path: root/slirp/libslirp.h
diff options
authorEd Swierk <eswierk@aristanetworks.com>2009-08-20 19:00:31 -0700
committerAnthony Liguori <aliguori@us.ibm.com>2009-08-27 20:46:58 -0500
commitdf7a86ed735eafefbd046c8cad7134652fe3f600 (patch)
tree585563918d17462f707cebdae337d5fcde45d927 /slirp/libslirp.h
parentce0bd027df9c62766a5417521d0f08f27359d43f (diff)
slirp: Read host DNS config on demand
Currently the qemu user-mode networking stack reads the host DNS configuration (/etc/resolv.conf or the Windows equivalent) only once when qemu starts. This causes name lookups in the guest to fail if the host is moved to a different network from which the original DNS servers are unreachable, a common occurrence when the host is a laptop. This patch changes the slirp code to read the host DNS configuration on demand, caching the results for at most 1 second to avoid unnecessary overhead if name lookups occur in rapid succession. On non-Windows hosts, /etc/resolv.conf is re-read only if the file has been replaced or if its size or mtime has changed. Signed-off-by: Ed Swierk <eswierk@aristanetworks.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'slirp/libslirp.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/slirp/libslirp.h b/slirp/libslirp.h
index 93087ed74a..67c70e32e3 100644
--- a/slirp/libslirp.h
+++ b/slirp/libslirp.h
@@ -8,6 +8,8 @@
struct Slirp;
typedef struct Slirp Slirp;
+int get_dns_addr(struct in_addr *pdns_addr);
Slirp *slirp_init(int restricted, struct in_addr vnetwork,
struct in_addr vnetmask, struct in_addr vhost,
const char *vhostname, const char *tftp_path,