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sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt

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This patch is to implement:

  rfc6951#section-6.1: Get or Set the Remote UDP Encapsulation Port Number

with the param of the struct:

  struct sctp_udpencaps {
    sctp_assoc_t sue_assoc_id;
    struct sockaddr_storage sue_address;
    uint16_t sue_port;
  };

the encap_port of sock, assoc or transport can be changed by users,
which also means it allows the different transports of the same asoc
to have different encap_port value.

v1->v2:
  - no change.
v2->v3:
  - fix the endian warning when setting values between encap_port and
    sue_port.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xin Long
2020-10-29 15:05:02 +08:00
committed by Jakub Kicinski
parent e8a3001c21
commit 8dba29603b
2 changed files with 121 additions and 0 deletions
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7
include/uapi/linux/sctp.h
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@@ -140,6 +140,7 @@ typedef __s32 sctp_assoc_t;
#define SCTP_ECN_SUPPORTED 130
#define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131
#define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE
#define SCTP_REMOTE_UDP_ENCAPS_PORT 132
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000
@@ -1197,6 +1198,12 @@ struct sctp_event {
uint8_t se_on;
};
struct sctp_udpencaps {
sctp_assoc_t sue_assoc_id;
struct sockaddr_storage sue_address;
uint16_t sue_port;
};
/* SCTP Stream schedulers */
enum sctp_sched_type {
SCTP_SS_FCFS,