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authorOliver Smith <osmith@sysmocom.de>2019-02-26 10:59:13 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2019-06-19 21:50:57 +0200
commitf1b9e0246eed7baf78eca60efe73d7adc8cde751 (patch)
treedb7055ff5e0751b23cc52cec35e6a72045c8fead
parent9ac494f4863e69b0245c452b1f131471c9be8018 (diff)
gsup_router.c: gsup_route_find(): support blobneels/gsup_router
Do not require the blob (addr, addr_len) passed to gsup_route_find() to be nul-terminated. We already have the length, so the nul-termination is redundant. This is needed for the upcoming gsup message forwarding patch [1]: we want to be able to directly pass non-nul-terminated source and destination name blobs to gsup_route_find(). I have looked into fixing all code that calls gsup_route_find() to never pass a nul-terminated blob combination. But this is a can of worms, because it involves both gsup client and server code. Wireshark shows that clients are sending the nul-terminated string in TLV IEs of IPA messages. The server assumes that this is the case in various places. So we would need to fix it in both (server and client), but then we would lose backwards compatibility with old servers and clients. [1]: change-id Ia4f345abc877baaf0a8f73b8988e6514d9589bf5 Related: OS#3793 Change-Id: I01a45900e14d41bcd338f50ad85d9fabf2c61405
-rw-r--r--src/gsup_router.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/gsup_router.c b/src/gsup_router.c
index df978ba..0a9213d 100644
--- a/src/gsup_router.c
+++ b/src/gsup_router.c
@@ -40,8 +40,14 @@ struct osmo_gsup_conn *gsup_route_find(struct osmo_gsup_server *gs,
struct gsup_route *gr;
llist_for_each_entry(gr, &gs->routes, list) {
- if (talloc_total_size(gr->addr) == addrlen &&
- !memcmp(gr->addr, addr, addrlen))
+ size_t gr_addrlen = talloc_total_size(gr->addr); /* gr->addr is a nul-terminated string */
+
+ /* FIXME: despite passing addrlen, a lot of code assumes that addr is also nul-terminated */
+ if (gr_addrlen == addrlen && !memcmp(gr->addr, addr, addrlen))
+ return gr->conn;
+
+ /* Compare addr as non-nul-terminated blob */
+ if (gr_addrlen - 1 == addrlen && !memcmp(gr->addr, addr, addrlen))
return gr->conn;
}
return NULL;