/** * \brief This function try to pack message that is going to be * sent in STREAM OPEN state * * \param[in] *C The pointer at context * * \return This function return 1, when there is something to send, * it returns -1, when there is nothing to send and it returns 0, when * there is some error */ int v_STREAM_pack_message(struct vContext *C) { struct VS_CTX *vs_ctx = CTX_server_ctx(C); struct VSession *vsession = CTX_current_session(C); struct VStreamConn *conn = CTX_current_stream_conn(C); struct IO_CTX *io_ctx = CTX_io_ctx(C); struct VMessage *s_message = CTX_s_message(C); struct Generic_Cmd *cmd, *fake_cmd; int ret = -1, queue_size = 0, buffer_pos = 0, prio_cmd_count, cmd_rank=0; int8 cmd_share; int16 prio, max_prio, min_prio; uint16 cmd_count, cmd_len, prio_win, swin, sent_size, tot_cmd_size; real32 prio_sum_high, prio_sum_low, r_prio; int is_fake_cmd_received = 0; /* Is here something to send? */ if((v_out_queue_get_count(vsession->out_queue) > 0) || (vsession->tmp_flags & SYS_CMD_NEGOTIATE_FPS)) { /* Get current size of data in TCP outgoing buffer */ #ifdef __linux__ if( ioctl(io_ctx->sockfd, SIOCOUTQ, &queue_size) == -1 ) { v_print_log(VRS_PRINT_ERROR, "ioctl(%d, SIOCOUTQ, ...): %s\n", io_ctx->sockfd, strerror(errno)); return 0; } #endif /* Compute, how many data could be added to the TCP stack? */ swin = conn->socket_buffer_size - queue_size; buffer_pos = VERSE_MESSAGE_HEADER_SIZE; s_message->sys_cmd[0].cmd.id = CMD_RESERVED_ID; /* When negotiated and used FPS is different, then pack negotiate command * for FPS */ if(vsession->fps_host != vsession->fps_peer) { cmd_rank += v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank, CMD_CHANGE_L_ID, FTR_FPS, &vsession->fps_host, NULL); } else { if(vsession->tmp_flags & SYS_CMD_NEGOTIATE_FPS) { cmd_rank += v_add_negotiate_cmd(s_message->sys_cmd, cmd_rank, CMD_CONFIRM_L_ID, FTR_FPS, &vsession->fps_peer, NULL); /* Send confirmation only once for received system command */ vsession->tmp_flags &= ~SYS_CMD_NEGOTIATE_FPS; } } buffer_pos += v_pack_stream_system_commands(s_message, &io_ctx->buf[buffer_pos]); max_prio = v_out_queue_get_max_prio(vsession->out_queue); min_prio = v_out_queue_get_min_prio(vsession->out_queue); prio_sum_high = v_out_queue_get_prio_sum_high(vsession->out_queue); prio_sum_low = v_out_queue_get_prio_sum_low(vsession->out_queue); v_print_log(VRS_PRINT_DEBUG_MSG, "Packing prio queues, cmd count: %d\n", v_out_queue_get_count(vsession->out_queue)); /* Go through all priorities and pick commands from priority queues */ for(prio = max_prio; prio >= min_prio; prio--) { prio_cmd_count = v_out_queue_get_count_prio(vsession->out_queue, prio); if(prio_cmd_count > 0) { r_prio = v_out_queue_get_prio(vsession->out_queue, prio); /* Compute size of buffer that could be occupied by * commands from this queue */ if(prio >= VRS_DEFAULT_PRIORITY) { prio_win = ((swin - buffer_pos)*r_prio)/prio_sum_high; } else { prio_win = ((swin - buffer_pos)*r_prio)/prio_sum_low; } /* Debug print */ v_print_log(VRS_PRINT_DEBUG_MSG, "Queue: %d, count: %d, r_prio: %6.3f, prio_win: %d\n", prio, prio_cmd_count, r_prio, prio_win); /* Get total size of commands that were stored in queue (sent_size) */ sent_size = 0; tot_cmd_size = 0; while(prio_cmd_count > 0) { cmd_share = 0; cmd_count = 0; cmd_len = prio_win - sent_size; /* Pack commands from queues with high priority to the buffer */ cmd = v_out_queue_pop(vsession->out_queue, prio, &cmd_count, &cmd_share, &cmd_len); if(cmd != NULL) { /* Is this command fake command? */ if(cmd->id < MIN_CMD_ID) { if(cmd->id == FAKE_CMD_CONNECT_TERMINATE) { /* Close