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 <span id="projectnumber">0.9.0</span>
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<div id="projectbrief">Osmocom core library</div>
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<div class="title">Message buffers</div> </div>
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Files</h2></td></tr>
<tr class="memitem:msgb_8h"><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="msgb_8h.html">msgb.h</a></td></tr>
<tr class="memdesc:msgb_8h"><td class="mdescLeft"> </td><td class="mdescRight">Osmocom message buffers The Osmocom message buffers are modelled after the 'struct skb' inside the Linux kernel network stack. As they exist in userspace, they are much simplified. However, terminology such as headroom, tailroom, push/pull/put etc. remains the same. <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:msgb_8c"><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="msgb_8c.html">msgb.c</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structmsgb.html">msgb</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Osmocom message buffer. <a href="structmsgb.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:ga8cf2c52f02bf6e832d7880282a435a5b"><td class="memItemLeft" align="right" valign="top"><a id="ga8cf2c52f02bf6e832d7880282a435a5b"></a>
#define </td><td class="memItemRight" valign="bottom"><b>MSGB_DEBUG</b></td></tr>
<tr class="separator:ga8cf2c52f02bf6e832d7880282a435a5b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf2a76423d5e8b648c05a7696f9cf6ed3"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><b>MSGB_ABORT</b>(msg, fmt, args ...)</td></tr>
<tr class="separator:gaf2a76423d5e8b648c05a7696f9cf6ed3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5b0a3beb8ad95637539655d0bd2212e9"><td class="memItemLeft" align="right" valign="top"><a id="ga5b0a3beb8ad95637539655d0bd2212e9"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga5b0a3beb8ad95637539655d0bd2212e9">msgb_l1</a>(m)   ((void *)(m->l1h))</td></tr>
<tr class="memdesc:ga5b0a3beb8ad95637539655d0bd2212e9"><td class="mdescLeft"> </td><td class="mdescRight">obtain L1 header of msgb <br /></td></tr>
<tr class="separator:ga5b0a3beb8ad95637539655d0bd2212e9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf159332606c2999a33ed73d9e874013c"><td class="memItemLeft" align="right" valign="top"><a id="gaf159332606c2999a33ed73d9e874013c"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gaf159332606c2999a33ed73d9e874013c">msgb_l2</a>(m)   ((void *)(m->l2h))</td></tr>
<tr class="memdesc:gaf159332606c2999a33ed73d9e874013c"><td class="mdescLeft"> </td><td class="mdescRight">obtain L2 header of msgb <br /></td></tr>
<tr class="separator:gaf159332606c2999a33ed73d9e874013c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad9d9ef8e08a61b8d03226b1ba4a8fc99"><td class="memItemLeft" align="right" valign="top"><a id="gad9d9ef8e08a61b8d03226b1ba4a8fc99"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gad9d9ef8e08a61b8d03226b1ba4a8fc99">msgb_l3</a>(m)   ((void *)(m->l3h))</td></tr>
<tr class="memdesc:gad9d9ef8e08a61b8d03226b1ba4a8fc99"><td class="mdescLeft"> </td><td class="mdescRight">obtain L3 header of msgb <br /></td></tr>
<tr class="separator:gad9d9ef8e08a61b8d03226b1ba4a8fc99"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1394ee8d1bda46a881b3acaada40784d"><td class="memItemLeft" align="right" valign="top"><a id="ga1394ee8d1bda46a881b3acaada40784d"></a>
#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga1394ee8d1bda46a881b3acaada40784d">msgb_sms</a>(m)   ((void *)(m->l4h))</td></tr>
<tr class="memdesc:ga1394ee8d1bda46a881b3acaada40784d"><td class="mdescLeft"> </td><td class="mdescRight">obtain SMS header of msgb <br /></td></tr>
<tr class="separator:ga1394ee8d1bda46a881b3acaada40784d"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga25906d049cbad1bf2d5a785319268ea8"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structmsgb.html">msgb</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga25906d049cbad1bf2d5a785319268ea8">msgb_alloc</a> (uint16_t size, const char *name)</td></tr>
<tr class="memdesc:ga25906d049cbad1bf2d5a785319268ea8"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a new message buffer. <a href="#ga25906d049cbad1bf2d5a785319268ea8">More...</a><br /></td></tr>
<tr class="separator:ga25906d049cbad1bf2d5a785319268ea8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae48b55f6f4529aafb069eaa3fa1998f0"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gae48b55f6f4529aafb069eaa3fa1998f0">msgb_free</a> (struct <a class="el" href="structmsgb.html">msgb</a> *m)</td></tr>
<tr class="memdesc:gae48b55f6f4529aafb069eaa3fa1998f0"><td class="mdescLeft"> </td><td class="mdescRight">Release given message buffer. <a href="#gae48b55f6f4529aafb069eaa3fa1998f0">More...</a><br /></td></tr>
<tr class="separator:gae48b55f6f4529aafb069eaa3fa1998f0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gacb8dd9493eb7fc266ce159e3325c6504"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gacb8dd9493eb7fc266ce159e3325c6504">msgb_enqueue</a> (struct <a class="el" href="structllist__head.html">llist_head</a> *queue, struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:gacb8dd9493eb7fc266ce159e3325c6504"><td class="mdescLeft"> </td><td class="mdescRight">Enqueue message buffer to tail of a queue. <a href="#gacb8dd9493eb7fc266ce159e3325c6504">More...</a><br /></td></tr>
<tr class="separator:gacb8dd9493eb7fc266ce159e3325c6504"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gadf56eab1dbbb193b132c3dc6ba4222bc"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structmsgb.html">msgb</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gadf56eab1dbbb193b132c3dc6ba4222bc">msgb_dequeue</a> (struct <a class="el" href="structllist__head.html">llist_head</a> *queue)</td></tr>
<tr class="memdesc:gadf56eab1dbbb193b132c3dc6ba4222bc"><td class="mdescLeft"> </td><td class="mdescRight">Dequeue message buffer from head of queue. <a href="#gadf56eab1dbbb193b132c3dc6ba4222bc">More...</a><br /></td></tr>
<tr class="separator:gadf56eab1dbbb193b132c3dc6ba4222bc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5676421c50ed5d0049b53605fc5397ce"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga5676421c50ed5d0049b53605fc5397ce">msgb_reset</a> (struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:ga5676421c50ed5d0049b53605fc5397ce"><td class="mdescLeft"> </td><td class="mdescRight">Re-set all message buffer pointers. <a href="#ga5676421c50ed5d0049b53605fc5397ce">More...</a><br /></td></tr>
