diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/Dist | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/Makefile | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/cmsg_nxthdr.c | 38 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/netinet/in.h | 24 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/socketbits.h | 41 |
5 files changed, 94 insertions, 11 deletions
diff --git a/sysdeps/unix/sysv/linux/Dist b/sysdeps/unix/sysv/linux/Dist index c5a2f179ee..b757562124 100644 --- a/sysdeps/unix/sysv/linux/Dist +++ b/sysdeps/unix/sysv/linux/Dist @@ -1,3 +1,4 @@ +cmsg_nxthdr.c init-first.h kernel_sigaction.h llseek.c diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index ae2e294785..e02ee8cfe4 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -35,6 +35,7 @@ endif ifeq ($(subdir),socket) sysdep_headers += sys/socketcall.h net/if.h net/if_ppp.h net/ppp-comp.h \ net/ppp_defs.h net/if_arp.h net/route.h +sysdep_routines += cmsg_nxthdr endif ifeq ($(subdir),sunrpc) diff --git a/sysdeps/unix/sysv/linux/cmsg_nxthdr.c b/sysdeps/unix/sysv/linux/cmsg_nxthdr.c new file mode 100644 index 0000000000..2245db7f25 --- /dev/null +++ b/sysdeps/unix/sysv/linux/cmsg_nxthdr.c @@ -0,0 +1,38 @@ +/* Return point to next ancillary data entry in message header. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sys/socket.h> + + +struct cmsghdr * +__cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg) +{ + unsigned char *p; + + if ((size_t) cmsg->cmsg_len < sizeof (struct cmsghdr)) + /* The kernel header does this so there may be a reason. */ + return NULL; + + p = (((unsigned char *) cmsg) + + ((cmsg->cmsg_len + sizeof (long int) - 1) & ~sizeof (long int))); + if (p >= (unsigned char *) mhdr->msg_control + mhdr->msg_controllen) + /* No more entries. */ + return NULL; + return (struct cmsghdr *) p; +} diff --git a/sysdeps/unix/sysv/linux/netinet/in.h b/sysdeps/unix/sysv/linux/netinet/in.h index c1df8250c0..0fec8ce3dd 100644 --- a/sysdeps/unix/sysv/linux/netinet/in.h +++ b/sysdeps/unix/sysv/linux/netinet/in.h @@ -27,17 +27,19 @@ /* Standard well-defined IP protocols. */ enum { - IPPROTO_IP = 0, /* Dummy protocol for TCP. */ - IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ - IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ - IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ - IPPROTO_TCP = 6, /* Transmission Control Protocol. */ - IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ - IPPROTO_PUP = 12, /* PUP protocol. */ - IPPROTO_UDP = 17, /* User Datagram Protocol. */ - IPPROTO_IDP = 22, /* XNS IDP protocol. */ - - IPPROTO_RAW = 255, /* Raw IP packets. */ + IPPROTO_IP = 0, /* Dummy protocol for TCP. */ + IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ + IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ + IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ + IPPROTO_TCP = 6, /* Transmission Control Protocol. */ + IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ + IPPROTO_PUP = 12, /* PUP protocol. */ + IPPROTO_UDP = 17, /* User Datagram Protocol. */ + IPPROTO_IDP = 22, /* XNS IDP protocol. */ + IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling. */ + IPPROTO_ICMPV6 = 58, /* ICMPv6. */ + + IPPROTO_RAW = 255, /* Raw IP packets. */ IPPROTO_MAX }; diff --git a/sysdeps/unix/sysv/linux/socketbits.h b/sysdeps/unix/sysv/linux/socketbits.h index 1cf44b4347..91deb6c815 100644 --- a/sysdeps/unix/sysv/linux/socketbits.h +++ b/sysdeps/unix/sysv/linux/socketbits.h @@ -126,6 +126,47 @@ struct msghdr int msg_flags; /* Flags on received message. */ }; +/* Structure used for storage of ancillary data object information. */ +struct cmsghdr + { + int cmsg_len; /* Length of data in cmsg_data plus length + of cmsghdr structure. */ + /* XXX Should be type `size_t' according to POSIX.1g. */ + int cmsg_level; /* Originating protocol. */ + int cmsg_type; /* Protocol specific type. */ + unsigned char __cmsg_data[0]; /* Ancillary data. */ + }; + +/* Ancillary data object manipulation macros. */ +#define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data) +#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg) +#define CMSG_FIRSTHDR(mhdr) (mhdr) \ + ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \ + ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL) + + +#ifndef _EXTERN_INLINE +# define _EXTERN_INLINE extern __inline +#endif +extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr, + struct cmsghdr *__cmsg)); +_EXTERN_INLINE struct cmsghdr * +__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg) +{ + unsigned char *__p; + + if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr)) + /* The kernel header does this so there may be a reason. */ + return NULL; + + __p = (((unsigned char *) __cmsg) + + ((__cmsg->cmsg_len + sizeof (long int) - 1) & ~sizeof (long int))); + if (__p >= (unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen) + /* No more entries. */ + return NULL; + return (struct cmsghdr *) __p; +} + /* Get socket manipulation related informations from kernel headers. */ #include <asm/socket.h> |