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diff --git a/plugins/linux.h b/plugins/linux.h
new file mode 100644
index 0000000..3b39d32
--- /dev/null
+++ b/plugins/linux.h
@@ -0,0 +1,135 @@
+/*
+ * Special compatibility definitions for linux.
+ *
+ *      On the linux platform, several IP-related structures have
+ *      different names. Also some of the structure fields have
+ *      other names, although the layout is (obviously) fixed.
+ *      Several constants are not defined in the standard files.
+ *
+ *      @(#)linux.h             e07@nikhef.nl (Eric Wassenaar) 960301
+ * 
+ * XXX [src] - This is a complete ripoff from the fping program
+ */
+
+#if defined(linux)
+
+#include <endian.h>                             /* to get the proper BYTE_ORDER */
+
+#if !defined(BYTE_ORDER) || (BYTE_ORDER != BIG_ENDIAN && \
+     BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != PDP_ENDIAN)
+error "Undefined or invalid BYTE_ORDER";
+#endif
+
+/*
+ * Structure of an ip header, without options.
+ */
+
+#define IPVERSION       4
+
+struct ip {
+#if (BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN)
+        u_char ip_hl:4,                         /* header length */
+          ip_v:4;                                       /* version */
+#else
+        u_char ip_v:4,                          /* version */
+          ip_hl:4;                                      /* header length */
+#endif
+        u_char ip_tos;                          /* type of service */
+        short ip_len;                           /* total length */
+        u_short ip_id;                          /* identification */
+        short ip_off;                           /* fragment offset field */
+#define IP_DF 0x4000                    /* dont fragment flag */
+#define IP_MF 0x2000                    /* more fragments flag */
+        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 */
+};
+
+#define IP_MAXPACKET    65535   /* maximum packet size */
+
+/*
+ * Structure of an icmp header.
+ */
+
+struct icmp {
+        u_char icmp_type;                       /* type of message, see below */
+        u_char icmp_code;                       /* type sub code */
+        u_short icmp_cksum;                     /* ones complement cksum of struct */
+        union {
+                u_char ih_pptr;                 /* ICMP_PARAMPROB */
+                struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
+                struct ih_idseq {
+                        n_short icd_id;
+                        n_short icd_seq;
+                } ih_idseq;
+                int ih_void;
+        } icmp_hun;
+#define icmp_pptr       icmp_hun.ih_pptr
+#define icmp_gwaddr     icmp_hun.ih_gwaddr
+#define icmp_id         icmp_hun.ih_idseq.icd_id
+#define icmp_seq        icmp_hun.ih_idseq.icd_seq
+#define icmp_void       icmp_hun.ih_void
+        union {
+                struct id_ts {
+                        n_time its_otime;
+                        n_time its_rtime;
+                        n_time its_ttime;
+                } id_ts;
+                struct id_ip {
+                        struct ip idi_ip;
+                        /* options and then 64 bits of data */
+                } id_ip;
+                u_long id_mask;
+                char id_data[1];
+        } icmp_dun;
+#define icmp_otime      icmp_dun.id_ts.its_otime
+#define icmp_rtime      icmp_dun.id_ts.its_rtime
+#define icmp_ttime      icmp_dun.id_ts.its_ttime
+#define icmp_ip         icmp_dun.id_ip.idi_ip
+#define icmp_mask       icmp_dun.id_mask
+#define icmp_data       icmp_dun.id_data
+};
+
+#define ICMP_MINLEN     8                       /* abs minimum */
+
+/*
+ * Definition of icmp type and code field values.
+ */
+
+#define ICMP_ECHOREPLY          0       /* echo reply */
+#define ICMP_UNREACH            3       /* dest unreachable, codes: */
+#define         ICMP_UNREACH_NET                0       /* bad net */
+#define         ICMP_UNREACH_HOST               1       /* bad host */
+#define         ICMP_UNREACH_PROTOCOL   2       /* bad protocol */
+#define         ICMP_UNREACH_PORT               3       /* bad port */
+#define         ICMP_UNREACH_NEEDFRAG   4       /* IP_DF caused drop */
+#define         ICMP_UNREACH_SRCFAIL    5       /* src route failed */
+#define ICMP_SOURCEQUENCH       4       /* packet lost, slow down */
+#define ICMP_REDIRECT           5       /* shorter route, codes: */
+#define         ICMP_REDIRECT_NET               0       /* for network */
+#define         ICMP_REDIRECT_HOST              1       /* for host */
+#define         ICMP_REDIRECT_TOSNET    2       /* for tos and net */
+#define         ICMP_REDIRECT_TOSHOST   3       /* for tos and host */
+#define ICMP_ECHO                       8       /* echo service */
+#define ICMP_TIMXCEED           11      /* time exceeded, codes: */
+#define         ICMP_TIMXCEED_INTRANS   0       /* ttl==0 in transit */
+#define         ICMP_TIMXCEED_REASS             1       /* ttl==0 in reass */
+#define ICMP_PARAMPROB          12              /* ip header bad */
+#define ICMP_TSTAMP                     13              /* timestamp request */
+#define ICMP_TSTAMPREPLY        14              /* timestamp reply */
+#define ICMP_IREQ                       15              /* information request */
+#define ICMP_IREQREPLY          16              /* information reply */
+#define ICMP_MASKREQ            17              /* address mask request */
+#define ICMP_MASKREPLY          18              /* address mask reply */
+
+/*
+ * Definitions needed for the udp header structure.
+ */
+
+#define uh_sport        source
+#define uh_dport        dest
+#define uh_ulen         len
+#define uh_sum          check
+
+#endif /* linux */