<tr class="separator:ga5676421c50ed5d0049b53605fc5397ce"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga036077cd924b90a798cb3b6c5541a492"><td class="memItemLeft" align="right" valign="top">uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga036077cd924b90a798cb3b6c5541a492">msgb_length</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:ga036077cd924b90a798cb3b6c5541a492"><td class="mdescLeft"> </td><td class="mdescRight">get length of message buffer <a href="#ga036077cd924b90a798cb3b6c5541a492">More...</a><br /></td></tr>
<tr class="separator:ga036077cd924b90a798cb3b6c5541a492"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9a703fb35c8eafd88c6d0d20aef465ac"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga9a703fb35c8eafd88c6d0d20aef465ac">msgb_hexdump</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:ga9a703fb35c8eafd88c6d0d20aef465ac"><td class="mdescLeft"> </td><td class="mdescRight">Return a (static) buffer containing a hexdump of the msg. <a href="#ga9a703fb35c8eafd88c6d0d20aef465ac">More...</a><br /></td></tr>
<tr class="separator:ga9a703fb35c8eafd88c6d0d20aef465ac"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga6c906f4c3afd52d2813a9c9a50acdf48"><td class="memItemLeft" align="right" valign="top">static unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga6c906f4c3afd52d2813a9c9a50acdf48">msgb_l1len</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga6c906f4c3afd52d2813a9c9a50acdf48"><td class="mdescLeft"> </td><td class="mdescRight">determine length of L1 message <a href="#ga6c906f4c3afd52d2813a9c9a50acdf48">More...</a><br /></td></tr>
<tr class="separator:ga6c906f4c3afd52d2813a9c9a50acdf48"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga62f1183fcbb03ae09b922a79b95528ab"><td class="memItemLeft" align="right" valign="top">static unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga62f1183fcbb03ae09b922a79b95528ab">msgb_l2len</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga62f1183fcbb03ae09b922a79b95528ab"><td class="mdescLeft"> </td><td class="mdescRight">determine length of L2 message <a href="#ga62f1183fcbb03ae09b922a79b95528ab">More...</a><br /></td></tr>
<tr class="separator:ga62f1183fcbb03ae09b922a79b95528ab"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga519e9198fe06b0ea67ada65e77c5d7b2"><td class="memItemLeft" align="right" valign="top">static unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga519e9198fe06b0ea67ada65e77c5d7b2">msgb_l3len</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga519e9198fe06b0ea67ada65e77c5d7b2"><td class="mdescLeft"> </td><td class="mdescRight">determine length of L3 message <a href="#ga519e9198fe06b0ea67ada65e77c5d7b2">More...</a><br /></td></tr>
<tr class="separator:ga519e9198fe06b0ea67ada65e77c5d7b2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae54ddbf27117a4cb1b750c6b113a0d0c"><td class="memItemLeft" align="right" valign="top">static unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gae54ddbf27117a4cb1b750c6b113a0d0c">msgb_headlen</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:gae54ddbf27117a4cb1b750c6b113a0d0c"><td class="mdescLeft"> </td><td class="mdescRight">determine the length of the header <a href="#gae54ddbf27117a4cb1b750c6b113a0d0c">More...</a><br /></td></tr>
<tr class="separator:gae54ddbf27117a4cb1b750c6b113a0d0c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga14ba72cbede82dddeece5838969d064c"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga14ba72cbede82dddeece5838969d064c">msgb_tailroom</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga14ba72cbede82dddeece5838969d064c"><td class="mdescLeft"> </td><td class="mdescRight">determine how much tail room is left in msgb <a href="#ga14ba72cbede82dddeece5838969d064c">More...</a><br /></td></tr>
<tr class="separator:ga14ba72cbede82dddeece5838969d064c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaff7eae95ec007dd419dc60c03c3db5bd"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gaff7eae95ec007dd419dc60c03c3db5bd">msgb_headroom</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:gaff7eae95ec007dd419dc60c03c3db5bd"><td class="mdescLeft"> </td><td class="mdescRight">determine the amount of headroom in msgb <a href="#gaff7eae95ec007dd419dc60c03c3db5bd">More...</a><br /></td></tr>
<tr class="separator:gaff7eae95ec007dd419dc60c03c3db5bd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gab3d4e62c08a29ddb73c00eab4b3f2e91"><td class="memItemLeft" align="right" valign="top">static unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gab3d4e62c08a29ddb73c00eab4b3f2e91">msgb_put</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, unsigned int len)</td></tr>
<tr class="memdesc:gab3d4e62c08a29ddb73c00eab4b3f2e91"><td class="mdescLeft"> </td><td class="mdescRight">append data to end of message buffer <a href="#gab3d4e62c08a29ddb73c00eab4b3f2e91">More...</a><br /></td></tr>
<tr class="separator:gab3d4e62c08a29ddb73c00eab4b3f2e91"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gabf3d11e3739218fe013956285819f772"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gabf3d11e3739218fe013956285819f772">msgb_put_u8</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, uint8_t word)</td></tr>
<tr class="memdesc:gabf3d11e3739218fe013956285819f772"><td class="mdescLeft"> </td><td class="mdescRight">append a uint8 value to the end of the message <a href="#gabf3d11e3739218fe013956285819f772">More...</a><br /></td></tr>
<tr class="separator:gabf3d11e3739218fe013956285819f772"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga8c951f453a3d6dd6c800fc5d7480534c"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga8c951f453a3d6dd6c800fc5d7480534c">msgb_put_u16</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, uint16_t word)</td></tr>
<tr class="memdesc:ga8c951f453a3d6dd6c800fc5d7480534c"><td class="mdescLeft"> </td><td class="mdescRight">append a uint16 value to the end of the message <a href="#ga8c951f453a3d6dd6c800fc5d7480534c">More...</a><br /></td></tr>
<tr class="separator:ga8c951f453a3d6dd6c800fc5d7480534c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2650307d02f185d8f6ac11b8de7738c6"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga2650307d02f185d8f6ac11b8de7738c6">msgb_put_u32</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, uint32_t word)</td></tr>
<tr class="memdesc:ga2650307d02f185d8f6ac11b8de7738c6"><td class="mdescLeft"> </td><td class="mdescRight">append a uint32 value to the end of the message <a href="#ga2650307d02f185d8f6ac11b8de7738c6">More...</a><br /></td></tr>
