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import of dnsmasq-2.36.tar.gz

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This commit is contained in:
Simon Kelley
2007-01-21 20:01:28 +00:00
parent 4011c4e05e
commit 832af0bafb
31 changed files with 5064 additions and 2851 deletions
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102
src/network.c
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@@ -12,7 +12,8 @@
#include "dnsmasq.h"
int iface_check(struct daemon *daemon, int family, struct all_addr *addr, char *name)
int iface_check(struct daemon *daemon, int family, struct all_addr *addr,
struct ifreq *ifr, int *indexp)
{
struct iname *tmp;
int ret = 1;
@@ -20,16 +21,49 @@ int iface_check(struct daemon *daemon, int family, struct all_addr *addr, char *
/* Note: have to check all and not bail out early, so that we set the
"used" flags. */
if (daemon->if_names || daemon->if_addrs)
if (indexp)
{
#if defined(__FreeBSD__) || defined(__DragonFly__)
/* One form of bridging on FreeBSD has the property that packets
can be recieved on bridge interfaces which do not have an IP address.
We allow these to be treated as aliases of another interface which does have
an IP address with --dhcp-bridge=interface,alias,alias */
struct dhcp_bridge *bridge, *alias;
for (bridge = daemon->bridges; bridge; bridge = bridge->next)
{
for (alias = bridge->alias; alias; alias = alias->next)
if (strncmp(ifr->ifr_name, alias->iface, IF_NAMESIZE) == 0)
{
int newindex;
if (!(newindex = if_nametoindex(bridge->iface)))
{
syslog(LOG_WARNING, _("unknown interface %s in bridge-interface"), ifr->ifr_name);
return 0;
}
else
{
*indexp = newindex;
strncpy(ifr->ifr_name, bridge->iface, IF_NAMESIZE);
break;
}
}
if (alias)
break;
}
#endif
}
if (daemon->if_names || (addr && daemon->if_addrs))
{
ret = 0;
for (tmp = daemon->if_names; tmp; tmp = tmp->next)
if (tmp->name && (strcmp(tmp->name, name) == 0))
if (tmp->name && (strcmp(tmp->name, ifr->ifr_name) == 0))
ret = tmp->used = 1;
for (tmp = daemon->if_addrs; tmp; tmp = tmp->next)
if (tmp->addr.sa.sa_family == family)
if (addr && tmp->addr.sa.sa_family == family)
{
if (family == AF_INET &&
tmp->addr.in.sin_addr.s_addr == addr->addr.addr4.s_addr)
@@ -44,7 +78,7 @@ int iface_check(struct daemon *daemon, int family, struct all_addr *addr, char *
}
for (tmp = daemon->if_except; tmp; tmp = tmp->next)
if (tmp->name && (strcmp(tmp->name, name) == 0))
if (tmp->name && (strcmp(tmp->name, ifr->ifr_name) == 0))
ret = 0;
return ret;
@@ -56,6 +90,8 @@ static int iface_allowed(struct daemon *daemon, struct irec **irecp, int if_inde
struct irec *iface;
int fd;
struct ifreq ifr;
int dhcp_ok = 1;
struct iname *tmp;
/* check whether the interface IP has been added already
we call this routine multiple times. */
@@ -109,12 +145,16 @@ static int iface_allowed(struct daemon *daemon, struct irec **irecp, int if_inde
}
if (addr->sa.sa_family == AF_INET &&
!iface_check(daemon, AF_INET, (struct all_addr *)&addr->in.sin_addr, ifr.ifr_name))
!iface_check(daemon, AF_INET, (struct all_addr *)&addr->in.sin_addr, &ifr, NULL))
return 1;
for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
if (tmp->name && (strcmp(tmp->name, ifr.ifr_name) == 0))
dhcp_ok = 0;
#ifdef HAVE_IPV6
if (addr->sa.sa_family == AF_INET6 &&
