int fcgi_server_send_params_record(fcgi_request_t *fr, uint16_t request_id,
void *record_buffer)
{
/* add all environment variables to r->subprocess_env */
ap_add_common_vars(fr->r);
ap_add_cgi_vars(fr->r);
/* build FCGI_PARAMS record based on apache environement */
apr_pool_t *p = fr->r->pool;
char **env = ap_create_environment(p, fr->r->subprocess_env);
/* TODO: what if params > 64K? */
apr_status_t status;
status = fcgi_record_params_build((fcgi_header_t)record_buffer, request_id, env);
if (status != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, fr->r,
"FastCGI: failed to build params record (id=%u)", request_id);
return HTTP_INTERNAL_SERVER_ERROR;
}
apr_size_t len = fcgi_header_content_length_get((fcgi_header_t)record_buffer) +
fcgi_header_padding_length_get((fcgi_header_t)record_buffer) +
FCGI_HEADER_LEN;
/* send data to the FastCGI server */
ssize_t bytes_sent = socket_send(fr, record_buffer, len);
if (bytes_sent == -1) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, fr->r,
"FastCGI: failed to write to backend server (id=%u)", request_id);
return HTTP_INTERNAL_SERVER_ERROR;
}
/* build and send VOID FCGI_PARAMS record */
status = fcgi_record_params_build((fcgi_header_t)record_buffer, request_id, NULL);
if (status != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, fr->r,
"FastCGI: failed to build params record (id=%u)", request_id);
return HTTP_INTERNAL_SERVER_ERROR;
}
/* send data to the FastCGI server */
bytes_sent = socket_send(fr, record_buffer, FCGI_HEADER_LEN);
if (bytes_sent == -1) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, fr->r,
"FastCGI: failed to write to backend server (id=%u)", request_id);
return HTTP_INTERNAL_SERVER_ERROR;
}
return OK;
}
static int dirsize(void *rp, child_info *pinfo)
{
char **env;
int child_pid;
request_rec *r = (request_rec *) rp;
env = ap_create_environment(r->pool, r->subprocess_env);
ap_error_log2stderr(r->server);
r->filename = "/usr/bin/du"; // fixme: ugly!
r->args = ap_pstrcat(r->pool, "-sk+", r->path_info, NULL);
ap_cleanup_for_exec();
child_pid = ap_call_exec(r, pinfo, r->filename, env, 0);
#ifdef WIN32
return(child_pid);
#else
ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed", r->filename);
exit(0);
return(0);
#endif
}
int suphp_source_child(void *rp, child_info *cinfo) {
request_rec *r = (request_rec *) rp;
suphp_conf *conf;
pool *p = r->main ? r->main->pool : r->pool;
char **argv, **env;
table *empty_table = ap_make_table(p, 0);
conf = ap_get_module_config(r->server->module_config, &suphp_module);
/* We want to log output written to stderr */
ap_error_log2stderr(r->server);
/* prepare argv for new process */
argv = ap_palloc(p, 4 * sizeof(char *));
argv[0] = ap_pstrdup(p, conf->php_path);
argv[1] = "-s";
argv[2] = ap_pstrdup(p, r->filename);
argv[3] = NULL;
/* prepare environment */
env = ap_create_environment(p, empty_table);
/* We cannot use ap_call_exec because of the interference with suExec */
/* So we do everything ourselves */
/* mandatory cleanup before execution */
ap_cleanup_for_exec();
execve(ap_pstrdup(p, conf->php_path), argv, env);
/* We are still here? Okay - exec failed */
ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed",
conf->php_path);
exit(0);
/* NOT REACHED */
return (0);
}
apr_status_t proc_spawn_process(const char *cmdline, fcgid_proc_info *procinfo,
fcgid_procnode *procnode)
{
HANDLE *finish_event, listen_handle;
SECURITY_ATTRIBUTES SecurityAttributes;
fcgid_server_conf *sconf;
apr_procattr_t *proc_attr;
apr_status_t rv;
apr_file_t *file;
const char * const *proc_environ;
char sock_path[FCGID_PATH_MAX];
int argc;
