mirror of
http://git.haproxy.org/git/haproxy.git/
synced 2024-12-25 06:02:08 +00:00
b2551057af
This patch fixes all the leftovers from the include cleanup campaign. There were not that many (~400 entries in ~150 files) but it was definitely worth doing it as it revealed a few duplicates.
1923 lines
49 KiB
C
1923 lines
49 KiB
C
/*
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* Modsecurity wrapper for haproxy
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*
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* This file contains the bootstrap for launching and scheduling modsecurity
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* for working with HAProxy SPOE protocol.
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*
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* Copyright 2016 OZON, Thierry Fournier <thierry.fournier@ozon.io>
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*
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* This file is inherited from "A Random IP reputation service acting as a Stream
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* Processing Offload Agent"
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*
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* Copyright 2016 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <err.h>
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#include <ctype.h>
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#include <pthread.h>
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#include <event2/util.h>
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#include <event2/event.h>
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#include <event2/event_struct.h>
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#include <event2/thread.h>
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#include <haproxy/chunk.h>
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#include <haproxy/list.h>
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#include <haproxy/spoe.h>
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#include "spoa.h"
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#include "modsec_wrapper.h"
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#define DEFAULT_PORT 12345
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#define CONNECTION_BACKLOG 10
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#define NUM_WORKERS 10
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#define MAX_FRAME_SIZE 16384
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#define SPOP_VERSION "2.0"
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#define SLEN(str) (sizeof(str)-1)
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#define DEBUG(x...) \
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do { \
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if (debug) \
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LOG(x); \
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} while (0)
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enum spoa_state {
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SPOA_ST_CONNECTING = 0,
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SPOA_ST_PROCESSING,
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SPOA_ST_DISCONNECTING,
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};
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enum spoa_frame_type {
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SPOA_FRM_T_UNKNOWN = 0,
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SPOA_FRM_T_HAPROXY,
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SPOA_FRM_T_AGENT,
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};
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struct spoe_engine {
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char *id;
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struct list processing_frames;
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struct list outgoing_frames;
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struct list clients;
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struct list list;
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};
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struct spoe_frame {
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enum spoa_frame_type type;
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char *buf;
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unsigned int offset;
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unsigned int len;
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unsigned int stream_id;
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unsigned int frame_id;
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unsigned int flags;
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bool hcheck; /* true is the CONNECT frame is a healthcheck */
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bool fragmented; /* true if the frame is fragmented */
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int modsec_code; /* modsecurity return code. -1 if unset, 0 if none, other it returns http code. */
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struct event process_frame_event;
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struct worker *worker;
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struct spoe_engine *engine;
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struct client *client;
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struct list list;
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char *frag_buf; /* used to accumulate payload of a fragmented frame */
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unsigned int frag_len;
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char data[0];
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};
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struct client {
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int fd;
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unsigned long id;
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enum spoa_state state;
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struct event read_frame_event;
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struct event write_frame_event;
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struct spoe_frame *incoming_frame;
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struct spoe_frame *outgoing_frame;
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struct list processing_frames;
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struct list outgoing_frames;
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unsigned int max_frame_size;
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int status_code;
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char *engine_id;
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struct spoe_engine *engine;
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bool pipelining;
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bool async;
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bool fragmentation;
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struct worker *worker;
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struct list by_worker;
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struct list by_engine;
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};
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/* Globals */
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static struct worker *workers = NULL;
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struct worker null_worker = { .id = 0 };
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static unsigned long clicount = 0;
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static int server_port = DEFAULT_PORT;
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static int num_workers = NUM_WORKERS;
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static unsigned int max_frame_size = MAX_FRAME_SIZE;
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struct timeval processing_delay = {0, 0};
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static bool debug = false;
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static bool pipelining = false;
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static bool async = false;
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static bool fragmentation = false;
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static const char *spoe_frm_err_reasons[SPOE_FRM_ERRS] = {
