smcp_status_t
smcp_curl_proxy_request_handler(
smcp_curl_proxy_node_t node
) {
smcp_status_t ret = SMCP_STATUS_NOT_ALLOWED;
smcp_curl_request_t request = NULL;
struct curl_slist *headerlist=NULL;
smcp_method_t method = smcp_inbound_get_code();
//require_action(method<=COAP_METHOD_DELETE,bail,ret = SMCP_STATUS_NOT_ALLOWED);
//require_action(COAP_OPTION_URI_PATH!=smcp_inbound_peek_option(NULL,NULL),bail,ret=SMCP_STATUS_NOT_FOUND);
node->interface = smcp_get_current_instance();
smcp_inbound_reset_next_option();
request = smcp_curl_request_create();
request->proxy_node = node;
require_action(request!=NULL,bail,ret = SMCP_STATUS_MALLOC_FAILURE);
switch(method) {
case COAP_METHOD_GET:
curl_easy_setopt(request->curl, CURLOPT_CUSTOMREQUEST, "GET");
break;
case COAP_METHOD_PUT:
curl_easy_setopt(request->curl, CURLOPT_PUT, 1L);
break;
case COAP_METHOD_POST:
curl_easy_setopt(request->curl, CURLOPT_POST, 1L);
break;
case COAP_METHOD_DELETE:
curl_easy_setopt(request->curl, CURLOPT_CUSTOMREQUEST, "DELETE");
break;
default:
ret = SMCP_STATUS_NOT_ALLOWED;
break;
}
{
coap_option_key_t key;
const uint8_t* value;
coap_size_t value_len;
while((key=smcp_inbound_next_option(&value, &value_len))!=COAP_OPTION_INVALID) {
if(key==COAP_OPTION_PROXY_URI) {
char uri[value_len+1];
memcpy(uri,value,value_len);
uri[value_len] = 0;
curl_easy_setopt(request->curl, CURLOPT_URL, uri);
assert_printf("CuRL URL: \"%s\"",uri);
ret = 0;
} else if(key==COAP_OPTION_URI_HOST) {
} else if(key==COAP_OPTION_URI_PORT) {
} else if(key==COAP_OPTION_URI_PATH) {
} else if(key==COAP_OPTION_URI_QUERY) {
} else if(key==COAP_OPTION_CONTENT_TYPE || key==COAP_OPTION_ACCEPT) {
const char* option_name = coap_option_key_to_cstr(key, false);
const char* value_string = coap_content_type_to_cstr(value[1]);
char header[strlen(option_name)+strlen(value_string)+3];
strcpy(header,option_name);
strcat(header,": ");
strcat(header,value_string);
headerlist = curl_slist_append(headerlist, header);
assert_printf("CuRL HEADER: \"%s\"",header);
} else {
if(coap_option_value_is_string(key)) {
const char* option_name = coap_option_key_to_cstr(key, false);
char header[strlen(option_name)+value_len+3];
strcpy(header,option_name);
strcat(header,": ");
strncat(header,(const char*)value,value_len);
assert_printf("CuRL HEADER: \"%s\"",header);
headerlist = curl_slist_append(headerlist, header);
}
}
}
}
require_noerr(ret,bail);
if(smcp_inbound_get_content_len()) {
coap_size_t len = smcp_inbound_get_content_len();
request->output_content = calloc(1,len+1);
request->output_content_len = len;
memcpy(request->output_content,smcp_inbound_get_content_ptr(),len);
curl_easy_setopt(request->curl, CURLOPT_READFUNCTION, ReadMemoryCallback);
curl_easy_setopt(request->curl, CURLOPT_READDATA, (void *)request);
}
curl_easy_setopt(request->curl, CURLOPT_USERAGENT, "smcp-curl-proxy/1.0");
curl_easy_setopt(request->curl, CURLOPT_HTTPHEADER, headerlist),headerlist=NULL;
curl_easy_setopt(request->curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(request->curl, CURLOPT_WRITEDATA, (void *)request);
ret = smcp_start_async_response(&request->async_response,0);
require_noerr(ret,bail);
if(node->curl_multi_handle)
curl_multi_add_handle(node->curl_multi_handle, request->curl);
else
curl_easy_perform(request->curl);
bail:
if(headerlist)
curl_slist_free_all(headerlist);
if(ret && request)
smcp_curl_request_release(request);
return ret;
}
smcp_status_t
smcp_variable_node_request_handler(
smcp_variable_node_t node
) {
// TODO: Make this function use less stack space!
smcp_method_t method = smcp_inbound_get_code();
smcp_status_t ret = SMCP_STATUS_NOT_FOUND;
coap_content_type_t content_type = smcp_inbound_get_content_type();
char* content_ptr = (char*)smcp_inbound_get_content_ptr();
size_t content_len = smcp_inbound_get_content_len();
SMCP_NON_RECURSIVE char buffer[SMCP_VARIABLE_MAX_VALUE_LENGTH+1];
SMCP_NON_RECURSIVE coap_content_type_t reply_content_type;
uint8_t key_index = BAD_KEY_INDEX;
size_t value_len;
bool needs_prefix = true;
char* prefix_name = "";
reply_content_type = SMCP_CONTENT_TYPE_APPLICATION_FORM_URLENCODED;
require(node, bail);
// Look up the key index.
