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2004-07-23 Paul Jakma <paul@dishone.st>
* sockopt.h: Add SOPT_SIZE_CMSG_PKTINFO{_IPV{4,6}} define, for
sizeof pktinfo as appropriate, to be used when allocating msg
buffers. export setsockopt_pktinfo() and
getsockopt_pktinfo_ifindex()
* sockopt.c: (setsockopt_pktinfo_ifindex) new function to portably
set received ifindex sock option.
(getsockopt_pktinfo_ifindex) portably retrieve ifindex.
(getsockopt_cmsg_data) retrieve indicated control info from
message header.
(getsockopt_ipv6_pktinfo_ifindex) ipv6 version of above.
(setsockopt_ipv4_pktinfo) v4 version
(setsockopt_pktinfo) the exported version
(getsockopt_ipv4_pktinfo_ifindex) v4 specific version
(getsockopt_pktinfo_ifindex) the exported version
This commit is contained in:
paul
parent
05c447dd2e
commit
4f7baa0e43
@ -1,3 +1,20 @@
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2004-07-23 Paul Jakma <paul@dishone.st>
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* sockopt.h: Add SOPT_SIZE_CMSG_PKTINFO{_IPV{4,6}} define, for
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sizeof pktinfo as appropriate, to be used when allocating msg
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buffers. export setsockopt_pktinfo() and
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getsockopt_pktinfo_ifindex()
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* sockopt.c: (setsockopt_pktinfo_ifindex) new function to portably
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set received ifindex sock option.
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(getsockopt_pktinfo_ifindex) portably retrieve ifindex.
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(getsockopt_cmsg_data) retrieve indicated control info from
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message header.
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(getsockopt_ipv6_pktinfo_ifindex) ipv6 version of above.
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(setsockopt_ipv4_pktinfo) v4 version
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(setsockopt_pktinfo) the exported version
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(getsockopt_ipv4_pktinfo_ifindex) v4 specific version
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(getsockopt_pktinfo_ifindex) the exported version
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2004-07-14 Paul Jakma <paul@dishone.st>
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* sigevent.c: (quagga_signal_handler) add a global caught flag, set
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124
lib/sockopt.c
124
lib/sockopt.c
@ -22,6 +22,19 @@
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#include <zebra.h>
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#include "log.h"
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static void *
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getsockopt_cmsg_data (struct msghdr *msgh, int level, int type)
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{
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struct cmsghdr *cmsg;
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void *ptr = NULL;
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for (cmsg = CMSG_FIRSTHDR(msgh);
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cmsg != NULL;
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cmsg = CMSG_NXTHDR(msgh, cmsg))
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if (cmsg->cmsg_level == level && cmsg->cmsg_type)
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return (ptr = CMSG_DATA(cmsg));
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}
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#ifdef HAVE_IPV6
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/* Set IPv6 packet info to the socket. */
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int
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@ -111,6 +124,15 @@ setsockopt_ipv6_multicast_loop (int sock, int val)
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return ret;
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}
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static int
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getsockopt_ipv6_pktinfo_ifindex (struct msghdr *msgh)
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{
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struct in6_pktinfo *pktinfo;
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pktinfo = getsockopt_cmsg_data (msgh, IPPROTO_IPV6, IPV6_PKTINFO);
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return pktinfo->ipi6_ifindex;
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}
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#endif /* HAVE_IPV6 */
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@ -197,3 +219,105 @@ setsockopt_multicast_ipv4(int sock,
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#endif /* #if OS_TYPE */
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}
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static int
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setsockopt_ipv4_pktinfo (int sock, int val)
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{
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int ret;
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#if defined (IP_PKTINFO)
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ret = setsockopt (sock, IPPROTO_IP, IP_PKTINFO, &val, sizeof (val));
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#elif defined (IP_RECVIF)
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ret = setsockopt (sock, IPPROTO_IP, IP_RECVIF, &val, sizeof (val));
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#else
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#warning "Neither IP_PKTINFO nor IP_RECVIF is available."
