void my_free(void *ptr)
{
header_t *header;
if (ptr)
{
header = (header_t *)((UINTPTR_T)ptr - sizeof (header_t));
add_to_list(header, header->list);
merge_headers(header->list);
release_pages(header->list);
}
}
char *
passenger_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
passenger_loc_conf_t *prev = parent;
passenger_loc_conf_t *conf = child;
ngx_http_core_loc_conf_t *clcf;
size_t size;
ngx_hash_init_t hash;
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
if (generated_merge_part(conf, prev, cf) == 0) {
return NGX_CONF_ERROR;
}
if (prev->options_cache.data == NULL) {
if (cache_loc_conf_options(cf, prev) != NGX_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"cannot create " PROGRAM_NAME " configuration cache");
return NGX_CONF_ERROR;
}
}
/******************************/
/******************************/
#if (NGX_HTTP_CACHE) && NGINX_VERSION_NUM >= 1007009
if (conf->upstream_config.store > 0) {
conf->upstream_config.cache = 0;
}
if (conf->upstream_config.cache > 0) {
conf->upstream_config.store = 0;
}
#endif
#if NGINX_VERSION_NUM >= 1007009
if (conf->upstream_config.store == NGX_CONF_UNSET) {
ngx_conf_merge_value(conf->upstream_config.store,
prev->upstream_config.store, 0);
conf->upstream_config.store_lengths = prev->upstream_config.store_lengths;
conf->upstream_config.store_values = prev->upstream_config.store_values;
}
#else
if (conf->upstream_config.store != 0) {
ngx_conf_merge_value(conf->upstream_config.store,
prev->upstream_config.store, 0);
if (conf->upstream_config.store_lengths == NULL) {
conf->upstream_config.store_lengths = prev->upstream_config.store_lengths;
conf->upstream_config.store_values = prev->upstream_config.store_values;
}
}
#endif
ngx_conf_merge_uint_value(conf->upstream_config.store_access,
prev->upstream_config.store_access, 0600);
#if NGINX_VERSION_NUM >= 1007005
ngx_conf_merge_uint_value(conf->upstream_config.next_upstream_tries,
prev->upstream_config.next_upstream_tries, 0);
#endif
ngx_conf_merge_value(conf->upstream_config.buffering,
prev->upstream_config.buffering, 0);
ngx_conf_merge_value(conf->upstream_config.ignore_client_abort,
prev->upstream_config.ignore_client_abort, 0);
#if NGINX_VERSION_NUM >= 1007007
ngx_conf_merge_value(conf->upstream_config.force_ranges,
prev->upstream_config.force_ranges, 0);
#endif
ngx_conf_merge_ptr_value(conf->upstream_config.local,
prev->upstream_config.local, NULL);
ngx_conf_merge_msec_value(conf->upstream_config.connect_timeout,
prev->upstream_config.connect_timeout, 12000000);
ngx_conf_merge_msec_value(conf->upstream_config.send_timeout,
prev->upstream_config.send_timeout, 12000000);
ngx_conf_merge_msec_value(conf->upstream_config.read_timeout,
prev->upstream_config.read_timeout, 12000000);
#if NGINX_VERSION_NUM >= 1007005
ngx_conf_merge_msec_value(conf->upstream_config.next_upstream_timeout,
prev->upstream_config.next_upstream_timeout, 0);
#endif
ngx_conf_merge_size_value(conf->upstream_config.send_lowat,
prev->upstream_config.send_lowat, 0);
ngx_conf_merge_size_value(conf->upstream_config.buffer_size,
prev->upstream_config.buffer_size,
16 * 1024);
#if NGINX_VERSION_NUM >= 1007007
ngx_conf_merge_size_value(conf->upstream_config.limit_rate,
prev->upstream_config.limit_rate, 0);
#endif
ngx_conf_merge_bufs_value(conf->upstream_config.bufs, prev->upstream_config.bufs,
8, 16 * 1024);
if (conf->upstream_config.bufs.num < 2) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"there must be at least 2 \"passenger_buffers\"");
return NGX_CONF_ERROR;
}
size = conf->upstream_config.buffer_size;
if (size < conf->upstream_config.bufs.size) {
size = conf->upstream_config.bufs.size;
}
ngx_conf_merge_size_value(conf->upstream_config.busy_buffers_size_conf,