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[SPOE_FRM_ERR_NONE] = "normal",
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[SPOE_FRM_ERR_IO] = "I/O error",
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[SPOE_FRM_ERR_TOUT] = "a timeout occurred",
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[SPOE_FRM_ERR_TOO_BIG] = "frame is too big",
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[SPOE_FRM_ERR_INVALID] = "invalid frame received",
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[SPOE_FRM_ERR_NO_VSN] = "version value not found",
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[SPOE_FRM_ERR_NO_FRAME_SIZE] = "max-frame-size value not found",
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[SPOE_FRM_ERR_NO_CAP] = "capabilities value not found",
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[SPOE_FRM_ERR_BAD_VSN] = "unsupported version",
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[SPOE_FRM_ERR_BAD_FRAME_SIZE] = "max-frame-size too big or too small",
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[SPOE_FRM_ERR_FRAG_NOT_SUPPORTED] = "fragmentation not supported",
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[SPOE_FRM_ERR_INTERLACED_FRAMES] = "invalid interlaced frames",
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[SPOE_FRM_ERR_FRAMEID_NOTFOUND] = "frame-id not found",
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[SPOE_FRM_ERR_RES] = "resource allocation error",
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[SPOE_FRM_ERR_UNKNOWN] = "an unknown error occurred",
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};
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static void signal_cb(evutil_socket_t, short, void *);
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static void accept_cb(evutil_socket_t, short, void *);
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static void worker_monitor_cb(evutil_socket_t, short, void *);
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static void process_frame_cb(evutil_socket_t, short, void *);
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static void read_frame_cb(evutil_socket_t, short, void *);
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static void write_frame_cb(evutil_socket_t, short, void *);
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static void use_spoe_engine(struct client *);
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static void unuse_spoe_engine(struct client *);
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static void release_frame(struct spoe_frame *);
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static void release_client(struct client *);
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/* Check the protocol version. It returns -1 if an error occurred, the number of
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* read bytes otherwise. */
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static int
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check_proto_version(struct spoe_frame *frame, char **buf, char *end)
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{
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char *str, *p = *buf;
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uint64_t sz;
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int ret;
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/* Get the list of all supported versions by HAProxy */
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if ((*p++ & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR)
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return -1;
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ret = spoe_decode_buffer(&p, end, &str, &sz);
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if (ret == -1 || !str)
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return -1;
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DEBUG(frame->worker, "<%lu> Supported versions : %.*s",
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frame->client->id, (int)sz, str);
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/* TODO: Find the right version in supported ones */
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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/* Check max frame size value. It returns -1 if an error occurred, the number of
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* read bytes otherwise. */
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static int
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check_max_frame_size(struct spoe_frame *frame, char **buf, char *end)
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{
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char *p = *buf;
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uint64_t sz;
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int type, ret;
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/* Get the max-frame-size value of HAProxy */
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type = *p++;
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if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64)
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return -1;
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if (decode_varint(&p, end, &sz) == -1)
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return -1;
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/* Keep the lower value */
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if (sz < frame->client->max_frame_size)
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frame->client->max_frame_size = sz;
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DEBUG(frame->worker, "<%lu> HAProxy maximum frame size : %u",
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frame->client->id, (unsigned int)sz);
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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/* Check healthcheck value. It returns -1 if an error occurred, the number of
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* read bytes otherwise. */
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static int
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check_healthcheck(struct spoe_frame *frame, char **buf, char *end)
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{
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char *p = *buf;
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int type, ret;
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/* Get the "healthcheck" value */
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type = *p++;
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if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_BOOL)
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return -1;
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frame->hcheck = ((type & SPOE_DATA_FL_TRUE) == SPOE_DATA_FL_TRUE);
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DEBUG(frame->worker, "<%lu> HELLO healthcheck : %s",
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frame->client->id, (frame->hcheck ? "true" : "false"));
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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/* Check capabilities value. It returns -1 if an error occurred, the number of
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* read bytes otherwise. */
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static int
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check_capabilities(struct spoe_frame *frame, char **buf, char *end)
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{
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struct client *client = frame->client;
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char *str, *p = *buf;
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uint64_t sz;
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int ret;
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if ((*p++ & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR)
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return -1;
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if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
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return -1;
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if (str == NULL) /* this is not an error */
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goto end;
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DEBUG(frame->worker, "<%lu> HAProxy capabilities : %.*s",