connection */ struct VS_CTX *vs_ctx = CTX_server_ctx(C); if(vs_ctx != NULL) { vsession->stream_conn->host_state = TCP_SERVER_STATE_CLOSING; } else { vsession->stream_conn->host_state = TCP_CLIENT_STATE_CLOSING; } } else if(cmd->id == FAKE_CMD_FPS) { struct Fps_Cmd *fps_cmd = (struct Fps_Cmd*)cmd; /* Change value of FPS. It will be sent in negotiate command * until it is confirmed be the peer (server) */ vsession->fps_host = fps_cmd->fps; } } else { buffer_pos += tot_cmd_size = v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, v_cmd_size(cmd), 0); if(is_log_level(VRS_PRINT_DEBUG_MSG)) { printf("%c[%d;%dm", 27, 1, 32); v_cmd_print(VRS_PRINT_DEBUG_MSG, cmd); printf("%c[%dm", 27, 0); } sent_size += tot_cmd_size; } fake_cmd = v_cmd_fake_ack(cmd); if(fake_cmd != NULL) { is_fake_cmd_received = 1; /* Push command to the queue of incoming commands */ v_in_queue_push(vsession->in_queue, fake_cmd); /* Print content of fake command */ v_fake_cmd_print(VRS_PRINT_DEBUG_MSG, fake_cmd); } /* It is not necessary to put cmd to history of sent commands, * when TCP is used. */ v_cmd_destroy(&cmd); prio_cmd_count--; } else { break; } } } } s_message->header.len = io_ctx->buf_size = buffer_pos; s_message->header.version = VRS_VERSION; /* Pack header to the beginning of the buffer */ v_pack_message_header(s_message, io_ctx->buf); /* Debug print of command to be send */ if(is_log_level(VRS_PRINT_DEBUG_MSG)) { v_print_send_message(C); } /* When pure ack packet caused adding some fake commands to the queue, then * poke server data thread */ if( (vs_ctx != NULL) && (is_fake_cmd_received == 1)) { sem_post(vs_ctx->data.sem); } ret = 1; } return ret; }
/** * \brief This function packs and compress command to the packet from one * priority queue. * * \param[in] *C The verse context * \param[in] *sent_packet The pointer at structure with send packet * \param[in] buffer_pos The curent size of buffer of sent packet * \param[in] prio The priority of sub queue * \param[in] prio_win The window size of current prio queue * \param[out] tot_cmd_size The total size of commands that were poped from prio queue */ static int pack_prio_queue(struct vContext *C, struct VSent_Packet *sent_packet, int buffer_pos, uint8 prio, uint16 prio_win, uint16 *tot_cmd_size) { struct VSession *vsession = CTX_current_session(C); struct VDgramConn *vconn = CTX_current_dgram_conn(C); struct IO_CTX *io_ctx = CTX_io_ctx(C); struct Generic_Cmd *cmd; int ret, last_cmd_count = 0; uint16 cmd_count, cmd_len, cmd_size, sum_len=0; int8 cmd_share; uint8 last_cmd_id = CMD_RESERVED_ID; while( (v_out_queue_get_count_prio(vsession->out_queue, prio) > 0) && (sum_len < prio_win) && (buffer_pos < vconn->io_ctx.mtu)) { cmd_count = 0; cmd_share = 0; /* Compute how many commands could be compressed to the packet * and compute right length of compressed commands. */ cmd_len = ((prio_win - sum_len)<(vconn->io_ctx.mtu - buffer_pos)) ? (prio_win - sum_len) : (vconn->io_ctx.mtu - buffer_pos); /* Remove command from queue */ cmd = v_out_queue_pop(vsession->out_queue, prio, &cmd_count, &cmd_share, &cmd_len); /* When it is not possible to pop more commands from queue, then break * while loop */ if(cmd == NULL) { break; } /* Is this command fake command? */ if(cmd->id < MIN_CMD_ID) { if(cmd->id == FAKE_CMD_CONNECT_TERMINATE) { struct VS_CTX *vs_ctx = CTX_server_ctx(C); if(vs_ctx != NULL) { vconn->host_state = UDP_SERVER_STATE_CLOSEREQ; } else { vconn->host_state = UDP_CLIENT_STATE_CLOSING; } } else if(cmd->id == FAKE_CMD_FPS) { struct Fps_Cmd *fps_cmd = (struct Fps_Cmd*)cmd; /* Change value of FPS. It will be sent in negotiate command * until it is confirmed be the peer (server) */ vsession->fps_host = fps_cmd->fps; } v_cmd_destroy(&cmd); } else { /* What was size of command in queue */ cmd_size = v_cmd_size(cmd); if(!