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# 1. 记BFCP解析库confiance-v7bfcp-only-05中踩过的坑

在开发sip呼叫辅流的过程中使用了一个bfcp的解析库：
[confiance-v7bfcp-only-05](https://sourceforge.net/projects/confiance/)。

然而在使用过程中发现这个解析库的一些缺陷，列举如下：

## 1.1. `SUPPORTED-PRIMITIVES` 和 `SUPPORTED-ATTRIBUTES` 的字节长度问题
原始库中对这两个字段的处理都是采用的`unsigned short int`存储到网络交互字节中，
根据  
[RFC4582 5.2.10.  SUPPORTED-ATTRIBUTES](https://tools.ietf.org/html/rfc4582#section-5.2.10) 和  
[RFC4582 5.2.11.  SUPPORTED-PRIMITIVES](https://tools.ietf.org/html/rfc4582#section-5.2.11) 的描述，这两个字段都是占用1个字节的。

0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |0 0 0 1 0 1 0|M|    Length     | Supp. Attr. |R| Supp. Attr. |R|
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | Supp. Attr. |R| Supp. Attr. |R| Supp. Attr. |R| Supp. Attr. |R|
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                                                               |
     /                                                               /
     /                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                               |            Padding            |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Figure 17: SUPPORTED-ATTRIBUTES format

0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |0 0 0 1 0 1 1|M|    Length     |   Primitive   |   Primitive   |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |   Primitive   |   Primitive   |   Primitive   |   Primitive   |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                                                               |
     /                                                               /
     /                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                               |            Padding            |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Figure 18: SUPPORTED-PRIMITIVES format

## 1.2. Payload Length 的字节长度及单位问题

根据 [RFC4582 5.1.  COMMON-HEADER Format](https://tools.ietf.org/html/rfc4582#section-5.1) 描述
> Payload Length: This 16-bit field contains the length of the message in 4-octet units, excluding the common header

由于bfcp要求网络交互字节块必须要以4字节对齐，凡是不足4字节的都需要填充。因此称为`in 4-octet units`，

*`octet` 是指八个比特（bit）为一组的单位，通常是指一个字节（byte）的意思。*

也就是说使用抓包工具查看bfcp的package时，Payload Length字段显示的值应该为整个BFCP包的长度减去BFCP通用头长度再除以4（即 `(BFCPPackageLength - 12) / 4`）；相反的，在解析bfcp的package时也要根据Payload Length字段的值乘以4再加上通用头长度即为整个包的长度（即 `PayloadLength * 4 + 12`） ，且应该对负载长度以4求余来校验字节块是否满足这一条件。

但原始库中对于这块的处理是有问题的，包括判断逻辑也有问题。

## 1.3. 关于va_arg的错误使用
在修改中引入了的这个问题，linux上使用解析库时引发异常

在使用 `va_arg` 时传入的可变参数会经历 `默认参数提升` 的隐式转换过程，因此在使用过程中ap的下一个参数类型不应该指定为以下类型：

`char` / `signed char` / `unsigned char`  
`short` / `signed short` / `unsigned short`  
`short int` / `signed short int` / `unsigned short int`

有关c语言 [默认参数提升](https://zh.cppreference.com/w/c/language/conversion#.E9.BB.98.E8.AE.A4.E5.8F.82.E6.95.B0.E6.8F.90.E5.8D.87) 的规则描述如下：

> **默认参数提升**  
  在函数调用表达式中，当调用下列函数时  
    &emsp;&emsp;1) 无原型函数  
    &emsp;&emsp;2) 变参数函数，其中参数表达式是匹配省略号参数的尾随参数之一  
  每个整数类型的参数都会经历整数提升（见后述），而每个 `float` 类型参数都隐式转换为 `double` 类型

> **整数提升**  
整数提升是任何等级小于或等于 `int` 等级的整数类型，或是 _Bool 、 signed int 、 unsigned int 类型的位域类型的值到 `int` 或 `unsigned int` 类型值的隐式转换。  
若 `int` 能表示原类型的整个值域（或原位域的值域），则值转换成 `int` 类型。否则值转化成 `unsigned int` 类型。  
整数提升保持值，包含符号：

