diff -urN uClibc-0.9.30.1.orig/include/netinet/igmp.h uClibc-0.9.30.1/include/netinet/igmp.h

 --- uClibc-0.9.30.1.orig/include/netinet/igmp.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/igmp.h	2009-04-08 09:00:26.242514273 +0200

 @@ -69,7 +69,7 @@

    u_int8_t igmp_code;             /* routing code */

    u_int16_t igmp_cksum;           /* checksum */

    struct in_addr igmp_group;      /* group address */

 -};

 +} __attribute__ ((__packed__));

  #define IGMP_MINLEN			8

 diff -urN uClibc-0.9.30.1.orig/include/netinet/in.h uClibc-0.9.30.1/include/netinet/in.h

 --- uClibc-0.9.30.1.orig/include/netinet/in.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/in.h	2009-04-08 09:00:26.242514273 +0200

 @@ -202,7 +202,7 @@

  #define s6_addr			in6_u.u6_addr8

  #define s6_addr16		in6_u.u6_addr16

  #define s6_addr32		in6_u.u6_addr32

 -  };

 +  } __attribute__ ((__packed__));

  extern const struct in6_addr in6addr_any;        /* :: */

  extern const struct in6_addr in6addr_loopback;   /* ::1 */

 @@ -229,7 +229,7 @@

  			   __SOCKADDR_COMMON_SIZE -

  			   sizeof (in_port_t) -

  			   sizeof (struct in_addr)];

 -  };

 +  } __attribute__ ((__packed__));

  #endif

  /* Ditto, for IPv6.  */

 @@ -240,7 +240,7 @@

      uint32_t sin6_flowinfo;	/* IPv6 flow information */

      struct in6_addr sin6_addr;	/* IPv6 address */

      uint32_t sin6_scope_id;	/* IPv6 scope-id */

 -  };

 +  } __attribute__ ((__packed__));

  /* IPv4 multicast request.  */

 @@ -251,7 +251,7 @@

      /* Local IP address of interface.  */

      struct in_addr imr_interface;

 -  };

 +  } __attribute__ ((__packed__));

  struct ip_mreq_source

    {

 @@ -263,7 +263,7 @@

      /* IP address of interface.  */

      struct in_addr imr_sourceaddr;

 -  };

 +  } __attribute__ ((__packed__));

  /* Likewise, for IPv6.  */

  struct ipv6_mreq

 @@ -273,7 +273,7 @@

      /* local interface */

      unsigned int ipv6mr_interface;

 -  };

 +  } __attribute__ ((__packed__));

  /* Multicast group request.  */

 @@ -284,7 +284,7 @@

      /* Group address.  */

      struct sockaddr_storage gr_group;

 -  };

 +  } __attribute__ ((__packed__));

  struct group_source_req

    {

 @@ -296,7 +296,7 @@

      /* Source address.  */

      struct sockaddr_storage gsr_source;

 -  };

 +  } __attribute__ ((__packed__));

  /* Full-state filter operations.  */

 @@ -315,7 +315,7 @@

      uint32_t imsf_numsrc;

      /* Source addresses.  */

      struct in_addr imsf_slist[1];

 -  };

 +  } __attribute__ ((__packed__));

  #define IP_MSFILTER_SIZE(numsrc) (sizeof (struct ip_msfilter) \

  				  - sizeof (struct in_addr)		      \

 @@ -336,7 +336,7 @@

      uint32_t gf_numsrc;

      /* Source addresses.  */

      struct sockaddr_storage gf_slist[1];

 -};

 +} __attribute__ ((__packed__));

  #define GROUP_FILTER_SIZE(numsrc) (sizeof (struct group_filter) \

  				   - sizeof (struct sockaddr_storage)	      \

 @@ -460,14 +460,14 @@

    {

      struct in6_addr ipi6_addr;	/* src/dst IPv6 address */

      unsigned int ipi6_ifindex;	/* send/recv interface index */

 -  };

 +  } __attribute__ ((__packed__));

  /* IPv6 MTU information.  */

  struct ip6_mtuinfo

    {

      struct sockaddr_in6 ip6m_addr; /* dst address including zone ID */

      uint32_t ip6m_mtu;		   /* path MTU in host byte order */

 -  };

 +  } __attribute__ ((__packed__));