(buffer_pos < (vconn->io_ctx.mtu - cmd_size))) { /* When there is not enough space for other command, * then push command back to the beginning of queue. */ v_out_queue_push_head(vsession->out_queue, prio, cmd); break; } else { /* Update total size of commands that were poped from queue */ *tot_cmd_size += cmd_size; /* When compression is not allowed, then add this command as is */ if( vconn->host_cmd_cmpr == CMPR_NONE) { cmd_count = 0; cmd_len = cmd_size; /* Debug print */ v_print_log(VRS_PRINT_DEBUG_MSG, "Cmd: %d, count: %d, length: %d\n", cmd->id, cmd_count, cmd_len); /* Add command to the buffer */ buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, cmd_len, 0); } else { /* When command compression is allowed and was ID of command changed? */ if( (cmd->id != last_cmd_id) || (last_cmd_count <= 0) ) { /* When this command is alone, then use default command size */ if(cmd_count == 0) { cmd_len = cmd_size; } else { /* FIXME: do not recompute command length here, but do it right, * when command is added to the queue */ cmd_len = v_cmds_len(cmd, cmd_count, cmd_share, cmd_len); } /* Debug print */ v_print_log(VRS_PRINT_DEBUG_MSG, "Cmd: %d, count: %d, length: %d\n", cmd->id, cmd_count, cmd_len); /* Add command to the buffer */ buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, cmd_len, cmd_share); /* Set up current count of commands in the line */ last_cmd_count = cmd_count; /* Update summary of commands length */ sum_len += cmd_len; } else { buffer_pos += v_cmd_pack(&io_ctx->buf[buffer_pos], cmd, 0, cmd_share); } } /* Print command */ v_cmd_print(VRS_PRINT_DEBUG_MSG, cmd); /* TODO: remove command alias here (layer value set/unset) */ /* Add command to the packet history */ ret = v_packet_history_add_cmd(&vconn->packet_history, sent_packet, cmd, prio); assert(ret==1); /* Update last command id */ last_cmd_id = cmd->id; /* Decrement counter of commands in queue */ last_cmd_count--; } } } return buffer_pos; }
/* * \brief This function pop command from queue with specific priority. * * Returned command is allocated on the heap and have to be free from calling * function. When *count is not NULL, then this function will write number of * commands with same ID that could be compressed on this address. When *len * is not NULL, then this function will write length of compressed commands * at this address. When *len value is not 0, then this value represents maximal * size of commands that could be removed from this priority queue. * * \param[in] *out_queue The pointer at list of priority queues * \param[in] prio The value of priority * \param[out] *count The pointer at count of commands with same id that * could be compressed. * \param[out] *share The size of address that could be shared * \param[out] *len The length of compressed commands. * * \return This function returns pointer at command. This command is allocated * at the heap. */ struct Generic_Cmd *v_out_queue_pop(struct VOutQueue *out_queue, uint8 prio, uint16 *count, int8 *share, uint16 *len) { struct VPrioOutQueue *prio_queue = out_queue->queues[prio]; struct VOutQueueCommand *queue_cmd; struct Generic_Cmd *cmd=NULL; int i, can_pop_cmd = 1; /* Lock mutex */ pthread_mutex_lock(&out_queue->lock); /*printf("\tcount: %u, share: %u, len: %u\n", *count, *share, *len);*/ queue_cmd = prio_queue->cmds.first; if(queue_cmd != NULL ) { cmd = (struct