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AF_LINK and sockaddr_dl

From: Pino Toscano
Subject: AF_LINK and sockaddr_dl
Date: Wed, 20 Jun 2012 21:08:35 +0200
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in glibc, our bits/socket.h defines PF_LINK/AF_LINK; these seem to be 
BSD feature, associated with the struct sockaddr_dl (which we do not 
have), provided by <if_dl.h>.
It is not that uncommon for packages checking content of sockaddr 
structs to do code like:

  #ifdef AF_INET
    if (sa->sa_family == AF_INET) {
      struct sockaddr_in *sa_in = (struct sockaddr_in *)sa;
  #ifdef AF_LINK
    if (sa->sa_family == AF_LINK) {
      struct sockaddr_dl *sa_in = (struct sockaddr_dl *)sa;

Would a patch for glibc that #if 0/comments out the PF_LINK/AF_LINK 
defines be the right solution?

Pino Toscano

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