char const * wargv[APACHE_ARG_MAX + 1], *word; /* For wrapper */
const char *tmp;
/* Build wrapper args */
argc = 0;
tmp = cmdline;
while (1) {
word = ap_getword_white(procnode->proc_pool, &tmp);
if (word == NULL || *word == '\0')
break;
if (argc >= APACHE_ARG_MAX)
break;
wargv[argc++] = word;
}
wargv[argc] = NULL;
memset(&SecurityAttributes, 0, sizeof(SecurityAttributes));
/* Prepare finish event */
finish_event = apr_palloc(procnode->proc_pool, sizeof(HANDLE));
*finish_event = CreateEvent(NULL, TRUE, FALSE, NULL);
if (*finish_event == NULL
|| !SetHandleInformation(*finish_event, HANDLE_FLAG_INHERIT, TRUE))
{
ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
procinfo->main_server,
"mod_fcgid: can't create mutex for subprocess");
return APR_ENOLOCK;
}
apr_pool_cleanup_register(procnode->proc_pool, finish_event,
close_finish_event, apr_pool_cleanup_null);
/* For proc_kill_gracefully() */
apr_pool_userdata_set(finish_event, FINISH_EVENT_DATA_NAME,
NULL, procnode->proc_pool);
/* Pass the finish event id to subprocess */
apr_table_setn(procinfo->proc_environ, SHUTDOWN_EVENT_NAME,
apr_ltoa(procnode->proc_pool, (long) *finish_event));
/* Prepare the listen namedpipe file name (no check for truncation) */
apr_snprintf(sock_path, sizeof sock_path,
"\\\\.\\pipe\\fcgidpipe-%lu.%d",
GetCurrentProcessId(), g_process_counter++);
/* Prepare the listen namedpipe handle */
SecurityAttributes.bInheritHandle = TRUE;
SecurityAttributes.nLength = sizeof(SecurityAttributes);
SecurityAttributes.lpSecurityDescriptor = NULL;
listen_handle = CreateNamedPipe(sock_path,
PIPE_ACCESS_DUPLEX,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
PIPE_WAIT, PIPE_UNLIMITED_INSTANCES,
8192, 8192, 0, &SecurityAttributes);
if (listen_handle == INVALID_HANDLE_VALUE) {
ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
procinfo->main_server,
"mod_fcgid: can't create namedpipe for subprocess");
return APR_ENOSOCKET;
}
apr_cpystrn(procnode->socket_path, sock_path, sizeof(procnode->socket_path));
apr_cpystrn(procnode->executable_path, wargv[0],
sizeof(procnode->executable_path));
/* Build environment variables */
proc_environ = (const char * const *)
ap_create_environment(procnode->proc_pool,
procinfo->proc_environ);
if (!proc_environ) {
ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
procinfo->main_server,
"mod_fcgid: can't build environment variables");
return APR_ENOMEM;
}
/* Create process now */
if ((rv = apr_procattr_create(&proc_attr, procnode->proc_pool))
!= APR_SUCCESS
|| (rv = apr_procattr_dir_set(proc_attr,
ap_make_dirstr_parent(procnode->proc_pool,
wargv[0]))) != APR_SUCCESS
|| (rv = apr_procattr_cmdtype_set(proc_attr, APR_PROGRAM))
!= APR_SUCCESS
|| (rv = apr_procattr_detach_set(proc_attr, 1)) != APR_SUCCESS
|| (rv = apr_procattr_io_set(proc_attr, APR_NO_PIPE,
APR_NO_FILE, APR_NO_FILE)) != APR_SUCCESS
|| (rv = apr_os_file_put(&file, &listen_handle, 0,
procnode->proc_pool)) != APR_SUCCESS
|| (rv = apr_procattr_child_in_set(proc_attr, file, NULL))
!= APR_SUCCESS)
{
ap_log_error(APLOG_MARK, APLOG_WARNING, rv, procinfo->main_server,
"mod_fcgid: can't create FastCGI process attribute");
CloseHandle(listen_handle);
return APR_ENOPROC;
}
/* fork and exec now */
rv = apr_proc_create(&(procnode->proc_id), wargv[0], wargv,
proc_environ,
proc_attr, procnode->proc_pool);
/* OK, I created the process, now put it back to idle list */
CloseHandle(listen_handle);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, procinfo->main_server,
"mod_fcgid: can't run %s", wargv[0]);
return rv;
}
/* FcgidWin32PreventOrphans feature */
sconf = ap_get_module_config(procinfo->main_server->module_config,
&fcgid_module);