更详细的信息可参考：[可变长参数列表误区与陷阱——va_arg不可接受的类型](http://www.cppblog.com/ownwaterloo/archive/2009/04/21/unacceptable_type_in_va_arg.html)

## 1.4. 修改清单
详情参考：[fix confiance-v7bfcp-only-05](https://github.com/tangm421/confiance-v7bfcp-only-05/commit/ddb84a2a827dac6027a034b8fe10f6b4b64086b0)

左侧文件： 原始文件

右侧文件： 修改后

### 1.4.1. bfcp_messages.h

<table class="fc" cellspacing="0" cellpadding="0">
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">111</td>
<td class="TextItemSame">typedef struct bfcp_floor_id_list { /* FLOOR-ID list, to manage the multiple FLOOR-ID attributes */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">111</td>
<td class="TextItemSame">typedef struct bfcp_floor_id_list { /* FLOOR-ID list, to manage the multiple FLOOR-ID attributes */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">112</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int ID;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; /* FLOOR-ID */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">112</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int ID;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; /* FLOOR-ID */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">113</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; struct bfcp_floor_id_list *next;&nbsp; &nbsp; /* Pointer to next FLOOR-ID instance */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">113</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; struct bfcp_floor_id_list *next;&nbsp; &nbsp; /* Pointer to next FLOOR-ID instance */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">114</td>
<td class="TextItemSame">} bfcp_floor_id_list;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">114</td>
<td class="TextItemSame">} bfcp_floor_id_list;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">115</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">115</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">116</td>
<td class="TextItemSame">typedef struct bfcp_supported_list {&nbsp; &nbsp; /* list to manage all the supported attributes and primitives */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">116</td>
<td class="TextItemSame">typedef struct bfcp_supported_list {&nbsp; &nbsp; /* list to manage all the supported attributes and primitives */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">117</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; unsigned short int element;&nbsp; &nbsp;&nbsp; /* Element (Attribute/Primitive) */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">117</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; unsigned char element;&nbsp; &nbsp; &nbsp; /* Element (Attribute/Primitive) */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">118</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; struct bfcp_supported_list *next;&nbsp;&nbsp; /* Pointer to next supported element instance */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">118</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; struct bfcp_supported_list *next;&nbsp;&nbsp; /* Pointer to next supported element instance */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">119</td>
<td class="TextItemSame">} bfcp_supported_list;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">119</td>
<td class="TextItemSame">} bfcp_supported_list;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">120</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">120</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">121</td>
<td class="TextItemSame">typedef struct bfcp_request_status {</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">121</td>
<td class="TextItemSame">typedef struct bfcp_request_status {</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">122</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int rs;&nbsp; /* Request Status */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">122</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int rs;&nbsp; /* Request Status */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">123</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int qp;&nbsp; /* Queue Position */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">123</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int qp;&nbsp; /* Queue Position */</td>
</tr>
<tr class="SectionGap"><td colspan="5">&nbsp;</td></tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">243</td>
<td class="TextItemSame">/* Add IDs to an existing Floor ID list (last argument MUST be 0) */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">243</td>
<td class="TextItemSame">/* Add IDs to an existing Floor ID list (last argument MUST be 0) */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">244</td>
<td class="TextItemSame">int bfcp_add_floor_id_list(bfcp_floor_id_list *list, unsigned short int fID, ...);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">244</td>
<td class="TextItemSame">int bfcp_add_floor_id_list(bfcp_floor_id_list *list, unsigned short int fID, ...);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">245</td>
<td class="TextItemSame">/* Free a Floor ID list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">245</td>
<td class="TextItemSame">/* Free a Floor ID list */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">246</td>
<td class="TextItemSame">int bfcp_free_floor_id_list(bfcp_floor_id_list *list);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">246</td>
<td class="TextItemSame">int bfcp_free_floor_id_list(bfcp_floor_id_list *list);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">247</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">247</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">248</td>
<td class="TextItemSame">/* Create a new Supported (Primitives/Attributes) list (last argument MUST be 0) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">248</td>
<td class="TextItemSame">/* Create a new Supported (Primitives/Attributes) list (last argument MUST be 0) */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">249</td>
<td class="TextItemSigDiffMod">bfcp_supported_list *bfcp_new_supported_list(unsigned short int element, ...);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">249</td>
<td class="TextItemSigDiffMod">bfcp_supported_list *bfcp_new_supported_list(unsigned char element, ...);</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">250</td>
<td class="TextItemSame">/* Free a Supported (Primitives/Attributes) list */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">250</td>
<td class="TextItemSame">/* Free a Supported (Primitives/Attributes) list */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">251</td>
<td class="TextItemSame">int bfcp_free_supported_list(bfcp_supported_list *list);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">251</td>
<td class="TextItemSame">int bfcp_free_supported_list(bfcp_supported_list *list);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">252</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">252</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">253</td>
<td class="TextItemSame">/* Create a New Request Status (RequestStatus/QueuePosition) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">253</td>
<td class="TextItemSame">/* Create a New Request Status (RequestStatus/QueuePosition) */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">254</td>
<td class="TextItemSame">bfcp_request_status *bfcp_new_request_status(unsigned short int rs, unsigned short int qp);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">254</td>
<td class="TextItemSame">bfcp_request_status *bfcp_new_request_status(unsigned short int rs, unsigned short int qp);</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">255</td>
<td class="TextItemSame">/* Free a Request Status (RequestStatus/QueuePosition) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">255</td>
<td class="TextItemSame">/* Free a Request Status (RequestStatus/QueuePosition) */</td>
</tr>
</table>

