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Phonet: emit errors when a packet cannot be delivered locally

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When there is no listener socket for a received packet, send an error
back to the sender.

Signed-off-by: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Remi Denis-Courmont 2008-09-22 20:09:13 -07:00 • committed by David S. Miller
parent 87ab4e20b4
commit be0c52bfed
3 changed files with 129 additions and 4 deletions
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32
include/linux/phonet.h
View file

@ -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;