if (sconf->hJobObjectForAutoCleanup != NULL) {
/* Associate cgi process to current process */
if (AssignProcessToJobObject(sconf->hJobObjectForAutoCleanup,
procnode->proc_id.hproc) == 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, apr_get_os_error(),
procinfo->main_server,
"mod_fcgid: unable to assign child process to "
"job object");
}
}
return APR_SUCCESS;
}
int suphp_child(void *rp, child_info *cinfo) {
request_rec *r = (request_rec *) rp;
core_dir_config *core_conf;
pool *p = r->main ? r->main->pool : r->pool;
char **argv, **env;
core_conf = (core_dir_config *) ap_get_module_config(
r->per_dir_config, &core_module);
/* We want to log output written to stderr */
ap_error_log2stderr(r->server);
/* prepare argv for new process */
argv = ap_palloc(p, 2 * sizeof(char *));
argv[0] = SUPHP_PATH_TO_SUPHP;
argv[1] = NULL;
/* prepare environment */
env = ap_create_environment(p, r->subprocess_env);
/* We cannot use ap_call_exec because of the interference with suExec */
/* So we do everything ourselves */
/* Set resource limits from core config */
#ifdef RLIMIT_CPU
if (core_conf->limit_cpu != NULL) {
if ((setrlimit(RLIMIT_CPU, core_conf->limit_cpu)) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, r->server,
"setrlimit: failed to set CPU usage limit");
}
}
#endif /* RLIMIT_CPU */
#ifdef RLIMIT_NPROC
if (core_conf->limit_nproc != NULL) {
if ((setrlimit(RLIMIT_NPROC, core_conf->limit_nproc)) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, r->server,
"setrlimit: failed to set process limit");
}
}
#endif /* RLIMIT_NPROC */
#ifdef RLIMIT_AS
if (core_conf->limit_mem != NULL) {
if ((setrlimit(RLIMIT_AS, core_conf->limit_mem)) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, r->server,
"setrlimit: failed to set memory limit");
}
}
#endif /* RLIMIT_VMEM */
#ifdef RLIMIT_DATA
if (core_conf->limit_mem != NULL) {
if ((setrlimit(RLIMIT_DATA, core_conf->limit_mem)) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, r->server,
"setrlimit: failed to set memory limit");
}
}
#endif /* RLIMIT_VMEM */
#ifdef RLIMIT_VMEM
if (core_conf->limit_mem != NULL) {
if ((setrlimit(RLIMIT_VMEM, core_conf->limit_mem)) != 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, r->server,
"setrlimit: failed to set memory limit");
}
}
#endif /* RLIMIT_VMEM */
/* mandatory cleanup before execution */
ap_cleanup_for_exec();
execve(SUPHP_PATH_TO_SUPHP, argv, env);
/* We are still here? Okay - exec failed */
ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed",
SUPHP_PATH_TO_SUPHP);
exit(0);
/* NOT REACHED */
return (0);
}
static apr_status_t run_cgi_child(apr_file_t **script_out,
apr_file_t **script_in,
apr_file_t **script_err,
const char *command,
const char * const argv[],
request_rec *r,
apr_pool_t *p,
cgi_exec_info_t *e_info)
{
const char * const *env;
apr_procattr_t *procattr;
apr_proc_t *procnew;
apr_status_t rc = APR_SUCCESS;
#if defined(RLIMIT_CPU) || defined(RLIMIT_NPROC) || \
defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined (RLIMIT_AS)
core_dir_config *conf = ap_get_module_config(r->per_dir_config,
&core_module);
#endif
#ifdef DEBUG_CGI
#ifdef OS2
/* Under OS/2 need to use device con. */
FILE *dbg = fopen("con", "w");
#else
FILE *dbg = fopen("/dev/tty", "w");
#endif
int i;
#endif
RAISE_SIGSTOP(CGI_CHILD);
#ifdef DEBUG_CGI
fprintf(dbg, "Attempting to exec %s as CGI child (argv0 = %s)\n",
r->filename, argv[0]);
#endif
env = (const char * const *)ap_create_environment(p, r->subprocess_env);
#ifdef DEBUG_CGI
fprintf(dbg, "Environment: \n");
for (i = 0; env[i]; ++i)
fprintf(dbg, "'%s'\n", env[i]);
#endif
/* Transmute ourselves into the script.
