From 3296c112b6f3cb45e195958c3e8ab8a533aaf35f Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Thu, 18 Jun 2009 20:54:10 +0000
Subject: Implement config for shared memory.

---
 module/mod_auth_singleid.c | 70 +++++++++++++++++++++++++++++-----------------
 1 file changed, 45 insertions(+), 25 deletions(-)

diff --git a/module/mod_auth_singleid.c b/module/mod_auth_singleid.c
index bdd8f6d..541ded1 100644
--- a/module/mod_auth_singleid.c
+++ b/module/mod_auth_singleid.c
@@ -96,10 +96,9 @@ typedef struct sid_context {
 
 static apr_global_mutex_t *shared_lock = NULL;
 static const char *shared_lock_name = NULL;
-static size_t shared_size = 64 * 1024;
 
 static int
-shared_initialize (apr_pool_t *p, server_rec *s)
+shared_initialize (apr_pool_t *p)
 {
 	apr_file_t *file = NULL;
 	char *lock_name = NULL;
@@ -112,7 +111,7 @@ shared_initialize (apr_pool_t *p, server_rec *s)
 
 	rc = apr_temp_dir_get (&tmpdir, p);
 	if (rc != APR_SUCCESS)
-		ap_log_error (APLOG_MARK, APLOG_ERR, rc, s,
+		ap_log_error (APLOG_MARK, APLOG_ERR, rc, NULL,
 		              "auth-singleid: couldn't get temporary directory");
 
 	if (rc == APR_SUCCESS) {
@@ -129,7 +128,7 @@ shared_initialize (apr_pool_t *p, server_rec *s)
 	if (rc == APR_SUCCESS) {
 		rc = apr_global_mutex_create (&shared_lock, lock_name, APR_LOCK_DEFAULT, p);
 		if (rc != APR_SUCCESS)
-			ap_log_error (APLOG_MARK, APLOG_ERR, rc, s,
+			ap_log_error (APLOG_MARK, APLOG_ERR, rc, NULL,
 			              "auth-singleid: couldn't create shared memory lock: %s", lock_name);
 	}
 
@@ -137,7 +136,7 @@ shared_initialize (apr_pool_t *p, server_rec *s)
 	if (rc == APR_SUCCESS) {
 		rc = unixd_set_global_mutex_perms (shared_lock);
 		if (rc != APR_SUCCESS)
-			ap_log_error (APLOG_MARK, APLOG_ERR, rc, s,
+			ap_log_error (APLOG_MARK, APLOG_ERR, rc, NULL,
 			              "auth-singleid: Could not set permissions on lock. "
 			              "check User and Group directives");
 	}
@@ -176,6 +175,8 @@ shared_create (apr_pool_t* p, size_t size)
 	void *addr;
 	int rc;
 
+	if (!shared_lock)
+		shared_initialize (p);
 	if (!shared_lock)
 		return NULL;
 
@@ -247,23 +248,9 @@ sid_shared_unlock (void)
 static void*
 dir_config_creator (apr_pool_t* p, char* dir)
 {
-	sid_context_t* ctx;
-	void *shared;
-
-	ctx = (sid_context_t*)apr_pcalloc(p, sizeof(*ctx));
-	memset(ctx, 0, sizeof(*ctx));
-
-	ctx->identifier = NULL;
-	ctx->store = NULL;
-	ctx->trust_root = NULL;
-
-	if (!dir)
-		return ctx;
-
-	shared = shared_create (p, shared_size);
-	ctx->store = sid_storage_initialize (shared, shared_size);
-
-	return ctx;
+	sid_context_t* ctx = apr_pcalloc (p, sizeof (*ctx));
+	memset (ctx, 0, sizeof (*ctx));
+  	return ctx;
 }
 
 static const char*
@@ -293,7 +280,7 @@ set_user_match (cmd_parms *cmd, void *config, const char *val)
 	while (isspace (*val))
 		++val;
 
-	if (strcmp (val, "suffix") == 0 && !isalpha (val[6])) {
+	if (strcasecmp (val, "suffix") == 0 && !isalpha (val[6])) {
 		ctx->user_match = SUFFIX;
 		return NULL;
 	}
@@ -307,11 +294,44 @@ set_user_match (cmd_parms *cmd, void *config, const char *val)
 	return NULL;
 }
 
+static const char*
+set_cache_size (cmd_parms *cmd, void *config, const char *val)
+{
+	sid_context_t *ctx = config;
+	char *end;
+	int size = 0;
+	void *shared;
+	size_t page;
+
+	if (strcasecmp (val, "on") == 0) {
+		size = 64 * 1024;
+	} else if (strcasecmp (val, "off") == 0) {
+		size = 0;
+	} else {
+		size = strtol (val, &end, 10);
+		if (*end != '\0')
+			return "Invalid number specified for SingleCache";
+	}
+
+	if (size == 0)
+		return NULL;
+
+	/* Align to a page size */
+	page = getpagesize ();
+	size = ((size + (page - 1)) / page) * page;
+
+	shared = shared_create (cmd->pool, size);
+	ctx->store = sid_storage_initialize (shared, size);
+	return NULL;
+}
+
 static const command_rec command_table[] = {
 	AP_INIT_TAKE1 ("SingleIdentifier", set_identifier, NULL, OR_AUTHCFG,
 	               "The OpenID identifier we should perform ID selection on when authenticating" ),
 	AP_INIT_TAKE1 ("SingleTrustRoot", set_trust_root, NULL, OR_AUTHCFG,
 	               "The OpenID trust root of this site."),
+	AP_INIT_TAKE1 ("SingleCache", set_cache_size, NULL, OR_AUTHCFG,
+	               "Enable and optionally set the size of the OpenID association cache"),
 	AP_INIT_RAW_ARGS ("SingleUserMatch", set_user_match, NULL, OR_AUTHCFG,
 	                 "How to convert an OpenID identifier into a user name" ),
 	{ NULL }
@@ -475,7 +495,7 @@ session_send_info (request_rec *r, sid_session_t *sess)
 static sid_session_t*
 session_copy_info (apr_pool_t *p, sid_session_t *sess)
 {
-	sid_session_t *copy = apr_palloc (p, sizeof (*sess));
+	sid_session_t *copy = apr_pcalloc (p, sizeof (*sess));
 	copy->expiry = sess->expiry;
 	copy->identifier = apr_pstrdup (p, sess->identifier);
 	return copy;
@@ -620,7 +640,7 @@ hook_initialize (apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec
 {
 	int rc;
 
-	rc = shared_initialize (p, s);
+	rc = shared_initialize (p);
 	if (rc != OK)
 		return rc;
 
-- 
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