Generic_Cmd *)queue_cmd->vbucket->data; assert(cmd != NULL); /* Return value of count and length of compressed commands */ if(queue_cmd->counter != NULL) { if(count != NULL) { *count = *queue_cmd->counter; } if(share != NULL) { *share = *queue_cmd->share; } if(len != NULL) { /* When *len value is not 0, then this value represents maximal * size of buffer that could be filled with this priority queue. This * function should return value, that is smaller or equal than this * maximum. */ if(*len != 0) { if(*len < *queue_cmd->len) { if (count != NULL) { *count = v_cmd_count(cmd, *len, *queue_cmd->share); /* FIXME: compute length and count correctly, when command is added to the queue */ *count = ((*count) > (*queue_cmd->counter)) ? *queue_cmd->counter : *count; /* Is enough space in buffer to unpack this command? */ if(*count == 0) { can_pop_cmd = 0; } *len = v_cmds_len(cmd, *count, *queue_cmd->share, 0); } else { can_pop_cmd = 0; } } else { *len = *queue_cmd->len; } } else { *len = *queue_cmd->len; } } } else { if(count != NULL) { *count = 0; } if(share != NULL) { *share = 0; } if(len != NULL) { if(v_cmd_size(cmd) > *len) { can_pop_cmd = 0; } *len = 0; } } /* Is it possible to pop command from the queue */ if(can_pop_cmd == 1) { /* Remove command from hashed linked list */ v_hash_array_remove_item(&out_queue->cmds[cmd->id]->cmds, (void*)cmd); /* Remove command from priority queue */ v_list_rem_item(&prio_queue->cmds, queue_cmd); /* Update total count and size of commands */ out_queue->count--; out_queue->size -= out_queue->cmds[cmd->id]->item_size; /* Update count and size of commands in subqueue with priority prio */ out_queue->queues[prio]->count--; out_queue->queues[prio]->size -= out_queue->cmds[cmd->id]->item_size; /* If needed, then update counter of commands with the same id in the queue */ if(queue_cmd->counter != NULL) { *queue_cmd->counter -= 1; /* Free values, when it's last command in the queue */ if(*queue_cmd->counter == 0) { free(queue_cmd->counter); queue_cmd->counter = NULL; free(queue_cmd->share); queue_cmd->share = NULL; free(queue_cmd->len); queue_cmd->len = NULL; } } /* When this priority queue is empty now, then update summary of * real priorities and it is possibly necessary to change maximal * or minimal priority queue*/ if(out_queue->queues[prio]->count == 0) { if(prio>=VRS_DEFAULT_PRIORITY) { out_queue->r_prio_sum_high -= out_queue->queues[prio]->r_prio; } else { out_queue->r_prio_sum_low -= out_queue->queues[prio]->r_prio; } if(out_queue->max_prio == prio && out_queue->min_prio != prio) { for(i=prio; i>=out_queue->min_prio; i--) { if(out_queue->queues[i]->count != 0) { out_queue->max_prio = i; break; } } } else if(out_queue->min_prio == prio && out_queue->max_prio != prio) { for(i=prio; i<=out_queue->max_prio; i++) { if(out_queue->queues[i]->count != 0) { out_queue->min_prio = i; break; } } } else if(out_queue->min_prio == prio && out_queue->max_prio == prio) { out_queue->min_prio = out_queue->max_prio = VRS_DEFAULT_PRIORITY; } } /* Free queue command */ free(queue_cmd); } else { cmd = NULL; } } pthread_mutex_unlock(&out_queue->lock); return cmd; }