if(smcp_inbound_peek_option(NULL,&value_len)==COAP_OPTION_URI_PATH) {
if(!value_len) {
needs_prefix = false;
smcp_inbound_next_option(NULL,NULL);
} else for(key_index=0;key_index<BAD_KEY_INDEX;key_index++) {
ret = node->func(node,SMCP_VAR_GET_KEY,key_index,buffer);
require_action(ret==0,bail,ret=SMCP_STATUS_NOT_FOUND);
if(smcp_inbound_option_strequal(COAP_OPTION_URI_PATH, buffer)) {
smcp_inbound_next_option(NULL,NULL);
break;
}
}
}
{
coap_option_key_t key;
const uint8_t* value;
while((key=smcp_inbound_next_option(&value, &value_len))!=COAP_OPTION_INVALID) {
require_action(key!=COAP_OPTION_URI_PATH,bail,ret=SMCP_STATUS_NOT_FOUND);
if(key==COAP_OPTION_URI_QUERY) {
if( method == COAP_METHOD_POST
&& value_len>=2
&& strhasprefix_const((const char*)value,"v=")
) {
DEBUG_PRINTF("variable-node: value is in the query.");
content_type = COAP_CONTENT_TYPE_TEXT_PLAIN;
content_ptr = (char*)value+2;
content_len = value_len-2;
}
// } else if(key==COAP_OPTION_ETAG) {
// } else if(key==COAP_OPTION_IF_MATCH) {
// } else if(key==COAP_OPTION_IF_NONE_MATCH) {
} else if(key==COAP_OPTION_ACCEPT) {
reply_content_type = 0;
if(value_len==1)
reply_content_type = value[0];
else {
// Unsupported type.
}
} else if(COAP_OPTION_IS_CRITICAL(key)) {
ret=SMCP_STATUS_BAD_OPTION;
assert_printf("Unrecognized option %d, \"%s\"",
key,
coap_option_key_to_cstr(key, false)
);
goto bail;
}
}
}
// TODO: Implement me!
if(method == COAP_METHOD_PUT)
method = COAP_METHOD_POST;
if(method == COAP_METHOD_POST) {
require_action(!smcp_inbound_is_dupe(),bail,ret=0);
require_action(
key_index!=BAD_KEY_INDEX,
bail,
ret=SMCP_STATUS_NOT_ALLOWED
);
if(content_type==SMCP_CONTENT_TYPE_APPLICATION_FORM_URLENCODED) {
char* key = NULL;
char* value = NULL;
content_len = 0;
while(
url_form_next_value(
(char**)&content_ptr,
&key,
&value
)
&& key
&& value
) {
if(strequal_const(key, "v")) {
content_ptr = value;
content_len = strlen(value);
break;
}
}
}
// Make sure our content is zero terminated.
((char*)content_ptr)[content_len] = 0;
ret = node->func(node,SMCP_VAR_SET_VALUE,key_index,(char*)content_ptr);
require_noerr(ret,bail);
ret = smcp_outbound_begin_response(COAP_RESULT_204_CHANGED);
require_noerr(ret,bail);
ret = smcp_outbound_send();
require_noerr(ret,bail);
} else if(method == COAP_METHOD_GET) {
if(key_index==BAD_KEY_INDEX) {
char* content_end_ptr;
ret = smcp_outbound_begin_response(COAP_RESULT_205_CONTENT);
require_noerr(ret,bail);
smcp_outbound_add_option_uint(COAP_OPTION_CONTENT_TYPE, COAP_CONTENT_TYPE_APPLICATION_LINK_FORMAT);
ret = smcp_observable_update(&node->observable, SMCP_OBSERVABLE_BROADCAST_KEY);
check_string(ret==0,smcp_status_to_cstr(ret));
content_ptr = smcp_outbound_get_content_ptr(&content_len);
content_end_ptr = content_ptr+content_len;
for(key_index=0;key_index<BAD_KEY_INDEX;key_index++) {
ret = node->func(node,SMCP_VAR_GET_KEY,key_index,buffer);
if(ret) break;
if(content_ptr+2>=content_end_ptr) {
// No more room for content.
break;
}
*content_ptr++ = '<';
if(needs_prefix) {
content_ptr += url_encode_cstr(content_ptr, prefix_name, (content_end_ptr-content_ptr)-1);
content_ptr = stpncpy(content_ptr,"/",(content_end_ptr-content_ptr)-1);
}
content_ptr += url_encode_cstr(content_ptr, buffer, (content_end_ptr-content_ptr)-1);
*content_ptr++ = '>';
ret = node->func(node,SMCP_VAR_GET_VALUE,key_index,buffer);
if(content_ptr+4>=content_end_ptr) {
// No more room for content.
break;
}
if(!ret) {
strcpy(content_ptr,";v=");
content_ptr += 3;
content_ptr += quoted_cstr(content_ptr, buffer, (content_end_ptr-content_ptr)-1);
}
ret = node->func(node,SMCP_VAR_GET_LF_TITLE,key_index,buffer);
if(content_ptr+8>=content_end_ptr) {
// No more room for content.
