| 75 |
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|
| 76 |
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/* |
| 77 |
|
* Structure of an internet header, naked of options. |
| 78 |
– |
* |
| 79 |
– |
* We declare ip_len and ip_off to be short, rather than u_short |
| 80 |
– |
* pragmatically since otherwise unsigned comparisons can result |
| 81 |
– |
* against negative integers quite easily, and fail in subtle ways. |
| 78 |
|
*/ |
| 79 |
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#ifdef PRAGMA_PACK_SUPPORTED |
| 80 |
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#pragma pack(1) |
| 89 |
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ip_v:4; /* version */ |
| 90 |
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#endif |
| 91 |
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u_int8_t ip_tos; /* type of service */ |
| 92 |
< |
int16_t ip_len; /* total length */ |
| 92 |
> |
u_int16_t ip_len; /* total length */ |
| 93 |
|
u_int16_t ip_id; /* identification */ |
| 94 |
< |
int16_t ip_off; /* fragment offset field */ |
| 94 |
> |
u_int16_t ip_off; /* fragment offset field */ |
| 95 |
|
#define IP_DF 0x4000 /* don't fragment flag */ |
| 96 |
|
#define IP_MF 0x2000 /* more fragments flag */ |
| 97 |
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ |
| 228 |
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caddr32_t ih_next, ih_prev; /* for protocol sequence q's */ |
| 229 |
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u_int8_t ih_x1; /* (unused) */ |
| 230 |
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u_int8_t ih_pr; /* protocol */ |
| 231 |
< |
int16_t ih_len; /* protocol length */ |
| 231 |
> |
u_int16_t ih_len; /* protocol length */ |
| 232 |
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struct in_addr ih_src; /* source internet address */ |
| 233 |
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struct in_addr ih_dst; /* destination internet address */ |
| 234 |
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} PACKED__; |
| 273 |
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u_int8_t ipf_mff; /* XXX overlays ip_tos: use low bit |
| 274 |
|
* to avoid destroying tos (PPPDTRuu); |
| 275 |
|
* copied from (ip_off&IP_MF) */ |
| 276 |
< |
int16_t ip_len; |
| 276 |
> |
u_int16_t ip_len; |
| 277 |
|
u_int16_t ip_id; |
| 278 |
< |
int16_t ip_off; |
| 278 |
> |
u_int16_t ip_off; |
| 279 |
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u_int8_t ip_ttl; |
| 280 |
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u_int8_t ip_p; |
| 281 |
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u_int16_t ip_sum; |