/** * \brief This function removes packet with id from history of sent packets. * It removes all its commands from the command history too. * * \param[in] *C The verse context. * \param[in] id The ID of packet, the will be removed from the history. * * \return This function returns 1, then packet with id was found in the history * and it returns 0 otherwise. */ int v_packet_history_rem_packet(struct vContext *C, uint32 id) { struct VS_CTX *vs_ctx = CTX_server_ctx(C); struct VDgramConn *dgram_conn = CTX_current_dgram_conn(C); struct VPacket_History *history = &dgram_conn->packet_history; struct VPacket *r_packet = CTX_r_packet(C); struct VSent_Packet *sent_packet; int ret = 0, is_fake_cmd_received = 0; sent_packet = v_packet_history_find_packet(history, id); if(sent_packet != NULL) { struct VSent_Command *sent_cmd; v_print_log(VRS_PRINT_DEBUG_MSG, "Removing packet: %d from history\n", sent_packet->id); /* Go through the whole list of sent commands and free them from the * hashed linked list */ sent_cmd = sent_packet->cmds.first; while(sent_cmd != NULL) { /* Remove own command from hashed linked list if it wasn't already * removed, when command was obsoleted by some newer packet */ if(sent_cmd->vbucket!=NULL) { struct Generic_Cmd *cmd = (struct Generic_Cmd*)sent_cmd->vbucket->data; /* Bucket has to include some data */ assert(sent_cmd->vbucket->data!=NULL); /* Decrease total size of commands that were sent and wasn't acknowladged yet*/ dgram_conn->sent_size -= v_cmd_size(cmd); /* Put fake command for create/destroy commands at verse server */ if(vs_ctx != NULL) { struct VSession *vsession = CTX_current_session(C); struct Generic_Cmd *fake_cmd = NULL; switch(cmd->id) { case CMD_NODE_CREATE: fake_cmd = v_fake_node_create_ack_create(UINT32(cmd->data[UINT16_SIZE + UINT32_SIZE])); break; case CMD_NODE_DESTROY: fake_cmd = v_fake_node_destroy_ack_create(UINT32(cmd->data[0])); break; case CMD_TAGGROUP_CREATE: fake_cmd = v_fake_taggroup_create_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE])); break; case CMD_TAGGROUP_DESTROY: fake_cmd = v_fake_taggroup_destroy_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE])); break; case CMD_TAG_CREATE: fake_cmd = v_tag_create_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE]), UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE])); break; case CMD_TAG_DESTROY: fake_cmd = v_tag_destroy_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE]), UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE])); break; case CMD_LAYER_CREATE: fake_cmd = v_fake_layer_create_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE + UINT16_SIZE])); break; case CMD_LAYER_DESTROY: fake_cmd = v_fake_layer_destroy_ack_create(UINT32(cmd->data[0]), UINT16(cmd->data[UINT32_SIZE])); break; default: break; } if(fake_cmd != NULL) { is_fake_cmd_received = 1; /* Push command to the queue of incomming commands */ v_in_queue_push(vsession->in_queue, fake_cmd); /* Print content of fake command */ v_fake_cmd_print(VRS_PRINT_DEBUG_MSG, fake_cmd); } } /* Remove command from the history of sent commands */ ret = v_hash_array_remove_item(&history->cmd_hist[sent_cmd->id]->cmds, sent_cmd->vbucket->data); if(ret == 1) { /* Destroy command */ v_cmd_destroy(&cmd); } else { v_print_log(VRS_PRINT_ERROR, "Unable to remove command id: %d\n", sent_cmd->id); ret = 0; } } sent_cmd = sent_cmd->next; } /* Free linked list of sent commands */ v_list_free(&sent_packet->cmds); /* Remove packet itself from the linked list of sent packet */ v_list_rem_item(&history->packets, sent_packet); free(sent_packet); ret = 1; } else { /* When acknowledged payload packet is not found in history, then it * is OK, because it is probably keep alive packet without any node * commands */ v_print_log(VRS_PRINT_DEBUG_MSG, "Packet with id: %d, not found in history\n", id); } /* When pure ack packet caused adding some fake commands to the queue, then * poke server data thread */ if( (vs_ctx != NULL) && (is_fake_cmd_received == 1) && (r_packet->data == NULL)) { sem_post(vs_ctx->data.sem); } return ret; }