data_length); + } + ctx->ipayloadoff += iocb.data_length; + } + if(ctx->ipayloadoff == ctx->ipayloadlen) { + if(ctx->imsg->fin && + (ctx->imsg->opcode == WSLAY_TEXT_FRAME || + ctx->imsg->opcode == WSLAY_CONNECTION_CLOSE) && + ctx->imsg->utf8state != UTF8_ACCEPT) { + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_INVALID_FRAME_PAYLOAD_DATA, NULL, 0)) != 0) { + return r; + } + break; + } + wslay_event_call_on_frame_recv_end_callback(ctx); + if(ctx->imsg->fin) { + if(ctx->callbacks.on_msg_recv_callback || + ctx->imsg->opcode == WSLAY_CONNECTION_CLOSE || + ctx->imsg->opcode == WSLAY_PING) { + struct wslay_event_on_msg_recv_arg arg; + uint16_t status_code = 0; + uint8_t *msg = NULL; + size_t msg_length = 0; + if(!wslay_event_config_get_no_buffering(ctx) || + wslay_is_ctrl_frame(iocb.opcode)) { + msg = wslay_event_flatten_queue(ctx->imsg->chunks, + ctx->imsg->msg_length); + if(ctx->imsg->msg_length && !msg) { + ctx->read_enabled = 0; + return WSLAY_ERR_NOMEM; + } + msg_length = ctx->imsg->msg_length; + } + if(ctx->imsg->opcode == WSLAY_CONNECTION_CLOSE) { + const uint8_t *reason; + size_t reason_length; + if(ctx->imsg->msg_length >= 2) { + memcpy(&status_code, msg, 2); + status_code = ntohs(status_code); + if(!wslay_event_is_valid_status_code(status_code)) { + free(msg); + if((r = wslay_event_queue_close_wrapper + (ctx, WSLAY_CODE_PROTOCOL_ERROR, NULL, 0)) != 0) { + return r; + } + break; + } + reason = msg+2; + reason_length = ctx->imsg->msg_length-2; + } else { + reason = NULL; + reason_length = 0; + } + ctx->close_status |= WSLAY_CLOSE_RECEIVED; + ctx->status_code_recv = + status_code == 0 ? WSLAY_CODE_NO_STATUS_RCVD : status_code; + if((r = wslay_event_queue_close_wrapper + (ctx, status_code, reason, reason_length)) != 0) { + free(msg); + return r; + } + } else if(ctx->imsg->opcode == WSLAY_PING) { + struct wslay_event_msg arg; + arg.opcode = WSLAY_PONG; + arg.msg = msg; + arg.msg_length = ctx->imsg->msg_length; + if((r = wslay_event_queue_msg(ctx, &arg)) && + r != WSLAY_ERR_NO_MORE_MSG) { + ctx->read_enabled = 0; + free(msg); + return r; + } + } + if(ctx->callbacks.on_msg_recv_callback) { + arg.rsv = ctx->imsg->rsv; + arg.opcode = ctx->imsg->opcode; + arg.msg = msg; + arg.msg_length = msg_length; + arg.status_code = status_code; + ctx->error = 0; + ctx->callbacks.on_msg_recv_callback(ctx, &arg, ctx->user_data); + } + free(msg); + } + wslay_event_imsg_reset(ctx->imsg); + if(ctx->imsg == &ctx->imsgs[1]) { + ctx->imsg = &ctx->imsgs[0]; + } + } + ctx->ipayloadlen = ctx->ipayloadoff = 0; + } + } else { + if(r != WSLAY_ERR_WANT_READ || + (ctx->error != WSLAY_ERR_WOULDBLOCK && ctx->error != 0)) { + if((r = wslay_event_queue_close_wrapper(ctx, 0, NULL, 0)) != 0) { + return r; + } + return WSLAY_ERR_CALLBACK_FAILURE; + } + break; + } + } + return 0; +} + +static void wslay_event_on_non_fragmented_msg_popped +(wslay_event_context_ptr ctx) +{ + ctx->omsg->fin = 1; + ctx->opayloadlen = ctx->omsg->data_length; + ctx->opayloadoff = 0; +} + +static struct wslay_event_omsg* wslay_event_send_ctrl_queue_pop +(wslay_event_context_ptr ctx) +{ + /* + * If