initial checkin of lwip, enough to build

[netwatch.git] / lwip / src / netif / ppp / vjbsdhdr.h

diff --git a/lwip/src/netif/ppp/vjbsdhdr.h b/lwip/src/netif/ppp/vjbsdhdr.h
new file mode 100644 (file)
index 0000000..f462676
--- /dev/null
+++ b/lwip/src/netif/ppp/vjbsdhdr.h
@@ -0,0 +1,75 @@
+#ifndef VJBSDHDR_H
+#define VJBSDHDR_H
+
+#include "lwip/tcp.h"
+
+/*
+ * Structure of an internet header, naked of options.
+ *
+ * We declare ip_len and ip_off to be short, rather than u_short
+ * pragmatically since otherwise unsigned comparisons can result
+ * against negative integers quite easily, and fail in subtle ways.
+ */
+PACK_STRUCT_BEGIN
+struct ip
+{
+#if defined(NO_CHAR_BITFIELDS)
+  u_char   ip_hl_v;  /* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+  unsigned ip_hl:4,              /* header length */
+           ip_v :4;              /* version */
+#elif BYTE_ORDER == BIG_ENDIAN 
+  unsigned ip_v :4,              /* version */
+           ip_hl:4;              /* header length */
+#else
+  COMPLAIN - NO BYTE ORDER SELECTED!
+#endif
+#endif
+  u_char  ip_tos;                /* type of service */
+  u_short ip_len;                /* total length */
+  u_short ip_id;                 /* identification */
+  u_short ip_off;                /* fragment offset field */
+#define  IP_DF 0x4000            /* dont fragment flag */
+#define  IP_MF 0x2000            /* more fragments flag */
+#define  IP_OFFMASK 0x1fff       /* mask for fragmenting bits */
+  u_char  ip_ttl;                /* time to live */
+  u_char  ip_p;                  /* protocol */
+  u_short ip_sum;                /* checksum */
+  struct  in_addr ip_src,ip_dst; /* source and dest address */
+};
+PACK_STRUCT_END
+
+typedef u32_t tcp_seq;
+
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+PACK_STRUCT_BEGIN
+struct tcphdr  
+{
+  u_short  th_sport;    /* source port */
+  u_short  th_dport;    /* destination port */
+  tcp_seq  th_seq;      /* sequence number */
+  tcp_seq  th_ack;      /* acknowledgement number */
+#if defined(NO_CHAR_BITFIELDS)
+  u_char   th_x2_off;
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+  unsigned th_x2 :4,    /* (unused) */
+           th_off:4;    /* data offset */
+#endif
+#if BYTE_ORDER == BIG_ENDIAN 
+  unsigned th_off:4,    /* data offset */
+           th_x2 :4;    /* (unused) */
+#endif
+#endif
+  u_char   th_flags;
+  u_short  th_win;      /* window */
+  u_short  th_sum;      /* checksum */
+  u_short  th_urp;      /* urgent pointer */
+};
+PACK_STRUCT_END
+
+#endif /* VJBSDHDR_H */