<tr class="separator:ga2650307d02f185d8f6ac11b8de7738c6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaff0a8219014e7f55c1aec795dd9a00c9"><td class="memItemLeft" align="right" valign="top">static unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gaff0a8219014e7f55c1aec795dd9a00c9">msgb_get</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, unsigned int len)</td></tr>
<tr class="memdesc:gaff0a8219014e7f55c1aec795dd9a00c9"><td class="mdescLeft"> </td><td class="mdescRight">remove data from end of message <a href="#gaff0a8219014e7f55c1aec795dd9a00c9">More...</a><br /></td></tr>
<tr class="separator:gaff0a8219014e7f55c1aec795dd9a00c9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa5b5674fbbe7b7206565f79dba2ca28f"><td class="memItemLeft" align="right" valign="top">static uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gaa5b5674fbbe7b7206565f79dba2ca28f">msgb_get_u8</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:gaa5b5674fbbe7b7206565f79dba2ca28f"><td class="mdescLeft"> </td><td class="mdescRight">remove uint8 from end of message <a href="#gaa5b5674fbbe7b7206565f79dba2ca28f">More...</a><br /></td></tr>
<tr class="separator:gaa5b5674fbbe7b7206565f79dba2ca28f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad07b39cd3d4d0865b4139582eb458e00"><td class="memItemLeft" align="right" valign="top">static uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gad07b39cd3d4d0865b4139582eb458e00">msgb_get_u16</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:gad07b39cd3d4d0865b4139582eb458e00"><td class="mdescLeft"> </td><td class="mdescRight">remove uint16 from end of message <a href="#gad07b39cd3d4d0865b4139582eb458e00">More...</a><br /></td></tr>
<tr class="separator:gad07b39cd3d4d0865b4139582eb458e00"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga3a53a5bb768bc46ad048794d0bd8e061"><td class="memItemLeft" align="right" valign="top">static uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga3a53a5bb768bc46ad048794d0bd8e061">msgb_get_u32</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga3a53a5bb768bc46ad048794d0bd8e061"><td class="mdescLeft"> </td><td class="mdescRight">remove uint32 from end of message <a href="#ga3a53a5bb768bc46ad048794d0bd8e061">More...</a><br /></td></tr>
<tr class="separator:ga3a53a5bb768bc46ad048794d0bd8e061"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga57aa757d6be7e0d7d16f04f0bea0dd8c"><td class="memItemLeft" align="right" valign="top">static unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga57aa757d6be7e0d7d16f04f0bea0dd8c">msgb_push</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, unsigned int len)</td></tr>
<tr class="memdesc:ga57aa757d6be7e0d7d16f04f0bea0dd8c"><td class="mdescLeft"> </td><td class="mdescRight">prepend (push) some data to start of message <a href="#ga57aa757d6be7e0d7d16f04f0bea0dd8c">More...</a><br /></td></tr>
<tr class="separator:ga57aa757d6be7e0d7d16f04f0bea0dd8c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga39f61ddcffeb467861c447169edd9999"><td class="memItemLeft" align="right" valign="top">static unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga39f61ddcffeb467861c447169edd9999">msgb_pull</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>, unsigned int len)</td></tr>
<tr class="memdesc:ga39f61ddcffeb467861c447169edd9999"><td class="mdescLeft"> </td><td class="mdescRight">remove (pull) a header from the front of the message buffer <a href="#ga39f61ddcffeb467861c447169edd9999">More...</a><br /></td></tr>
<tr class="separator:ga39f61ddcffeb467861c447169edd9999"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga88912348df874ec6bb89be7238b98cd7"><td class="memItemLeft" align="right" valign="top">static unsigned char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga88912348df874ec6bb89be7238b98cd7">msgb_pull_to_l3</a> (struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:ga88912348df874ec6bb89be7238b98cd7"><td class="mdescLeft"> </td><td class="mdescRight">remove (pull) all headers in front of l3h from the message buffer. <a href="#ga88912348df874ec6bb89be7238b98cd7">More...</a><br /></td></tr>
<tr class="separator:ga88912348df874ec6bb89be7238b98cd7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0d66ac4622d966dfd30ce3ced46f7bff"><td class="memItemLeft" align="right" valign="top">static uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga0d66ac4622d966dfd30ce3ced46f7bff">msgb_pull_u8</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga0d66ac4622d966dfd30ce3ced46f7bff"><td class="mdescLeft"> </td><td class="mdescRight">remove uint8 from front of message <a href="#ga0d66ac4622d966dfd30ce3ced46f7bff">More...</a><br /></td></tr>
<tr class="separator:ga0d66ac4622d966dfd30ce3ced46f7bff"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2e2c2eb7ddf48d24cd78f95151537a73"><td class="memItemLeft" align="right" valign="top">static uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga2e2c2eb7ddf48d24cd78f95151537a73">msgb_pull_u16</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga2e2c2eb7ddf48d24cd78f95151537a73"><td class="mdescLeft"> </td><td class="mdescRight">remove uint16 from front of message <a href="#ga2e2c2eb7ddf48d24cd78f95151537a73">More...</a><br /></td></tr>
<tr class="separator:ga2e2c2eb7ddf48d24cd78f95151537a73"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga68f43d95ab0571e207ccc679c426bbbe"><td class="memItemLeft" align="right" valign="top">static uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga68f43d95ab0571e207ccc679c426bbbe">msgb_pull_u32</a> (struct <a class="el" href="structmsgb.html">msgb</a> *<a class="el" href="structmsgb.html">msgb</a>)</td></tr>
<tr class="memdesc:ga68f43d95ab0571e207ccc679c426bbbe"><td class="mdescLeft"> </td><td class="mdescRight">remove uint32 from front of message <a href="#ga68f43d95ab0571e207ccc679c426bbbe">More...</a><br /></td></tr>
<tr class="separator:ga68f43d95ab0571e207ccc679c426bbbe"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gad73da5b3dce61877ad745d5e25ea44d5"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gad73da5b3dce61877ad745d5e25ea44d5">msgb_reserve</a> (struct <a class="el" href="structmsgb.html">msgb</a> *msg, int len)</td></tr>
<tr class="memdesc:gad73da5b3dce61877ad745d5e25ea44d5"><td class="mdescLeft"> </td><td class="mdescRight">Increase headroom of empty msgb, reducing the tailroom. <a href="#gad73da5b3dce61877ad745d5e25ea44d5">More...</a><br /></td></tr>
<tr class="separator:gad73da5b3dce61877ad745d5e25ea44d5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9c64d044b82dc23de865fadc8533249e"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga9c64d044b82dc23de865fadc8533249e">msgb_trim</a> (struct <a class="el" href="structmsgb.html">msgb</a> *msg, int len)</td></tr>
