/************************************************************************
* NAME: net_if_find
*
* DESCRIPTION: Returns a network interface given its name.
*************************************************************************/
fnet_netif_desc_t fnet_netif_get_by_name( char *name )
{
fnet_netif_t *netif;
fnet_netif_desc_t result = (fnet_netif_desc_t)FNET_NULL;
fnet_os_mutex_lock();
if(name)
for (netif = fnet_netif_list; netif != 0; netif = netif->next)
{
if(fnet_strncmp(name, netif->name, FNET_NETIF_NAMELEN) == 0)
{
result = (fnet_netif_desc_t)netif;
break;
}
}
fnet_os_mutex_unlock();
return result;
}
/************************************************************************
* NAME: fnet_http_state_machine
*
* DESCRIPTION: Http server state machine.
************************************************************************/
static void fnet_http_state_machine( void *http_if_p )
{
struct sockaddr foreign_addr;
int len;
int res;
struct fnet_http_if *http = (struct fnet_http_if *)http_if_p;
int iteration;
char *ch;
int i;
struct fnet_http_session_if *session;
for(i=0; i<FNET_CFG_HTTP_SESSION_MAX; i++)
{
session = &http->session[i];
http->session_active = session;
for(iteration = 0; iteration < FNET_HTTP_ITERATION_NUMBER; iteration++)
{
switch(session->state)
{
/*---- LISTENING ------------------------------------------------*/
case FNET_HTTP_STATE_LISTENING:
len = sizeof(foreign_addr);
if((session->socket_foreign = accept(http->socket_listen, &foreign_addr, &len)) != SOCKET_INVALID)
{
#if FNET_CFG_DEBUG_HTTP
{
char ip_str[FNET_IP_ADDR_STR_SIZE];
fnet_inet_ntop(foreign_addr.sa_family, (char*)(foreign_addr.sa_data), ip_str, sizeof(ip_str));
FNET_DEBUG_HTTP("");
FNET_DEBUG_HTTP("HTTP: RX Request From: %s; Port: %d.", ip_str, fnet_ntohs(foreign_addr.sa_port));
}
#endif
/* Reset response & request parameters.*/
fnet_memset_zero(&session->response, sizeof(struct fnet_http_response));
fnet_memset_zero(&session->request, sizeof(struct fnet_http_request));
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
session->response.content_length = -1; /* No content length by default.*/
/* Default HTTP version response.*/
session->response.version.major = FNET_HTTP_VERSION_MAJOR;
session->response.version.minor = FNET_HTTP_VERSION_MINOR;
session->response.tx_data = fnet_http_tx_status_line;
#endif
session->state_time = fnet_timer_ticks(); /* Reset timeout. */
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_RX_REQUEST; /* => WAITING HTTP REQUEST */
}
break;
/*---- RX_LINE -----------------------------------------------*/
case FNET_HTTP_STATE_RX_REQUEST:
do
{
/* Read character by character.*/
ch = &session->buffer[session->buffer_actual_size];
if((res = recv(session->socket_foreign, ch, 1, 0) )!= SOCKET_ERROR)
{
if(res > 0) /* Received a data.*/
{
session->state_time = fnet_timer_ticks(); /* Reset timeout.*/
session->buffer_actual_size++;
if(*ch == '\r')
*ch = '\0';
else if(*ch == '\n')
/* Line received.*/
{
char * req_buf = &session->buffer[0];
*ch = '\0';
if(session->request.method == 0)
/* Parse Request line.*/
{
const struct fnet_http_method **method = &fnet_http_method_list[0];
FNET_DEBUG_HTTP("HTTP: RX Request: %s", req_buf);
/* Determine the method type. */
while(*method)
{
if ( !fnet_strcmp_splitter(req_buf, (*method)->token, ' ') )
{
req_buf+=fnet_strlen((*method)->token);
session->request.method = *method;
break;
}
method++;
}
/* Check if the method is supported? */
if(session->request.method && session->request.method->handle)
{
/* Parse URI.*/
req_buf = fnet_http_uri_parse(req_buf, &session->request.uri);
FNET_DEBUG_HTTP("HTTP: URI Path = %s; Query = %s", http->request.uri.path, http->request.uri.query);
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
/* Parse HTTP/x.x version.*/
