1 files changed, 97 insertions, 0 deletions
diff --git a/accel-pptpd/lcp_opt_mru.c b/accel-pptpd/lcp_opt_mru.c
new file mode 100644
index 0000000..153b0e0
--- /dev/null
+++ b/accel-pptpd/lcp_opt_mru.c
@@ -0,0 +1,97 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "log.h"
+
+static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp);
+static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void mru_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr);
+
+struct mru_option_t
+{
+	struct lcp_option_t opt;
+	int mru;
+	int mtu;
+};
+
+static struct lcp_option_handler_t mru_opt_hnd=
+{
+	.init=mru_init,
+	.send_conf_req=mru_send_conf_req,
+	.send_conf_nak=mru_send_conf_nak,
+	.recv_conf_req=mru_recv_conf_req,
+	.free=mru_free,
+	.print=mru_print,
+};
+
+static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp)
+{
+	struct mru_option_t *mru_opt=malloc(sizeof(*mru_opt));
+	memset(mru_opt,0,sizeof(*mru_opt));
+	mru_opt->mtu=0;
+	mru_opt->mru=1500;
+	mru_opt->opt.id=CI_MRU;
+	mru_opt->opt.len=4;
+
+	return &mru_opt->opt;
+}
+
+static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct mru_option_t *mru_opt=container_of(opt,typeof(*mru_opt),opt);
+
+	free(mru_opt);
+}
+
+static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt=container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16=(struct lcp_opt16_t*)ptr;
+	opt16->hdr.id=CI_MRU;
+	opt16->hdr.len=4;
+	opt16->val=htons(mru_opt->mru);
+	return 4;
+}
+
+static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt=container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16=(struct lcp_opt16_t*)ptr;
+	opt16->hdr.id=CI_MRU;
+	opt16->hdr.len=4;
+	opt16->val=htons(mru_opt->mtu);
+	return 4;
+}
+
+static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt=container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16=(struct lcp_opt16_t*)ptr;
+
+	if (!mru_opt->mtu || mru_opt->mtu==ntohs(opt16->val))
+	{
+		mru_opt->mtu=ntohs(opt16->val);
+		return LCP_OPT_ACK;
+	}else return LCP_OPT_NAK;
+}
+
+static void mru_print(void (*print)(const char *fmt,...),struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt=container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16=(struct lcp_opt16_t*)ptr;
+
+	if (ptr) print("<mru %i>",ntohs(opt16->val));
+	else print("<mru %i>",mru_opt->mru);
+}
+
+static void __init mru_opt_init()
+{
+	lcp_option_register(&mru_opt_hnd);
+}
+