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16<title>mtcp_getsockname</title>
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21<h1 align="center">mtcp_getsockname</h1>
22<!--
23<a href="#NAME">NAME</a><br>
24<a href="#SYNOPSIS">SYNOPSIS</a><br>
25<a href="#DESCRIPTION">DESCRIPTION</a><br>
26<a href="#RETURN VALUE">RETURN VALUE</a><br>
27<a href="#ERRORS">ERRORS</a><br>
28<a href="#NOTES">NOTES</a><br>
29<a href="#AUTHORS">AUTHORS</a><br>
30<a href="#SEE ALSO">SEE ALSO</a><br>
31<a href="#COLOPHON">COLOPHON</a><br>
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34
35<h2>NAME
36<a name="NAME"></a>
37</h2>
38
39
40
41<p style="margin-left:11%; margin-top: 1em">mtcp_getsockname
42&minus; get socket name</p>
43
44<h2>SYNOPSIS
45<a name="SYNOPSIS"></a>
46</h2>
47
48
49<p style="margin-left:11%; margin-top: 1em"><b>#include
50&lt;mtcp_api.h&gt;</b></p>
51
52<p style="margin-left:11%; margin-top: 1em"><b>int
53mtcp_getsockname(mctx_t</b> <i>mctx</i><b>, int</b>
54<i>sockfd</i><b>, struct sockaddr *</b><i>addr</i><b>,
55socklen_t *</b><i>addrlen</i><b>);</b></p>
56
57<h2>DESCRIPTION
58<a name="DESCRIPTION"></a>
59</h2>
60
61
62
63<p style="margin-left:11%; margin-top: 1em"><b>mtcp_getsockname</b>()
64returns the current address to which the socket
65<i>sockfd</i> is bound, in the buffer pointed to by
66<i>addr.</i> The <i>addrlen</i> argument should be
67initialized to indicate the amount of space (in bytes)
68pointed to by <i>addr.</i> On return it contains the actual
69size of the socket address.</p>
70
71<p style="margin-left:11%; margin-top: 1em">An
72<b>mtcp_getsockname</b>() call takes an additional argument
73named <i>mctx</i> that represents the per-core mTCP context
74in an application (see <b>mtcp_create_context()</b> for
75details).</p>
76
77<h2>RETURN VALUE
78<a name="RETURN VALUE"></a>
79</h2>
80
81
82<p style="margin-left:11%; margin-top: 1em">Returns zero on
83success; -1 on failure. In case of failure, <i>errno</i> is
84set appropriately.</p>
85
86<h2>ERRORS
87<a name="ERRORS"></a>
88</h2>
89
90
91<table width="100%" border="0" rules="none" frame="void"
92       cellspacing="0" cellpadding="0">
93<tr valign="top" align="left">
94<td width="11%"></td>
95<td width="12%">
96
97
98<p style="margin-top: 1em"><b>EBADF</b></p></td>
99<td width="3%"></td>
100<td width="74%">
101
102
103<p style="margin-top: 1em">The argument <i>sockfd</i> is
104not a valid socket descriptor.</p></td></tr>
105<tr valign="top" align="left">
106<td width="11%"></td>
107<td width="12%">
108
109
110<p><b>EINVAL</b></p></td>
111<td width="3%"></td>
112<td width="74%">
113
114
115<p><i>addrlen</i> argument is invalid (e.g., is
116negative).</p> </td></tr>
117<tr valign="top" align="left">
118<td width="11%"></td>
119<td width="12%">
120
121
122<p><b>ENOTSOCK</b></p></td>
123<td width="3%"></td>
124<td width="74%">
125
126
127<p>The argument <i>sockfd</i> is pointing to an invalid
128mTCP socket.</p></td></tr>
129</table>
130
131<h2>NOTES
132<a name="NOTES"></a>
133</h2>
134
135
136<p style="margin-left:11%; margin-top: 1em">The third
137argument of <b>mtcp_getsockname()</b> is in reality an
138<i>int *</i> (and this is what 4.x BSD and libc4 and libc5
139have). Some POSIX confusion resulted in the present
140<i>socklen_t ,</i> also used by glibc.</p>
141
142<h2>AUTHORS
143<a name="AUTHORS"></a>
144</h2>
145
146
147<p style="margin-left:11%; margin-top: 1em">mOS
148development team &lt;[email protected]&gt;</p>
149
150<h2>SEE ALSO
151<a name="SEE ALSO"></a>
152</h2>
153
154
155
156<p style="margin-left:11%; margin-top: 1em"><b>mtcp_bind</b>(),
157<b>mtcp_socket</b>()</p>
158
159<h2>COLOPHON
160<a name="COLOPHON"></a>
161</h2>
162
163
164<p style="margin-left:11%; margin-top: 1em">This page is
165part of mOS release 0.3 <i>docs</i> section. A description
166of the project, and information about reporting bugs, can be
167found at http://mos.kaist.edu/.</p>
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