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pbuf Struct Reference
Main packet buffer struct. More...
#include <pbuf.h>
Data Fields | |
| struct pbuf * | next |
| next pbuf in singly linked pbuf chain | |
| void * | payload |
| pointer to the actual data in the buffer | |
| u16_t | tot_len |
| total length of this buffer and all next buffers in chain belonging to the same packet. | |
| u16_t | len |
| length of this buffer | |
| u8_t | type |
| pbuf_type as u8_t instead of enum to save space | |
| u8_t | flags |
| misc flags | |
| u16_t | ref |
| the reference count always equals the number of pointers that refer to this pbuf. | |
Detailed Description
Main packet buffer struct.
Definition at line 118 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
Field Documentation
| u8_t flags |
misc flags
Definition at line 141 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
| u16_t len |
length of this buffer
Definition at line 135 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
next pbuf in singly linked pbuf chain
Definition at line 120 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
| void * payload |
pointer to the actual data in the buffer
Definition at line 123 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
| u16_t ref |
the reference count always equals the number of pointers that refer to this pbuf.
This can be pointers from an application, the stack itself, or pbuf->next pointers from a chain.
Definition at line 148 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
| u16_t tot_len |
total length of this buffer and all next buffers in chain belonging to the same packet.
For non-queue packet chains this is the invariant: p->tot_len == p->len + (p->next? p->next->tot_len: 0)
Definition at line 132 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
| u8_t type |
pbuf_type as u8_t instead of enum to save space
Definition at line 138 of file FEATURE_LWIP/lwip-interface/lwip/src/include/lwip/pbuf.h.
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