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client->id, (int)sz, str);
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while (sz) {
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char *delim;
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/* Skip leading spaces */
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for (; isspace(*str) && sz; sz--);
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if (sz >= 10 && !strncmp(str, "pipelining", 10)) {
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str += 10; sz -= 10;
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if (!sz || isspace(*str) || *str == ',') {
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DEBUG(frame->worker,
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"<%lu> HAProxy supports frame pipelining",
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client->id);
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client->pipelining = true;
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}
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}
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else if (sz >= 5 && !strncmp(str, "async", 5)) {
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str += 5; sz -= 5;
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if (!sz || isspace(*str) || *str == ',') {
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DEBUG(frame->worker,
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"<%lu> HAProxy supports asynchronous frame",
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client->id);
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client->async = true;
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}
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}
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else if (sz >= 13 && !strncmp(str, "fragmentation", 13)) {
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str += 13; sz -= 13;
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if (!sz || isspace(*str) || *str == ',') {
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DEBUG(frame->worker,
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"<%lu> HAProxy supports fragmented frame",
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client->id);
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client->fragmentation = true;
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}
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}
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if (!sz || (delim = memchr(str, ',', sz)) == NULL)
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break;
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delim++;
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sz -= (delim - str);
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str = delim;
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}
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end:
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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/* Check engine-id value. It returns -1 if an error occurred, the number of
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* read bytes otherwise. */
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static int
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check_engine_id(struct spoe_frame *frame, char **buf, char *end)
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{
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struct client *client = frame->client;
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char *str, *p = *buf;
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uint64_t sz;
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int ret;
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if ((*p++ & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR)
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return -1;
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if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
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return -1;
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if (str == NULL) /* this is not an error */
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goto end;
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if (client->engine != NULL)
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goto end;
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DEBUG(frame->worker, "<%lu> HAProxy engine id : %.*s",
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client->id, (int)sz, str);
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client->engine_id = strndup(str, (int)sz);
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end:
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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static int
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acc_payload(struct spoe_frame *frame)
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{
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struct client *client = frame->client;
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char *buf;
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size_t len = frame->len - frame->offset;
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int ret = frame->offset;
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/* No need to accumulation payload */
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if (frame->fragmented == false)
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return ret;
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buf = realloc(frame->frag_buf, frame->frag_len + len);
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if (buf == NULL) {
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client->status_code = SPOE_FRM_ERR_RES;
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return -1;
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}
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memcpy(buf + frame->frag_len, frame->buf + frame->offset, len);
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frame->frag_buf = buf;
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frame->frag_len += len;
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if (!(frame->flags & SPOE_FRM_FL_FIN)) {
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/* Wait for next parts */
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frame->buf = (char *)(frame->data);
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frame->offset = 0;
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frame->len = 0;
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frame->flags = 0;
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return 1;
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}
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frame->buf = frame->frag_buf;
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frame->len = frame->frag_len;
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frame->offset = 0;
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return ret;
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}
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/* Check disconnect status code. It returns -1 if an error occurred, the number
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* of read bytes otherwise. */
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static int
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check_discon_status_code(struct spoe_frame *frame, char **buf, char *end)
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{
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char *p = *buf;
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uint64_t sz;
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int type, ret;
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|
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/* Get the "status-code" value */
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type = *p++;
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if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 &&
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(type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64)
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return -1;
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if (decode_varint(&p, end, &sz) == -1)
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return -1;
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frame->client->status_code = (unsigned int)sz;
