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authorLennart Poettering <lennart@poettering.net>2015-01-13 13:51:51 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-13 13:55:15 +0100
commit6d0b55c272ea31d025e8b3c311cea8cda0bfefd7 (patch)
tree55f2ec0104f2d0a49efdc282c597e1429f4e0345 /src/libsystemd/sd-rtnl
parent5a8bcb674f71a20e95df55319b34c556638378ce (diff)
nspawn: add new option "--port=" for exposing container ports on the local host
This exposes an IP port on the container as local port using DNAT.
Diffstat (limited to 'src/libsystemd/sd-rtnl')
-rw-r--r--src/libsystemd/sd-rtnl/sd-rtnl.c51
1 files changed, 39 insertions, 12 deletions
diff --git a/src/libsystemd/sd-rtnl/sd-rtnl.c b/src/libsystemd/sd-rtnl/sd-rtnl.c
index 7d388c9758..a45ca5e9f5 100644
--- a/src/libsystemd/sd-rtnl/sd-rtnl.c
+++ b/src/libsystemd/sd-rtnl/sd-rtnl.c
@@ -94,52 +94,79 @@ static int rtnl_compute_groups_ap(uint32_t *_groups, unsigned n_groups, va_list
return 0;
}
-int sd_rtnl_open(sd_rtnl **ret, unsigned n_groups, ...) {
+static int rtnl_open_fd_ap(sd_rtnl **ret, int fd, unsigned n_groups, va_list ap) {
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
- va_list ap;
socklen_t addrlen;
int r, one = 1;
assert_return(ret, -EINVAL);
+ assert_return(fd >= 0, -EINVAL);
r = sd_rtnl_new(&rtnl);
if (r < 0)
return r;
- rtnl->fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_ROUTE);
- if (rtnl->fd < 0)
- return -errno;
-
- r = setsockopt(rtnl->fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
if (r < 0)
return -errno;
- r = setsockopt(rtnl->fd, SOL_NETLINK, NETLINK_PKTINFO, &one, sizeof(one));
+ r = setsockopt(fd, SOL_NETLINK, NETLINK_PKTINFO, &one, sizeof(one));
if (r < 0)
return -errno;
- va_start(ap, n_groups);
r = rtnl_compute_groups_ap(&rtnl->sockaddr.nl.nl_groups, n_groups, ap);
- va_end(ap);
if (r < 0)
return r;
addrlen = sizeof(rtnl->sockaddr);
- r = bind(rtnl->fd, &rtnl->sockaddr.sa, addrlen);
+ r = bind(fd, &rtnl->sockaddr.sa, addrlen);
if (r < 0)
return -errno;
- r = getsockname(rtnl->fd, &rtnl->sockaddr.sa, &addrlen);
+ r = getsockname(fd, &rtnl->sockaddr.sa, &addrlen);
if (r < 0)
return r;
+ rtnl->fd = fd;
+
*ret = rtnl;
rtnl = NULL;
return 0;
}
+int sd_rtnl_open_fd(sd_rtnl **ret, int fd, unsigned n_groups, ...) {
+ va_list ap;
+ int r;
+
+ va_start(ap, n_groups);
+ r = rtnl_open_fd_ap(ret, fd, n_groups, ap);
+ va_end(ap);
+
+ return r;
+}
+
+int sd_rtnl_open(sd_rtnl **ret, unsigned n_groups, ...) {
+ va_list ap;
+ int fd, r;
+
+ fd = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_ROUTE);
+ if (fd < 0)
+ return -errno;
+
+ va_start(ap, n_groups);
+ r = rtnl_open_fd_ap(ret, fd, n_groups, ap);
+ va_end(ap);
+
+ if (r < 0) {
+ safe_close(fd);
+ return r;
+ }
+
+ return 0;
+}
+
int sd_rtnl_inc_rcvbuf(const sd_rtnl *const rtnl, const int size) {
return fd_inc_rcvbuf(rtnl->fd, size);
}