### 1.4.2. bfcp_messages.c

<table class="fc" cellspacing="0" cellpadding="0">
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">195</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = next;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">195</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">196</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">196</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">197</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return 0;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">197</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return 0;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">198</td>
<td class="TextItemSame">}</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">198</td>
<td class="TextItemSame">}</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">199</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">199</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">200</td>
<td class="TextItemSame">/* Create a new Supported (Primitives/Attributes) list (last argument MUST be 0) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">200</td>
<td class="TextItemSame">/* Create a new Supported (Primitives/Attributes) list (last argument MUST be 0) */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">201</td>
<td class="TextItemSigDiffMod">bfcp_supported_list *bfcp_new_supported_list(unsigned short int element, ...)</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">201</td>
<td class="TextItemSigDiffMod">bfcp_supported_list *bfcp_new_supported_list(unsigned char element, ...)</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">202</td>
<td class="TextItemSame">{</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">202</td>
<td class="TextItemSame">{</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">203</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">203</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">204</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_list ap;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">204</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_list ap;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">205</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_start(ap, element);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">205</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_start(ap, element);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">206</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">206</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">207</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* We could not allocate the memory, return a with failure */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">207</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* We could not allocate the memory, return a with failure */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">208</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">208</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">209</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first-&gt;element = element;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">209</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first-&gt;element = element;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">210</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">210</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">211</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; element = va_arg(ap, int);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">211</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; element = (unsigned char)va_arg(ap, int);</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">212</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(element) {</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">212</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(element) {</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">213</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">213</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">214</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* We could not allocate the memory, return a with failure */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">214</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* We could not allocate the memory, return a with failure */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">215</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">215</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">216</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = element;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">216</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = element;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">217</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">217</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">218</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">218</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">219</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; element = va_arg(ap, int);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">219</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; element = (unsigned char)va_arg(ap, int);</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">220</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">220</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">221</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_end(ap);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">221</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; va_end(ap);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">222</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">222</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">223</td>
<td class="TextItemSame">}</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">223</td>
<td class="TextItemSame">}</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">224</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">224</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">225</td>
<td class="TextItemSame">/* Free a Supported (Primitives/Attributes) list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">225</td>
<td class="TextItemSame">/* Free a Supported (Primitives/Attributes) list */</td>
</tr>
</table>