Close control frame is queued, we don't send any control frame + * other than Close. + */ + if(ctx->close_status & WSLAY_CLOSE_QUEUED) { + while(!wslay_queue_empty(ctx->send_ctrl_queue)) { + struct wslay_event_omsg *msg = wslay_queue_top(ctx->send_ctrl_queue); + wslay_queue_pop(ctx->send_ctrl_queue); + if(msg->opcode == WSLAY_CONNECTION_CLOSE) { + return msg; + } else { + wslay_event_omsg_free(msg); + } + } + return NULL; + } else { + struct wslay_event_omsg *msg = wslay_queue_top(ctx->send_ctrl_queue); + wslay_queue_pop(ctx->send_ctrl_queue); + return msg; + } +} + +int wslay_event_send(wslay_event_context_ptr ctx) +{ + struct wslay_frame_iocb iocb; + ssize_t r; + while(ctx->write_enabled && + (!wslay_queue_empty(ctx->send_queue) || + !wslay_queue_empty(ctx->send_ctrl_queue) || ctx->omsg)) { + if(!ctx->omsg) { + if(wslay_queue_empty(ctx->send_ctrl_queue)) { + ctx->omsg = wslay_queue_top(ctx->send_queue); + wslay_queue_pop(ctx->send_queue); + } else { + ctx->omsg = wslay_event_send_ctrl_queue_pop(ctx); + if(ctx->omsg == NULL) { + break; + } + } + if(ctx->omsg->type == WSLAY_NON_FRAGMENTED) { + wslay_event_on_non_fragmented_msg_popped(ctx); + } + } else if(!wslay_is_ctrl_frame(ctx->omsg->opcode) && + ctx->frame_ctx->ostate == PREP_HEADER && + !wslay_queue_empty(ctx->send_ctrl_queue)) { + if((r = wslay_queue_push_front(ctx->send_queue, ctx->omsg)) != 0) { + ctx->write_enabled = 0; + return r; + } + ctx->omsg = wslay_event_send_ctrl_queue_pop(ctx); + if(ctx->omsg == NULL) { + break; + } + /* ctrl message has WSLAY_NON_FRAGMENTED */ + wslay_event_on_non_fragmented_msg_popped(ctx); + } + if(ctx->omsg->type == WSLAY_NON_FRAGMENTED) { + memset(&iocb, 0, sizeof(iocb)); + iocb.fin = 1; + iocb.opcode = ctx->omsg->opcode; + iocb.rsv = ctx->omsg->rsv; + iocb.mask = ctx->server^1; + iocb.data = ctx->omsg->data+ctx->opayloadoff; + iocb.data_length = ctx->opayloadlen-ctx->opayloadoff; + iocb.payload_length = ctx->opayloadlen; + r = wslay_frame_send(ctx->frame_ctx, &iocb); + if(r >= 0) { + ctx->opayloadoff += r; + if(ctx->opayloadoff == ctx->opayloadlen) { + --ctx->queued_msg_count; + ctx->queued_msg_length -= ctx->omsg->data_length; + if(ctx->omsg->opcode == WSLAY_CONNECTION_CLOSE) { + uint16_t status_code = 0; + ctx->write_enabled = 0; + ctx->close_status |= WSLAY_CLOSE_SENT; + if(ctx->omsg->data_length >= 2) { + memcpy(&status_code, ctx->omsg->data, 2); + status_code = ntohs(status_code); + } + ctx->status_code_sent = + status_code == 0 ? WSLAY_CODE_NO_STATUS_RCVD : status_code; + } + wslay_event_omsg_free(ctx->omsg); + ctx->omsg = NULL; + } else { + break; + } + } else { + if(r != WSLAY_ERR_WANT_WRITE || + (ctx->error != WSLAY_ERR_WOULDBLOCK && ctx->error != 0)) { + ctx->write_enabled = 0; + return WSLAY_ERR_CALLBACK_FAILURE; + } + break; + } + } else { + if(ctx->omsg->fin == 0 && ctx->obuflimit == ctx->obufmark) { + int eof = 0; + r = ctx->omsg->read_callback(ctx, ctx->obuf, sizeof(ctx->obuf), + &ctx->omsg->source, + &eof, ctx->user_data); + if(r == 0) { + break; + } else if(r < 0) { + ctx->write_enabled = 0; + return WSLAY_ERR_CALLBACK_FAILURE; + } + ctx->obuflimit = ctx->obuf+r; + if(eof) { + ctx->omsg->fin = 1; + } + ctx->opayloadlen = r; + ctx->opayloadoff = 0; + } + memset(&iocb, 0, sizeof(iocb)); + iocb.fin = ctx->omsg->fin; + iocb.opcode = ctx->omsg->opcode; + iocb.rsv = ctx->omsg->rsv; + iocb.mask = ctx->server ? 