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DEBUG(frame->worker, "<%lu> Disconnect status code : %u",
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frame->client->id, frame->client->status_code);
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ret = (p - *buf);
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*buf = p;
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return ret;
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}
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|
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/* Check the disconnect message. It returns -1 if an error occurred, the number
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* of read bytes otherwise. */
|
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static int
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check_discon_message(struct spoe_frame *frame, char **buf, char *end)
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{
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char *str, *p = *buf;
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uint64_t sz;
|
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int ret;
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|
|
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/* Get the "message" value */
|
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if ((*p++ & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR)
|
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return -1;
|
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ret = spoe_decode_buffer(&p, end, &str, &sz);
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if (ret == -1 || !str)
|
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return -1;
|
|
|
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DEBUG(frame->worker, "<%lu> Disconnect message : %.*s",
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frame->client->id, (int)sz, str);
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|
|
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ret = (p - *buf);
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*buf = p;
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return ret;
|
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}
|
|
|
|
|
|
|
|
/* Decode a HELLO frame received from HAProxy. It returns -1 if an error
|
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* occurred, otherwise the number of read bytes. HELLO frame cannot be
|
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* ignored and having another frame than a HELLO frame is an error. */
|
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static int
|
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handle_hahello(struct spoe_frame *frame)
|
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{
|
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struct client *client = frame->client;
|
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char *p, *end;
|
|
|
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p = frame->buf;
|
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end = frame->buf + frame->len;
|
|
|
|
/* Check frame type: we really want a HELLO frame */
|
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if (*p++ != SPOE_FRM_T_HAPROXY_HELLO)
|
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goto error;
|
|
|
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DEBUG(frame->worker, "<%lu> Decode HAProxy HELLO frame", client->id);
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|
|
|
/* Retrieve flags */
|
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memcpy((char *)&(frame->flags), p, 4);
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frame->flags = ntohl(frame->flags);
|
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p += 4;
|
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|
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/* Fragmentation is not supported for HELLO frame */
|
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if (!(frame->flags & SPOE_FRM_FL_FIN)) {
|
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client->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
|
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goto error;
|
|
}
|
|
|
|
/* stream-id and frame-id must be cleared */
|
|
if (*p != 0 || *(p+1) != 0) {
|
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client->status_code = SPOE_FRM_ERR_INVALID;
|
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goto error;
|
|
}
|
|
p += 2;
|
|
|
|
/* Loop on K/V items */
|
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while (p < end) {
|
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char *str;
|
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uint64_t sz;
|
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|
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/* Decode the item name */
|
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spoe_decode_buffer(&p, end, &str, &sz);
|
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if (!str) {
|
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client->status_code = SPOE_FRM_ERR_INVALID;
|
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goto error;
|
|
}
|
|
|
|
/* Check "supported-versions" K/V item */
|
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if (!memcmp(str, "supported-versions", sz)) {
|
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if (check_proto_version(frame, &p, end) == -1) {
|
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client->status_code = SPOE_FRM_ERR_INVALID;
|
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goto error;
|
|
}
|
|
}
|
|
/* Check "max-frame-size" K/V item */
|
|
else if (!memcmp(str, "max-frame-size", sz)) {
|
|
if (check_max_frame_size(frame, &p, end) == -1) {
|
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client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
/* Check "healthcheck" K/V item */
|
|
else if (!memcmp(str, "healthcheck", sz)) {
|
|
if (check_healthcheck(frame, &p, end) == -1) {
|
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client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
/* Check "capabilities" K/V item */
|
|
else if (!memcmp(str, "capabilities", sz)) {
|
|
if (check_capabilities(frame, &p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
/* Check "engine-id" K/V item */
|
|
else if (!memcmp(str, "engine-id", sz)) {
|
|
if (check_engine_id(frame, &p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
else {
|
|
DEBUG(frame->worker, "<%lu> Skip K/V item : key=%.*s",
|
|
client->id, (int)sz, str);
|
|
|
|
/* Silently ignore unknown item */
|
|
if (spoe_skip_data(&p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (async == false || client->engine_id == NULL)
|
|
client->async = false;
|
|
if (pipelining == false)
|
|
client->pipelining = false;
|
|
|
|
if (client->async == true)
|
|
use_spoe_engine(client);
|
|
|
|
return (p - frame->buf);
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* Decode a DISCONNECT frame received from HAProxy. It returns -1 if an error
|
|
* occurred, otherwise the number of read bytes. DISCONNECT frame cannot be
|
|
* ignored and having another frame than a DISCONNECT frame is an error.*/
|
|
static int
|
|
handle_hadiscon(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
char *p, *end;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf + frame->len;
|
|
|
|
/* Check frame type: we really want a DISCONNECT frame */
|
|
if (*p++ != SPOE_FRM_T_HAPROXY_DISCON)
|
|
goto error;
|
|
|
|
DEBUG(frame->worker, "<%lu> Decode HAProxy DISCONNECT frame", client->id);
|
|
|
|
/* Retrieve flags */
|
|
memcpy((char *)&(frame->flags), p, 4);
|
|
frame->flags = ntohl(frame->flags);
|
|
p += 4;
|
|
|
|
/* Fragmentation is not supported for DISCONNECT frame */
|
|
if (!(frame->flags & SPOE_FRM_FL_FIN)) {
|
|
client->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
|
|
goto error;
|
|
}
|
|
|
|
/* stream-id and frame-id must be cleared */
|
|
if (*p != 0 || *(p+1) != 0) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
p += 2;
|
|
|
|
client->status_code = SPOE_FRM_ERR_NONE;
|
|
|
|
/* Loop on K/V items */
|
|
while (p < end) {
|
|
char *str;
|
|
uint64_t sz;
|
|
|
|
/* Decode item key */
|
|
spoe_decode_buffer(&p, end, &str, &sz);
|
|
if (!str) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
|
|
/* Check "status-code" K/V item */
|
|
if (!memcmp(str, "status-code", sz)) {
|
|
if (check_discon_status_code(frame, &p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
/* Check "message" K/V item */
|
|
else if (!memcmp(str, "message", sz)) {
|
|