prev->upstream_config.busy_buffers_size_conf,
NGX_CONF_UNSET_SIZE);
if (conf->upstream_config.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
conf->upstream_config.busy_buffers_size = 2 * size;
} else {
conf->upstream_config.busy_buffers_size =
conf->upstream_config.busy_buffers_size_conf;
}
if (conf->upstream_config.busy_buffers_size < size) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"passenger_busy_buffers_size\" must be equal to or greater "
"than the maximum of the value of \"passenger_buffer_size\" and "
"one of the \"passenger_buffers\"");
return NGX_CONF_ERROR;
}
if (conf->upstream_config.busy_buffers_size
> (conf->upstream_config.bufs.num - 1) * conf->upstream_config.bufs.size)
{
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"passenger_busy_buffers_size\" must be less than "
"the size of all \"passenger_buffers\" minus one buffer");
return NGX_CONF_ERROR;
}
ngx_conf_merge_size_value(conf->upstream_config.temp_file_write_size_conf,
prev->upstream_config.temp_file_write_size_conf,
NGX_CONF_UNSET_SIZE);
if (conf->upstream_config.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
conf->upstream_config.temp_file_write_size = 2 * size;
} else {
conf->upstream_config.temp_file_write_size =
conf->upstream_config.temp_file_write_size_conf;
}
if (conf->upstream_config.temp_file_write_size < size) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"passenger_temp_file_write_size\" must be equal to or greater than "
"the maximum of the value of \"passenger_buffer_size\" and "
"one of the \"passenger_buffers\"");
return NGX_CONF_ERROR;
}
ngx_conf_merge_size_value(conf->upstream_config.max_temp_file_size_conf,
prev->upstream_config.max_temp_file_size_conf,
NGX_CONF_UNSET_SIZE);
if (conf->upstream_config.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
conf->upstream_config.max_temp_file_size = 1024 * 1024 * 1024;
} else {
conf->upstream_config.max_temp_file_size =
conf->upstream_config.max_temp_file_size_conf;
}
if (conf->upstream_config.max_temp_file_size != 0
&& conf->upstream_config.max_temp_file_size < size)
{
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"passenger_max_temp_file_size\" must be equal to zero to disable "
"temporary files usage or must be equal to or greater than "
"the maximum of the value of \"passenger_buffer_size\" and "
"one of the \"passenger_buffers\"");
return NGX_CONF_ERROR;
}
ngx_conf_merge_bitmask_value(conf->upstream_config.ignore_headers,
prev->upstream_config.ignore_headers,
NGX_CONF_BITMASK_SET);
ngx_conf_merge_bitmask_value(conf->upstream_config.next_upstream,
prev->upstream_config.next_upstream,
(NGX_CONF_BITMASK_SET
|NGX_HTTP_UPSTREAM_FT_ERROR
|NGX_HTTP_UPSTREAM_FT_TIMEOUT));
if (conf->upstream_config.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
conf->upstream_config.next_upstream = NGX_CONF_BITMASK_SET
|NGX_HTTP_UPSTREAM_FT_OFF;
}
ngx_conf_merge_path_value(cf,
&conf->upstream_config.temp_path,
prev->upstream_config.temp_path,
&ngx_http_proxy_temp_path);
#if (NGX_HTTP_CACHE)
#if NGINX_VERSION_NUM >= 1007009
if (conf->upstream_config.cache == NGX_CONF_UNSET) {
ngx_conf_merge_value(conf->upstream_config.cache,
prev->upstream_config.cache, 0);
conf->upstream_config.cache_zone = prev->upstream_config.cache_zone;
conf->upstream_config.cache_value = prev->upstream_config.cache_value;
}
if (conf->upstream_config.cache_zone && conf->upstream_config.cache_zone->data == NULL) {
ngx_shm_zone_t *shm_zone;
shm_zone = conf->upstream_config.cache_zone;
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"scgi_cache\" zone \"%V\" is unknown",
&shm_zone->shm.name);
return NGX_CONF_ERROR;
}
#else
ngx_conf_merge_ptr_value(conf->upstream_config.cache,