<tr class="memdesc:ga9c64d044b82dc23de865fadc8533249e"><td class="mdescLeft"> </td><td class="mdescRight">Trim the msgb to a given absolute length. <a href="#ga9c64d044b82dc23de865fadc8533249e">More...</a><br /></td></tr>
<tr class="separator:ga9c64d044b82dc23de865fadc8533249e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gadcf2bccabb0370141eebdc32aca77d30"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gadcf2bccabb0370141eebdc32aca77d30">msgb_l3trim</a> (struct <a class="el" href="structmsgb.html">msgb</a> *msg, int l3len)</td></tr>
<tr class="memdesc:gadcf2bccabb0370141eebdc32aca77d30"><td class="mdescLeft"> </td><td class="mdescRight">Trim the msgb to a given layer3 length. <a href="#gadcf2bccabb0370141eebdc32aca77d30">More...</a><br /></td></tr>
<tr class="separator:gadcf2bccabb0370141eebdc32aca77d30"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaa9e542be4e4aa533d02dbe213beb516a"><td class="memItemLeft" align="right" valign="top">static struct <a class="el" href="structmsgb.html">msgb</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#gaa9e542be4e4aa533d02dbe213beb516a">msgb_alloc_headroom</a> (int size, int headroom, const char *name)</td></tr>
<tr class="memdesc:gaa9e542be4e4aa533d02dbe213beb516a"><td class="mdescLeft"> </td><td class="mdescRight">Allocate message buffer with specified headroom. <a href="#gaa9e542be4e4aa533d02dbe213beb516a">More...</a><br /></td></tr>
<tr class="separator:gaa9e542be4e4aa533d02dbe213beb516a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga9bed2fe8aedfa7619eda155a4afbaf9a"><td class="memItemLeft" align="right" valign="top">uint8_t * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga9bed2fe8aedfa7619eda155a4afbaf9a">msgb_data</a> (const struct <a class="el" href="structmsgb.html">msgb</a> *msg)</td></tr>
<tr class="memdesc:ga9bed2fe8aedfa7619eda155a4afbaf9a"><td class="mdescLeft"> </td><td class="mdescRight">get pointer to data section of message buffer <a href="#ga9bed2fe8aedfa7619eda155a4afbaf9a">More...</a><br /></td></tr>
<tr class="separator:ga9bed2fe8aedfa7619eda155a4afbaf9a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1d57bb92a849857deb6871446d3230da"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__msgb.html#ga1d57bb92a849857deb6871446d3230da">msgb_set_talloc_ctx</a> (void *ctx)</td></tr>
<tr class="memdesc:ga1d57bb92a849857deb6871446d3230da"><td class="mdescLeft"> </td><td class="mdescRight">Set the talloc context for <a class="el" href="group__msgb.html#ga25906d049cbad1bf2d5a785319268ea8">msgb_alloc</a>. <a href="#ga1d57bb92a849857deb6871446d3230da">More...</a><br /></td></tr>
<tr class="separator:ga1d57bb92a849857deb6871446d3230da"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="var-members"></a>
Variables</h2></td></tr>
<tr class="memitem:ga72b7917a2ec7fb2120f31cab8d749218"><td class="memItemLeft" align="right" valign="top"><a id="ga72b7917a2ec7fb2120f31cab8d749218"></a>
void * </td><td class="memItemRight" valign="bottom"><b>tall_msgb_ctx</b></td></tr>
<tr class="separator:ga72b7917a2ec7fb2120f31cab8d749218"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Macro Definition Documentation</h2>
<a id="gaf2a76423d5e8b648c05a7696f9cf6ed3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gaf2a76423d5e8b648c05a7696f9cf6ed3">◆ </a></span>MSGB_ABORT</h2>
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<td class="memname">#define MSGB_ABORT</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">msg, </td>
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<td></td>
<td class="paramtype"> </td>
<td class="paramname">fmt, </td>
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<td class="paramtype"> </td>
<td class="paramname">args ... </td>
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<td>)</td>
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</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> osmo_panic(<span class="stringliteral">"msgb(%p): "</span> fmt, msg, ## args); \</div><div class="line"> } <span class="keywordflow">while</span>(0)</div></div><!-- fragment -->
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga25906d049cbad1bf2d5a785319268ea8"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga25906d049cbad1bf2d5a785319268ea8">◆ </a></span>msgb_alloc()</h2>
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<td class="memname">struct <a class="el" href="structmsgb.html">msgb</a> * msgb_alloc </td>
<td>(</td>
<td class="paramtype">uint16_t </td>
<td class="paramname"><em>size</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const char * </td>
<td class="paramname"><em>name</em> </td>
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<td>)</td>
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</div><div class="memdoc">
<p>Allocate a new message buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>Length in octets, including headroom </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">name</td><td>Human-readable name to be associated with msgb</td></tr>
</table>
</dd>
</dl>
<p>This function allocates a 'struct msgb' as well as the underlying memory buffer for the actual message data (size specified by <em>size</em>) using the talloc memory context previously set by <a class="el" href="group__msgb.html#ga1d57bb92a849857deb6871446d3230da">msgb_set_talloc_ctx</a> </p>
<p class="reference">Referenced by <a class="el" href="group__gsmtap.html#gae7ba12e20878e5485892c404189861ea">gsmtap_makemsg_ex()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaa9e542be4e4aa533d02dbe213beb516a">◆ </a></span>msgb_alloc_headroom()</h2>
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<td class="memname">static struct <a class="el" href="structmsgb.html">msgb</a>* msgb_alloc_headroom </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>size</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>headroom</em>, </td>
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<td class="paramtype">const char * </td>
<td class="paramname"><em>name</em> </td>
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<p>Allocate message buffer with specified headroom. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">size</td><td>size in bytes, including headroom </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">headroom</td><td>headroom in bytes </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">name</td><td>human-readable name </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>allocated message buffer with specified headroom</dd></dl>