if (check_discon_message(frame, &p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
else {
|
|
DEBUG(frame->worker, "<%lu> Skip K/V item : key=%.*s",
|
|
client->id, (int)sz, str);
|
|
|
|
/* Silently ignore unknown item */
|
|
if (spoe_skip_data(&p, end) == -1) {
|
|
client->status_code = SPOE_FRM_ERR_INVALID;
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
return (p - frame->buf);
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* Decode a NOTIFY frame received from HAProxy. It returns -1 if an error
|
|
* occurred, 0 if it must be must be ignored, otherwise the number of read
|
|
* bytes. */
|
|
static int
|
|
handle_hanotify(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
char *p, *end;
|
|
uint64_t stream_id, frame_id;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf + frame->len;
|
|
|
|
/* Check frame type */
|
|
if (*p++ != SPOE_FRM_T_HAPROXY_NOTIFY)
|
|
goto ignore;
|
|
|
|
DEBUG(frame->worker, "<%lu> Decode HAProxy NOTIFY frame", client->id);
|
|
|
|
/* Retrieve flags */
|
|
memcpy((char *)&(frame->flags), p, 4);
|
|
frame->flags = ntohl(frame->flags);
|
|
p += 4;
|
|
|
|
/* Fragmentation is not supported */
|
|
if (!(frame->flags & SPOE_FRM_FL_FIN) && fragmentation == false) {
|
|
client->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
|
|
goto error;
|
|
}
|
|
|
|
/* Read the stream-id and frame-id */
|
|
if (decode_varint(&p, end, &stream_id) == -1)
|
|
goto ignore;
|
|
if (decode_varint(&p, end, &frame_id) == -1)
|
|
goto ignore;
|
|
|
|
frame->stream_id = (unsigned int)stream_id;
|
|
frame->frame_id = (unsigned int)frame_id;
|
|
|
|
DEBUG(frame->worker, "<%lu> STREAM-ID=%u - FRAME-ID=%u"
|
|
" - %s frame received"
|
|
" - frag_len=%u - len=%u - offset=%ld",
|
|
client->id, frame->stream_id, frame->frame_id,
|
|
(frame->flags & SPOE_FRM_FL_FIN) ? "unfragmented" : "fragmented",
|
|
frame->frag_len, frame->len, p - frame->buf);
|
|
|
|
frame->fragmented = !(frame->flags & SPOE_FRM_FL_FIN);
|
|
frame->offset = (p - frame->buf);
|
|
return acc_payload(frame);
|
|
|
|
ignore:
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* Decode next part of a fragmented frame received from HAProxy. It returns -1
|
|
* if an error occurred, 0 if it must be must be ignored, otherwise the number
|
|
* of read bytes. */
|
|
static int
|
|
handle_hafrag(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
char *p, *end;
|
|
uint64_t stream_id, frame_id;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf + frame->len;
|
|
|
|
/* Check frame type */
|
|
if (*p++ != SPOE_FRM_T_UNSET)
|
|
goto ignore;
|
|
|
|
DEBUG(frame->worker, "<%lu> Decode Next part of a fragmented frame", client->id);
|
|
|
|
/* Fragmentation is not supported */
|
|
if (fragmentation == false) {
|
|
client->status_code = SPOE_FRM_ERR_FRAG_NOT_SUPPORTED;
|
|
goto error;
|
|
}
|
|
|
|
/* Retrieve flags */
|
|
memcpy((char *)&(frame->flags), p, 4);
|
|
frame->flags = ntohl(frame->flags);
|
|
p+= 4;
|
|
|
|
/* Read the stream-id and frame-id */
|
|
if (decode_varint(&p, end, &stream_id) == -1)
|
|
goto ignore;
|
|
if (decode_varint(&p, end, &frame_id) == -1)
|
|
goto ignore;
|
|
|
|
if (frame->fragmented == false ||
|
|
frame->stream_id != (unsigned int)stream_id ||
|
|
frame->frame_id != (unsigned int)frame_id) {
|
|
client->status_code = SPOE_FRM_ERR_INTERLACED_FRAMES;
|
|
goto error;
|
|
}
|
|
|
|
if (frame->flags & SPOE_FRM_FL_ABRT) {
|
|
DEBUG(frame->worker, "<%lu> STREAM-ID=%u - FRAME-ID=%u"
|
|
" - Abort processing of a fragmented frame"
|
|
" - frag_len=%u - len=%u - offset=%ld",
|
|
client->id, frame->stream_id, frame->frame_id,
|
|
frame->frag_len, frame->len, p - frame->buf);
|
|
goto ignore;
|
|
}
|
|
|
|
DEBUG(frame->worker, "<%lu> STREAM-ID=%u - FRAME-ID=%u"
|
|
" - %s fragment of a fragmented frame received"
|
|
" - frag_len=%u - len=%u - offset=%ld",
|
|
client->id, frame->stream_id, frame->frame_id,
|
|
(frame->flags & SPOE_FRM_FL_FIN) ? "last" : "next",
|
|
frame->frag_len, frame->len, p - frame->buf);
|
|
|
|
frame->offset = (p - frame->buf);
|
|
return acc_payload(frame);
|
|
|
|
ignore:
|
|
return 0;
|
|
|
|
error:
|
|
return -1;
|
|
}
|
|
|
|
/* Encode a HELLO frame to send it to HAProxy. It returns the number of written
|
|
* bytes. */
|
|
static int
|
|
prepare_agenthello(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
char *p, *end;
|
|
char capabilities[64];
|
|
int n;
|
|
unsigned int flags = SPOE_FRM_FL_FIN;
|
|
|
|
DEBUG(frame->worker, "<%lu> Encode Agent HELLO frame", client->id);
|
|
frame->type = SPOA_FRM_T_AGENT;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf+max_frame_size;
|
|
|
|
/* Frame Type */
|
|
*p++ = SPOE_FRM_T_AGENT_HELLO;
|
|
|
|
/* Set flags */
|
|
flags = htonl(flags);
|
|
memcpy(p, (char *)&flags, 4);
|
|
p += 4;
|
|
|
|
/* No stream-id and frame-id for HELLO frames */
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
|
|
/* "version" K/V item */
|
|
spoe_encode_buffer("version", 7, &p, end);
|
|
*p++ = SPOE_DATA_T_STR;
|
|
spoe_encode_buffer(SPOP_VERSION, SLEN(SPOP_VERSION), &p, end);
|
|
DEBUG(frame->worker, "<%lu> Agent version : %s",
|
|
client->id, SPOP_VERSION);
|
|
|
|
|
|
/* "max-frame-size" K/V item */
|
|
spoe_encode_buffer("max-frame-size", 14, &p ,end);
|
|
*p++ = SPOE_DATA_T_UINT32;
|
|
encode_varint(client->max_frame_size, &p, end);
|
|
DEBUG(frame->worker, "<%lu> Agent maximum frame size : %u",
|
|
client->id, client->max_frame_size);
|
|
|
|
/* "capabilities" K/V item */
|
|
spoe_encode_buffer("capabilities", 12, &p, end);
|
|
*p++ = SPOE_DATA_T_STR;
|
|
|
|
memset(capabilities, 0, sizeof(capabilities));
|
|
n = 0;
|
|
|
|
/* 1. Fragmentation capability ? */
|
|
if (fragmentation == true) {
|
|
memcpy(capabilities, "fragmentation", 13);
|
|
n += 13;
|
|
}
|
|
/* 2. Pipelining capability ? */
|
|
if (client->pipelining == true) {
|
|
if (n) capabilities[n++] = ',';
|
|
memcpy(capabilities + n, "pipelining", 10);
|
|
n += 10;
|
|
}
|
|
/* 3. Async capability ? */
|
|
if (client->async == true) {
|
|
if (n) capabilities[n++] = ',';
|
|
memcpy(capabilities + n, "async", 5);
|
|
n += 5;
|
|
}
|
|
spoe_encode_buffer(capabilities, n, &p, end);
|
|
|
|
DEBUG(frame->worker, "<%lu> Agent capabilities : %.*s",
|
|
client->id, n, capabilities);
|
|
|
|
frame->len = (p - frame->buf);
|
|
return frame->len;
|
|
}
|
|
|
|
/* Encode a DISCONNECT frame to send it to HAProxy. It returns the number of
|
|
* written bytes. */
|
|
static int
|
|
prepare_agentdicon(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
char *p, *end;
|
|
const char *reason;
|
|
int rlen;
|
|
unsigned int flags = SPOE_FRM_FL_FIN;
|
|
|
|
DEBUG(frame->worker, "<%lu> Encode Agent DISCONNECT frame", client->id);
|
|
frame->type = SPOA_FRM_T_AGENT;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf+max_frame_size;
|
|
|
|
if (client->status_code >= SPOE_FRM_ERRS)
|
|
client->status_code = SPOE_FRM_ERR_UNKNOWN;
|
|
reason = spoe_frm_err_reasons[client->status_code];
|
|
rlen = strlen(reason);
|
|
|
|
/* Frame type */
|
|
*p++ = SPOE_FRM_T_AGENT_DISCON;
|
|
|
|
/* Set flags */
|
|
flags = htonl(flags);
|
|
memcpy(p, (char *)&flags, 4);
|
|
p += 4;
|
|
|
|
/* No stream-id and frame-id for DISCONNECT frames */
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
|
|
/* There are 2 mandatory items: "status-code" and "message" */
|
|
|
|
/* "status-code" K/V item */
|
|
spoe_encode_buffer("status-code", 11, &p, end);
|
|
*p++ = SPOE_DATA_T_UINT32;
|
|
encode_varint(client->status_code, &p, end);
|
|
DEBUG(frame->worker, "<%lu> Disconnect status code : %u",
|
|
client->id, client->status_code);
|
|
|
|
/* "message" K/V item */
|
|
spoe_encode_buffer("message", 7, &p, end);
|
|
*p++ = SPOE_DATA_T_STR;
|
|
spoe_encode_buffer(reason, rlen, &p, end);
|
|
DEBUG(frame->worker, "<%lu> Disconnect message : %s",
|
|
client->id, reason);
|
|
|
|
frame->len = (p - frame->buf);
|
|
return frame->len;
|
|
}
|
|
|
|
/* Encode a ACK frame to send it to HAProxy. It returns the number of written
|
|
* bytes. */
|
|
static int
|
|
prepare_agentack(struct spoe_frame *frame)
|
|
{
|
|
char *p, *end;
|
|
unsigned int flags = SPOE_FRM_FL_FIN;
|
|
|
|
/* Be careful here, in async mode, frame->client can be NULL */
|
|
|
|
DEBUG(frame->worker, "Encode Agent ACK frame");
|
|
frame->type = SPOA_FRM_T_AGENT;
|
|
|
|
p = frame->buf;
|
|
end = frame->buf+max_frame_size;
|
|
|
|
/* Frame type */
|
|
*p++ = SPOE_FRM_T_AGENT_ACK;
|
|
|
|
/* Set flags */
|
|
flags = htonl(flags);
|
|
memcpy(p, (char *)&flags, 4);
|
|
p += 4;
|
|
|
|
/* Set stream-id and frame-id for ACK frames */
|
|
encode_varint(frame->stream_id, &p, end);
|
|
encode_varint(frame->frame_id, &p, end);
|
|
|
|
DEBUG(frame->worker, "STREAM-ID=%u - FRAME-ID=%u",
