diff options
Diffstat (limited to 'sys/netipsec/xform_esp.c')
-rw-r--r-- | sys/netipsec/xform_esp.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/netipsec/xform_esp.c b/sys/netipsec/xform_esp.c index fdcee7f..d9c013b 100644 --- a/sys/netipsec/xform_esp.c +++ b/sys/netipsec/xform_esp.c @@ -555,6 +555,23 @@ esp_input_cb(struct cryptop *crp) */ m->m_flags |= M_DECRYPTED; + /* + * Update replay sequence number, if appropriate. + */ + if (sav->replay) { + u_int32_t seq; + + m_copydata(m, skip + offsetof(struct newesp, esp_seq), + sizeof (seq), (caddr_t) &seq); + if (ipsec_updatereplay(ntohl(seq), sav)) { + DPRINTF(("%s: packet replay check for %s\n", __func__, + ipsec_logsastr(sav))); + espstat.esps_replay++; + error = ENOBUFS; + goto bad; + } + } + /* Determine the ESP header length */ if (sav->flags & SADB_X_EXT_OLD) hlen = sizeof (struct esp) + sav->ivlen; |