We see its response, including the tell-tale application data header.

我们看到它的响应消息，包括泄露秘密的应用数据头。

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Listing 5 shows the createPipe subroutine used to create a nonblocking link to the xev monitoring program, as well as the printHeader subroutine, which prints the data header information to STDERR.

清单5显示了用于创建与xev监视程序之间的非阻塞链接的createpipe子例程，以及用于将数据头信息输出到STDERR中的printheader子例程。

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The script starts by reading in the data, then printing the body header.

脚本一开始是读入数据，然后输出主体表头。

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In the text payload, a section called UDH (User Data Header) is optional but defines lot of advanced features not all mobiles are compatible with.

FORBES: French Hacker Claims That Every Single iPhone Ever Made Vulnerable To SMS Spoofing Bug

As Apple is using the reply-to address of a message's User Data Header to identify the origin rather than the raw source, receiving iPhone owners risk being fooled by a phishing attack (or just a dishonest acquaintance) that poses as a contact or a company.

ENGADGET: iPhone reportedly vulnerable to text message spoofing flaw

Some forge their e-mail header--the data above and below an e-mail that contains information about the recipient and sender.

FORBES: Spam Warfare