!iface_check(daemon, AF_INET6, (struct all_addr *)&addr->in6.sin6_addr, ifr.ifr_name))
!iface_check(daemon, AF_INET6, (struct all_addr *)&addr->in6.sin6_addr, &ifr, NULL))
return 1;
#endif
@@ -123,8 +163,9 @@ static int iface_allowed(struct daemon *daemon, struct irec **irecp, int if_inde
{
iface->addr = *addr;
iface->netmask = netmask;
iface->dhcp_ok = dhcp_ok;
iface->next = *irecp;
*irecp = iface;
*irecp = iface;
return 1;
}
@@ -239,6 +280,7 @@ static int create_ipv6_listener(struct listener **link, int port)
l = safe_malloc(sizeof(struct listener));
l->fd = fd;
l->tcpfd = tcpfd;
l->tftpfd = -1;
l->family = AF_INET6;
l->next = NULL;
*link = l;
@@ -247,12 +289,12 @@ static int create_ipv6_listener(struct listener **link, int port)
}
#endif
struct listener *create_wildcard_listeners(int port)
struct listener *create_wildcard_listeners(int port, int have_tftp)
{
union mysockaddr addr;
int opt = 1;
struct listener *l, *l6 = NULL;
int tcpfd, fd;
int tcpfd, fd, tftpfd = -1;
memset(&addr, 0, sizeof(addr));
addr.in.sin_family = AF_INET;
@@ -283,11 +325,32 @@ struct listener *create_wildcard_listeners(int port)
#endif
bind(fd, (struct sockaddr *)&addr, sa_len(&addr)) == -1)
return NULL;
#ifdef HAVE_TFTP
if (have_tftp)
{
addr.in.sin_port = htons(TFTP_PORT);
if ((tftpfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return NULL;
if (setsockopt(tftpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
!fix_fd(tftpfd) ||
#if defined(HAVE_LINUX_NETWORK)
setsockopt(tftpfd, SOL_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1 ||
#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
setsockopt(tftpfd, IPPROTO_IP, IP_RECVDSTADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(tftpfd, IPPROTO_IP, IP_RECVIF, &opt, sizeof(opt)) == -1 ||
#endif
bind(tftpfd, (struct sockaddr *)&addr, sa_len(&addr)) == -1)
return NULL;
}
#endif
l = safe_malloc(sizeof(struct listener));
l->family = AF_INET;
l->fd = fd;
l->tcpfd = tcpfd;
l->tftpfd = tftpfd;
l->next = l6;
return l;
@@ -295,7 +358,6 @@ struct listener *create_wildcard_listeners(int port)
struct listener *create_bound_listeners(struct daemon *daemon)
{
struct listener *listeners = NULL;
struct irec *iface;
int opt = 1;
@@ -306,6 +368,8 @@ struct listener *create_bound_listeners(struct daemon *daemon)
new->family = iface->addr.sa.sa_family;
new->iface = iface;
new->next = listeners;
new->tftpfd = -1;
if ((new->tcpfd = socket(iface->addr.sa.sa_family, SOCK_STREAM, 0)) == -1 ||
(new->fd = socket(iface->addr.sa.sa_family, SOCK_DGRAM, 0)) == -1 ||
setsockopt(new->fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
@@ -347,8 +411,20 @@ struct listener *create_bound_listeners(struct daemon *daemon)
if (listen(new->tcpfd, 5) == -1)
die(_("failed to listen on socket: %s"), NULL);
}
if ((daemon->options & OPT_TFTP) && iface->addr.sa.sa_family == AF_INET && iface->dhcp_ok)
{
short save = iface->addr.in.sin_port;
iface->addr.in.sin_port = htons(TFTP_PORT);
if ((new->tftpfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1 ||
setsockopt(new->tftpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
!fix_fd(new->tftpfd) ||
bind(new->tftpfd, &iface->addr.sa, sa_len(&iface->addr)) == -1)
die(_("failed to create TFTP socket: %s"), NULL);
iface->addr.in.sin_port = save;
}
}
return listeners;
}