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/* redsocks - transparent TCP-to-proxy redirector
* Copyright (C) 2007-2011 Leonid Evdokimov <leon@darkk.net.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
#include "parser.h"
#include "main.h"
#include "log.h"
#include "utils.h"
#include <event2/http.h>
#include <event2/buffer.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
typedef struct debug_instance_t {
int configured;
char* http_ip;
uint16_t http_port;
struct evhttp* http_server;
} debug_instance;
static debug_instance instance = {
.configured = 0,
};
static parser_entry debug_entries[] =
{
{ .key = "http_ip", .type = pt_pchar },
{ .key = "http_port", .type = pt_uint16 },
{ }
};
static int debug_onenter(parser_section *section)
{
if (instance.configured) {
parser_error(section->context, "only one instance of debug is valid");
return -1;
}
memset(&instance, 0, sizeof(instance));
for (parser_entry *entry = §ion->entries[0]; entry->key; entry++)
entry->addr =
(strcmp(entry->key, "http_ip") == 0) ? (void*)&instance.http_ip:
(strcmp(entry->key, "http_port") == 0) ? (void*)&instance.http_port :
NULL;
return 0;
}
static int debug_onexit(parser_section *section)
{
instance.configured = 1;
if (!instance.http_ip)
instance.http_ip = strdup("localhost");
return 0;
}
static parser_section debug_conf_section =
{
.name = "debug",
.entries = debug_entries,
.onenter = debug_onenter,
.onexit = debug_onexit,
};
static void debug_pipe(struct evhttp_request *req, void *arg)
{
UNUSED(arg);
int fds[2];
int code = (pipe(fds) == 0) ? HTTP_OK : HTTP_SERVUNAVAIL;
evhttp_send_reply(req, code, NULL, NULL);
}
static void debug_meminfo_json(struct evhttp_request *req, void *arg)
{
UNUSED(arg);
struct evbuffer* body = evbuffer_new();
evbuffer_add(body, "{", 1);
FILE* fd = fopen("/proc/vmstat", "r");
while (!feof(fd)) {
char buf[64];
size_t pages;
if (fscanf(fd, "%63s %zu", buf, &pages) == 2 && strncmp(buf, "nr_", 3) == 0) {
evbuffer_add_printf(body, "\"%s\": %zu, ", buf, pages);
}
for (int c = 0; c != EOF && c != '\n'; c = fgetc(fd))
;
}
fclose(fd);
size_t vmsize, rss, share, text, z, data;
fd = fopen("/proc/self/statm", "r");
if (fscanf(fd, "%zu %zu %zu %zu %zu %zu %zu", &vmsize, &rss, &share, &text, &z, &data, &z) == 7) {
evbuffer_add_printf(body,
"\"vmsize\": %zu, \"vmrss\": %zu, \"share\": %zu, \"text\": %zu, \"data\": %zu, ",
vmsize, rss, share, text, data);
}
fclose(fd);
evbuffer_add_printf(body, "\"getpagesize\": %d}", getpagesize());
evhttp_send_reply(req, HTTP_OK, NULL, body);
evbuffer_free(body);
}
static int debug_fini();
static int debug_init(struct event_base* evbase)
{
if (!instance.http_port)
return 0;
instance.http_server = evhttp_new(evbase);
if (!instance.http_server) {
log_errno(LOG_ERR, "evhttp_new()");
goto fail;
}
if (evhttp_bind_socket(instance.http_server, instance.http_ip, instance.http_port) != 0) {
log_errno(LOG_ERR, "evhttp_bind_socket()");
goto fail;
}
if (evhttp_set_cb(instance.http_server, "/debug/pipe", debug_pipe, NULL) != 0) {
log_errno(LOG_ERR, "evhttp_set_cb()");
goto fail;
}
if (evhttp_set_cb(instance.http_server, "/debug/meminfo.json", debug_meminfo_json, NULL) != 0) {
log_errno(LOG_ERR, "evhttp_set_cb()");
goto fail;
}
return 0;
fail:
debug_fini();
return -1;
}
static int debug_fini()
{
if (instance.http_server) {
evhttp_free(instance.http_server);
instance.http_server = 0;
}
free(instance.http_ip);
memset(&instance, 0, sizeof(instance));
return 0;
}
app_subsys debug_subsys =
{
.init = debug_init,
.fini = debug_fini,
.conf_section = &debug_conf_section,
};
/* vim:set tabstop=4 softtabstop=4 shiftwidth=4: */
/* vim:set foldmethod=marker foldlevel=32 foldmarker={,}: */
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