|
|
frame->stream_id, frame->frame_id);
|
|
|
|
frame->len = (p - frame->buf);
|
|
return frame->len;
|
|
}
|
|
|
|
static int
|
|
create_server_socket(void)
|
|
{
|
|
struct sockaddr_in listen_addr;
|
|
int fd, yes = 1;
|
|
|
|
fd = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (fd < 0) {
|
|
LOG(&null_worker, "Failed to create service socket : %m");
|
|
return -1;
|
|
}
|
|
|
|
memset(&listen_addr, 0, sizeof(listen_addr));
|
|
listen_addr.sin_family = AF_INET;
|
|
listen_addr.sin_addr.s_addr = INADDR_ANY;
|
|
listen_addr.sin_port = htons(server_port);
|
|
|
|
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0 ||
|
|
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) < 0) {
|
|
LOG(&null_worker, "Failed to set option on server socket : %m");
|
|
return -1;
|
|
}
|
|
|
|
if (bind(fd, (struct sockaddr *) &listen_addr, sizeof(listen_addr)) < 0) {
|
|
LOG(&null_worker, "Failed to bind server socket : %m");
|
|
return -1;
|
|
}
|
|
|
|
if (listen(fd, CONNECTION_BACKLOG) < 0) {
|
|
LOG(&null_worker, "Failed to listen on server socket : %m");
|
|
return -1;
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static void
|
|
release_frame(struct spoe_frame *frame)
|
|
{
|
|
struct worker *worker;
|
|
|
|
if (frame == NULL)
|
|
return;
|
|
|
|
if (event_pending(&frame->process_frame_event, EV_TIMEOUT, NULL))
|
|
event_del(&frame->process_frame_event);
|
|
|
|
worker = frame->worker;
|
|
LIST_DEL(&frame->list);
|
|
if (frame->frag_buf)
|
|
free(frame->frag_buf);
|
|
memset(frame, 0, sizeof(*frame)+max_frame_size+4);
|
|
LIST_ADDQ(&worker->frames, &frame->list);
|
|
}
|
|
|
|
static void
|
|
release_client(struct client *c)
|
|
{
|
|
struct spoe_frame *frame, *back;
|
|
|
|
if (c == NULL)
|
|
return;
|
|
|
|
DEBUG(c->worker, "<%lu> Release client", c->id);
|
|
|
|
LIST_DEL(&c->by_worker);
|
|
c->worker->nbclients--;
|
|
|
|
unuse_spoe_engine(c);
|
|
free(c->engine_id);
|
|
|
|
if (event_pending(&c->read_frame_event, EV_READ, NULL))
|
|
event_del(&c->read_frame_event);
|
|
if (event_pending(&c->write_frame_event, EV_WRITE, NULL))
|
|
event_del(&c->write_frame_event);
|
|
|
|
release_frame(c->incoming_frame);
|
|
release_frame(c->outgoing_frame);
|
|
list_for_each_entry_safe(frame, back, &c->processing_frames, list) {
|
|
release_frame(frame);
|
|
}
|
|
list_for_each_entry_safe(frame, back, &c->outgoing_frames, list) {
|
|
release_frame(frame);
|
|
}
|
|
|
|
if (c->fd >= 0)
|
|
close(c->fd);
|
|
|
|
free(c);
|
|
}
|
|
|
|
static void
|
|
reset_frame(struct spoe_frame *frame)
|
|
{
|
|
if (frame == NULL)
|
|
return;
|
|
|
|
if (frame->frag_buf)
|
|
free(frame->frag_buf);
|
|
|
|
frame->type = SPOA_FRM_T_UNKNOWN;
|
|
frame->buf = (char *)(frame->data);
|
|
frame->offset = 0;
|
|
frame->len = 0;
|
|
frame->stream_id = 0;
|
|
frame->frame_id = 0;
|
|
frame->flags = 0;
|
|
frame->hcheck = false;
|
|
frame->fragmented = false;
|
|
frame->modsec_code = -1;
|
|
frame->frag_buf = NULL;
|
|
frame->frag_len = 0;
|
|
LIST_INIT(&frame->list);
|
|
}
|
|
|
|
static void
|
|
use_spoe_engine(struct client *client)
|
|
{
|
|
struct spoe_engine *eng;
|
|
|
|
if (client->engine_id == NULL)
|
|
return;
|
|
|
|
list_for_each_entry(eng, &client->worker->engines, list) {
|
|
if (!strcmp(eng->id, client->engine_id))
|
|
goto end;
|
|
}
|
|
|
|
if ((eng = malloc(sizeof(*eng))) == NULL) {
|
|
client->async = false;
|
|
return;
|
|
}
|
|
|
|
eng->id = strdup(client->engine_id);
|
|
LIST_INIT(&eng->clients);
|
|
LIST_INIT(&eng->processing_frames);
|
|
LIST_INIT(&eng->outgoing_frames);
|
|
LIST_ADDQ(&client->worker->engines, &eng->list);
|
|
LOG(client->worker, "Add new SPOE engine '%s'", eng->id);
|
|
|
|
end:
|
|
client->engine = eng;
|
|
LIST_ADDQ(&eng->clients, &client->by_engine);
|
|
}
|
|
|
|
static void
|
|
unuse_spoe_engine(struct client *client)
|
|
{
|
|
struct spoe_engine *eng;
|
|
struct spoe_frame *frame, *back;
|
|
|
|
if (client == NULL || client->engine == NULL)
|
|
return;
|
|
|
|
eng = client->engine;
|
|
client->engine = NULL;
|
|
LIST_DEL(&client->by_engine);
|
|
if (!LIST_ISEMPTY(&eng->clients))
|
|
return;
|
|
|
|
LOG(client->worker, "Remove SPOE engine '%s'", eng->id);
|
|
LIST_DEL(&eng->list);
|
|
|
|
list_for_each_entry_safe(frame, back, &eng->processing_frames, list) {
|
|
release_frame(frame);
|
|
}
|
|
list_for_each_entry_safe(frame, back, &eng->outgoing_frames, list) {
|
|
release_frame(frame);
|
|
}
|
|
free(eng->id);
|
|
free(eng);
|
|
}
|
|
|
|
|
|
static struct spoe_frame *
|
|
acquire_incoming_frame(struct client *client)
|
|
{
|
|
struct spoe_frame *frame;
|
|
|
|
frame = client->incoming_frame;
|
|
if (frame != NULL)
|
|
return frame;
|
|
|
|
if (LIST_ISEMPTY(&client->worker->frames)) {
|
|
if ((frame = calloc(1, sizeof(*frame)+max_frame_size+4)) == NULL) {
|
|
LOG(client->worker, "Failed to allocate new frame : %m");
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
frame = LIST_NEXT(&client->worker->frames, typeof(frame), list);
|
|
LIST_DEL(&frame->list);
|
|
}
|
|
|
|
reset_frame(frame);
|
|
frame->worker = client->worker;
|
|
frame->engine = client->engine;
|
|
frame->client = client;
|
|
|
|
if (event_assign(&frame->process_frame_event, client->worker->base, -1,
|
|
EV_TIMEOUT|EV_PERSIST, process_frame_cb, frame) < 0) {
|
|
LOG(client->worker, "Failed to create frame event");
|
|
return NULL;
|
|
}
|
|
|
|
client->incoming_frame = frame;
|
|
return frame;
|
|
}
|
|
|
|
static struct spoe_frame *
|
|
acquire_outgoing_frame(struct client *client)
|
|
{
|
|
struct spoe_engine *engine = client->engine;
|
|
struct spoe_frame *frame = NULL;
|
|
|
|
if (client->outgoing_frame != NULL)
|
|
frame = client->outgoing_frame;
|
|
else if (!LIST_ISEMPTY(&client->outgoing_frames)) {
|
|
frame = LIST_NEXT(&client->outgoing_frames, typeof(frame), list);
|
|
LIST_DEL(&frame->list);
|
|
client->outgoing_frame = frame;
|
|
}
|
|
else if (engine!= NULL && !LIST_ISEMPTY(&engine->outgoing_frames)) {
|
|
frame = LIST_NEXT(&engine->outgoing_frames, typeof(frame), list);
|
|
LIST_DEL(&frame->list);
|
|
client->outgoing_frame = frame;
|
|
}
|
|
return frame;
|
|
}
|
|
|
|
static void
|
|
write_frame(struct client *client, struct spoe_frame *frame)
|
|
{
|
|
uint32_t netint;
|
|
|
|
LIST_DEL(&frame->list);
|
|
|
|
frame->buf = (char *)(frame->data);
|
|
frame->offset = 0;
|
|
netint = htonl(frame->len);
|
|
memcpy(frame->buf, &netint, 4);
|
|
|
|
if (client != NULL) { /* HELLO or DISCONNECT frames */
|
|
event_add(&client->write_frame_event, NULL);
|
|
|
|
/* Try to process the frame as soon as possible, and always
|
|
* attach it to the client */
|
|
if (client->async || client->pipelining) {
|
|
if (client->outgoing_frame == NULL)
|
|
client->outgoing_frame = frame;
|
|
else
|
|
LIST_ADD(&client->outgoing_frames, &frame->list);
|
|
}
|
|
else {
|
|
client->outgoing_frame = frame;
|
|
event_del(&client->read_frame_event);
|
|
}
|
|
}
|
|
else { /* for all other frames */
|
|
if (frame->client == NULL) { /* async mode ! */
|
|
LIST_ADDQ(&frame->engine->outgoing_frames, &frame->list);
|
|
list_for_each_entry(client, &frame->engine->clients, by_engine)
|
|
event_add(&client->write_frame_event, NULL);
|
|
}
|
|
else if (frame->client->pipelining) {
|
|
LIST_ADDQ(&frame->client->outgoing_frames, &frame->list);
|
|
event_add(&frame->client->write_frame_event, NULL);
|
|
}
|
|
else {
|
|
frame->client->outgoing_frame = frame;
|
|
event_add(&frame->client->write_frame_event, NULL);
|
|
event_del(&frame->client->read_frame_event);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
process_incoming_frame(struct spoe_frame *frame)
|
|
{
|
|
struct client *client = frame->client;
|
|
|
|
if (event_add(&frame->process_frame_event, &processing_delay) < 0) {
|
|
LOG(client->worker, "Failed to process incoming frame");
|
|
release_frame(frame);
|
|
return;
|
|
}
|
|
|
|
if (client->async) {
|
|
frame->client = NULL;
|
|
LIST_ADDQ(&frame->engine->processing_frames, &frame->list);
|
|
}
|
|
else if (client->pipelining)
|
|
LIST_ADDQ(&client->processing_frames, &frame->list);
|
|
else
|
|
event_del(&client->read_frame_event);
|
|
}
|
|
|
|
static void
|
|
signal_cb(evutil_socket_t sig, short events, void *user_data)
|
|
{
|
|
struct event_base *base = user_data;
|
|
int i;
|
|
|
|
DEBUG(&null_worker, "Stopping the server");
|
|
|
|
event_base_loopbreak(base);
|
|
DEBUG(&null_worker, "Main event loop stopped");
|
|
|
|
for (i = 0; i < num_workers; i++) {
|
|
event_base_loopbreak(workers[i].base);
|
|
DEBUG(&null_worker, "Event loop stopped for worker %02d",
|
|
workers[i].id);
|
|
}
|
|
}
|
|
|
|
static void
|
|
worker_monitor_cb(evutil_socket_t fd, short events, void *arg)
|
|
{
|
|
