author | Petr Sumbera <petr.sumbera@oracle.com> |
Fri, 22 Jul 2016 04:36:18 -0700 | |
branch | s11u3-sru |
changeset 6466 | 7e3ad86b966b |
parent 3028 | 5e73a3a3f66a |
permissions | -rw-r--r-- |
3028
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If there are multiple datalinks configured with IP addresses from the same |
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subnet, then the datalink to which an on-link device's ARP entry will be |
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associated depends on the order in which these datalinks were plumbed with |
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IP addresses. In that, the datalink that was plumbed for IP last will have |
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the ARP entry associated against it. To avoid, this we need to use |
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SIOCSXARP ioctl to specify the exact datalink. |
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|
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8 |
This patch was developed in-house. Since it is Solaris-specific it is not |
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suitable for upstream. |
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|
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--- dnsmasq-2.68/src/dhcp.c 2013-12-08 07:58:29.000000000 -0800 |
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+++ ORIGINAL/src/dhcp.c 2014-03-07 10:14:16.639192664 -0800 |
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@@ -418,17 +418,24 @@ |
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else |
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{ |
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/* unicast to unconfigured client. Inject mac address direct into ARP cache. |
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- Note that this only works for ethernet on solaris, because we use SIOCSARP |
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- and not SIOCSXARP, which would be perfect, except that it returns ENXIO |
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- mysteriously. Bah. Fall back to broadcast for other net types. */ |
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- struct arpreq req; |
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+ Fall back to broadcast for other net types. */ |
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+ struct xarpreq xreq; |
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+ int ifnamsz = strlen(ifr.ifr_name); |
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+ |
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+ dest.sin_family = AF_INET; |
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dest.sin_addr = mess->yiaddr; |
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dest.sin_port = htons(daemon->dhcp_client_port); |
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- *((struct sockaddr_in *)&req.arp_pa) = dest; |
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- req.arp_ha.sa_family = AF_UNSPEC; |
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- memcpy(req.arp_ha.sa_data, mess->chaddr, mess->hlen); |
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- req.arp_flags = ATF_COM; |
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- ioctl(daemon->dhcpfd, SIOCSARP, &req); |
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+ *((struct sockaddr_in *)&xreq.xarp_pa) = dest; |
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+ xreq.xarp_ha.sdl_nlen = ifnamsz; |
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+ memcpy(xreq.xarp_ha.sdl_data, ifr.ifr_name, ifnamsz); |
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+ xreq.xarp_ha.sdl_family = AF_LINK; |
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+ xreq.xarp_ha.sdl_index = iface_index; |
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+ /* 6 corresponds to IFT_ETHER */ |
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+ xreq.xarp_ha.sdl_type = 6; |
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+ xreq.xarp_ha.sdl_alen = ETHER_ADDR_LEN; |
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+ memcpy(xreq.xarp_ha.sdl_data + ifnamsz, mess->chaddr, mess->hlen); |
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+ xreq.xarp_flags = ATF_COM; |
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+ ioctl(daemon->dhcpfd, SIOCSXARP, &xreq); |
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} |
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#elif defined(HAVE_BSD_NETWORK) |
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else |