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pimd: handle endianness in pim header structure

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structures with bit fields in pim_msg.h should consider endianness

Signed-off-by: Binu <binu_abraham@looptelecom.com>
This commit is contained in:
Binu Abraham 2019-07-10 11:46:40 +08:00
parent f85d5e3d97
commit be6a32454b
1 changed files with 18 additions and 1 deletions
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19
pimd/pim_msg.h
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@ -42,7 +42,7 @@ enum pim_msg_address_family {
}; };
/* /*
* Network Order pim_msg_hdr * pim_msg_hdr
* ========================= * =========================
* PIM Header definition as per RFC 5059. N bit introduced to indicate * PIM Header definition as per RFC 5059. N bit introduced to indicate
* do-not-forward option in PIM Boot strap Message. * do-not-forward option in PIM Boot strap Message.
@ -53,10 +53,19 @@ enum pim_msg_address_family {
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/ */
struct pim_msg_header { struct pim_msg_header {
#if (BYTE_ORDER == LITTLE_ENDIAN)
uint8_t type : 4; uint8_t type : 4;
uint8_t ver : 4; uint8_t ver : 4;
uint8_t reserved : 7;
uint8_t Nbit : 1; /* No Fwd Bit */
#elif (BYTE_ORDER == BIG_ENDIAN)
uint8_t ver : 4;
uint8_t type : 4;
uint8_t Nbit : 1; /* No Fwd Bit */ uint8_t Nbit : 1; /* No Fwd Bit */
uint8_t reserved : 7; uint8_t reserved : 7;
#else
#error"Please set byte order"
#endif
uint16_t checksum; uint16_t checksum;
} __attribute__((packed)); } __attribute__((packed));
@ -79,9 +88,17 @@ struct pim_encoded_ipv4_unicast {
struct pim_encoded_group_ipv4 { struct pim_encoded_group_ipv4 {
uint8_t family; uint8_t family;
uint8_t ne; uint8_t ne;
#if (BYTE_ORDER == LITTLE_ENDIAN)
uint8_t sz : 1; /* scope zone bit */
uint8_t reserved : 6; /* Reserved */
uint8_t bidir : 1; /* Bidir bit */
#elif (BYTE_ORDER == BIG_ENDIAN)
uint8_t bidir : 1; /* Bidir bit */ uint8_t bidir : 1; /* Bidir bit */
uint8_t reserved : 6; /* Reserved */ uint8_t reserved : 6; /* Reserved */
uint8_t sz : 1; /* scope zone bit */ uint8_t sz : 1; /* scope zone bit */
#else
#error"Please set byte order"
#endif
uint8_t mask; uint8_t mask;
struct in_addr addr; struct in_addr addr;
} __attribute__((packed)); } __attribute__((packed));