struct worker *worker = arg;
|
|
|
|
LOG(worker, "%u clients connected", worker->nbclients);
|
|
}
|
|
|
|
static void
|
|
process_frame_cb(evutil_socket_t fd, short events, void *arg)
|
|
{
|
|
struct spoe_frame *frame = arg;
|
|
char *p, *end;
|
|
int ret;
|
|
|
|
DEBUG(frame->worker,
|
|
"Process frame messages : STREAM-ID=%u - FRAME-ID=%u - length=%u bytes",
|
|
frame->stream_id, frame->frame_id, frame->len - frame->offset);
|
|
|
|
p = frame->buf + frame->offset;
|
|
end = frame->buf + frame->len;
|
|
|
|
/* Loop on messages */
|
|
while (p < end) {
|
|
char *str;
|
|
uint64_t sz;
|
|
int nbargs;
|
|
|
|
/* Decode the message name */
|
|
spoe_decode_buffer(&p, end, &str, &sz);
|
|
if (!str)
|
|
goto stop_processing;
|
|
|
|
DEBUG(frame->worker, "Process SPOE Message '%.*s'", (int)sz, str);
|
|
|
|
nbargs = *p++; /* Get the number of arguments */
|
|
frame->offset = (p - frame->buf); /* Save index to handle errors and skip args */
|
|
if (!memcmp(str, "check-request", sz)) {
|
|
struct modsecurity_parameters params;
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
if (nbargs != 8)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode unique id. */
|
|
if (spoe_decode_data(&p, end, ¶ms.uniqueid) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode method. */
|
|
if (spoe_decode_data(&p, end, ¶ms.method) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode path. */
|
|
if (spoe_decode_data(&p, end, ¶ms.path) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode query. */
|
|
if (spoe_decode_data(&p, end, ¶ms.query) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode protocol version. */
|
|
if (spoe_decode_data(&p, end, ¶ms.vers) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode hdrs. */
|
|
if (spoe_decode_data(&p, end, ¶ms.hdrs_bin) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode body length. */
|
|
if (spoe_decode_data(&p, end, ¶ms.body_length) == -1)
|
|
goto skip_message;
|
|
|
|
/* Decode parameter name. */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
|
|
/* Decode body. */
|
|
if (spoe_decode_data(&p, end, ¶ms.body) == -1)
|
|
goto skip_message;
|
|
|
|
frame->modsec_code = modsecurity_process(frame->worker, ¶ms);
|
|
}
|
|
else {
|
|
skip_message:
|
|
p = frame->buf + frame->offset; /* Restore index */
|
|
|
|
while (nbargs-- > 0) {
|
|
/* Silently ignore argument: its name and its value */
|
|
if (spoe_decode_buffer(&p, end, &str, &sz) == -1)
|
|
goto stop_processing;
|
|
if (spoe_skip_data(&p, end) == -1)
|
|
goto stop_processing;
|
|
}
|
|
}
|
|
}
|
|
|
|
stop_processing:
|
|
/* Prepare agent ACK frame */
|
|
frame->buf = (char *)(frame->data) + 4;
|
|
frame->offset = 0;
|
|
frame->len = 0;
|
|
frame->flags = 0;
|
|
|
|
ret = prepare_agentack(frame);
|
|
p = frame->buf + ret;
|
|
end = frame->buf+max_frame_size;
|
|
|
|
if (frame->modsec_code != -1) {
|
|
DEBUG(frame->worker, "Add action : set variable code=%u",
|
|
frame->modsec_code);
|
|
|
|
*p++ = SPOE_ACT_T_SET_VAR; /* Action type */
|
|
*p++ = 3; /* Number of args */
|
|
*p++ = SPOE_SCOPE_TXN; /* Arg 1: the scope */
|
|
spoe_encode_buffer("code", 8, &p, end); /* Arg 2: variable name */
|
|
*p++ = SPOE_DATA_T_UINT32;
|
|
encode_varint(frame->modsec_code, &p, end); /* Arg 3: variable value */
|
|
frame->len = (p - frame->buf);
|
|
}
|
|
write_frame(NULL, frame);
|
|
}
|
|
|
|
static void
|
|
read_frame_cb(evutil_socket_t fd, short events, void *arg)
|
|
{
|
|
struct client *client = arg;
|
|
struct spoe_frame *frame;
|
|
uint32_t netint;
|
|
int n;
|
|
|
|
DEBUG(client->worker, "<%lu> %s", client->id, __FUNCTION__);
|
|
if ((frame = acquire_incoming_frame(client)) == NULL)
|
|
goto close;
|
|
|
|
frame->type = SPOA_FRM_T_HAPROXY;
|
|
if (frame->buf == (char *)(frame->data)) {
|
|
/* Read the frame length: frame->buf points on length part (frame->data) */
|
|
n = read(client->fd, frame->buf+frame->offset, 4-frame->offset);
|
|
if (n <= 0) {
|
|
if (n < 0)
|
|
LOG(client->worker, "Failed to read frame length : %m");
|
|
goto close;
|
|
}
|
|
frame->offset += n;
|
|
if (frame->offset != 4)
|
|
return;
|
|
memcpy(&netint, frame->buf, 4);
|
|
frame->buf += 4;
|
|
frame->offset = 0;
|
|
frame->len = ntohl(netint);
|
|
}
|
|
|
|
/* Read the frame: frame->buf points on frame part (frame->data+4)*/
|
|
n = read(client->fd, frame->buf + frame->offset,
|
|
frame->len - frame->offset);
|
|
if (n <= 0) {
|
|
if (n < 0) {
|
|
LOG(client->worker, "Frame to read frame : %m");
|
|
goto close;
|
|
}
|
|
return;
|
|
}
|
|
frame->offset += n;
|
|
if (frame->offset != frame->len)
|
|
return;
|
|
frame->offset = 0;
|
|
|
|
DEBUG(client->worker, "<%lu> New Frame of %u bytes received",
|
|
client->id, frame->len);
|
|
|
|
switch (client->state) {
|
|
case SPOA_ST_CONNECTING:
|
|
if (handle_hahello(frame) < 0) {
|
|
LOG(client->worker, "Failed to decode HELLO frame");
|
|
goto disconnect;
|
|
}
|
|
prepare_agenthello(frame);
|
|
goto write_frame;
|
|
|
|
case SPOA_ST_PROCESSING:
|
|
if (frame->buf[0] == SPOE_FRM_T_HAPROXY_DISCON) {
|
|
client->state = SPOA_ST_DISCONNECTING;
|
|
goto disconnecting;
|
|
}
|
|
if (frame->buf[0] == SPOE_FRM_T_UNSET)
|
|
n = handle_hafrag(frame);
|
|
else
|
|
n = handle_hanotify(frame);
|
|
|
|
if (n < 0) {
|
|
LOG(client->worker, "Failed to decode frame: %s",
|
|
spoe_frm_err_reasons[client->status_code]);
|
|
goto disconnect;
|
|
}
|
|
else if (n == 0) {
|
|
LOG(client->worker, "Ignore invalid/unknown/aborted frame");
|
|
goto ignore_frame;
|
|
}
|
|
else if (n == 1)
|
|
goto noop;
|
|
else
|
|
goto process_frame;
|
|
|
|
case SPOA_ST_DISCONNECTING:
|
|
disconnecting:
|
|
if (handle_hadiscon(frame) < 0) {
|
|
LOG(client->worker, "Failed to decode DISCONNECT frame");
|
|
goto disconnect;
|
|
}
|
|
if (client->status_code != SPOE_FRM_ERR_NONE)
|
|
LOG(client->worker, "<%lu> Peer closed connection: %s",
|
|
client->id, spoe_frm_err_reasons[client->status_code]);
|
|
goto disconnect;
|
|
}
|
|
|
|
noop:
|
|
return;
|
|
|
|
ignore_frame:
|
|
reset_frame(frame);
|
|
return;
|
|
|
|
process_frame:
|
|
process_incoming_frame(frame);
|
|
client->incoming_frame = NULL;
|
|
return;
|
|
|
|
write_frame:
|
|
write_frame(client, frame);
|
|
client->incoming_frame = NULL;
|
|
return;
|
|
|
|
disconnect:
|
|
client->state = SPOA_ST_DISCONNECTING;
|
|
if (prepare_agentdicon(frame) < 0) {
|
|
LOG(client->worker, "Failed to encode DISCONNECT frame");
|
|
goto close;
|
|
}
|
|
goto write_frame;
|
|
|
|
close:
|
|
release_client(client);
|
|
}
|
|
|
|
static void
|
|
write_frame_cb(evutil_socket_t fd, short events, void *arg)
|
|
{
|
|
struct client *client = arg;
|
|
struct spoe_frame *frame;
|
|
int n;
|
|
|
|
DEBUG(client->worker, "<%lu> %s", client->id, __FUNCTION__);
|
|
if ((frame = acquire_outgoing_frame(client)) == NULL) {
|
|
event_del(&client->write_frame_event);
|
|
return;
|
|
}
|
|
|
|
if (frame->buf == (char *)(frame->data)) {
|
|
/* Write the frame length: frame->buf points on length part (frame->data) */
|
|
n = write(client->fd, frame->buf+frame->offset, 4-frame->offset);
|
|
if (n <= 0) {
|
|
if (n < 0)
|
|
LOG(client->worker, "Failed to write frame length : %m");
|
|
goto close;
|
|
}
|
|
frame->offset += n;
|
|
if (frame->offset != 4)
|
|
return;
|
|
frame->buf += 4;
|
|
frame->offset = 0;
|
|
}
|
|
|
|
/* Write the frame: frame->buf points on frame part (frame->data+4)*/
|
|
n = write(client->fd, frame->buf + frame->offset,
|
|
frame->len - frame->offset);
|
|
if (n <= 0) {
|
|
if (n < 0) {
|
|
LOG(client->worker, "Failed to write frame : %m");
|
|
goto close;
|
|
}
|
|
return;
|
|
}
|
|
frame->offset += n;
|
|
if (frame->offset != frame->len)
|
|
return;
|
|
|
|
DEBUG(client->worker, "<%lu> Frame of %u bytes send",
|
|
client->id, frame->len);
|
|
|
|
switch (client->state) {
|
|
case SPOA_ST_CONNECTING:
|
|
if (frame->hcheck == true) {
|
|
DEBUG(client->worker,
|
|
"<%lu> Close client after healthcheck",
|
|
client->id);
|
|
goto close;
|
|
}
|
|
client->state = SPOA_ST_PROCESSING;
|
|
break;
|
|
|
|
case SPOA_ST_PROCESSING:
|
|
break;
|
|
|
|
case SPOA_ST_DISCONNECTING:
|
|
goto close;
|
|
}
|
|
|
|
release_frame(frame);
|
|
client->outgoing_frame = NULL;
|
|
if (!client->async && !client->pipelining) {
|
|
event_del(&client->write_frame_event);
|
|
event_add(&client->read_frame_event, NULL);
|
|
}
|
|
return;
|
|
|
|
close:
|
|
release_client(client);
|
|
}
|
|
|
|
static void
|
|
accept_cb(int listener, short event, void *arg)
|
|
{
|
|
struct worker *worker;
|
|
struct client *client;
|
|
int fd;
|
|
|
|
worker = &workers[clicount++ % num_workers];
|
|
|
|
if ((fd = accept(listener, NULL, NULL)) < 0) {
|
|
if (errno != EAGAIN && errno != EWOULDBLOCK)
|
|