* NB only ISINDEX scripts get decoded arguments.
*/
if (((rc = apr_procattr_create(&procattr, p)) != APR_SUCCESS) ||
((rc = apr_procattr_io_set(procattr,
e_info->in_pipe,
e_info->out_pipe,
e_info->err_pipe)) != APR_SUCCESS) ||
((rc = apr_procattr_dir_set(procattr,
ap_make_dirstr_parent(r->pool,
r->filename))) != APR_SUCCESS) ||
#ifdef RLIMIT_CPU
((rc = apr_procattr_limit_set(procattr, APR_LIMIT_CPU,
conf->limit_cpu)) != APR_SUCCESS) ||
#endif
#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
((rc = apr_procattr_limit_set(procattr, APR_LIMIT_MEM,
conf->limit_mem)) != APR_SUCCESS) ||
#endif
#ifdef RLIMIT_NPROC
((rc = apr_procattr_limit_set(procattr, APR_LIMIT_NPROC,
conf->limit_nproc)) != APR_SUCCESS) ||
#endif
((rc = apr_procattr_cmdtype_set(procattr,
e_info->cmd_type)) != APR_SUCCESS) ||
((rc = apr_procattr_detach_set(procattr,
e_info->detached)) != APR_SUCCESS) ||
((rc = apr_procattr_addrspace_set(procattr,
e_info->addrspace)) != APR_SUCCESS) ||
((rc = apr_procattr_child_errfn_set(procattr, cgi_child_errfn)) != APR_SUCCESS)) {
/* Something bad happened, tell the world. */
ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, r,
"couldn't set child process attributes: %s", r->filename);
}
else {
procnew = apr_pcalloc(p, sizeof(*procnew));
rc = ap_os_create_privileged_process(r, procnew, command, argv, env,
procattr, p);
if (rc != APR_SUCCESS) {
/* Bad things happened. Everyone should have cleaned up. */
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_TOCLIENT, rc, r,
"couldn't create child process: %d: %s", rc,
apr_filepath_name_get(r->filename));
}
else {
apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
*script_in = procnew->out;
if (!*script_in)
return APR_EBADF;
apr_file_pipe_timeout_set(*script_in, r->server->timeout);
if (e_info->prog_type == RUN_AS_CGI) {
*script_out = procnew->in;
if (!*script_out)
return APR_EBADF;
apr_file_pipe_timeout_set(*script_out, r->server->timeout);
*script_err = procnew->err;
if (!*script_err)
return APR_EBADF;
apr_file_pipe_timeout_set(*script_err, r->server->timeout);
}
}
}
#ifdef DEBUG_CGI
fclose(dbg);
#endif
return (rc);
}
/* init_ext_filter_process: get the external filter process going
* This is per-filter-instance (i.e., per-request) initialization.
