diff --git a/libc/kernel/uapi/linux/sctp.h b/libc/kernel/uapi/linux/sctp.h
index 9a808ef..e3fc7bf 100644
--- a/libc/kernel/uapi/linux/sctp.h
+++ b/libc/kernel/uapi/linux/sctp.h
@@ -63,6 +63,7 @@
 #define SCTP_DEFAULT_SNDINFO 34
 #define SCTP_AUTH_DEACTIVATE_KEY 35
 #define SCTP_REUSE_PORT 36
+#define SCTP_PEER_ADDR_THLDS_V2 37
 #define SCTP_SOCKOPT_BINDX_ADD 100
 #define SCTP_SOCKOPT_BINDX_REM 101
 #define SCTP_SOCKOPT_PEELOFF 102
@@ -90,6 +91,8 @@
 #define SCTP_ASCONF_SUPPORTED 128
 #define SCTP_AUTH_SUPPORTED 129
 #define SCTP_ECN_SUPPORTED 130
+#define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131
+#define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE
 #define SCTP_PR_SCTP_NONE 0x0000
 #define SCTP_PR_SCTP_TTL 0x0010
 #define SCTP_PR_SCTP_RTX 0x0020
@@ -230,6 +233,8 @@
   SCTP_ADDR_ADDED,
   SCTP_ADDR_MADE_PRIM,
   SCTP_ADDR_CONFIRMED,
+  SCTP_ADDR_POTENTIALLY_FAILED,
+#define SCTP_ADDR_PF SCTP_ADDR_POTENTIALLY_FAILED
 };
 struct sctp_remote_error {
   __u16 sre_type;
@@ -248,6 +253,15 @@
   sctp_assoc_t ssf_assoc_id;
   __u8 ssf_data[0];
 };
+struct sctp_send_failed_event {
+  __u16 ssf_type;
+  __u16 ssf_flags;
+  __u32 ssf_length;
+  __u32 ssf_error;
+  struct sctp_sndinfo ssfe_info;
+  sctp_assoc_t ssf_assoc_id;
+  __u8 ssf_data[0];
+};
 enum sctp_ssf_flags {
   SCTP_DATA_UNSENT,
   SCTP_DATA_SENT,
@@ -345,6 +359,7 @@
   __u8 sctp_stream_reset_event;
   __u8 sctp_assoc_reset_event;
   __u8 sctp_stream_change_event;
+  __u8 sctp_send_failure_event_event;
 };
 union sctp_notification {
   struct {
@@ -364,6 +379,7 @@
   struct sctp_stream_reset_event sn_strreset_event;
   struct sctp_assoc_reset_event sn_assocreset_event;
   struct sctp_stream_change_event sn_strchange_event;
+  struct sctp_send_failed_event sn_send_failed_event;
 };
 enum sctp_sn_type {
   SCTP_SN_TYPE_BASE = (1 << 15),
@@ -393,7 +409,9 @@
 #define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT
   SCTP_STREAM_CHANGE_EVENT,
 #define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT
-  SCTP_SN_TYPE_MAX = SCTP_STREAM_CHANGE_EVENT,
+  SCTP_SEND_FAILED_EVENT,
+#define SCTP_SEND_FAILED_EVENT SCTP_SEND_FAILED_EVENT
+  SCTP_SN_TYPE_MAX = SCTP_SEND_FAILED_EVENT,
 #define SCTP_SN_TYPE_MAX SCTP_SN_TYPE_MAX
 };
 typedef enum sctp_sn_error {
@@ -505,6 +523,7 @@
 enum sctp_spinfo_state {
   SCTP_INACTIVE,
   SCTP_PF,
+#define SCTP_POTENTIALLY_FAILED SCTP_PF
   SCTP_ACTIVE,
   SCTP_UNCONFIRMED,
   SCTP_UNKNOWN = 0xffff
@@ -586,6 +605,13 @@
   __u16 spt_pathmaxrxt;
   __u16 spt_pathpfthld;
 };
+struct sctp_paddrthlds_v2 {
+  sctp_assoc_t spt_assoc_id;
+  struct sockaddr_storage spt_address;
+  __u16 spt_pathmaxrxt;
+  __u16 spt_pathpfthld;
+  __u16 spt_pathcpthld;
+};
 struct sctp_prstatus {
   sctp_assoc_t sprstat_assoc_id;
   __u16 sprstat_sid;