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-rw-r--r--sysdep/linux/sysio.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdep/linux/sysio.h b/sysdep/linux/sysio.h
index 6e54110..2fa5f0a 100644
--- a/sysdep/linux/sysio.h
+++ b/sysdep/linux/sysio.h
@@ -160,3 +160,38 @@ struct tcp_md5sig {
};
#endif
+
+static int
+sk_set_md5_auth_int(sock *s, sockaddr *sa, char *passwd)
+{
+ struct tcp_md5sig md5;
+
+ memset(&md5, 0, sizeof(md5));
+ memcpy(&md5.tcpm_addr, (struct sockaddr *) sa, sizeof(*sa));
+
+ if (passwd)
+ {
+ int len = strlen(passwd);
+
+ if (len > TCP_MD5SIG_MAXKEYLEN)
+ {
+ log(L_ERR "MD5 password too long");
+ return -1;
+ }
+
+ md5.tcpm_keylen = len;
+ memcpy(&md5.tcpm_key, passwd, len);
+ }
+
+ int rv = setsockopt(s->fd, IPPROTO_TCP, TCP_MD5SIG, &md5, sizeof(md5));
+
+ if (rv < 0)
+ {
+ if (errno == ENOPROTOOPT)
+ log(L_ERR "Kernel does not support TCP MD5 signatures");
+ else
+ log(L_ERR "sk_set_md5_auth_int: setsockopt: %m");
+ }
+
+ return rv;
+}