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Put the ModSecurity interception logic onto separated threads #289

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Put the ModSecurity interception logic onto separated threads #289

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e63482c
logging
wfjsw Aug 12, 2022
df8c8ff
other logs
wfjsw Aug 15, 2022
ccb03de
thread
wfjsw Aug 15, 2022
cb3f264
fix log level
wfjsw Aug 15, 2022
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10 changes: 5 additions & 5 deletions src/ngx_http_modsecurity_body_filter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ ngx_http_modsecurity_body_filter(ngx_http_request_t *r, ngx_chain_t *in)

ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity_module);

dd("body filter, recovering ctx: %p", ctx);
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "body filter, recovering ctx: %p", ctx);

if (ctx == NULL) {
return ngx_http_next_body_filter(r, in);
Expand Down Expand Up @@ -155,11 +155,11 @@ ngx_http_modsecurity_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
is_request_processed = chain->buf->last_buf;

if (is_request_processed) {
ngx_pool_t *old_pool;
// ngx_pool_t *old_pool;

old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
// old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
msc_process_response_body(ctx->modsec_transaction);
ngx_http_modsecurity_pcre_malloc_done(old_pool);
// ngx_http_modsecurity_pcre_malloc_done(old_pool);

/* XXX: I don't get how body from modsec being transferred to nginx's buffer. If so - after adjusting of nginx's
XXX: body we can proceed to adjust body size (content-length). see xslt_body_filter() for example */
Expand All @@ -176,7 +176,7 @@ ngx_http_modsecurity_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
}
if (!is_request_processed)
{
dd("buffer was not fully loaded! ctx: %p", ctx);
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "buffer was not fully loaded! ctx: %p", ctx);
}

/* XXX: xflt_filter() -- return NGX_OK here */
Expand Down
4 changes: 4 additions & 0 deletions src/ngx_http_modsecurity_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ngx_thread_pool.h>

#include <modsecurity/modsecurity.h>
#include <modsecurity/transaction.h>
Expand Down Expand Up @@ -117,6 +118,9 @@ typedef struct {
void *rules_set;

ngx_flag_t enable;

ngx_str_t thread_pool_name;
ngx_thread_pool_t *thread_pool;
#if defined(MODSECURITY_SANITY_CHECKS) && (MODSECURITY_SANITY_CHECKS)
ngx_flag_t sanity_checks_enabled;
#endif
Expand Down
24 changes: 12 additions & 12 deletions src/ngx_http_modsecurity_header_filter.c
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Expand Up @@ -415,18 +415,18 @@ ngx_http_modsecurity_header_filter(ngx_http_request_t *r)
int ret = 0;
ngx_uint_t status;
char *http_response_ver;
ngx_pool_t *old_pool;
// ngx_pool_t *old_pool;


/* XXX: if NOT_MODIFIED, do we need to process it at all? see xslt_header_filter() */

ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity_module);

dd("header filter, recovering ctx: %p", ctx);
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "header filter, recovering ctx: %p", ctx);

if (ctx == NULL)
{
dd("something really bad happened or ModSecurity is disabled. going to the next filter.");
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "something really bad happened or ModSecurity is disabled. going to the next filter.");
return ngx_http_next_header_filter(r);
}

Expand All @@ -442,7 +442,7 @@ ngx_http_modsecurity_header_filter(ngx_http_request_t *r)
/*
* FIXME: verify if this request is already processed.
*/
dd("Already processed... going to the next header...");
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "Already processed... going to the next header...");
return ngx_http_next_header_filter(r);
}

Expand All @@ -469,13 +469,13 @@ ngx_http_modsecurity_header_filter(ngx_http_request_t *r)
*/
for (i = 0; ngx_http_modsecurity_headers_out[i].name.len; i++)
{
dd(" Sending header to ModSecurity - header: `%.*s'.",
(int) ngx_http_modsecurity_headers_out[i].name.len,
ngx_http_modsecurity_headers_out[i].name.data);
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, " Sending header to ModSecurity - header: `%.*s'.",
(int)ngx_http_modsecurity_headers_out[i].name.len,
ngx_http_modsecurity_headers_out[i].name.data);

ngx_http_modsecurity_headers_out[i].resolver(r,
ngx_http_modsecurity_headers_out[i].name,
ngx_http_modsecurity_headers_out[i].offset);
ngx_http_modsecurity_headers_out[i].resolver(r,
ngx_http_modsecurity_headers_out[i].name,
ngx_http_modsecurity_headers_out[i].offset);
}

for (i = 0 ;; i++)
Expand Down Expand Up @@ -523,9 +523,9 @@ ngx_http_modsecurity_header_filter(ngx_http_request_t *r)
}
#endif

old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
// old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
msc_process_response_headers(ctx->modsec_transaction, status, http_response_ver);
ngx_http_modsecurity_pcre_malloc_done(old_pool);
// ngx_http_modsecurity_pcre_malloc_done(old_pool);
ret = ngx_http_modsecurity_process_intervention(ctx->modsec_transaction, r, 0);
if (r->error_page) {
return ngx_http_next_header_filter(r);
Expand Down
14 changes: 7 additions & 7 deletions src/ngx_http_modsecurity_log.c
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Original file line number Diff line number Diff line change
Expand Up @@ -41,13 +41,13 @@ ngx_http_modsecurity_log_handler(ngx_http_request_t *r)
ngx_http_modsecurity_ctx_t *ctx;
ngx_http_modsecurity_conf_t *mcf;

dd("catching a new _log_ phase handler");
ngx_log_error(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "catching a new _log_ phase handler");

mcf = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity_module);
if (mcf == NULL || mcf->enable != 1)
{
dd("ModSecurity not enabled... returning");
return NGX_OK;
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "ModSecurity not enabled... returning");
return NGX_DECLINED;
}

/*
Expand All @@ -63,19 +63,19 @@ ngx_http_modsecurity_log_handler(ngx_http_request_t *r)
dd("recovering ctx: %p", ctx);

if (ctx == NULL) {
dd("something really bad happened here. returning NGX_ERROR");
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "something really bad happened here. returning NGX_ERROR");
return NGX_ERROR;
}

if (ctx->logged) {
dd("already logged earlier");
return NGX_OK;
ngx_log_error(NGX_LOG_DEBUG, r->connection->log, 0, "already logged earlier");
return NGX_DECLINED;
}

dd("calling msc_process_logging for %p", ctx);
old_pool = ngx_http_modsecurity_pcre_malloc_init(r->pool);
msc_process_logging(ctx->modsec_transaction);
ngx_http_modsecurity_pcre_malloc_done(old_pool);

return NGX_OK;
return NGX_DECLINED;
}
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