### 1.4.3. bfcp_messages_build.c

<table class="fc" cellspacing="0" cellpadding="0">
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">45</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned int ch32;&nbsp; &nbsp; &nbsp; /* 32 bits */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">45</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned int ch32;&nbsp; &nbsp; &nbsp; /* 32 bits */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">46</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">46</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">47</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">47</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">48</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = (((ch32 &amp; !(0xE0000000)) | (1)) &lt;&lt; 29) +&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /* First the Version (3 bits, set to 001) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">48</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = (((ch32 &amp; !(0xE0000000)) | (1)) &lt;&lt; 29) +&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /* First the Version (3 bits, set to 001) */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">49</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; (((ch32 &amp; !(0x1F000000)) | (0)) &lt;&lt; 24) +&nbsp; &nbsp; &nbsp; &nbsp; /* then the Reserved (5 bits, ignored) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">49</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; (((ch32 &amp; !(0x1F000000)) | (0)) &lt;&lt; 24) +&nbsp; &nbsp; &nbsp; &nbsp; /* then the Reserved (5 bits, ignored) */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">50</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; (((ch32 &amp; !(0x00FF0000)) | (primitive)) &lt;&lt; 16) +&nbsp; &nbsp; /* the Primitive (8 bits) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">50</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; (((ch32 &amp; !(0x00FF0000)) | (primitive)) &lt;&lt; 16) +&nbsp; &nbsp; /* the Primitive (8 bits) */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">51</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; ((ch32 &amp; !(0x0000FFFF)) | (message-&gt;length - 12));&nbsp; /* and the payload length (16 bits) */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">51</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; ((ch32 &amp; !(0x0000FFFF)) | ((message-&gt;length - 12) / 4));&nbsp; &nbsp; /* and the payload length (16 bits), contains the length of the message in 4-octet units */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">52</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = htonl(ch32);&nbsp; &nbsp;&nbsp; /* We want all protocol values in network-byte-order */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">52</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = htonl(ch32);&nbsp; &nbsp;&nbsp; /* We want all protocol values in network-byte-order */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">53</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; memcpy(buffer, &amp;ch32, 4);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">53</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; memcpy(buffer, &amp;ch32, 4);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">54</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; buffer = buffer+4;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">54</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; buffer = buffer+4;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">55</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = htonl(entity-&gt;conferenceID);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">55</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; ch32 = htonl(entity-&gt;conferenceID);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">56</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; memcpy(buffer, &amp;ch32, 4);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">56</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; memcpy(buffer, &amp;ch32, 4);</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">57</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; buffer = buffer+4;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">57</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; buffer = buffer+4;</td>
</tr>
<tr class="SectionGap"><td colspan="5">&nbsp;</td></tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">497</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!attributes) /* The supported attributes list is empty, return with a failure */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">497</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!attributes) /* The supported attributes list is empty, return with a failure */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">498</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return -1;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">498</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return -1;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">499</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int attrlen = 2;&nbsp; &nbsp; /* The Lenght of the attribute (starting from the TLV) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">499</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int attrlen = 2;&nbsp; &nbsp; /* The Lenght of the attribute (starting from the TLV) */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">500</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int padding = 0;&nbsp; &nbsp; /* Number of bytes of padding */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">500</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int padding = 0;&nbsp; &nbsp; /* Number of bytes of padding */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">501</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int position = message-&gt;position;&nbsp; &nbsp; &nbsp;&nbsp; /* We keep track of where the TLV will have to be */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">501</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int position = message-&gt;position;&nbsp; &nbsp; &nbsp;&nbsp; /* We keep track of where the TLV will have to be */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">502</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+(message-&gt;position)+2;&nbsp; /* We skip the TLV bytes */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">502</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+(message-&gt;position)+2;&nbsp; /* We skip the TLV bytes */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">503</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
