.\"O on the
.\"O .I msghdr
.\"O to get the first control message and
-.\"O .BR CMSG_NEXTHDR ()
+.\"O .BR CMSG_NXTHDR ()
.\"O to get all subsequent ones.
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.I msghdr
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.I msghdr
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-.BR CMSG_NEXTHDR ()
+.BR CMSG_NXTHDR ()
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.\"O In each control message, initialize
.\"O .I cmsg_len