LOG(worker, "Failed to accept client connection : %m");
|
|
return;
|
|
}
|
|
|
|
DEBUG(&null_worker,
|
|
"<%lu> New Client connection accepted and assigned to worker %02d",
|
|
clicount, worker->id);
|
|
|
|
if (evutil_make_socket_nonblocking(fd) < 0) {
|
|
LOG(&null_worker, "Failed to set client socket to non-blocking : %m");
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
if ((client = calloc(1, sizeof(*client))) == NULL) {
|
|
LOG(&null_worker, "Failed to allocate memory for client state : %m");
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
client->id = clicount;
|
|
client->fd = fd;
|
|
client->worker = worker;
|
|
client->state = SPOA_ST_CONNECTING;
|
|
client->status_code = SPOE_FRM_ERR_NONE;
|
|
client->max_frame_size = max_frame_size;
|
|
client->engine = NULL;
|
|
client->pipelining = false;
|
|
client->async = false;
|
|
client->incoming_frame = NULL;
|
|
client->outgoing_frame = NULL;
|
|
LIST_INIT(&client->processing_frames);
|
|
LIST_INIT(&client->outgoing_frames);
|
|
|
|
LIST_ADDQ(&worker->clients, &client->by_worker);
|
|
|
|
worker->nbclients++;
|
|
|
|
if (event_assign(&client->read_frame_event, worker->base, fd,
|
|
EV_READ|EV_PERSIST, read_frame_cb, client) < 0 ||
|
|
event_assign(&client->write_frame_event, worker->base, fd,
|
|
EV_WRITE|EV_PERSIST, write_frame_cb, client) < 0) {
|
|
LOG(&null_worker, "Failed to create client events");
|
|
release_client(client);
|
|
return;
|
|
}
|
|
event_add(&client->read_frame_event, NULL);
|
|
}
|
|
|
|
static void *
|
|
worker_function(void *data)
|
|
{
|
|
struct client *client, *cback;
|
|
struct spoe_frame *frame, *fback;
|
|
struct worker *worker = data;
|
|
|
|
DEBUG(worker, "Worker ready to process client messages");
|
|
event_base_dispatch(worker->base);
|
|
|
|
list_for_each_entry_safe(client, cback, &worker->clients, by_worker) {
|
|
release_client(client);
|
|
}
|
|
|
|
list_for_each_entry_safe(frame, fback, &worker->frames, list) {
|
|
LIST_DEL(&frame->list);
|
|
free(frame);
|
|
}
|
|
|
|
event_free(worker->monitor_event);
|
|
event_base_free(worker->base);
|
|
DEBUG(worker, "Worker is stopped");
|
|
pthread_exit(&null_worker);
|
|
}
|
|
|
|
|
|
static int
|
|
parse_processing_delay(const char *str)
|
|
{
|
|
unsigned long value;
|
|
|
|
value = 0;
|
|
while (1) {
|
|
unsigned int j;
|
|
|
|
j = *str - '0';
|
|
if (j > 9)
|
|
break;
|
|
str++;
|
|
value *= 10;
|
|
value += j;
|
|
}
|
|
|
|
switch (*str) {
|
|
case '\0': /* no unit = millisecond */
|
|
value *= 1000;
|
|
break;
|
|
case 's': /* second */
|
|
value *= 1000000;
|
|
str++;
|
|
break;
|
|
case 'm': /* millisecond : "ms" */
|
|
if (str[1] != 's')
|
|
return -1;
|
|
value *= 1000;
|
|
str += 2;
|
|
break;
|
|
case 'u': /* microsecond : "us" */
|
|
if (str[1] != 's')
|
|
return -1;
|
|
str += 2;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
if (*str)
|
|
return -1;
|
|
|
|
processing_delay.tv_sec = (time_t)(value / 1000000);
|
|
processing_delay.tv_usec = (suseconds_t)(value % 1000000);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
usage(char *prog)
|
|
{
|
|
fprintf(stderr,
|
|
"Usage : %s [OPTION]...\n"
|
|
" -h Print this message\n"
|
|
" -d Enable the debug mode\n"
|
|
" -f <config-file> ModSecurity configuration file\n"
|
|
" -m <max-frame-size> Specify the maximum frame size (default : %u)\n"
|
|
" -p <port> Specify the port to listen on (default : %d)\n"
|
|
" -n <num-workers> Specify the number of workers (default : %d)\n"
|
|
" -c <capability> Enable the support of the specified capability\n"
|
|
" -t <time> Set a delay to process a message (default: 0)\n"
|
|
" The value is specified in milliseconds by default,\n"
|
|
" but can be in any other unit if the number is suffixed\n"
|
|
" by a unit (us, ms, s)\n"
|
|
"\n"
|
|
" Supported capabilities: fragmentation, pipelining, async\n",
|
|
prog, MAX_FRAME_SIZE, DEFAULT_PORT, NUM_WORKERS);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct event_base *base = NULL;
|
|
struct event *signal_event = NULL, *accept_event = NULL;
|
|
int opt, i, fd = -1;
|
|
const char *configuration_file = NULL;
|
|
|
|
// TODO: add '-t <processing-time>' option
|
|
while ((opt = getopt(argc, argv, "hdm:n:p:c:t:f:")) != -1) {
|
|
switch (opt) {
|
|
case 'h':
|
|
usage(argv[0]);
|
|
return EXIT_SUCCESS;
|
|
case 'd':
|
|
debug = true;
|
|
break;
|
|
case 'm':
|
|
max_frame_size = atoi(optarg);
|
|
break;
|
|
case 'n':
|
|
num_workers = atoi(optarg);
|
|
break;
|
|
case 'p':
|
|
server_port = atoi(optarg);
|
|
break;
|
|
case 'f':
|
|
configuration_file = optarg;
|
|
break;
|
|
case 'c':
|
|
if (!strcmp(optarg, "pipelining"))
|
|
pipelining = true;
|
|
else if (!strcmp(optarg, "async"))
|
|
async = true;
|
|
else if (!strcmp(optarg, "fragmentation"))
|
|
fragmentation = true;
|
|
else
|
|
fprintf(stderr, "WARNING: unsupported capability '%s'\n", optarg);
|
|
break;
|
|
case 't':
|
|
if (!parse_processing_delay(optarg))
|
|
break;
|
|
fprintf(stderr, "%s: failed to parse time '%s'.\n", argv[0], optarg);
|
|
fprintf(stderr, "Try '%s -h' for more information.\n", argv[0]);
|
|
return EXIT_FAILURE;
|
|
default:
|
|
usage(argv[0]);
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|
|
if (!configuration_file) {
|
|
LOG(&null_worker, "ModSecurity configuration is required.\n");
|
|
goto error;
|
|
}
|
|
|
|
if (modsecurity_load(configuration_file) == -1)
|
|
goto error;
|
|
|
|
if (num_workers <= 0) {
|
|
LOG(&null_worker, "%s : Invalid number of workers '%d'\n",
|
|
argv[0], num_workers);
|
|
goto error;
|
|
}
|
|
|
|
if (server_port <= 0) {
|
|
LOG(&null_worker, "%s : Invalid port '%d'\n",
|
|
argv[0], server_port);
|
|
goto error;
|
|
}
|
|
|
|
|
|
if (evthread_use_pthreads() < 0) {
|
|
LOG(&null_worker, "No pthreads support for libevent");
|
|
goto error;
|
|
}
|
|
|
|
if ((base = event_base_new()) == NULL) {
|
|
LOG(&null_worker, "Failed to initialize libevent : %m");
|
|
goto error;
|
|
}
|
|
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
if ((fd = create_server_socket()) < 0) {
|
|
LOG(&null_worker, "Failed to create server socket");
|
|
goto error;
|
|
}
|
|
if (evutil_make_socket_nonblocking(fd) < 0) {
|
|
LOG(&null_worker, "Failed to set server socket to non-blocking");
|
|
goto error;
|
|
}
|
|
|
|
if ((workers = calloc(num_workers, sizeof(*workers))) == NULL) {
|
|
LOG(&null_worker, "Failed to set allocate memory for workers");
|
|
goto error;
|
|
}
|
|
|
|
for (i = 0; i < num_workers; ++i) {
|
|
struct worker *w = &workers[i];
|
|
|
|
w->id = i+1;
|
|
w->nbclients = 0;
|
|
LIST_INIT(&w->engines);
|
|
LIST_INIT(&w->clients);
|
|
LIST_INIT(&w->frames);
|
|
|
|
if ((w->base = event_base_new()) == NULL) {
|
|
LOG(&null_worker,
|
|
"Failed to initialize libevent for worker %02d : %m",
|
|
w->id);
|
|
goto error;
|
|
}
|
|
|
|
w->monitor_event = event_new(w->base, fd, EV_PERSIST,
|
|
worker_monitor_cb, (void *)w);
|
|
if (w->monitor_event == NULL ||
|
|
event_add(w->monitor_event, (struct timeval[]){{5,0}}) < 0) {
|
|
LOG(&null_worker,
|
|
"Failed to create monitor event for worker %02d",
|
|
w->id);
|
|
goto error;
|
|
}
|
|
|
|
if (pthread_create(&w->thread, NULL, worker_function, (void *)w)) {
|
|
LOG(&null_worker,
|
|
"Failed to start thread for worker %02d : %m",
|
|
w->id);
|
|
}
|
|
DEBUG(&null_worker, "Worker %02d initialized", w->id);
|
|
}
|
|
|
|
accept_event = event_new(base, fd, EV_READ|EV_PERSIST, accept_cb,
|
|
(void *)base);
|
|
if (accept_event == NULL || event_add(accept_event, NULL) < 0) {
|
|
LOG(&null_worker, "Failed to create accept event : %m");
|
|
}
|
|
|
|
signal_event = evsignal_new(base, SIGINT, signal_cb, (void *)base);
|
|
if (signal_event == NULL || event_add(signal_event, NULL) < 0) {
|
|
LOG(&null_worker, "Failed to create signal event : %m");
|
|
}
|
|
|
|
DEBUG(&null_worker,
|
|
"Server is ready"
|
|
" [fragmentation=%s - pipelining=%s - async=%s - debug=%s - max-frame-size=%u]",
|
|
(fragmentation?"true":"false"), (pipelining?"true":"false"), (async?"true":"false"),
|
|
(debug?"true":"false"), max_frame_size);
|
|
event_base_dispatch(base);
|
|
|
|
for (i = 0; i < num_workers; i++) {
|
|
struct worker *w = &workers[i];
|
|
|
|
pthread_join(w->thread, NULL);
|
|
DEBUG(&null_worker, "Worker %02d terminated", w->id);
|
|
}
|
|
|
|
free(workers);
|
|
event_free(signal_event);
|
|
event_free(accept_event);
|
|
event_base_free(base);
|
|
close(fd);
|
|
return EXIT_SUCCESS;
|
|
|
|
error:
|
|
if (workers != NULL)
|
|
free(workers);
|
|
if (signal_event != NULL)
|
|
event_free(signal_event);
|
|
if (accept_event != NULL)
|
|
event_free(accept_event);
|
|
if (base != NULL)
|
|
event_base_free(base);
|
|
if (fd != -1)
|
|
close(fd);
|
|
return EXIT_FAILURE;
|
|
}
|