update

content/kamailio/_index.md

@@ -13,4 +13,8 @@ toc: true
 # 文章列表
 
 - 1. 文档
-    - [第一节 如何熟悉Kamailio文档的文档结构](/kamailio/docs-index)
+    - [熟悉Kamailio文档的文档结构](/kamailio/docs-index)
+    - [路由执行顺序](./msg-flow/)
+    - [kamailio 启动参数控制](./kamailio-cli-params)
+    - [DMQ模块源码学习笔记](./dmq-note)
+    - [源码笔记 - 自定义事件路由(上)](./customer-event-route)

content/kamailio/route-list-action/index.md

@@ -0,0 +1,174 @@
+---
+title: "源码笔记 - 自定义事件路由(中)"
+date: "2024-12-28 09:43:00"
+draft: false
+type: posts
+tags:
+- all
+categories:
+- all
+---
+
+
+
+[[_TOC_]]
+
+
+
+# route_list
+
+route.h定义了几个函数分别用来获取、查找、新增route
+
+```c
+// src/core/route.h
+int route_get(struct route_list *rt, char *name);
+int route_lookup(struct route_list *rt, char *name);
+void push(struct action *a, struct action **head);
+
+struct route_list
+{
+	struct action **rlist;
+	int idx;					 /* first empty entry */
+	int entries;				 /* total number of entries */
+	struct str_hash_table names; /* name to route index mappings */
+};
+```
+
+
+
+## rlist
+
+我们对route_list数据模型进行简化:
+
+rlist是一个固定长度的一维数组，通过索引来访问对应的值。如果数组的空间不足，那么就创建一个两倍大的空数据，然后先把原始数据复制过去。这种复制方式保持的原始数据的索引位置。有点像golang的切片扩容机制。
+
+这里最为重要的就是保持数组元素的索引位置在扩容后不变。
+
+```c
+static inline int route_new_list(struct route_list *rt)
+{
+	int ret;
+	struct action **tmp;
+
+	ret = -1;
+	if(rt->idx >= rt->entries) {
+    // 两倍扩容
+		tmp = pkg_realloc(rt->rlist, 2 * rt->entries * sizeof(struct action *));
+		if(tmp == 0) {
+			LM_CRIT("out of memory\n");
+			goto end;
+		}
+		/* init the newly allocated memory chunk */
+		memset(&tmp[rt->entries], 0, rt->entries * sizeof(struct action *));
+		rt->rlist = tmp;
+		rt->entries *= 2;
+	}
+	if(rt->idx < rt->entries) {
+		ret = rt->idx;
+		rt->idx++;
+	}
+end:
+	return ret;
+}
+```
+
+
+
+## str_hash_table
+
+我们对hash_table的数据模型进行简化，它其实就是一hash表，key是路由的名，值是一个正数，正数代表了路由执行单元的索引位置。
+
+
+
+如果我们用js对route_list来表示
+
+1. dispatcher:dst-down对应的是索引0
+2. 索引0在rlist里对应的是func1
+3. dispatcher:dst-down事件发生后，调用func1
+
+```js
+let rlist = [func1, func2, func3]
+let names = {
+  'dispatcher:dst-down': 0,
+  'rtpengine:dtmf-event': 1
+}
+```
+
+其实这里完全可以不用数组，如果在js里,  可以直接用函数作为hash的key
+
+```js
+let names = {
+  'dispatcher:dst-down': func1,
+  'rtpengine:dtmf-event': func2
+}
+```
+
+
+
+## action
+
+```c
+// src/core/route_struct.h
+struct action
+{
+	int cline;
+	char *cfile;
+	char *rname;
+	enum action_type type; /* forward, drop, log, send ...*/
+	int count;
+	struct action *next;
+	action_u_t val[MAX_ACTIONS];
+};
+```
+
+
+
+## str_hash_table
+
+```c
+struct str_hash_table
+{
+	struct str_hash_head *table;
+	int size;
+};
+
+struct str_hash_head
+{
+	struct str_hash_entry *next;
+	struct str_hash_entry *prev;
+};
+
+struct str_hash_entry
+{
+	struct str_hash_entry *next;
+	struct str_hash_entry *prev;
+	str key;
+	unsigned int flags;
+	union
+	{
+		void *p;
+		char *s;
+		int n;
+		char data[sizeof(void *)];
+	} u;
+};
+```
+
+
+
+
+
+在src/core/route.c中定义如下几个变量，分别管理着6钟不同的路由。
+
+```c
+// src/core/route.c
+/* main routing script table  */
+struct route_list main_rt; 
+struct route_list onreply_rt;
+struct route_list failure_rt;
+struct route_list branch_rt;
+struct route_list onsend_rt;
+struct route_list event_rt;
+```
+
+

content/posts/2022/05/02-hugo-add-mermaid.md

@@ -9,58 +9,47 @@ categories:
 - hugo
 ---
 
-# 增加mermaid shortcodes
+# step1
 
-在themes/YourTheme/layouts/shortcodes/mermaid.html 增加如下内容
+在themes/YourTheme/layouts/partials/footer.html 的最后追加如下内容
 
 ```html
-
-<script async type="application/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/dist/mermaid.min.js">
-    var config = {
-      startOnLoad:true,
-      theme:'{{ if .Get "theme" }}{{ .Get "theme" }}{{ else }}dark{{ end }}',
-      align:'{{ if .Get "align" }}{{ .Get "align" }}{{ else }}center{{ end }}'
-    };
-    mermaid.initialize(config);
+{{if .Store.Get "hasMermaid" }}
+  <script type="module">
+    import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.esm.min.mjs';
+    mermaid.initialize({ startOnLoad: true });
   </script>
-  
-  <div class="mermaid">
-    {{.Inner}}
-  </div>
+{{end }}
+```
+
+# step2:
 
+在layouts/_default/_markup/render-codeblock-mermaid.html
+
+```html
+<pre class="mermaid">
+    {{- .Inner | htmlEscape | safeHTML }}
+</pre>
+{{ .Page.Store.Set "hasMermaid" true }}
 ```
 
 # 在blog中增加如下代码
 
-{{< notice warning >}}
-注意下面的代码，你在实际写的时候，要把 /* 和 */ 删除
-{{< /notice >}}
 
-```go
-{{/*< mermaid align="left" theme="neutral" */>}}
+```mermaid
 pie
     title French Words I Know
     "Merde" : 50
     "Oui" : 35
     "Alors" : 10
     "Non" : 5
-{{/*< /mermaid >*/}}
 ```
 
-{{< mermaid align="left" theme="neutral" >}}
-pie
-    title French Words I Know
-    "Merde" : 50
-    "Oui" : 35
-    "Alors" : 10
-    "Non" : 5
-{{< /mermaid >}}
-
-{{< mermaid align="left" theme="neutral" >}}
+```mermaid
 sequenceDiagram
     title French Words I Know
     autonumber
     Alice->>Bob: hello
     Bob-->>Alice: hi
     Alice->Bob: talking
-{{< /mermaid >}}
+```

layouts/_default/_markup/render-codeblock-mermaid.html

@@ -0,0 +1,4 @@
+<pre class="mermaid">
+    {{- .Inner | htmlEscape | safeHTML }}
+</pre>
+{{ .Page.Store.Set "hasMermaid" true }}

themes/PaperMod/layouts/partials/footer.html

@@ -133,3 +133,10 @@
     });
 </script>
 {{- end }}
+
+{{if .Store.Get "hasMermaid" }}
+  <script type="module">
+    import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.esm.min.mjs';
+    mermaid.initialize({ startOnLoad: true });
+  </script>
+{{end }}