static int vstrsize;
static char *vlog;
static int i;
+ static int proto1, proto2;
crBegin;
sfree(vlog);
/*
- * Server version "1.99" means we can choose whether we use v1
- * or v2 protocol. Choice is based on cfg.sshprot.
+ * Decide which SSH protocol version to support.
*/
- if (ssh_versioncmp(version, cfg.sshprot == 1 ? "2.0" : "1.99") >= 0) {
+
+ /* Anything strictly below "2.0" means protocol 1 is supported. */
+ proto1 = ssh_versioncmp(version, "2.0") < 0;
+ /* Anything greater or equal to "1.99" means protocol 2 is supported. */
+ proto2 = ssh_versioncmp(version, "1.99") > 0;
+
+ if (cfg.sshprot == 0 && !proto1) {
+ bombout(("SSH protocol version 1 required by user but not provided by server"));
+ crReturn(0);
+ }
+ if (cfg.sshprot == 3 && !proto2) {
+ bombout(("SSH protocol version 2 required by user but not provided by server"));
+ crReturn(0);
+ }
+
+ if (proto2 && (cfg.sshprot == 2 || !proto1)) {
/*
- * This is a v2 server. Begin v2 protocol.
+ * Use v2 protocol.
*/
char verstring[80], vlog[100];
sprintf(verstring, "SSH-2.0-%s", sshver);
s_rdpkt = ssh2_rdpkt;
} else {
/*
- * This is a v1 server. Begin v1 protocol.
+ * Use v1 protocol.
*/
char verstring[80], vlog[100];
sprintf(verstring, "SSH-%s-%s",
sprintf(vlog, "We claim version: %s", verstring);
logevent(vlog);
strcat(verstring, "\n");
-
- if (cfg.sshprot == 3) {
- bombout(("SSH protocol version 2 required by user but not provided by server"));
- crReturn(0);
- }
logevent("Using SSH protocol version 1");
sk_write(s, verstring, strlen(verstring));