git: 83a103ec429a - main - libc sctp: improve conformance of sctp_getpaddrs()

[Michael Tuexen]

The branch main has been updated by tuexen:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=83a103ec429a6dd862a73857ebeeff863a41a34d

commit 83a103ec429a6dd862a73857ebeeff863a41a34d
Author:     Michael Tuexen <tue...@freebsd.org>
AuthorDate: 2021-12-01 18:47:50 +0000
Commit:     Michael Tuexen <tue...@freebsd.org>
CommitDate: 2021-12-01 18:50:26 +0000

    libc sctp: improve conformance of sctp_getpaddrs()
    
    When there is no association, don't return -1 and indicate ENOENT,
    but return 0 instead. This is specified in RFC 6458.
    
    PR:             260117
    MFC after:      1 week
---
 lib/libc/net/sctp_sys_calls.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/libc/net/sctp_sys_calls.c b/lib/libc/net/sctp_sys_calls.c
index 615b14ede5aa..7c3652ff5d3c 100644
--- a/lib/libc/net/sctp_sys_calls.c
+++ b/lib/libc/net/sctp_sys_calls.c
@@ -405,7 +405,11 @@ sctp_getpaddrs(int sd, sctp_assoc_t id, struct sockaddr 
**raddrs)
        opt_len = (socklen_t)sizeof(uint32_t);
        if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE,
            &size_of_addresses, &opt_len) != 0) {
-               return (-1);
+               if (errno == ENOENT) {
+                       return (0);
+               } else {
+                       return (-1);
+               }
        }
        opt_len = (socklen_t)((size_t)size_of_addresses + sizeof(struct 
sctp_getaddresses));
        addrs = calloc(1, (size_t)opt_len);