<p>This function is a convenience wrapper around <a class="el" href="group__msgb.html#ga25906d049cbad1bf2d5a785319268ea8">msgb_alloc</a> followed by <a class="el" href="group__msgb.html#gad73da5b3dce61877ad745d5e25ea44d5">msgb_reserve</a> in order to create a new <a class="el" href="group__msgb.html">Message buffers</a> with user-specified amount of headroom. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga9bed2fe8aedfa7619eda155a4afbaf9a">◆ </a></span>msgb_data()</h2>
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<td class="memname">uint8_t * msgb_data </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em></td><td>)</td>
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<p>get pointer to data section of message buffer </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to data section of message buffer </dd></dl>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gadf56eab1dbbb193b132c3dc6ba4222bc">◆ </a></span>msgb_dequeue()</h2>
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<td class="memname">struct <a class="el" href="structmsgb.html">msgb</a> * msgb_dequeue </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structllist__head.html">llist_head</a> * </td>
<td class="paramname"><em>queue</em></td><td>)</td>
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<p>Dequeue message buffer from head of queue. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">queue</td><td>linked list header of queue </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>message buffer (if any) or NULL if queue empty</dd></dl>
<p>The function will remove the first message buffer from the queue implemented by <a class="el" href="structllist__head.html">llist_head</a> <em>queue</em>. </p>
<p class="reference">Referenced by <a class="el" href="group__write__queue.html#ga56bb1b9d13a946be09fdbf400545d7ad">osmo_wqueue_bfd_cb()</a>, and <a class="el" href="group__write__queue.html#ga833b4f5244c00c775260a83e9918073c">osmo_wqueue_clear()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gacb8dd9493eb7fc266ce159e3325c6504">◆ </a></span>msgb_enqueue()</h2>
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<td class="memname">void msgb_enqueue </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structllist__head.html">llist_head</a> * </td>
<td class="paramname"><em>queue</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em> </td>
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<p>Enqueue message buffer to tail of a queue. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">queue</td><td>linked list header of queue </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer to be added to the queue</td></tr>
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</dd>
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<p>The function will append the specified message buffer <em>msg</em> to the queue implemented by <a class="el" href="structllist__head.html">llist_head</a> <em>queue</em> </p>
<p class="reference">References <a class="el" href="structmsgb.html#adf938257627add0f055a45a206b2a451">list</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__write__queue.html#ga9855de966a4f01d6df3a747422b02824">osmo_wqueue_enqueue()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gae48b55f6f4529aafb069eaa3fa1998f0">◆ </a></span>msgb_free()</h2>
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<td class="memname">void msgb_free </td>
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<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>m</em></td><td>)</td>
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<p>Release given message buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">m</td><td>Message buffer to be free'd </td></tr>
</table>
</dd>
</dl>
<p class="reference">Referenced by <a class="el" href="group__gsmtap.html#ga41ee3b7cd837968637a122aa83ea5af3">gsmtap_sendmsg()</a>, <a class="el" href="group__write__queue.html#ga56bb1b9d13a946be09fdbf400545d7ad">osmo_wqueue_bfd_cb()</a>, and <a class="el" href="group__write__queue.html#ga833b4f5244c00c775260a83e9918073c">osmo_wqueue_clear()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaff0a8219014e7f55c1aec795dd9a00c9">◆ </a></span>msgb_get()</h2>
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<td class="memname">static unsigned char* msgb_get </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>len</em> </td>
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<td>)</td>
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<p>remove data from end of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>number of bytes to remove from end </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>, <a class="el" href="group__msgb.html#ga036077cd924b90a798cb3b6c5541a492">msgb_length()</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#gad07b39cd3d4d0865b4139582eb458e00">msgb_get_u16()</a>, <a class="el" href="group__msgb.html#ga3a53a5bb768bc46ad048794d0bd8e061">msgb_get_u32()</a>, and <a class="el" href="group__msgb.html#gaa5b5674fbbe7b7206565f79dba2ca28f">msgb_get_u8()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gad07b39cd3d4d0865b4139582eb458e00">◆ </a></span>msgb_get_u16()</h2>
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<td class="memname">static uint16_t msgb_get_u16 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint16 from end of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>16bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#gaff0a8219014e7f55c1aec795dd9a00c9">msgb_get()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga3a53a5bb768bc46ad048794d0bd8e061">◆ </a></span>msgb_get_u32()</h2>
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<td class="memname">static uint32_t msgb_get_u32 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint32 from end of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>32bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#gaff0a8219014e7f55c1aec795dd9a00c9">msgb_get()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaa5b5674fbbe7b7206565f79dba2ca28f">◆ </a></span>msgb_get_u8()</h2>
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<td class="memname">static uint8_t msgb_get_u8 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint8 from end of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>8bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#gaff0a8219014e7f55c1aec795dd9a00c9">msgb_get()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gae54ddbf27117a4cb1b750c6b113a0d0c">◆ </a></span>msgb_headlen()</h2>