<td class="AlignCenter">+-</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">504</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *temp = attributes;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">503</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *temp = attributes;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">505</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(temp) {&nbsp;&nbsp; /* Fill all supported attributes */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">504</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(temp) {&nbsp;&nbsp; /* Fill all supported attributes */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">506</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; ch16 = htons(temp-&gt;element);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">505</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; unsigned char ch = temp-&gt;element;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">507</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memcpy(buffer, &amp;ch16, 2);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">506</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; buffer[0] = ch &lt;&lt; 1;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">508</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+2;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">507</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+1;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">509</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; attrlen = attrlen+2;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">508</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; attrlen = attrlen+1;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">510</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = temp-&gt;next;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">509</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = temp-&gt;next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">511</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">510</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">512</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((attrlen%4) != 0) {&nbsp; &nbsp; &nbsp; /* We need padding */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">511</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((attrlen%4) != 0) {&nbsp; &nbsp; &nbsp; /* We need padding */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">513</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; padding = 4-(attrlen%4);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">512</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; padding = 4-(attrlen%4);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">514</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memset(buffer, 0, padding);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">513</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memset(buffer, 0, padding);</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">515</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">514</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionGap"><td colspan="5">&nbsp;</td></tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">524</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!primitives) /* The supported attributes list is empty, return with a failure */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">523</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!primitives) /* The supported attributes list is empty, return with a failure */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">525</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return -1;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">524</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return -1;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">526</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int attrlen = 2;&nbsp; &nbsp; /* The Lenght of the attribute (starting from the TLV) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">525</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int attrlen = 2;&nbsp; &nbsp; /* The Lenght of the attribute (starting from the TLV) */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">527</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int padding = 0;&nbsp; &nbsp; /* Number of bytes of padding */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">526</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int padding = 0;&nbsp; &nbsp; /* Number of bytes of padding */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">528</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int position = message-&gt;position;&nbsp; &nbsp; &nbsp;&nbsp; /* We keep track of where the TLV will have to be */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">527</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int position = message-&gt;position;&nbsp; &nbsp; &nbsp;&nbsp; /* We keep track of where the TLV will have to be */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">529</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+(message-&gt;position)+2;&nbsp; /* We skip the TLV bytes */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">528</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+(message-&gt;position)+2;&nbsp; /* We skip the TLV bytes */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">530</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
<td class="AlignCenter">+-</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">531</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *temp = primitives;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">529</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *temp = primitives;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">532</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(temp) {&nbsp;&nbsp; /* Fill all supported primitives */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">530</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; while(temp) {&nbsp;&nbsp; /* Fill all supported primitives */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">533</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; ch16 = htons(temp-&gt;element);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">531</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; unsigned char ch = temp-&gt;element;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">534</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memcpy(buffer, &amp;ch16, 2);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">532</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memcpy(buffer, &amp;ch, 1);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">535</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+2;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">533</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+1;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">536</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; attrlen = attrlen+2;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">534</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; attrlen = attrlen+1;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">537</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = temp-&gt;next;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">535</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; temp = temp-&gt;next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">538</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">536</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">539</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((attrlen%4) != 0) {&nbsp; &nbsp; &nbsp; /* We need padding */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">537</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((attrlen%4) != 0) {&nbsp; &nbsp; &nbsp; /* We need padding */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">540</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; padding = 4-(attrlen%4);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">538</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; padding = 4-(attrlen%4);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">541</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memset(buffer, 0, padding);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">539</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; memset(buffer, 0, padding);</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">542</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">540</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
</table>

