handshake: Add setter for vendor IEs

Some connections, like Hotspot require additional IEs to be used during
the Association.  These are now passed as 'extra_ies' when invoking
netdev_connect, however they are also needed during ReAssociation and FT
to such APs.

Additionally, it may be that Hotspot-enabled APs will start utilizing
FILS or SAE.  In these cases the extra_ies need to be accounted for
somehow, either by making a copy in handshake_state, netdev, or the
auth_proto itself.  Similarly, P2P which heavily uses vendor IEs can be
used over SAE in the future.

Since a copy of these IEs is needed, might as well store them in
handshake_state itself for easy book-keeping by network/station.

src/handshake.c

@@ -297,6 +297,33 @@ void handshake_state_set_fte(struct handshake_state *s, const uint8_t *fte)
 	replace_ie(&s->fte, fte);
 }
 
+void handshake_state_set_vendor_ies(struct handshake_state *s,
+					const struct iovec *iov,
+					size_t n_iovs)
+{
+	size_t i;
+	size_t len;
+
+	l_free(s->vendor_ies);
+	s->vendor_ies = NULL;
+
+	if (n_iovs == 0) {
+		s->vendor_ies_len = 0;
+		return;
+	}
+
+	for (i = 0, len = 0; i < n_iovs; i++)
+		len += iov[i].iov_len;
+
+	s->vendor_ies_len = len;
+	s->vendor_ies = l_malloc(len);
+
+	for (i = 0, len = 0; i < n_iovs; i++) {
+		memcpy(s->vendor_ies + len, iov[i].iov_base, iov[i].iov_len);
+		len += iov[i].iov_len;
+	}
+}
+
 void handshake_state_set_kh_ids(struct handshake_state *s,
 				const uint8_t *r0khid, size_t r0khid_len,
 				const uint8_t *r1khid)

src/handshake.h

@@ -92,6 +92,8 @@ struct handshake_state {
 	uint8_t *supplicant_rsnxe;
 	uint8_t *mde;
 	uint8_t *fte;
+	uint8_t *vendor_ies;
+	size_t vendor_ies_len;
 	enum ie_rsn_cipher_suite pairwise_cipher;
 	enum ie_rsn_cipher_suite group_cipher;
 	enum ie_rsn_cipher_suite group_management_cipher;
@@ -178,6 +180,9 @@ void handshake_state_set_ssid(struct handshake_state *s,
 void handshake_state_set_mde(struct handshake_state *s,
 					const uint8_t *mde);
 void handshake_state_set_fte(struct handshake_state *s, const uint8_t *fte);
+void handshake_state_set_vendor_ies(struct handshake_state *s,
+					const struct iovec *iov,
+					size_t n_iovs);
 
 void handshake_state_set_kh_ids(struct handshake_state *s,
 				const uint8_t *r0khid, size_t r0khid_len,