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<td class="memname">static unsigned int msgb_headlen </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine the length of the header </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>number of bytes between start of buffer and start of msg</dd></dl>
<p>This function computes the length difference between the underlying data buffer and the used section of the <em>msgb</em>. </p>
<p class="reference">References <a class="el" href="structmsgb.html#ad9e56fcc205b34f6ae481b64c197b44d">data_len</a>, and <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaff7eae95ec007dd419dc60c03c3db5bd">◆ </a></span>msgb_headroom()</h2>
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<td class="memname">static int msgb_headroom </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine the amount of headroom in msgb </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>number of bytes left ahead of message start in msgb</dd></dl>
<p>This function computes the amount of bytes left in the underlying data buffer before the start of the actual message. </p>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, and <a class="el" href="structmsgb.html#afb91181f130ef44fea8cacd94bf2d516">head</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#ga57aa757d6be7e0d7d16f04f0bea0dd8c">msgb_push()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga9a703fb35c8eafd88c6d0d20aef465ac">◆ </a></span>msgb_hexdump()</h2>
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<td class="memname">const char * msgb_hexdump </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em></td><td>)</td>
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<p>Return a (static) buffer containing a hexdump of the msg. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>a pointer to a static char array </dd></dl>
<p class="reference">References <a class="el" href="group__utils.html#ga6242a25f9d996f0cc4f4cdb911218b75">ARRAY_SIZE</a>, <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#afcf0eda8d8acc8744a3e0d7b29c0d99a">l1h</a>, <a class="el" href="structmsgb.html#a078a458fb0d6f2dd10a95cb1344ad385">l2h</a>, <a class="el" href="structmsgb.html#a6bffebeedd2a24ecafd656cf6136a1eb">l3h</a>, <a class="el" href="structmsgb.html#aba32a66d2e545ceed675bbba031ad5fc">l4h</a>, <a class="el" href="group__utils.html#gadfc3801536ff055305f7b2563539237f">osmo_hexdump()</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga6c906f4c3afd52d2813a9c9a50acdf48">◆ </a></span>msgb_l1len()</h2>
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<td class="memname">static unsigned int msgb_l1len </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine length of L1 message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>size of L1 message in bytes</dd></dl>
<p>This function computes the number of bytes between the tail of the message and the layer 1 header. </p>
<p class="reference">References <a class="el" href="group__msgb.html#ga5b0a3beb8ad95637539655d0bd2212e9">msgb_l1</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga62f1183fcbb03ae09b922a79b95528ab">◆ </a></span>msgb_l2len()</h2>
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<td class="memname">static unsigned int msgb_l2len </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine length of L2 message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>size of L2 message in bytes</dd></dl>
<p>This function computes the number of bytes between the tail of the message and the layer 2 header. </p>
<p class="reference">References <a class="el" href="group__msgb.html#gaf159332606c2999a33ed73d9e874013c">msgb_l2</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga519e9198fe06b0ea67ada65e77c5d7b2">◆ </a></span>msgb_l3len()</h2>
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<td class="memname">static unsigned int msgb_l3len </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine length of L3 message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>size of L3 message in bytes</dd></dl>
<p>This function computes the number of bytes between the tail of the message and the layer 3 header. </p>
<p class="reference">References <a class="el" href="group__msgb.html#gad9d9ef8e08a61b8d03226b1ba4a8fc99">msgb_l3</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gadcf2bccabb0370141eebdc32aca77d30">◆ </a></span>msgb_l3trim()</h2>
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<td class="memname">static int msgb_l3trim </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>l3len</em> </td>
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<p>Trim the msgb to a given layer3 length. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">l3len</td><td>new layer3 length </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 in case of success, negative in case of error </dd></dl>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#a6bffebeedd2a24ecafd656cf6136a1eb">l3h</a>, and <a class="el" href="group__msgb.html#ga9c64d044b82dc23de865fadc8533249e">msgb_trim()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga036077cd924b90a798cb3b6c5541a492">◆ </a></span>msgb_length()</h2>
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<td class="memname">uint16_t msgb_length </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em></td><td>)</td>
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<p>get length of message buffer </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>length of data section in message buffer </dd></dl>
<p class="reference">References <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#gaff0a8219014e7f55c1aec795dd9a00c9">msgb_get()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga39f61ddcffeb467861c447169edd9999">◆ </a></span>msgb_pull()</h2>
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<td class="memname">static unsigned char* msgb_pull </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>len</em> </td>
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<p>remove (pull) a header from the front of the message buffer </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>number of octets to be pulled </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to new start of msgb</dd></dl>