prev->upstream_config.cache, NULL);
if (conf->upstream_config.cache && conf->upstream_config.cache->data == NULL) {
ngx_shm_zone_t *shm_zone;
shm_zone = conf->upstream_config.cache;
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"scgi_cache\" zone \"%V\" is unknown",
&shm_zone->shm.name);
return NGX_CONF_ERROR;
}
#endif
ngx_conf_merge_uint_value(conf->upstream_config.cache_min_uses,
prev->upstream_config.cache_min_uses, 1);
ngx_conf_merge_bitmask_value(conf->upstream_config.cache_use_stale,
prev->upstream_config.cache_use_stale,
(NGX_CONF_BITMASK_SET
| NGX_HTTP_UPSTREAM_FT_OFF));
if (conf->upstream_config.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
conf->upstream_config.cache_use_stale = NGX_CONF_BITMASK_SET
| NGX_HTTP_UPSTREAM_FT_OFF;
}
if (conf->upstream_config.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
conf->upstream_config.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
}
if (conf->upstream_config.cache_methods == 0) {
conf->upstream_config.cache_methods = prev->upstream_config.cache_methods;
}
conf->upstream_config.cache_methods |= NGX_HTTP_GET | NGX_HTTP_HEAD;
ngx_conf_merge_ptr_value(conf->upstream_config.cache_bypass,
prev->upstream_config.cache_bypass, NULL);
ngx_conf_merge_ptr_value(conf->upstream_config.no_cache,
prev->upstream_config.no_cache, NULL);
ngx_conf_merge_ptr_value(conf->upstream_config.cache_valid,
prev->upstream_config.cache_valid, NULL);
if (conf->cache_key.value.data == NULL) {
conf->cache_key = prev->cache_key;
}
ngx_conf_merge_value(conf->upstream_config.cache_lock,
prev->upstream_config.cache_lock, 0);
ngx_conf_merge_msec_value(conf->upstream_config.cache_lock_timeout,
prev->upstream_config.cache_lock_timeout, 5000);
ngx_conf_merge_value(conf->upstream_config.cache_revalidate,
prev->upstream_config.cache_revalidate, 0);
#if NGINX_VERSION_NUM >= 1007008
ngx_conf_merge_msec_value(conf->upstream_config.cache_lock_age,
prev->upstream_config.cache_lock_age, 5000);
#endif
#if NGINX_VERSION_NUM >= 1006000
ngx_conf_merge_value(conf->upstream_config.cache_revalidate,
prev->upstream_config.cache_revalidate, 0);
#endif
#endif
ngx_conf_merge_value(conf->upstream_config.pass_request_headers,
prev->upstream_config.pass_request_headers, 1);
ngx_conf_merge_value(conf->upstream_config.pass_request_body,
prev->upstream_config.pass_request_body, 1);
ngx_conf_merge_value(conf->upstream_config.intercept_errors,
prev->upstream_config.intercept_errors, 0);
hash.max_size = 512;
hash.bucket_size = ngx_align(64, ngx_cacheline_size);
hash.name = "passenger_hide_headers_hash";
if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream_config,
&prev->upstream_config, headers_to_hide, &hash)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
if (conf->upstream_config.upstream == NULL) {
conf->upstream_config.upstream = prev->upstream_config.upstream;
}
if (conf->enabled == 1 /* and not NGX_CONF_UNSET */
&& passenger_main_conf.root_dir.len != 0
&& clcf->handler == NULL /* no handler set by other modules */)
{
clcf->handler = passenger_content_handler;
}
conf->headers_hash_bucket_size = ngx_align(conf->headers_hash_bucket_size,
ngx_cacheline_size);
hash.max_size = conf->headers_hash_max_size;
hash.bucket_size = conf->headers_hash_bucket_size;
hash.name = "passenger_headers_hash";
if (merge_headers(cf, conf, prev) != NGX_OK) {
return NGX_CONF_ERROR;
}
if (cache_loc_conf_options(cf, conf) != NGX_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"cannot create " PROGRAM_NAME " configuration cache");
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
/* sends a miniroute packet, automatically discovering the path if necessary. See description in the
* .h file.