  #if 0 /*def __USE_GNU*/

 diff -urN uClibc-0.9.30.1.orig/include/netinet/ip.h uClibc-0.9.30.1/include/netinet/ip.h

 --- uClibc-0.9.30.1.orig/include/netinet/ip.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/ip.h	2009-04-08 09:00:26.242514273 +0200

 @@ -63,7 +63,7 @@

      u_int32_t saddr;

      u_int32_t daddr;

      /*The options start here. */

 -  };

 +  } __attribute__ ((__packed__));

  #ifdef __USE_BSD

  /*

 @@ -127,7 +127,7 @@

      u_int8_t ip_p;			/* protocol */

      u_short ip_sum;			/* checksum */

      struct in_addr ip_src, ip_dst;	/* source and dest address */

 -  };

 +  } __attribute__ ((__packed__));

  /*

   * Time stamp option structure.

 diff -urN uClibc-0.9.30.1.orig/include/netinet/ip_icmp.h uClibc-0.9.30.1/include/netinet/ip_icmp.h

 --- uClibc-0.9.30.1.orig/include/netinet/ip_icmp.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/ip_icmp.h	2009-04-08 09:00:26.242514273 +0200

 @@ -43,7 +43,7 @@

        u_int16_t	mtu;

      } frag;			/* path mtu discovery */

    } un;

 -};

 +} __attribute__ ((__packed__));

  #define ICMP_ECHOREPLY		0	/* Echo Reply			*/

  #define ICMP_DEST_UNREACH	3	/* Destination Unreachable	*/

 @@ -199,7 +199,7 @@

  #define	icmp_radv	icmp_dun.id_radv

  #define	icmp_mask	icmp_dun.id_mask

  #define	icmp_data	icmp_dun.id_data

 -};

 +} __attribute__ ((__packed__));

  /*

   * Lower bounds on packet lengths for various types.

 diff -urN uClibc-0.9.30.1.orig/include/netinet/tcp.h uClibc-0.9.30.1/include/netinet/tcp.h

 --- uClibc-0.9.30.1.orig/include/netinet/tcp.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/tcp.h	2009-04-08 09:00:26.242514273 +0200

 @@ -86,7 +86,7 @@

      u_int16_t th_win;		/* window */

      u_int16_t th_sum;		/* checksum */

      u_int16_t th_urp;		/* urgent pointer */

 -};

 +} __attribute__ ((__packed__));

  # else /* !__FAVOR_BSD */

  struct tcphdr

 @@ -121,7 +121,7 @@

      u_int16_t window;

      u_int16_t check;

      u_int16_t urg_ptr;

 -};

 +} __attribute__ ((__packed__));

  # endif /* __FAVOR_BSD */

  enum

 @@ -226,7 +226,7 @@

    u_int32_t	tcpi_rcv_space;

    u_int32_t	tcpi_total_retrans;

 -};

 +} __attribute__ ((__packed__));

  /* For TCP_MD5SIG socket option.  */

 @@ -239,7 +239,7 @@

    u_int16_t	tcpm_keylen;			/* Key length.  */

    u_int32_t	__tcpm_pad2;			/* Zero.  */

    u_int8_t	tcpm_key[TCP_MD5SIG_MAXKEYLEN];	/* Key (binary).  */

 -};

 +} __attribute__ ((__packed__));

  #endif /* Misc.  */

 diff -urN uClibc-0.9.30.1.orig/include/netinet/udp.h uClibc-0.9.30.1/include/netinet/udp.h

 --- uClibc-0.9.30.1.orig/include/netinet/udp.h	2009-04-08 09:00:10.926545132 +0200

 +++ uClibc-0.9.30.1/include/netinet/udp.h	2009-04-08 09:00:26.242514273 +0200

 @@ -61,7 +61,7 @@

    u_int16_t uh_dport;		/* destination port */

    u_int16_t uh_ulen;		/* udp length */

    u_int16_t uh_sum;		/* udp checksum */

 -};

 +} __attribute__ ((__packed__));

  #else

 @@ -71,7 +71,7 @@

    u_int16_t dest;

    u_int16_t len;

    u_int16_t check;

 -};

 +} __attribute__ ((__packed__));

  #endif

  #define SOL_UDP            17      /* sockopt level for UDP */