pppoe-discovery: add options to tune discovery timeout and attempts

[ppp.git] / pppd / plugins / rp-pppoe / pppoe.h

diff --git a/pppd/plugins/rp-pppoe/pppoe.h b/pppd/plugins/rp-pppoe/pppoe.h
index 3dba439082d3d2a38011cff34b6961fd5290c867..813dcf368cf3369ff48a94db10b5e5b028716175 100644 (file)
--- a/pppd/plugins/rp-pppoe/pppoe.h
+++ b/pppd/plugins/rp-pppoe/pppoe.h
@@ -47,6 +47,10 @@
 #include <sys/socket.h>
 #endif
 
+/* This has to be included before Linux 4.8's linux/in.h
+ * gets dragged in. */
+#include <netinet/in.h>
+
 /* Ugly header files on some Linux boxes... */
 #if defined(HAVE_LINUX_IF_H)
 #include <linux/if.h>
@@ -84,8 +88,6 @@ typedef unsigned long UINT32_t;
 #include <linux/if_ether.h>
 #endif
 
-#include <netinet/in.h>
-
 #ifdef HAVE_NETINET_IF_ETHER_H
 #include <sys/types.h>
 
@@ -98,7 +100,6 @@ typedef unsigned long UINT32_t;
 #endif
 
 
-
 /* Ethernet frame types according to RFC 2516 */
 #define ETH_PPPOE_DISCOVERY 0x8863
 #define ETH_PPPOE_SESSION   0x8864
@@ -129,6 +130,7 @@ extern UINT16_t Eth_PPPOE_Session;
 #define TAG_AC_COOKIE          0x0104
 #define TAG_VENDOR_SPECIFIC    0x0105
 #define TAG_RELAY_SESSION_ID   0x0110
+#define TAG_PPP_MAX_PAYLOAD    0x0120
 #define TAG_SERVICE_NAME_ERROR 0x0201
 #define TAG_AC_SYSTEM_ERROR    0x0202
 #define TAG_GENERIC_ERROR      0x0203
@@ -167,6 +169,13 @@ extern UINT16_t Eth_PPPOE_Session;
 #define IPV4ALEN     4
 #define SMALLBUF   256
 
+/* There are other fixed-size buffers preventing
+   this from being increased to 16110. The buffer
+   sizes would need to be properly de-coupled from
+   the default MRU. For now, getting up to 1500 is
+   enough. */
+#define ETH_JUMBO_LEN 1508
+
 /* A PPPoE Packet, including Ethernet headers */
 typedef struct PPPoEPacketStruct {
     struct ethhdr ethHdr;      /* Ethernet header */
@@ -174,7 +183,7 @@ typedef struct PPPoEPacketStruct {
     unsigned int code:8;       /* PPPoE code */
     unsigned int session:16;   /* PPPoE session */
     unsigned int length:16;    /* Payload length */
-    unsigned char payload[ETH_DATA_LEN]; /* A bit of room to spare */
+    unsigned char payload[ETH_JUMBO_LEN]; /* A bit of room to spare */
 } PPPoEPacket;
 
 #define PPPOE_VER(vt)          ((vt) >> 4)
@@ -184,15 +193,18 @@ typedef struct PPPoEPacketStruct {
 /* Header size of a PPPoE packet */
 #define PPPOE_OVERHEAD 6  /* type, code, session, length */
 #define HDR_SIZE (sizeof(struct ethhdr) + PPPOE_OVERHEAD)
-#define MAX_PPPOE_PAYLOAD (ETH_DATA_LEN - PPPOE_OVERHEAD)
-#define MAX_PPPOE_MTU (MAX_PPPOE_PAYLOAD - 2)
+#define MAX_PPPOE_PAYLOAD (ETH_JUMBO_LEN - PPPOE_OVERHEAD)
+#define PPP_OVERHEAD 2  /* protocol */
+#define MAX_PPPOE_MTU (MAX_PPPOE_PAYLOAD - PPP_OVERHEAD)
+#define TOTAL_OVERHEAD (PPPOE_OVERHEAD + PPP_OVERHEAD)
+#define ETH_PPPOE_MTU (ETH_DATA_LEN - TOTAL_OVERHEAD)
 
 /* PPPoE Tag */
 
 typedef struct PPPoETagStruct {
     unsigned int type:16;      /* tag type */
     unsigned int length:16;    /* Length of payload */
-    unsigned char payload[ETH_DATA_LEN]; /* A LOT of room to spare */
+    unsigned char payload[ETH_JUMBO_LEN]; /* A LOT of room to spare */
 } PPPoETag;
 /* Header size of a PPPoE tag */
 #define TAG_HDR_SIZE 4
@@ -233,6 +245,10 @@ typedef struct PPPoEConnectionStruct {
     int error;                 /* Error packet received */
     int debug;                 /* Set to log packets sent and received */
     int discoveryTimeout;       /* Timeout for discovery packets */
+    int discoveryAttempts;      /* Number of discovery attempts */
+    int seenMaxPayload;
+    int mtu;                   /* Stored MTU */
+    int mru;                   /* Stored MRU */
 } PPPoEConnection;
 
 /* Structure used to determine acceptable PADO or PADS packet */