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#warning "Will not be able to receive link info."
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#warning "Things might be seriously broken.."
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#endif
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if (ret < 0)
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zlog_warn ("Can't set IP_PKTINFO option");
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return ret;
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}
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/* set appropriate pktinfo socket option
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* on systems without PKTINFO, sets RECVIF, which only retrieves
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* interface index.
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*/
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int
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setsockopt_pktinfo (int af, int sock, int val)
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{
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int ret = -1;
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switch (af)
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{
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case AF_INET:
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ret = setsockopt_ipv4_pktinfo (sock, val);
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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ret = setsockopt_ipv6_pktinfo (sock, val);
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break;
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#endif
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default:
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zlog_warn ("setsockopt_pktinfo: unknown address family %d");
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}
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return ret;
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}
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static int
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getsockopt_ipv4_pktinfo_ifindex (struct msghdr *msgh)
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{
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int ifindex = 0;
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#if defined (IP_PKTINFO)
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struct in_pktinfo *pktinfo;
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#elif defined (IP_REVCIF)
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#ifndef SUNOS_5
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struct sockaddr_dl *sdl;
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#endif /* SUNOS_5 */
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#else /* IP_RECVIF */
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char *pktinfo;
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#endif /* IP_PKTINFO */
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#ifdef IP_PKTINFO
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pktinfo =
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(struct in_pktinfo *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_PKTINFO);
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#elif defined (IP_RECVIF)
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#ifdef SUNOS_5
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ifindex = *(uint_t *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_RECVIF);
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#else
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pktinfo =
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(struct sockaddr_dl *)getsockopt_cmsg_data (msgh, IPPROTO_IP, IP_RECVIF);
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ifindex = pktinfo->sdl_index;
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#endif /* SUNOS_5 */
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#else
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#warning "getsockopt_ipv4_pktinfo_ifindex: dont have PKTINFO or RECVIF"
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ifindex = 0;
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#endif /* IP_PKTINFO */
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return ifindex;
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}
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/* return ifindex, 0 if none found */
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int
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getsockopt_pktinfo_ifindex (int af, struct msghdr *msgh)
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{
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int ifindex = 0;
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switch (af)
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{
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case AF_INET:
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return (getsockopt_ipv4_pktinfo_ifindex (msgh));
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break;
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#ifdef HAVE_IPV6
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case AF_INET6:
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return (getsockopt_ipv6_pktinfo_ifindex (msgh));
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break;
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#endif
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default:
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zlog_warn ("getsockopt_pktinfo_ifindex: unknown address family %d");
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return (ifindex = 0);
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}
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}
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@ -31,11 +31,27 @@ int setsockopt_ipv6_hoplimit (int, int);
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int setsockopt_ipv6_multicast_loop (int, int);
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#endif /* HAVE_IPV6 */
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#if defined (IP_PKTINFO)
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#define SOPT_SIZE_CMSG_PKTINFO_IPV4() (sizeof (struct in_pktinfo))
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#elif defined (IP_RECVIF)
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#if defined (SUNOS_5)
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#define SOPT_SIZE_CMSG_PKTINFO_IPV4() (sizeof (uint_t))
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#else
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#define SOPT_SIZE_CMSG_PKTINFO_IPV4() (sizeof (struct sockaddr_dl))
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#endif /* SUNOS_5 */
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#endif
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#define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof (struct in6_pktinfo));
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#define SOPT_SIZE_CMSG_PKTINFO(af) \
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((af == AF_INET) ? SOPT_SIZE_CMSG_PKTINFO_IPV4() \
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: SOPT_SIZE_CMSG_PKTINFO_IPV6()
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int setsockopt_multicast_ipv4(int sock,
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int optname,
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struct in_addr if_addr,
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unsigned int mcast_addr,
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unsigned int ifindex);
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int setsockopt_pktinfo (int, int, int);
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int getsockopt_pktinfo_ifindex (int, struct msghdr *);
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#endif /*_ZEBRA_SOCKOPT_H */
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