test: udp-preload: Provide setsockopt

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/test/udp-preload.c b/test/udp-preload.c
index ec3be09540ad654b0541419f627dfdaab0ae72da..86240a48d3cca396bb0113962e33922c2cd006a0 100644 (file)
--- a/test/udp-preload.c
+++ b/test/udp-preload.c
@@ -59,9 +59,12 @@ static anyfn_type *find_any(const char *name) {
 
 #define socket_args int domain, int type, int protocol
 #define bind_args   int fd, const struct sockaddr *addr, socklen_t addrlen
-#define WRAPS(X)                               \
-    X(socket, (domain,type,protocol))          \
-    X(bind,   (fd,addr,addrlen))
+#define setsockopt_args  int fd, int level, int optname, \
+                         const void *optval, socklen_t optlen
+#define WRAPS(X)                                       \
+    X(socket,     (domain,type,protocol))              \
+    X(bind,       (fd,addr,addrlen))                   \
+    X(setsockopt, (fd,level,optname,optval,optlen))
 
 #define DEF_OLD(fn,args)                               \
   typedef int fn##_fn_type(fn##_args);                 \
@@ -160,4 +163,13 @@ WRAP(bind) {
     return old_bind(fd,(const void*)&sun,sizeof(sun));
 }
 
-//udp (test/tmp/outside.conf:19): setsockopt(,IPV6_V6ONLY,&1,): Operation not supported
+WRAP(setsockopt) {
+    fdinfo *ent=lookup(fd);
+    if (!ent) return old_setsockopt(fd,level,optname,optval,optlen);
+    if (ent->af==AF_INET6 && level==IPPROTO_IPV6 && optname==IPV6_V6ONLY
+       && optlen==sizeof(int) && *(int*)optval==1) {
+       return 0;
+    }
+    errno=ENOTTY;
+    return -1;
+}