*/
static apr_status_t init_ext_filter_process(ap_filter_t *f)
{
ef_ctx_t *ctx = f->ctx;
apr_status_t rc;
ef_dir_t *dc = ctx->dc;
const char * const *env;
ctx->proc = apr_pcalloc(ctx->p, sizeof(*ctx->proc));
rc = apr_procattr_create(&ctx->procattr, ctx->p);
ap_assert(rc == APR_SUCCESS);
rc = apr_procattr_io_set(ctx->procattr,
APR_CHILD_BLOCK,
APR_CHILD_BLOCK,
APR_CHILD_BLOCK);
ap_assert(rc == APR_SUCCESS);
rc = set_resource_limits(f->r, ctx->procattr);
ap_assert(rc == APR_SUCCESS);
if (dc->log_stderr > 0) {
rc = apr_procattr_child_err_set(ctx->procattr,
f->r->server->error_log, /* stderr in child */
NULL);
ap_assert(rc == APR_SUCCESS);
}
rc = apr_procattr_child_errfn_set(ctx->procattr, child_errfn);
ap_assert(rc == APR_SUCCESS);
apr_pool_userdata_set(f->r, ERRFN_USERDATA_KEY, apr_pool_cleanup_null, ctx->p);
rc = apr_procattr_error_check_set(ctx->procattr, 1);
if (rc != APR_SUCCESS) {
return rc;
}
/* add standard CGI variables as well as DOCUMENT_URI, DOCUMENT_PATH_INFO,
* and QUERY_STRING_UNESCAPED
*/
ap_add_cgi_vars(f->r);
ap_add_common_vars(f->r);
apr_table_setn(f->r->subprocess_env, "DOCUMENT_URI", f->r->uri);
apr_table_setn(f->r->subprocess_env, "DOCUMENT_PATH_INFO", f->r->path_info);
if (f->r->args) {
/* QUERY_STRING is added by ap_add_cgi_vars */
char *arg_copy = apr_pstrdup(f->r->pool, f->r->args);
ap_unescape_url(arg_copy);
apr_table_setn(f->r->subprocess_env, "QUERY_STRING_UNESCAPED",
ap_escape_shell_cmd(f->r->pool, arg_copy));
}
env = (const char * const *) ap_create_environment(ctx->p,
f->r->subprocess_env);
rc = apr_proc_create(ctx->proc,
ctx->filter->command,
(const char * const *)ctx->filter->args,
env, /* environment */
ctx->procattr,
ctx->p);
if (rc != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rc, f->r,
"couldn't create child process to run `%s'",
ctx->filter->command);
return rc;
}
apr_pool_note_subprocess(ctx->p, ctx->proc, APR_KILL_AFTER_TIMEOUT);
/* We don't want the handle to the child's stdin inherited by any
* other processes created by httpd. Otherwise, when we close our
* handle, the child won't see EOF because another handle will still
* be open.
*/
apr_pool_cleanup_register(ctx->p, ctx->proc->in,
apr_pool_cleanup_null, /* other mechanism */
ef_close_file);
#if APR_FILES_AS_SOCKETS
{
apr_pollfd_t pfd = { 0 };
rc = apr_pollset_create(&ctx->pollset, 2, ctx->p, 0);
ap_assert(rc == APR_SUCCESS);
pfd.p = ctx->p;
pfd.desc_type = APR_POLL_FILE;
pfd.reqevents = APR_POLLOUT;
pfd.desc.f = ctx->proc->in;
rc = apr_pollset_add(ctx->pollset, &pfd);
ap_assert(rc == APR_SUCCESS);
pfd.reqevents = APR_POLLIN;
pfd.desc.f = ctx->proc->out;
rc = apr_pollset_add(ctx->pollset, &pfd);
ap_assert(rc == APR_SUCCESS);
}
#endif
return APR_SUCCESS;
}
/*
* ic_send_request()
* -----------------
* Send the client's page/form request to the Interchange server
*/
static int ic_send_request(request_rec *r,ic_conf_rec *conf_rec,BUFF *ic_buff)
{
char **env,**e,*rp;
int env_count,rc;
char request_uri[MAX_STRING_LEN];
char redirect_url[MAX_STRING_LEN];
/*
* send the Interchange-link arg parameter
* (this is always empty for a CGI request)
*/
ap_hard_timeout("ic_send_request",r);
if (ap_bputs("arg 0\n",ic_buff) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
ap_reset_timeout(r);
/*
* initialize the environment to send to Interchange
*/
ap_add_common_vars(r);
ap_add_cgi_vars(r);
env = ap_create_environment(r->pool,r->subprocess_env);
/*
* count the number of environment variables present
*/
for (e = env,env_count = 0; *e != NULL; e++,env_count++){
if (strncmp(*e,"PATH_INFO=",10) == 0)
env_count--;
}
env_count++;
/*
* send the environment variable count to Interchange
*/
if (ap_bprintf(ic_buff,"env %d\n",env_count) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
ap_reset_timeout(r);
/*
* ignore the PATH_INFO variable and fix the SCRIPT_NAME,
* REQUEST_URI and REDIRECT_URL variable content
*/