break;
}
if(!ret) {
strcpy(content_ptr,";title=");
content_ptr += 7;
content_ptr += quoted_cstr(content_ptr, buffer, (content_end_ptr-content_ptr)-1);
}
// Observation flag
if(0==node->func(node,SMCP_VAR_GET_OBSERVABLE,key_index,NULL))
content_ptr = stpncpy(content_ptr,";obs",(content_end_ptr-content_ptr)-1);
*content_ptr++ = ',';
}
ret = smcp_outbound_set_content_len(content_len-(content_end_ptr-content_ptr));
require_noerr(ret,bail);
ret = smcp_outbound_send();
} else {
size_t replyContentLength = 0;
char *replyContent;
ret = smcp_outbound_begin_response(COAP_RESULT_205_CONTENT);
require_noerr(ret,bail);
if(0==node->func(node,SMCP_VAR_GET_OBSERVABLE,key_index,buffer)) {
ret = smcp_observable_update(&node->observable, key_index);
check_string(ret==0,smcp_status_to_cstr(ret));
}
if(reply_content_type == SMCP_CONTENT_TYPE_APPLICATION_FORM_URLENCODED) {
uint32_t etag;
if(0==node->func(node,SMCP_VAR_GET_MAX_AGE,key_index,buffer)) {
#if HAVE_STRTOL
uint32_t max_age = strtol(buffer,NULL,0)&0xFFFFFF;
#else
uint32_t max_age = atoi(buffer)&0xFFFFFF;
#endif
smcp_outbound_add_option_uint(COAP_OPTION_MAX_AGE, max_age);
}
ret = node->func(node,SMCP_VAR_GET_VALUE,key_index,buffer);
require_noerr(ret,bail);
fasthash_start(0);
fasthash_feed((const uint8_t*)buffer,strlen(buffer));
etag = fasthash_finish_uint32();
smcp_outbound_add_option_uint(COAP_OPTION_CONTENT_TYPE, SMCP_CONTENT_TYPE_APPLICATION_FORM_URLENCODED);
smcp_outbound_add_option_uint(COAP_OPTION_ETAG, etag);
replyContent = smcp_outbound_get_content_ptr(&replyContentLength);
*replyContent++ = 'v';
*replyContent++ = '=';
replyContentLength -= 2;
replyContentLength = url_encode_cstr(
replyContent,
buffer,
replyContentLength
);
ret = smcp_outbound_set_content_len(replyContentLength+2);
} else {
ret = node->func(node,SMCP_VAR_GET_VALUE,key_index,buffer);
require_noerr(ret,bail);
ret = smcp_outbound_append_content(buffer, SMCP_CSTR_LEN);
}
require_noerr(ret,bail);
ret = smcp_outbound_send();
}
} else {
ret = smcp_default_request_handler(
(void*)node
);
check_string(ret == SMCP_STATUS_OK, smcp_status_to_cstr(ret));
}
bail:
check_string(ret == SMCP_STATUS_OK, smcp_status_to_cstr(ret));
return ret;
}
smcp_status_t
cgi_node_request_handler(
cgi_node_t node
) {
smcp_status_t ret = 0;
cgi_node_request_t request = NULL;
uint32_t block2_option = BLOCK_OPTION_DEFAULT;
uint32_t block1_option = BLOCK_OPTION_UNSPECIFIED;
smcp_method_t method = smcp_inbound_get_code();
require(node,bail);
node->interface = smcp_get_current_instance();
if (method==COAP_METHOD_GET) {
ret = 0;
}
require_noerr(ret,bail);
{
const uint8_t* value;
coap_size_t value_len;
coap_option_key_t key;
while ((key=smcp_inbound_next_option(&value, &value_len))!=COAP_OPTION_INVALID) {
if (key == COAP_OPTION_BLOCK2) {
uint8_t i;
block2_option = 0;
for (i = 0; i < value_len; i++) {
block2_option = (block2_option << 8) + value[i];
}
}
if (key == COAP_OPTION_BLOCK1) {
uint8_t i;
block1_option = 0;
for (i = 0; i < value_len; i++) {
block1_option = (block1_option << 8) + value[i];
}
}
}
}
// Make sure this is a supported method.
switch (method) {
case COAP_METHOD_GET:
case COAP_METHOD_PUT:
case COAP_METHOD_POST:
case COAP_METHOD_DELETE:
break;
default:
ret = SMCP_STATUS_NOT_IMPLEMENTED;
goto bail;
break;
}
request = cgi_node_get_associated_request(node);
if (request == NULL) {
// Possibly new request.
// Assume new for now, but we may need to do additional checks.
// We don't support non-zero block indexes on the first packet.
require_action((block2_option>>4) == 0, bail, ret = SMCP_STATUS_INVALID_ARGUMENT);
request = cgi_node_create_request(node);
require_action(request != NULL, bail, ret = SMCP_STATUS_FAILURE);
request->block2 = block2_option;
}