fnet_http_version_parse(++req_buf, &session->response.version);
/* Check the highest supported HTTP version.*/
if(((session->response.version.major<<8)|session->response.version.minor) > ((FNET_HTTP_VERSION_MAJOR<<8)|FNET_HTTP_VERSION_MINOR))
{
session->response.version.major = FNET_HTTP_VERSION_MAJOR;
session->response.version.minor = FNET_HTTP_VERSION_MINOR;
}
if(session->response.version.major == 0)
/* HTTP/0.x */
{
session->state = FNET_HTTP_STATE_CLOSING; /* Client does not support HTTP/1.x*/
break;
}
#if FNET_CFG_HTTP_AUTHENTICATION_BASIC
/* Check Authentification.*/
fnet_http_auth_validate_uri(http);
#endif
#endif/*FNET_CFG_HTTP_VERSION_MAJOR*/
/* Call method initial handler.*/
res = session->request.method->handle(http, &session->request.uri);
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
if(fnet_http_status_ok(res) == FNET_OK)
#else
if((res == FNET_OK))
#endif
{
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
session->buffer_actual_size = 0;
/* => Parse Header line.*/
#else /* HTTP/0.9 */
session->response.tx_data = session->request.method->send;
/* Reset buffer pointers.*/
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_TX; /* Send data.*/
#endif
}
/* Method error.*/
else /* Error.*/
{
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
/* Default code = FNET_HTTP_STATUS_CODE_INTERNAL_SERVER_ERROR. */
if(res != FNET_ERR)
session->response.status.code = (fnet_http_status_code_t)res;
/* Send status line.*/
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_TX; /* Send error.*/
#else /* HTTP/0.9 */
session->state = FNET_HTTP_STATE_CLOSING;
#endif
}
}
/* Method is not supported.*/
else /* Error.*/
{
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
session->response.status.code = FNET_HTTP_STATUS_CODE_NOT_IMPLEMENTED;
/* Send status line.*/
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_TX; /* Send error.*/
#else /* HTTP/0.9 */
session->state = FNET_HTTP_STATE_CLOSING;
#endif
}
}
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
/* Parse Header line.*/
else
{
if(session->request.skip_line == 0)
{
if(*req_buf == 0)
/* === Empty line => End of the request header. ===*/
{
#if FNET_CFG_HTTP_AUTHENTICATION_BASIC
if(session->response.auth_entry)
/* Send UNAUTHORIZED error.*/
session->response.status.code = FNET_HTTP_STATUS_CODE_UNAUTHORIZED;
else /* Send Data.*/
#endif
session->response.status.code = FNET_HTTP_STATUS_CODE_OK;
#if FNET_CFG_HTTP_POST
if(session->request.content_length > 0)
/* RX Entity-Body.*/
{
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_RX;
}
else
#endif
/* TX Full-Responce.*/
{
/* Send status line.*/
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_TX;
}
break;
}
else
/* === Parse header fields. ===*/
{
FNET_DEBUG_HTTP("HTTP: RX Header: %s", req_buf);
#if FNET_CFG_HTTP_AUTHENTICATION_BASIC
/* --- Authorization: ---*/
if (session->response.auth_entry && fnet_strncmp(req_buf, FNET_HTTP_HEADER_FIELD_AUTHORIZATION, sizeof(FNET_HTTP_HEADER_FIELD_AUTHORIZATION)-1) == 0)
/* Authetication is required.*/
{
char *auth_str = &req_buf[sizeof(FNET_HTTP_HEADER_FIELD_AUTHORIZATION)-1];
/* Validate credentials.*/
if(fnet_http_auth_validate_credentials(http, auth_str) == FNET_OK)
session->response.auth_entry = 0; /* Authorization is succesful.*/
}
#endif
#if FNET_CFG_HTTP_POST
/* --- Content-Length: ---*/
if (session->request.method->receive && fnet_strncmp(req_buf, FNET_HTTP_HEADER_FIELD_CONTENT_LENGTH, sizeof(FNET_HTTP_HEADER_FIELD_CONTENT_LENGTH)-1) == 0)
{
char *p;
char *length_str = &req_buf[sizeof(FNET_HTTP_HEADER_FIELD_CONTENT_LENGTH)-1];
session->request.content_length = (long)fnet_strtoul(length_str,&p,10);
}
#endif
}
}
/* Line is skiped.*/
else
session->request.skip_line = 0; /* Reset the Skip flag.*/
session->buffer_actual_size = 0; /* => Parse Next Header line.*/
}