request_uri[0] = '\0';
redirect_url[0] = '\0';
for (e = env; *e != NULL; e++){
int len;
char tmp[MAX_STRING_LEN];
char *p = *e;
if (strncmp(p,"PATH_INFO=",10) == 0)
continue;
if (strncmp(p,"REDIRECT_URL=",13) == 0){
strncpy(redirect_url,p + 13,MAX_STRING_LEN - 14);
continue;
}
if (strncmp(p,"REQUEST_URI=",12) == 0)
strncpy(request_uri,p + 12,MAX_STRING_LEN - 13);
else if (strncmp(p,"SCRIPT_NAME=",12) == 0){
p = tmp;
strcpy(p,"SCRIPT_NAME=");
if (conf_rec->script_name[0])
strcat(p,conf_rec->script_name);
else{
strcat(p,"/");
strcat(p,conf_rec->location);
}
}
len = strlen(p);
if (len && ap_bprintf(ic_buff,"%d %s\n",len,p) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
}
rp = request_uri;
while (*rp == '/')
rp++;
/*
* strip the location path from the request_uri string
* unless the location is "/"
*/
if (conf_rec->location[0] != '\0'){
if (strncmp(rp,conf_rec->location,conf_rec->location_len) == 0)
rp += conf_rec->location_len;
}else{
if (rp != request_uri)
rp--;
}
strncpy(request_uri,rp,MAX_STRING_LEN - 1);
request_uri[MAX_STRING_LEN - 1] = '\0';
for (rp = request_uri; *rp != '\0'; rp++){
if (*rp == '?'){
*rp = '\0';
break;
}
}
switch (ap_unescape_url(request_uri)){
case BAD_REQUEST:
case NOT_FOUND:
ap_log_reason("Bad URI entities found",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
/*
* send the PATH_INFO variable as our "fixed" REQUEST_URI
*/
if (ap_bprintf(ic_buff,"%d PATH_INFO=%s\n",strlen(request_uri) + 10,request_uri) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
/*
* check if we have a REDIRECT_URL
* if so then give it the same "fixes" as PATH_INFO (REQUEST_URI)
*/
if (redirect_url[0] != '\0'){
rp = redirect_url;
while (*rp == '/')
rp++;
/*
* strip the location path from the request_uri string
* unless the location is "/"
*/
if (conf_rec->location[0] != '\0'){
if (strncmp(rp,conf_rec->location,conf_rec->location_len) == 0)
rp += conf_rec->location_len;
}else{
if (rp != redirect_url)
rp--;
}
strncpy(redirect_url,rp,MAX_STRING_LEN - 1);
redirect_url[MAX_STRING_LEN - 1] = '\0';
for (rp = redirect_url; *rp != '\0'; rp++){
if (*rp == '?'){
*rp = '\0';
break;
}
}
switch (ap_unescape_url(redirect_url)){
case BAD_REQUEST:
case NOT_FOUND:
ap_log_reason("Bad URI entities found",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
if (ap_bprintf(ic_buff,"%d REDIRECT_URL=%s\n",strlen(redirect_url) + 13,redirect_url) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
}
ap_reset_timeout(r);
/*
* send the request body, if any
*/
if (ap_should_client_block(r)){
char buffer[MAX_STRING_LEN];
int len_read;
long length = r->remaining;
if (ap_bprintf(ic_buff,"entity\n%ld ",length) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
/*
* read a block of data from the client and send
* it to the Interchange server, until there
* is nothing more to read from the client
*/
while ((len_read = ap_get_client_block(r,buffer,sizeof(buffer))) > 0){
ap_reset_timeout(r);
if (ap_bwrite(ic_buff,buffer,len_read) != len_read){
ap_log_reason("error writing client block to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
ap_reset_timeout(r);
}
if (len_read < 0){
ap_log_reason("error reading block from client",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
/*
* send an end of line character to Interchange
*/
if (ap_bputc('\n',ic_buff) < 0){
ap_log_reason("error writing to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
}
/*
* all data has been sent, so send the "end" marker
*/
ap_reset_timeout(r);
if (ap_bputs("end\n",ic_buff) < 0){
ap_log_reason("error writing the end marker to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
if (ap_bflush(ic_buff) < 0){
ap_log_reason("error flushing data to Interchange",r->uri,r);
return HTTP_INTERNAL_SERVER_ERROR;
}
ap_kill_timeout(r);
return OK;
}
/**
* Execute system command. First line of the output will be returned in
* the "output" parameter.