<p>This function moves the <em>data</em> pointer of the <a class="el" href="group__msgb.html">Message buffers</a> further back in the message, thereby shrinking the size of the message by <em>len</em> bytes. </p>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, and <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#ga88912348df874ec6bb89be7238b98cd7">msgb_pull_to_l3()</a>, <a class="el" href="group__msgb.html#ga2e2c2eb7ddf48d24cd78f95151537a73">msgb_pull_u16()</a>, <a class="el" href="group__msgb.html#ga68f43d95ab0571e207ccc679c426bbbe">msgb_pull_u32()</a>, and <a class="el" href="group__msgb.html#ga0d66ac4622d966dfd30ce3ced46f7bff">msgb_pull_u8()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga88912348df874ec6bb89be7238b98cd7">◆ </a></span>msgb_pull_to_l3()</h2>
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<td class="memname">static unsigned char* msgb_pull_to_l3 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em></td><td>)</td>
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<p>remove (pull) all headers in front of l3h from the message buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer with a valid l3h </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to new start of msgb (l3h)</dd></dl>
<p>This function moves the <em>data</em> pointer of the <a class="el" href="group__msgb.html">Message buffers</a> further back in the message, thereby shrinking the size of the message. l1h and l2h will be cleared. </p>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#afcf0eda8d8acc8744a3e0d7b29c0d99a">l1h</a>, <a class="el" href="structmsgb.html#a078a458fb0d6f2dd10a95cb1344ad385">l2h</a>, <a class="el" href="structmsgb.html#a6bffebeedd2a24ecafd656cf6136a1eb">l3h</a>, and <a class="el" href="group__msgb.html#ga39f61ddcffeb467861c447169edd9999">msgb_pull()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2e2c2eb7ddf48d24cd78f95151537a73">◆ </a></span>msgb_pull_u16()</h2>
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<td class="memname">static uint16_t msgb_pull_u16 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint16 from front of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>16bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#ga39f61ddcffeb467861c447169edd9999">msgb_pull()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga68f43d95ab0571e207ccc679c426bbbe">◆ </a></span>msgb_pull_u32()</h2>
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<td class="memname">static uint32_t msgb_pull_u32 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint32 from front of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>32bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#ga39f61ddcffeb467861c447169edd9999">msgb_pull()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga0d66ac4622d966dfd30ce3ced46f7bff">◆ </a></span>msgb_pull_u8()</h2>
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<td class="memname">static uint8_t msgb_pull_u8 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>remove uint8 from front of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>8bit value taken from end of msgb </dd></dl>
<p class="reference">References <a class="el" href="group__msgb.html#ga39f61ddcffeb467861c447169edd9999">msgb_pull()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga57aa757d6be7e0d7d16f04f0bea0dd8c">◆ </a></span>msgb_push()</h2>
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<td class="memname">static unsigned char* msgb_push </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>len</em> </td>
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<p>prepend (push) some data to start of message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>number of bytes to pre-pend </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>pointer to newly added portion at start of <em>msgb</em> </dd></dl>
<p>This function moves the <em>data</em> pointer of the <a class="el" href="group__msgb.html">Message buffers</a> further to the front (by <em>len</em> bytes), thereby enlarging the message by <em>len</em> bytes.</p>
<p>The return value is a pointer to the newly added section in the beginning of the message. It can be used to fill/copy data into it. </p>
<p class="reference">References <a class="el" href="group__msgb.html#gaff7eae95ec007dd419dc60c03c3db5bd">msgb_headroom()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gab3d4e62c08a29ddb73c00eab4b3f2e91">◆ </a></span>msgb_put()</h2>
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<td class="memname">static unsigned char* msgb_put </td>
<td>(</td>
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<td class="paramtype">unsigned int </td>
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<p>append data to end of message buffer </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>number of bytes to append to message </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>pointer to start of newly-appended data</dd></dl>
<p>This function will move the <em>tail</em> pointer of the message buffer <em>len</em> bytes further, thus enlarging the message by <em>len</em> bytes.</p>
<p>The return value is a pointer to start of the newly added section at the end of the message and can be used for actually filling/copying data into it. </p>
<p class="reference">References <a class="el" href="group__msgb.html#ga14ba72cbede82dddeece5838969d064c">msgb_tailroom()</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__gsmtap.html#gae7ba12e20878e5485892c404189861ea">gsmtap_makemsg_ex()</a>, <a class="el" href="group__msgb.html#ga8c951f453a3d6dd6c800fc5d7480534c">msgb_put_u16()</a>, <a class="el" href="group__msgb.html#ga2650307d02f185d8f6ac11b8de7738c6">msgb_put_u32()</a>, and <a class="el" href="group__msgb.html#gabf3d11e3739218fe013956285819f772">msgb_put_u8()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga8c951f453a3d6dd6c800fc5d7480534c">◆ </a></span>msgb_put_u16()</h2>
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<td class="memname">static void msgb_put_u16 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
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<td class="paramtype">uint16_t </td>
<td class="paramname"><em>word</em> </td>
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<p>append a uint16 value to the end of the message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">word</td><td>unsigned 16bit byte to be appended </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="group__msgb.html#gab3d4e62c08a29ddb73c00eab4b3f2e91">msgb_put()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2650307d02f185d8f6ac11b8de7738c6">◆ </a></span>msgb_put_u32()</h2>
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<td class="memname">static void msgb_put_u32 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
