| … | |
… | |
| 40 | #include "util.h" |
40 | #include "util.h" |
| 41 | |
41 | |
| 42 | struct net_packet |
42 | struct net_packet |
| 43 | { |
43 | { |
| 44 | u32 len; // actually u16, but padding... |
44 | u32 len; // actually u16, but padding... |
|
|
45 | // upto 4 bytes at the end might get overwritten when decrypting, |
|
|
46 | // which means len, above, is regularly overwritten with part |
|
|
47 | // of the random prefix when RAND_BYTES=12. |
| 45 | |
48 | |
| 46 | u8 &operator[] (u16 offset) const; |
49 | u8 &operator[] (u16 offset) const; |
| 47 | u8 *at (u16 offset) const; |
50 | u8 *at (u16 offset) const; |
| 48 | |
51 | |
| 49 | void unshift_hdr (u16 hdrsize) |
52 | void unshift_hdr (u16 hdrsize) |
| … | |
… | |
| 56 | { |
59 | { |
| 57 | len -= hdrsize; |
60 | len -= hdrsize; |
| 58 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
61 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
| 59 | } |
62 | } |
| 60 | |
63 | |
| 61 | void skip_ipv4_hdr (u16 extra = 0) |
64 | u16 ipv4_hdr_len () const |
| 62 | { |
65 | { |
| 63 | skip_hdr ((((*this)[0] & 15) << 2) + extra); |
66 | return ((*this)[0] & 15) << 2; |
| 64 | } |
67 | } |
| 65 | |
68 | |
| 66 | void set (const net_packet &pkt) |
69 | void set (const net_packet &pkt) |
| 67 | { |
70 | { |
| 68 | len = pkt.len; |
71 | len = pkt.len; |