*/
int apache2_exec(modsec_rec *msr, const char *command, const char **argv, char **output) {
apr_procattr_t *procattr = NULL;
apr_proc_t *procnew = NULL;
apr_status_t rc = APR_SUCCESS;
const char *const *env = NULL;
apr_file_t *script_out = NULL;
request_rec *r = msr->r;
if (argv == NULL) {
argv = apr_pcalloc(r->pool, 3 * sizeof(char *));
argv[0] = command;
argv[1] = NULL;
}
ap_add_cgi_vars(r);
ap_add_common_vars(r);
/* PHP hack, getting around its silly security checks. */
apr_table_add(r->subprocess_env, "PATH_TRANSLATED", command);
apr_table_add(r->subprocess_env, "REDIRECT_STATUS", "302");
env = (const char * const *)ap_create_environment(r->pool, r->subprocess_env);
if (env == NULL) {
msr_log(msr, 1, "Exec: Unable to create environment.");
return -1;
}
procnew = apr_pcalloc(r->pool, sizeof(*procnew));
if (procnew == NULL) {
msr_log(msr, 1, "Exec: Unable to allocate %lu bytes.", (unsigned long)sizeof(*procnew));
return -1;
}
apr_procattr_create(&procattr, r->pool);
if (procattr == NULL) {
msr_log(msr, 1, "Exec: Unable to create procattr.");
return -1;
}
apr_procattr_io_set(procattr, APR_NO_PIPE, APR_FULL_BLOCK, APR_NO_PIPE);
apr_procattr_cmdtype_set(procattr, APR_SHELLCMD);
if (msr->txcfg->debuglog_level >= 9) {
msr_log(msr, 9, "Exec: %s", log_escape_nq(r->pool, command));
}
rc = apr_proc_create(procnew, command, argv, env, procattr, r->pool);
if (rc != APR_SUCCESS) {
msr_log(msr, 1, "Exec: Execution failed: %s (%s)", log_escape_nq(r->pool, command),
get_apr_error(r->pool, rc));
return -1;
}
apr_pool_note_subprocess(r->pool, procnew, APR_KILL_AFTER_TIMEOUT);
script_out = procnew->out;
if (!script_out) {
msr_log(msr, 1, "Exec: Failed to get script output pipe.");
return -1;
}
apr_file_pipe_timeout_set(script_out, r->server->timeout);
/* Now read from the pipe. */
{
char buf[260] = "";
char *p = buf;
apr_size_t nbytes = 255;
apr_status_t rc2;
rc2 = apr_file_read(script_out, buf, &nbytes);
if (rc2 == APR_SUCCESS) {
buf[nbytes] = 0;
/* if there is more than one line ignore them */
while(*p != 0) {
if (*p == 0x0a) *p = 0;
p++;
}
if (msr->txcfg->debuglog_level >= 4) {
msr_log(msr, 4, "Exec: First line from script output: \"%s\"",
log_escape(r->pool, buf));
}
if (output != NULL) *output = apr_pstrdup(r->pool, buf);
/* Soak up the remaining data. */
nbytes = 255;
while(apr_file_read(script_out, buf, &nbytes) == APR_SUCCESS) nbytes = 255;
} else {
msr_log(msr, 1, "Exec: Execution failed while reading output: %s (%s)",
log_escape_nq(r->pool, command),
get_apr_error(r->pool, rc2));
return -1;
}
}
apr_proc_wait(procnew, NULL, NULL, APR_WAIT);
return 1;
}