#endif/* FNET_CFG_HTTP_VERSION_MAJOR */
}
/* Not whole line received yet.*/
else if (session->buffer_actual_size == FNET_HTTP_BUF_SIZE)
/* Buffer is full.*/
{
#if FNET_CFG_HTTP_VERSION_MAJOR /* HTTP/1.x*/
if(session->request.method != 0)
/* For header, skip the line.*/
{
/* Skip line.*/
session->request.skip_line = 1;
session->buffer_actual_size = 0;
}
else /* Error.*/
{
/* Default code = FNET_HTTP_STATUS_CODE_INTERNAL_SERVER_ERROR. */
session->buffer_actual_size = 0;
session->state = FNET_HTTP_STATE_TX; /* Send error.*/
}
#else /* HTTP/0.9 */
session->state = FNET_HTTP_STATE_CLOSING;
#endif
}
}
/* No data.*/
else if(fnet_timer_get_interval(session->state_time, fnet_timer_ticks()) /* Time out? */
> (FNET_HTTP_WAIT_RX_MS / FNET_TIMER_PERIOD_MS))
{
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
}
/* else => WAITING REQUEST. */
}
/* recv() error.*/
else
{
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
}
}
while ((res > 0) && (session->state == FNET_HTTP_STATE_RX_REQUEST)); /* Till receiving the request header.*/
break;
#if FNET_CFG_HTTP_POST
/*---- RX --------------------------------------------------*/
case FNET_HTTP_STATE_RX: /* Receive data (Entity-Body). */
if((res = recv(session->socket_foreign, &session->buffer[session->buffer_actual_size], (int)(FNET_HTTP_BUF_SIZE-session->buffer_actual_size), 0) )!= SOCKET_ERROR)
{
session->buffer_actual_size += res;
session->request.content_length -= res;
if(res > 0)
/* Some Data.*/
{
session->state_time = fnet_timer_ticks(); /* Reset timeout.*/
res = session->request.method->receive(http);
if(fnet_http_status_ok(res) != FNET_OK)
{
if(res != FNET_ERR)
session->response.status.code = (fnet_http_status_code_t)res;
else
session->response.status.code = FNET_HTTP_STATUS_CODE_INTERNAL_SERVER_ERROR;
session->request.content_length = 0;
}
if(session->request.content_length <= 0) /* The last data.*/
{
session->state = FNET_HTTP_STATE_TX; /* Send data.*/
}
session->buffer_actual_size = 0;
}
else
/* No Data.*/
{
if(fnet_timer_get_interval(session->state_time, fnet_timer_ticks())
> (FNET_HTTP_WAIT_RX_MS / FNET_TIMER_PERIOD_MS))
/* Time out.*/
{
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
}
}
}
else
/* Socket error.*/
{
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
}
break;
#endif /* FNET_CFG_HTTP_POST.*/
/*---- TX --------------------------------------------------*/
case FNET_HTTP_STATE_TX: /* Send data. */
if(fnet_timer_get_interval(session->state_time, fnet_timer_ticks())
< (FNET_HTTP_WAIT_TX_MS / FNET_TIMER_PERIOD_MS)) /* Check timeout */
{
int send_size;
if(session->buffer_actual_size == session->response.buffer_sent)
{
/* Reset counters.*/
session->buffer_actual_size =0;
session->response.buffer_sent = 0;
if(session->response.send_eof || session->response.tx_data(http) == FNET_ERR) /* get data for sending */
{
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
break;
}
}
send_size = (int)(session->buffer_actual_size - (int)session->response.buffer_sent);
if(send_size > http->send_max)
send_size = (int)http->send_max;
if((res = send(session->socket_foreign, session->buffer
+ session->response.buffer_sent, send_size, 0)) != SOCKET_ERROR)
{
if(res)
{
FNET_DEBUG_HTTP("HTTP: TX %d bytes.", res);
session->state_time = fnet_timer_ticks(); /* reset timeout */
session->response.buffer_sent += res;
}
break; /* => SENDING */
}
}
session->state = FNET_HTTP_STATE_CLOSING; /*=> CLOSING */
break;
/*---- CLOSING --------------------------------------------------*/
case FNET_HTTP_STATE_CLOSING:
if(session->request.method && session->request.method->close)
session->request.method->close(http);
closesocket(session->socket_foreign);
session->socket_foreign = SOCKET_INVALID;
session->state = FNET_HTTP_STATE_LISTENING; /*=> LISTENING */
break;
default:
break;
}
}
} /*for(sessions)*/
}
