welterde/l2tpns
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Remove all acknoledgement stuff. Still doesn't work.

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Signed-off-by: Benjamin Cama <benoar@dolka.fr>
This commit is contained in:
Benjamin Cama 2011-08-16 16:42:13 +02:00
parent ba87a9d874
commit 5cd5238b2f
1 changed files with 15 additions and 82 deletions
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95
l2tpns.c
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@ -540,7 +540,7 @@ static void initnetlink(void)
}
}
static ssize_t netlink_send(struct nlmsghdr *nh, int want_ack)
static ssize_t netlink_send(struct nlmsghdr *nh)
{
struct sockaddr_nl nladdr;
struct iovec iov;
@ -548,8 +548,6 @@ static ssize_t netlink_send(struct nlmsghdr *nh, int want_ack)
nh->nlmsg_pid = getpid();
nh->nlmsg_seq = ++nlseqnum;
if (want_ack)
nh->nlmsg_flags |= NLM_F_ACK;
// set kernel address
memset(&nladdr, 0, sizeof(nladdr));
@ -577,50 +575,12 @@ static ssize_t netlink_recv(char *buf, ssize_t len)
return recvmsg(nlfd, &msg, 0);
}
static ssize_t netlink_check_ack(struct nlmsghdr *ack_nh, ssize_t len, int msg_count)
{
uint32_t seqnum = 0;
// expect ack
for (; NLMSG_OK (ack_nh, len); ack_nh = NLMSG_NEXT (ack_nh, len))
{
if (ack_nh->nlmsg_type == NLMSG_DONE)
return msg_count != 0 || seqnum != nlseqnum;
// 1 => lost an ack
if (ack_nh->nlmsg_type == NLMSG_ERROR)
{
struct nlmsgerr *errmsg = NLMSG_DATA(ack_nh);
if (errmsg->error)
return errmsg->error; // got an error back
else
{
// ack received
--msg_count;
if (errmsg->msg.nlmsg_seq > seqnum);
seqnum = errmsg->msg.nlmsg_seq;
// if this is a single message, return now
if (!(ack_nh->nlmsg_flags & NLM_F_MULTI))
return msg_count != 0 || seqnum != nlseqnum;
}
}
else
// unknown message
LOG(3, 0, 0, "Got an unknown netlink message: type %d\n", ack_nh->nlmsg_type);
}
return 1; // malformed message?!
}
//
// Set up TUN interface
static void inittun(void)
{
struct ifinfomsg ifinfo;
struct ifreq ifr;
char buf[4096];
ssize_t len;
struct nlmsghdr *resp_nh;
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN;
@ -651,6 +611,9 @@ static void inittun(void)
struct rtattr ifname_rta __attribute__ ((aligned(RTA_ALIGNTO)));
char ifname[IFNAMSIZ];
} req;
char buf[4096];
ssize_t len;
struct nlmsghdr *resp_nh;
req.nh.nlmsg_type = RTM_GETLINK;
req.nh.nlmsg_flags = NLM_F_REQUEST;
@ -664,7 +627,7 @@ static void inittun(void)
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo)
+ req.ifname_rta.rta_len);
if(netlink_send(&req.nh, 0) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0)
if(netlink_send(&req.nh) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0)
{
LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno));
exit(1);
@ -673,7 +636,7 @@ static void inittun(void)
resp_nh = (struct nlmsghdr *)buf;
if (!NLMSG_OK (resp_nh, len))
{
LOG(0, 0, 0, "Malformed answer getting tun ifindex\n");
LOG(0, 0, 0, "Malformed answer getting tun ifindex %d\n", len);
exit(1);
}
@ -682,7 +645,6 @@ static void inittun(void)
tunidx = ifinfo.ifi_index;
}
{
ssize_t err;
struct {
// interface setting
struct nlmsghdr nh;
@ -704,8 +666,6 @@ static void inittun(void)
struct rtattr rta;
struct in6_addr addr6 __attribute__ ((aligned(RTA_ALIGNTO)));;
} ipv6_attr;
char buf[256];
ssize_t buf_len;
char *buf_ptr;
memset(&req, 0, sizeof(req));
@ -736,7 +696,7 @@ static void inittun(void)
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo)
+ u32_attr.rta.rta_len * 2);
if (netlink_send(&req.nh, 1) < 0)
if (netlink_send(&req.nh) < 0)
{
LOG(0, 0, 0, "Error setting up tun device interface: %s\n", strerror(errno));
exit(1);
@ -760,16 +720,16 @@ static void inittun(void)
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
+ ipv4_attr.rta.rta_len);
if (netlink_send(&req.nh, 1) < 0)
if (netlink_send(&req.nh) < 0)
{
LOG(0, 0, 0, "Error setting up tun device IPv4 address: %s\n", strerror(errno));
exit(1);
}
memset(&req, 0, sizeof(req));
// Only setup IPv6 on the tun device if we have a configured prefix
if (config->ipv6_prefix.s6_addr[0]) {
memset(&req, 0, sizeof(req));
req.nh.nlmsg_type = RTM_NEWADDR;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
@ -790,7 +750,7 @@ static void inittun(void)
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
+ ipv6_attr.rta.rta_len);
if (netlink_send(&req.nh, 1) < 0)
if (netlink_send(&req.nh) < 0)
{
LOG(0, 0, 0, "Error setting up tun device IPv6 LL address: %s\n", strerror(errno));
exit(1);
@ -816,50 +776,23 @@ static void inittun(void)
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr)
+ ipv6_attr.rta.rta_len);
if (netlink_send(&req.nh, 1) < 0)
if (netlink_send(&req.nh) < 0)
{
LOG(0, 0, 0, "Error setting up tun device IPv6 global address: %s\n", strerror(errno));
exit(1);
}
}
memset(&req, 0, sizeof(req));
}
req.nh.nlmsg_type = NLMSG_DONE;
req.nh.nlmsg_len = NLMSG_LENGTH(0);
if (netlink_send(&req.nh, 1) < 0)
if (netlink_send(&req.nh) < 0)
{
LOG(0, 0, 0, "Error finishing setting up tun device: %s\n", strerror(errno));
exit(1);
}
buf_ptr = buf;
buf_len = sizeof(buf);
do
{
len = netlink_recv(buf_ptr, sizeof(buf_len));
if (len < 0)
{
LOG(0, 0, 0, "Error waiting for ack setting up tun device: %s\n", strerror(errno));
exit(1);
}
resp_nh = (struct nlmsghdr *)buf_ptr;
buf_len -= len;
buf_ptr += len;
}
while (buf_len > 0 && (resp_nh->nlmsg_flags & NLM_F_MULTI)
&& resp_nh->nlmsg_type != NLMSG_DONE);
if ((err = netlink_check_ack((struct nlmsghdr *)buf, buf_len, 4)))
{
if (err < 0)
LOG(0, 0, 0, "Error while receiving tun device ack: %s\n", strerror(errno));
else
LOG(0, 0, 0, "Error while receiving tun device ack\n");
exit(1);
}
}
}