### 1.4.4. bfcp_messages_parse.c

<table class="fc" cellspacing="0" cellpadding="0">
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">190</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((recvM-&gt;reserved) != 0) {&nbsp; &nbsp; /* Reserved bits are not 0, return with an error */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">190</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if((recvM-&gt;reserved) != 0) {&nbsp; &nbsp; /* Reserved bits are not 0, return with an error */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">191</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; recvM-&gt;errors = bfcp_received_message_add_error(recvM-&gt;errors, 0, BFCP_RESERVED_NOT_ZERO);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">191</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; recvM-&gt;errors = bfcp_received_message_add_error(recvM-&gt;errors, 0, BFCP_RESERVED_NOT_ZERO);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">192</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!(recvM-&gt;errors))</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">192</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!(recvM-&gt;errors))</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">193</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* An error occurred while recording the error, return with failure */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">193</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* An error occurred while recording the error, return with failure */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">194</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">194</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">195</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; recvM-&gt;primitive = ((ch32 &amp; 0x00FF0000) &gt;&gt; 16); /* Primitive identifier */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">195</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; recvM-&gt;primitive = ((ch32 &amp; 0x00FF0000) &gt;&gt; 16); /* Primitive identifier */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">196</td>
<td class="TextItemInsigRightMod">&nbsp;&nbsp;&nbsp; /* cause the Payload Lenght contains the length of the message in 4-octet units, here we need to multiple with 4 */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">196</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; recvM-&gt;length = (ch32 &amp; 0x0000FFFF) + 12;&nbsp;&nbsp; /* Payload Lenght of the message + 12 (Common Header) */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">197</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; recvM-&gt;length = (ch32 &amp; 0x0000FFFF) * 4 + 12;&nbsp;&nbsp; /* Payload Lenght of the message + 12 (Common Header) */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">197</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; if(((recvM-&gt;length) != message-&gt;length) || !(recvM-&gt;length)%4) {&nbsp; &nbsp; /* The message length is wrong */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">198</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; if((recvM-&gt;length != message-&gt;length) || (recvM-&gt;length % 4)) { /* The message length is wrong */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">198</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /* Either the length in the header is different from the length of the buffer... */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">199</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /* Either the length in the header is different from the length of the buffer... */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">199</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /*&nbsp;&nbsp; ...or the length is not a multiple of 4, meaning it's surely not aligned */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">200</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; /*&nbsp;&nbsp; ...or the length is not a multiple of 4, meaning it's surely not aligned */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">200</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; recvM-&gt;errors = bfcp_received_message_add_error(recvM-&gt;errors, 0, BFCP_WRONG_LENGTH);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">201</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; recvM-&gt;errors = bfcp_received_message_add_error(recvM-&gt;errors, 0, BFCP_WRONG_LENGTH);</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">201</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!(recvM-&gt;errors))</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">202</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; if(!(recvM-&gt;errors))</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">202</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* An error occurred while recording the error, return with failure */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">203</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* An error occurred while recording the error, return with failure */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">203</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">204</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionGap"><td colspan="5">&nbsp;</td></tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">621</td>
<td class="TextItemSame">bfcp_supported_list *bfcp_parse_attribute_SUPPORTED_ATTRIBUTES(bfcp_message *message, bfcp_received_attribute *recvA)</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">622</td>
<td class="TextItemSame">bfcp_supported_list *bfcp_parse_attribute_SUPPORTED_ATTRIBUTES(bfcp_message *message, bfcp_received_attribute *recvA)</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">622</td>
<td class="TextItemSame">{</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">623</td>
<td class="TextItemSame">{</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">623</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(recvA-&gt;length&lt;3) /* The length of this attribute is wrong */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">624</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(recvA-&gt;length&lt;3) /* The length of this attribute is wrong */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">624</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">625</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">625</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int i;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">626</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int i;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">626</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">627</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">627</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
<td class="AlignCenter">+-</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">628</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+recvA-&gt;position+2;&nbsp; /* Skip the Header */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">628</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+recvA-&gt;position+2;&nbsp; /* Skip the Header */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">629</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; int number = (recvA-&gt;length-2)/2;&nbsp;&nbsp; /* Each supported attribute takes 2 bytes */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">629</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; int number = (recvA-&gt;length-2); /* Each supported attribute takes 1 bytes */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">630</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!number)</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">630</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!number)</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">631</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* No supported attributes? */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">631</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* No supported attributes? */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">632</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">632</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">633</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">633</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">634</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">634</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">635</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; memcpy(&amp;ch16, buffer, 2);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">636</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; first-&gt;element = ntohs(ch16);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">635</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; first-&gt;element = buffer[0] &amp; 0xFE;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">637</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">636</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">638</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(number&gt;1) {&nbsp; &nbsp; &nbsp; /* Let's parse each other supported attribute we find */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">637</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(number&gt;1) {&nbsp; &nbsp; &nbsp; /* Let's parse each other supported attribute we find */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">639</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; for(i = 1;i&lt;number;i++) {</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">638</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; for(i = 