*/
int miniroute_send_pkt(network_address_t dest_address, int hdr_len, char* hdr, int data_len, char* data)
{
// This will store the route request struct, which is a structure related to the
// search for a path to the host
route_request_t route_request;
// Store the routing header
routing_header_t routing_header;
// Store the route to the host, which is an array of addresses
network_address_t* route;
// Store the route data struct, which holds the route and some metadata
route_data_t route_data;
// Store my address
network_address_t my_addr;
// Used to synchronize access with structures the network handler touches
interrupt_level_t prev_level;
// This will store the combined routing + normal headers
char* full_header;
network_address_t dest_address2;
// These will store data related to the routes
int time_route_found;
int route_len;
int route_valid = 1;
// Used to get data from the header containing the paht
routing_header_t tmp_routing_header;
// Used to just check the IP of senders; combats UDP port issues w/ simulated broadcasts
unsigned int dest_address_ip = dest_address[0];
// Loop + tmp variables
int current_req_id;
int success = 0;
int alarm_id;
int x;
int i;
if (hdr_len == 0 || hdr == NULL
|| data_len == 0 || data == NULL)
return -1;
// Get the route item, which is a hashmap_item_t, from the hashmap for this addr
semaphore_P(route_cache_sem);
route_data = (route_data_t) hashmap_get(route_cache, hash_address(dest_address));
// If it's not NULL, extract the data from the item
if (route_data != NULL)
{
time_route_found = route_data->time_found;
route_len = route_data->route_len;
// caveat: the cleanup thread may delete the route data, so we need to
// save it in a separate variable, just incase.
route = (network_address_t*) malloc(sizeof(network_address_t) * route_len);
if (route == NULL)
{
semaphore_V(route_cache_sem);
return -1;
}
memcpy(route, route_data->route, sizeof(network_address_t) * route_len);
}
else
{
route_valid = 0;
}
semaphore_V(route_cache_sem);
// Check, if the route isn't NULL, if it's expired
if (route_valid == 1 && (ticks - time_route_found) * PERIOD/MILLISECOND > 3000)
{
route_valid = 0;
}
// If the route is invalid (either not in the cache or expired)...
if (route_valid == 0)
{
// We won't be needing that previous route variable
if (route_data != NULL)
{
// But, just in case someone is still using it, use the route cache semaphore
semaphore_P(route_cache_sem);
free(route);
semaphore_V(route_cache_sem);
}
// Check if someone else already initiated this route discovery request
prev_level = set_interrupt_level(DISABLED);
route_request = (route_request_t) hashmap_get(current_discovery_requests, dest_address_ip);
set_interrupt_level(prev_level);
// If so, we can just wait for their result
if (route_request != NULL)
{
// Wait for the other thread to get the path
// The threads waiting variable needs to be synchronized. We decided
// to reuse the route cache sem, as there will not be much lock
// contention
semaphore_P(route_cache_sem);
route_request->threads_waiting++;
semaphore_V(route_cache_sem);
semaphore_P(route_request->waiting_sem);
// Get the route from the hashmap
semaphore_P(route_cache_sem);
route_data = (route_data_t) hashmap_get(route_cache, hash_address(dest_address));
// If the other thread didn't get the route, return an error
if (route_data == NULL)
{
// Return failure...
semaphore_V(route_cache_sem);
return -1;
}
else
{
time_route_found = route_data->time_found;
route_len = route_data->route_len;
if ((ticks - time_route_found) * PERIOD/MILLISECOND > 3000)
{
// This could have been a left-over expired cache entry that we haven't
// deleted yet.
semaphore_V(route_cache_sem);
return -1;
}
// Save the route in a separate variable in case the route gets cleaned up
// while we're using it
route = (network_address_t*) malloc(sizeof(network_address_t) * route_len);
if (route == NULL)
{
semaphore_V(route_cache_sem);
return -1;
}
memcpy(route, route_data->route, sizeof(network_address_t) * route_len);
semaphore_V(route_cache_sem);
}
}
else
{
// Otherwise, we have to do the route discovery process
// Create a new route request struct
route_request = create_route_request();
if (route_request == NULL)
{
return -1;
}
// Add the route request to the current discovery requests
prev_level = set_interrupt_level(DISABLED);
hashmap_insert(current_discovery_requests, dest_address_ip, route_request);
set_interrupt_level(prev_level);
// We'll try the route discovery process three times
for (i = 0; i < 3; i++)
{
// Register an alarm to wake this thread up as it waits for a response
alarm_id = register_alarm(12000, &alarm_wakeup_sem, (void*) route_request->initiator_sem);
// Increment the request ID - must be synchronized, obviously
