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import of dnsmasq-2.56.tar.gz

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This commit is contained in:
Simon Kelley
2011-02-14 20:19:14 +00:00
parent c52e189734
commit 28866e9567
39 changed files with 5141 additions and 4286 deletions
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115
src/netlink.c
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@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -30,6 +30,10 @@
# include <linux/if_addr.h>
#endif
#ifndef NDA_RTA
# define NDA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
static struct iovec iov;
static u32 netlink_pid;
@@ -122,13 +126,14 @@ static ssize_t netlink_recv(void)
return rc;
}
int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
/* family = AF_UNSPEC finds ARP table entries. */
int iface_enumerate(int family, void *parm, int (*callback)())
{
struct sockaddr_nl addr;
struct nlmsghdr *h;
ssize_t len;
static unsigned int seq = 0;
int family = AF_INET;
struct {
struct nlmsghdr nlh;
@@ -142,7 +147,7 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
again:
req.nlh.nlmsg_len = sizeof(req);
req.nlh.nlmsg_type = RTM_GETADDR;
req.nlh.nlmsg_type = family == AF_UNSPEC ? RTM_GETNEIGH : RTM_GETADDR;
req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST | NLM_F_ACK;
req.nlh.nlmsg_pid = 0;
req.nlh.nlmsg_seq = ++seq;
@@ -173,66 +178,84 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
else if (h->nlmsg_type == NLMSG_ERROR)
nl_err(h);
else if (h->nlmsg_type == NLMSG_DONE)
{
#ifdef HAVE_IPV6
if (family == AF_INET && ipv6_callback)
{
family = AF_INET6;
goto again;
}
#endif
return 1;
}
else if (h->nlmsg_type == RTM_NEWADDR)
return 1;
else if (h->nlmsg_type == RTM_NEWADDR && family != AF_UNSPEC)
{
struct ifaddrmsg *ifa = NLMSG_DATA(h);
struct rtattr *rta = IFA_RTA(ifa);
unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa));
if (ifa->ifa_family == AF_INET)
if (ifa->ifa_family == family)
{
struct in_addr netmask, addr, broadcast;
netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
addr.s_addr = 0;
broadcast.s_addr = 0;
while (RTA_OK(rta, len1))
if (ifa->ifa_family == AF_INET)
{
if (rta->rta_type == IFA_LOCAL)
addr = *((struct in_addr *)(rta+1));
else if (rta->rta_type == IFA_BROADCAST)
broadcast = *((struct in_addr *)(rta+1));
struct in_addr netmask, addr, broadcast;
rta = RTA_NEXT(rta, len1);
netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
addr.s_addr = 0;
broadcast.s_addr = 0;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == IFA_LOCAL)
addr = *((struct in_addr *)(rta+1));
else if (rta->rta_type == IFA_BROADCAST)
broadcast = *((struct in_addr *)(rta+1));
rta = RTA_NEXT(rta, len1);
}
if (addr.s_addr)
if (!((*callback)(addr, ifa->ifa_index, netmask, broadcast, parm)))
return 0;
}
if (addr.s_addr && ipv4_callback)
if (!((*ipv4_callback)(addr, ifa->ifa_index, netmask, broadcast, parm)))
return 0;
}
#ifdef HAVE_IPV6
else if (ifa->ifa_family == AF_INET6)
{
struct in6_addr *addrp = NULL;
while (RTA_OK(rta, len1))
else if (ifa->ifa_family == AF_INET6)
{
if (rta->rta_type == IFA_ADDRESS)
addrp = ((struct in6_addr *)(rta+1));
struct in6_addr *addrp = NULL;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == IFA_ADDRESS)
addrp = ((struct in6_addr *)(rta+1));
rta = RTA_NEXT(rta, len1);
}
rta = RTA_NEXT(rta, len1);
if (addrp)
if (!((*callback)(addrp, ifa->ifa_index, ifa->ifa_index, parm)))
return 0;
}
#endif
}
}
else if (h->nlmsg_type == RTM_NEWNEIGH && family == AF_UNSPEC)
{
struct ndmsg *neigh = NLMSG_DATA(h);
struct rtattr *rta = NDA_RTA(neigh);
unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*neigh));
size_t maclen = 0;
char *inaddr = NULL, *mac = NULL;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == NDA_DST)
inaddr = (char *)(rta+1);
else if (rta->rta_type == NDA_LLADDR)
{
maclen = rta->rta_len - sizeof(struct rtattr);
mac = (char *)(rta+1);
}
if (addrp && ipv6_callback)
if (!((*ipv6_callback)(addrp, ifa->ifa_index, ifa->ifa_index, parm)))
return 0;
rta = RTA_NEXT(rta, len1);
}
#endif
}
if (inaddr && mac)
if (!((*callback)(neigh->ndm_family, inaddr, mac, maclen, parm)))
return 0;
}
}
}
void netlink_multicast(void)
{
ssize_t len;