OK, this is the fix:
diff --git a/src/modules/tm/t_msgbuilder.c b/src/modules/tm/t_msgbuilder.c
index 362ff6c5eb..187be7871d 100644
--- a/src/modules/tm/t_msgbuilder.c
+++ b/src/modules/tm/t_msgbuilder.c
@@ -1246,7 +1246,8 @@ char *build_dlg_ack(struct sip_msg *rpl, struct cell *Trans,
/* headers */
*len += Trans->from_hdr.len + Trans->callid_hdr.len + to->len
- + Trans->cseq_hdr_n.len + 1 + ACK_LEN + CRLF_LEN;
+ + Trans->cseq_hdr_n.len + 1 + ACK_LEN +
+ + MAXFWD_HEADER_LEN + CRLF_LEN;
/* copy'n'paste Route headers */
@@ -1291,6 +1292,8 @@ char *build_dlg_ack(struct sip_msg *rpl, struct cell *Trans,
append_str(p, Trans->callid_hdr.s, Trans->callid_hdr.len);
append_str(p, to->s, to->len);
+ append_str(p, MAXFWD_HEADER, MAXFWD_HEADER_LEN);
+
append_str(p, Trans->cseq_hdr_n.s, Trans->cseq_hdr_n.len);
append_str(p, " ", 1);
append_str(p, ACK, ACK_LEN);
Can I push it to master and 5.8?
-- Juha