semaphore_P(request_id_sem);
current_req_id = route_request_id++;
semaphore_V(request_id_sem);
// We need to make a header for the discovery request, but the path
// needs to have our address in it, so the reply can be forwarded back
// to us
network_get_my_address(my_addr);
// Passing in the address of this local variable will suffice, as the
// value is immediately copied into the header and then not used again
// Create a routing header for the route discovery request
routing_header = create_miniroute_header(ROUTING_ROUTE_DISCOVERY,
dest_address, current_req_id,
MAX_ROUTE_LENGTH, 1,
&my_addr);
if (routing_header == NULL)
{
return -1;
}
// Combine it with the given header
full_header = merge_headers(routing_header, hdr, hdr_len);
if (full_header == NULL)
{
free(routing_header);
return -1;
}
// Send out the route discovery request
network_bcast_pkt(sizeof(struct routing_header)+hdr_len,
(char*) full_header, data_len, data);
// Wait for a reply (which will be signalled by the network handler)
prev_level = set_interrupt_level(DISABLED);
semaphore_P(route_request->initiator_sem);
set_interrupt_level(prev_level);
// Check if we got a successful response
if (route_request->interrupt_arg != NULL)
{
// Deregister the alarm before it tries to wake us up
// Needs to be synchronized, as the IH touches it and we destroy it here
prev_level = set_interrupt_level(alarm_id);
deregister_alarm(alarm_id);
set_interrupt_level(alarm_id);
// Get the header
tmp_routing_header = (routing_header_t) route_request->interrupt_arg->buffer;
route_len = unpack_unsigned_int(tmp_routing_header->path_len);
// Then the path, for our own use later in this function
// We'll also create one copy and put it in the route data struct
route = miniroute_reverse_raw_path(tmp_routing_header, route_len);
if (route == NULL)
{
free(routing_header);
free(full_header);
return -1;
}
// Create a route data struct - with a different route (as it will be deleted by a diff thread)
route_data = create_route_data(miniroute_reverse_raw_path(tmp_routing_header, route_len),
route_len, ticks);
if (route_data == NULL)
{
free(routing_header);
free(full_header);
return -1;
}
// add it to the cache hashmap
semaphore_P(route_cache_sem);
hashmap_insert(route_cache, hash_address(dest_address), route_data);
semaphore_V(route_cache_sem);
// Wake up the other threads waiting
for (x = 0; x < route_request->threads_waiting; x++)
{
semaphore_V(route_request->waiting_sem);
}
// Clean up the route request struct, then delete it from the hashmap
// DELETE ROUTE REQUEST WILL FREE THE NETWORK INTERRUPT ARG!
prev_level = set_interrupt_level(DISABLED);
delete_route_request(route_request);
hashmap_delete(current_discovery_requests, dest_address_ip);
set_interrupt_level(prev_level);
// We don't need to actually get any of the routing stuff from the
// route_ite, as this process also sent the data packet
// Free the headers
free(routing_header);
free(full_header);
// Return the total bytes sent, not including the routing header
success = 1;
break;
}
}
// If we didn't get a successful response after 3 tries...
if (success == 0)
{
// Wake up the other threads waiting so they can see we failed
for (x = 0; x < route_request->threads_waiting; x++)
{
semaphore_V(route_request->waiting_sem);
}
// clean up the route request struct, then delete it from the hashmap
prev_level = set_interrupt_level(DISABLED);
delete_route_request(route_request);
hashmap_delete(current_discovery_requests, dest_address_ip);
set_interrupt_level(prev_level);
// Free the headers
free(routing_header);
free(full_header);
// Return failure...
return -1;
}
}
}
// If we're here, we either found the route in the cache or waited for another
// thread to finish getting the route (and it did so successfully)
network_address_copy(route[route_len-1], dest_address2);
// Need to update the dst address to deal with UDP port issues
// This again is due to UDP port issues...
pack_address(((mini_header_t) hdr)->destination_address, dest_address2);
// Create a routing header for the data packet
routing_header = create_miniroute_header(ROUTING_DATA,
dest_address2, 0,
MAX_ROUTE_LENGTH, route_len,
route);
if (routing_header == NULL)
{
return -1;
}
// Combine it with the given header
full_header = merge_headers(routing_header, hdr, hdr_len);
if (full_header == NULL)
{
free(routing_header);
}
// Set the right destination address
network_address_copy(route[1], dest_address2);
// Send the packet
network_send_pkt(dest_address2, sizeof(struct routing_header) + hdr_len,
full_header, data_len, data);
// Free the route + headers
free(route);
free(routing_header);
free(full_header);
// Return the total data sent
return hdr_len + data_len;
}
