Phonet: emit errors when a packet cannot be delivered locally

[cascardo/linux.git] / include / linux / phonet.h

diff --git a/include/linux/phonet.h b/include/linux/phonet.h
index 001c0e6..3a027f5 100644 (file)
--- a/include/linux/phonet.h
+++ b/include/linux/phonet.h
@@ -45,6 +45,38 @@ struct phonethdr {
        __u8    pn_sobj;
 } __attribute__((packed));
 
+/* Common Phonet payload header */
+struct phonetmsg {
+       __u8    pn_trans_id;    /* transaction ID */
+       __u8    pn_msg_id;      /* message type */
+       union {
+               struct {
+                       __u8    pn_submsg_id;   /* message subtype */
+                       __u8    pn_data[5];
+               } base;
+               struct {
+                       __u16   pn_e_res_id;    /* extended resource ID */
+                       __u8    pn_e_submsg_id; /* message subtype */
+                       __u8    pn_e_data[3];
+               } ext;
+       } pn_msg_u;
+};
+#define PN_COMMON_MESSAGE      0xF0
+#define PN_PREFIX              0xE0 /* resource for extended messages */
+#define pn_submsg_id           pn_msg_u.base.pn_submsg_id
+#define pn_e_submsg_id         pn_msg_u.ext.pn_e_submsg_id
+#define pn_e_res_id            pn_msg_u.ext.pn_e_res_id
+#define pn_data                        pn_msg_u.base.pn_data
+#define pn_e_data              pn_msg_u.ext.pn_e_data
+
+/* data for unreachable errors */
+#define PN_COMM_SERVICE_NOT_IDENTIFIED_RESP    0x01
+#define PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP  0x14
+#define pn_orig_msg_id         pn_data[0]
+#define pn_status              pn_data[1]
+#define pn_e_orig_msg_id       pn_e_data[0]
+#define pn_e_status            pn_e_data[1]
+
 /* Phonet socket address structure */
 struct sockaddr_pn {
        sa_family_t spn_family;