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<td class="paramtype">uint32_t </td>
<td class="paramname"><em>word</em> </td>
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<p>append a uint32 value to the end of the message </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">word</td><td>unsigned 32bit byte to be appended </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="group__msgb.html#gab3d4e62c08a29ddb73c00eab4b3f2e91">msgb_put()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#gabf3d11e3739218fe013956285819f772">◆ </a></span>msgb_put_u8()</h2>
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<td class="memname">static void msgb_put_u8 </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t </td>
<td class="paramname"><em>word</em> </td>
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<p>append a uint8 value to the end of the message </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">word</td><td>unsigned 8bit byte to be appended </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="group__msgb.html#gab3d4e62c08a29ddb73c00eab4b3f2e91">msgb_put()</a>.</p>
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<a id="gad73da5b3dce61877ad745d5e25ea44d5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gad73da5b3dce61877ad745d5e25ea44d5">◆ </a></span>msgb_reserve()</h2>
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<td class="memname">static void msgb_reserve </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>len</em> </td>
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<p>Increase headroom of empty msgb, reducing the tailroom. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>amount of extra octets to be reserved as headroom</td></tr>
</table>
</dd>
</dl>
<p>This function reserves some memory at the beginning of the underlying data buffer. The idea is to reserve space in case further headers have to be pushed to the <a class="el" href="group__msgb.html">Message buffers</a> during further processing.</p>
<p>Calling this function leads to undefined reusults if it is called on a non-empty <a class="el" href="group__msgb.html">Message buffers</a>. </p>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga5676421c50ed5d0049b53605fc5397ce">◆ </a></span>msgb_reset()</h2>
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<td class="memname">void msgb_reset </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em></td><td>)</td>
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<p>Re-set all message buffer pointers. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer that is to be resetted</td></tr>
</table>
</dd>
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<p>This will re-set the various internal pointers into the underlying message buffer, i.e. remvoe all headroom and treat the msgb as completely empty. It also initializes the control buffer to zero. </p>
<p class="reference">References <a class="el" href="structmsgb.html#a61fa77b4345e3a6db6d58a39c5e83177">_data</a>, <a class="el" href="structmsgb.html#a031626e62e3cd95929910a78b58e27a8">cb</a>, <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#afb91181f130ef44fea8cacd94bf2d516">head</a>, <a class="el" href="structmsgb.html#a078a458fb0d6f2dd10a95cb1344ad385">l2h</a>, <a class="el" href="structmsgb.html#a6bffebeedd2a24ecafd656cf6136a1eb">l3h</a>, <a class="el" href="structmsgb.html#aba32a66d2e545ceed675bbba031ad5fc">l4h</a>, <a class="el" href="structmsgb.html#a61f8ce8f46dafe4f0d327beea9153098">lchan</a>, <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga1d57bb92a849857deb6871446d3230da">◆ </a></span>msgb_set_talloc_ctx()</h2>
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<td class="memname">void msgb_set_talloc_ctx </td>
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<td class="paramtype">void * </td>
<td class="paramname"><em>ctx</em></td><td>)</td>
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<p>Set the talloc context for <a class="el" href="group__msgb.html#ga25906d049cbad1bf2d5a785319268ea8">msgb_alloc</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">ctx</td><td>talloc context to be used as root for msgb allocations </td></tr>
</table>
</dd>
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<h2 class="memtitle"><span class="permalink"><a href="#ga14ba72cbede82dddeece5838969d064c">◆ </a></span>msgb_tailroom()</h2>
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<td class="memname">static int msgb_tailroom </td>
<td>(</td>
<td class="paramtype">const struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msgb</em></td><td>)</td>
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<p>determine how much tail room is left in msgb </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msgb</td><td>message buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>number of bytes remaining at end of msgb</dd></dl>
<p>This function computes the amount of octets left in the underlying data buffer after the end of the message. </p>
<p class="reference">References <a class="el" href="structmsgb.html#ad9e56fcc205b34f6ae481b64c197b44d">data_len</a>, <a class="el" href="structmsgb.html#afb91181f130ef44fea8cacd94bf2d516">head</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#gab3d4e62c08a29ddb73c00eab4b3f2e91">msgb_put()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga9c64d044b82dc23de865fadc8533249e">◆ </a></span>msgb_trim()</h2>
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<td class="memname">static int msgb_trim </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structmsgb.html">msgb</a> * </td>
<td class="paramname"><em>msg</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>len</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Trim the msgb to a given absolute length. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>message buffer </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">len</td><td>new total length of buffer </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 in case of success, negative in case of error </dd></dl>
<p class="reference">References <a class="el" href="structmsgb.html#a3a36fd9330070d1e56d0503dde190803">data</a>, <a class="el" href="structmsgb.html#ad9e56fcc205b34f6ae481b64c197b44d">data_len</a>, <a class="el" href="structmsgb.html#a14fb7865aeb5b81cb00e9c643c29a810">len</a>, and <a class="el" href="structmsgb.html#a8caeb3b88050ba337edde4fd90741d85">tail</a>.</p>
<p class="reference">Referenced by <a class="el" href="group__msgb.html#gadcf2bccabb0370141eebdc32aca77d30">msgb_l3trim()</a>.</p>
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