+static const struct keyval kexnames[] = {
+ { "dh-gex-sha1", KEX_DHGEX },
+ { "dh-group14-sha1", KEX_DHGROUP14 },
+ { "dh-group1-sha1", KEX_DHGROUP1 },
+ { "rsa", KEX_RSA },
+ { "WARN", KEX_WARN }
+};
+
+/*
+ * All the terminal modes that we know about for the "TerminalModes"
+ * setting. (Also used by config.c for the drop-down list.)
+ * This is currently precisely the same as the set in ssh.c, but could
+ * in principle differ if other backends started to support tty modes
+ * (e.g., the pty backend).
+ */
+const char *const ttymodes[] = {
+ "INTR", "QUIT", "ERASE", "KILL", "EOF",
+ "EOL", "EOL2", "START", "STOP", "SUSP",
+ "DSUSP", "REPRINT", "WERASE", "LNEXT", "FLUSH",
+ "SWTCH", "STATUS", "DISCARD", "IGNPAR", "PARMRK",
+ "INPCK", "ISTRIP", "INLCR", "IGNCR", "ICRNL",
+ "IUCLC", "IXON", "IXANY", "IXOFF", "IMAXBEL",
+ "ISIG", "ICANON", "XCASE", "ECHO", "ECHOE",
+ "ECHOK", "ECHONL", "NOFLSH", "TOSTOP", "IEXTEN",
+ "ECHOCTL", "ECHOKE", "PENDIN", "OPOST", "OLCUC",
+ "ONLCR", "OCRNL", "ONOCR", "ONLRET", "CS7",
+ "CS8", "PARENB", "PARODD", NULL
+};
+
+/*
+ * Convenience functions to access the backends[] array
+ * (which is only present in tools that manage settings).
+ */
+
+Backend *backend_from_name(const char *name)
+{
+ Backend **p;
+ for (p = backends; *p != NULL; p++)
+ if (!strcmp((*p)->name, name))
+ return *p;
+ return NULL;
+}
+
+Backend *backend_from_proto(int proto)
+{
+ Backend **p;
+ for (p = backends; *p != NULL; p++)
+ if ((*p)->protocol == proto)
+ return *p;
+ return NULL;
+}
+
+int get_remote_username(Config *cfg, char *user, size_t len)
+{
+ if (*cfg->username) {
+ strncpy(user, cfg->username, len);
+ user[len-1] = '\0';
+ } else {
+ if (cfg->username_from_env) {
+ /* Use local username. */
+ char *luser = get_username();
+ strncpy(user, luser, len);
+ user[len-1] = '\0';
+ sfree(luser);
+ } else {
+ *user = '\0';
+ }
+ }
+ return (*user != '\0');
+}
+