1;i&lt;number;i++) {</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">640</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">639</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">641</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">640</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">642</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">641</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">643</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+2;&nbsp; /* Skip to the next supported attribute */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">642</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer + 1;&nbsp; &nbsp; /* Skip to the next supported attribute */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">644</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; memcpy(&amp;ch16, buffer, 2);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">643</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = buffer[0] &amp; 0xFE;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">645</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = ntohs(ch16);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">646</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">644</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">647</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">645</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">648</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">646</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">649</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">647</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">650</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">648</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">651</td>
<td class="TextItemSame">}</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">649</td>
<td class="TextItemSame">}</td>
</tr>
<tr class="SectionGap"><td colspan="5">&nbsp;</td></tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">653</td>
<td class="TextItemSame">bfcp_supported_list *bfcp_parse_attribute_SUPPORTED_PRIMITIVES(bfcp_message *message, bfcp_received_attribute *recvA)</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">651</td>
<td class="TextItemSame">bfcp_supported_list *bfcp_parse_attribute_SUPPORTED_PRIMITIVES(bfcp_message *message, bfcp_received_attribute *recvA)</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">654</td>
<td class="TextItemSame">{</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">652</td>
<td class="TextItemSame">{</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">655</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(recvA-&gt;length&lt;3) /* The length of this attribute is wrong */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">653</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(recvA-&gt;length&lt;3) /* The length of this attribute is wrong */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">656</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">654</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">657</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int i;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">655</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; int i;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">658</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">656</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; bfcp_supported_list *first, *previous, *next;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">659</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; unsigned short int ch16;&nbsp; &nbsp; /* 16 bits */</td>
<td class="AlignCenter">+-</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">660</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+recvA-&gt;position+2;&nbsp; /* Skip the Header */</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">657</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; unsigned char *buffer = message-&gt;buffer+recvA-&gt;position+2;&nbsp; /* Skip the Header */</td>
</tr>
<tr class="SectionAll">
<td class="TextItemNum AlignRight">661</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; int number = (recvA-&gt;length-2)/2;&nbsp;&nbsp; /* Each supported primitive takes 2 bytes */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">658</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; int number = (recvA-&gt;length-2); /* Each supported primitive takes 1 bytes */</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">662</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!number)</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">659</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!number)</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">663</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* No supported primitives? */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">660</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;&nbsp; &nbsp; /* No supported primitives? */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">664</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">661</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; first = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">665</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">662</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(!first)&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">666</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">663</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">667</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp;&nbsp; memcpy(&amp;ch16, buffer, 2);</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">668</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; first-&gt;element = ntohs(ch16);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">664</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp;&nbsp; first-&gt;element = buffer[0];</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">669</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">665</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; previous = first;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">670</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(number&gt;1) {&nbsp; &nbsp; &nbsp; /* Let's parse each other supported primitive we find */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">666</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; if(number&gt;1) {&nbsp; &nbsp; &nbsp; /* Let's parse each other supported primitive we find */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">671</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; for(i = 1;i&lt;number;i++) {</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">667</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; for(i = 1;i&lt;number;i++) {</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">672</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">668</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next = calloc(1, sizeof(bfcp_supported_list));</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">673</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">669</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; if(!next)&nbsp;&nbsp; /* An error occurred in creating a new Supported Attributes list */</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">674</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">670</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; return NULL;</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">675</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer+2;&nbsp; /* Skip to the next supported primitive */</td>
<td class="AlignCenter">&lt;&gt;</td>
<td class="TextItemNum AlignRight">671</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; buffer = buffer + 1;&nbsp; &nbsp; /* Skip to the next supported primitive */</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">676</td>
<td class="TextItemSigLeftMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; memcpy(&amp;ch16, buffer, 2);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">&nbsp;</td>
<td class="TextItemSame">&nbsp;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">677</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = ntohs(ch16);</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">672</td>
<td class="TextItemSigDiffMod">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; next-&gt;element = buffer[0];</td>
</tr>
<tr class="SectionBegin">
<td class="TextItemNum AlignRight">678</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
<td class="AlignCenter">=</td>
<td class="TextItemNum AlignRight">673</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous-&gt;next = next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">679</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">674</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; previous = next;</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">680</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">675</td>
<td class="TextItemSame">&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">681</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">676</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; }</td>
</tr>
<tr class="SectionMiddle">
<td class="TextItemNum AlignRight">682</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">677</td>
<td class="TextItemSame">&nbsp;&nbsp;&nbsp; return first;</td>
</tr>
<tr class="SectionEnd">
<td class="TextItemNum AlignRight">683</td>
<td class="TextItemSame">}</td>
<td class="AlignCenter">&nbsp;</td>
<td class="TextItemNum AlignRight">678</td>
<td class="TextItemSame">}</td>
</tr>
</table>

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