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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "protocol.h"
void ws_protocol_parse_byte(ws_s_protocol_parser_state* state, char input) {
switch(input) {
case WS_PROTOCOL_C_NEWLINE: {
if (!state->valid) return;
break;
}
case WS_PROTOCOL_C_SPACE: {
if (!state->valid) return;
state->arg_len++;
return;
}
case WS_PROTOCOL_C_NULL: {
state->valid = false;
return;
}
default: {
if (!state->valid) return;
state->cmd[state->cmd_len++] = input;
state->args_len[state->arg_len] += 1;
if (state->cmd_len == WS_PROTOCOL_CMD_BUFFER_LEN) state->valid = false;
return;
}
}
// arg_len is used as an index while parsing, so add 1 to get length
state->arg_len++;
// parse cmd into argc and argv
ws_protocol_cmd_init(state);
// create response
ws_s_protocol_response* response = ws_protocol_parse_finished(state->target);
//TODO: send response
free(response->msg);
free(response);
return;
}
ws_s_protocol_response* ws_protocol_parse_finished(ws_s_protocol_parsed_cmd* parsed_cmd) {
ws_s_protocol_response* response = malloc(sizeof(ws_s_protocol_response));
if (strncmp("last-records", parsed_cmd->argv[0], 12) == 0) {
printf("last-records found!\n");
}
response->msg = ws_bin_s_alloc(50);
strncpy((char*) response->msg->data, "hello world!\n\0", 14);
return response;
}
void ws_protocol_parse_bytes(ws_s_protocol_parser_state* state, char* input, unsigned int length) {
for (unsigned int i = 0; i < length; i++) ws_protocol_parse_byte(state, input[i]);
}
ws_s_protocol_parser_state* ws_protocol_parser_alloc() {
ws_s_protocol_parser_state* parser_state = malloc(sizeof(ws_s_protocol_parser_state) + sizeof(uint16_t) * WS_PROTOCOL_CMD_MAX_ARGUMENTS);
parser_state->cmd = malloc(sizeof(char) * WS_PROTOCOL_CMD_BUFFER_LEN);
parser_state->valid = true;
parser_state->cmd_len = 0;
parser_state->arg_len = 0;
parser_state->target = NULL;
return parser_state;
}
void ws_protocol_cmd_init(ws_s_protocol_parser_state* state) {
state->target = malloc(sizeof(ws_s_protocol_parsed_cmd) + sizeof(char*) * state->arg_len);
for (unsigned int i = 0; i < state->arg_len; i++)
state->target->argv[i] = malloc(sizeof(char) * (state->args_len[i] + 1));
state->target->argc = state->arg_len;
unsigned int head = 0;
for (unsigned int i = 0; i < state->arg_len; i++) {
strncpy(state->target->argv[i], &state->cmd[head], state->args_len[i]);
state->target->argv[i][state->args_len[i]] = 0x00; // terminate argument with null byte
head += state->args_len[i];
}
}
void ws_protocol_parser_free(ws_s_protocol_parser_state* state) {
if (state == NULL) return;
if (state->target != NULL) ws_protocol_cmd_free(state->target);
free(state->cmd);
free(state);
state = NULL;
return;
}
void ws_protocol_cmd_free(ws_s_protocol_parsed_cmd* cmd) {
for (unsigned int i = 0; i < cmd->argc; i++)
free(cmd->argv[i]);
free(cmd);
cmd = NULL;
return;
}
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