0 : 1; + iocb.data = ctx->obufmark; + iocb.data_length = ctx->obuflimit-ctx->obufmark; + iocb.payload_length = ctx->opayloadlen; + r = wslay_frame_send(ctx->frame_ctx, &iocb); + if(r >= 0) { + ctx->obufmark += r; + if(ctx->obufmark == ctx->obuflimit) { + ctx->obufmark = ctx->obuflimit = ctx->obuf; + if(ctx->omsg->fin) { + --ctx->queued_msg_count; + wslay_event_omsg_free(ctx->omsg); + ctx->omsg = NULL; + } else { + ctx->omsg->opcode = WSLAY_CONTINUATION_FRAME; + /* RSV1 is not set on continuation frames */ + ctx->omsg->rsv = ctx->omsg->rsv & ~WSLAY_RSV1_BIT; + } + } else { + break; + } + } else { + if(r != WSLAY_ERR_WANT_WRITE || + (ctx->error != WSLAY_ERR_WOULDBLOCK && + ctx->error != 0)) { + ctx->write_enabled = 0; + return WSLAY_ERR_CALLBACK_FAILURE; + } + break; + } + } + } + return 0; +} + +void wslay_event_set_error(wslay_event_context_ptr ctx, int val) +{ + ctx->error = val; +} + +int wslay_event_want_read(wslay_event_context_ptr ctx) +{ + return ctx->read_enabled; +} + +int wslay_event_want_write(wslay_event_context_ptr ctx) +{ + return ctx->write_enabled && + (!wslay_queue_empty(ctx->send_queue) || + !wslay_queue_empty(ctx->send_ctrl_queue) || ctx->omsg); +} + +void wslay_event_shutdown_read(wslay_event_context_ptr ctx) +{ + ctx->read_enabled = 0; +} + +void wslay_event_shutdown_write(wslay_event_context_ptr ctx) +{ + ctx->write_enabled = 0; +} + +int wslay_event_get_read_enabled(wslay_event_context_ptr ctx) +{ + return ctx->read_enabled; +} + +int wslay_event_get_write_enabled(wslay_event_context_ptr ctx) +{ + return ctx->write_enabled; +} + +int wslay_event_get_close_received(wslay_event_context_ptr ctx) +{ + return (ctx->close_status & WSLAY_CLOSE_RECEIVED) > 0; +} + +int wslay_event_get_close_sent(wslay_event_context_ptr ctx) +{ + return (ctx->close_status & WSLAY_CLOSE_SENT) > 0; +} + +void wslay_event_config_set_allowed_rsv_bits(wslay_event_context_ptr ctx, + uint8_t rsv) +{ + /* We currently only allow WSLAY_RSV1_BIT or WSLAY_RSV_NONE */ + ctx->allowed_rsv_bits = rsv & WSLAY_RSV1_BIT; +} + +void wslay_event_config_set_no_buffering(wslay_event_context_ptr ctx, int val) +{ + if(val) { + ctx->config |= WSLAY_CONFIG_NO_BUFFERING; + } else { + ctx->config &= ~WSLAY_CONFIG_NO_BUFFERING; + } +} + +void wslay_event_config_set_max_recv_msg_length(wslay_event_context_ptr ctx, + uint64_t val) +{ + ctx->max_recv_msg_length = val; +} + +uint16_t wslay_event_get_status_code_received(wslay_event_context_ptr ctx) +{ + return ctx->status_code_recv; +} + +uint16_t wslay_event_get_status_code_sent(wslay_event_context_ptr ctx) +{ + return ctx->status_code_sent; +} + +size_t wslay_event_get_queued_msg_count(wslay_event_context_ptr ctx) +{ + return ctx->queued_msg_count; +} + +size_t wslay_event_get_queued_msg_length(wslay_event_context_ptr ctx) +{ + return ctx->queued_msg_length; +} |