MeterLogger
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Data Structures | |
struct | pbuf |
Macros | |
#define | LWIP_SUPPORT_CUSTOM_PBUF (IP_FRAG && !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF) |
#define | PBUF_TRANSPORT_HLEN 20 |
#define | PBUF_IP_HLEN 20 |
#define | PBUF_FLAG_PUSH 0x01U |
#define | PBUF_FLAG_IS_CUSTOM 0x02U |
#define | PBUF_FLAG_MCASTLOOP 0x04U |
#define | pbuf_init() |
Enumerations | |
enum | pbuf_layer { PBUF_TRANSPORT, PBUF_IP, PBUF_LINK, PBUF_RAW } |
enum | pbuf_type { PBUF_RAM, PBUF_ROM, PBUF_REF, PBUF_POOL } |
#define LWIP_SUPPORT_CUSTOM_PBUF (IP_FRAG && !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF) |
#define PBUF_FLAG_IS_CUSTOM 0x02U |
indicates this is a custom pbuf: pbuf_free and pbuf_header handle such a a pbuf differently
Definition at line 72 of file pbuf.h.
Referenced by pbuf_alloc(), and pbuf_free().
#define PBUF_FLAG_MCASTLOOP 0x04U |
indicates this pbuf is UDP multicast to be looped back
Definition at line 74 of file pbuf.h.
Referenced by ip_output_if().
#define PBUF_FLAG_PUSH 0x01U |
#define pbuf_init | ( | ) |
Definition at line 126 of file pbuf.h.
Referenced by lwip_init().
#define PBUF_IP_HLEN 20 |
Definition at line 48 of file pbuf.h.
Referenced by pbuf_alloc().
#define PBUF_TRANSPORT_HLEN 20 |
Definition at line 47 of file pbuf.h.
Referenced by pbuf_alloc().
enum pbuf_layer |
struct pbuf* pbuf_alloc | ( | pbuf_layer | layer, |
u16_t | length, | ||
pbuf_type | type | ||
) |
Allocates a pbuf of the given type (possibly a chain for PBUF_POOL type).
The actual memory allocated for the pbuf is determined by the layer at which the pbuf is allocated and the requested size (from the size parameter).
layer | flag to define header size |
length | size of the pbuf's payload |
type | this parameter decides how and where the pbuf should be allocated as follows: |
Definition at line 234 of file pbuf.c.
References EP_OFFSET, pbuf::flags, pbuf::len, LWIP_ASSERT, LWIP_DBG_LEVEL_SERIOUS, LWIP_DBG_LEVEL_WARNING, LWIP_DBG_TRACE, LWIP_DEBUGF, LWIP_MEM_ALIGN, LWIP_MEM_ALIGN_SIZE, LWIP_MIN, MEM_ALIGNMENT, mem_malloc(), memp_malloc(), pbuf::next, NULL, pbuf::payload, PBUF_DEBUG, PBUF_FLAG_IS_CUSTOM, pbuf_free(), PBUF_IP, PBUF_IP_HLEN, PBUF_LINK, PBUF_LINK_HLEN, PBUF_POOL, PBUF_POOL_BUFSIZE_ALIGNED, PBUF_POOL_IS_EMPTY, PBUF_RAM, PBUF_RAW, PBUF_REF, PBUF_ROM, PBUF_TRANSPORT, PBUF_TRANSPORT_HLEN, pbuf::ref, SIZEOF_STRUCT_PBUF, pbuf::tot_len, pbuf::type, and U16_F.
Referenced by espconn_udp_sendto(), espconn_udp_sent(), netif_set_link_down(), pbuf_coalesce(), send_ack(), send_nak(), and send_offer().
Concatenate two pbufs (each may be a pbuf chain) and take over the caller's reference of the tail pbuf.
Definition at line 823 of file pbuf.c.
References pbuf::len, LWIP_ASSERT, LWIP_ERROR, pbuf::next, NULL, and pbuf::tot_len.
Referenced by pbuf_chain().
Chain two pbufs (or pbuf chains) together.
The caller MUST call pbuf_free(t) once it has stopped using it. Use pbuf_cat() instead if you no longer use t.
h | head pbuf (chain) |
t | tail pbuf (chain) |
The ->tot_len fields of all pbufs of the head chain are adjusted. The ->next field of the last pbuf of the head chain is adjusted. The ->ref field of the first pbuf of the tail chain is adjusted.
Definition at line 864 of file pbuf.c.
References LWIP_DBG_TRACE, LWIP_DEBUGF, pbuf_cat(), PBUF_DEBUG, and pbuf_ref().
Count number of pbufs in a chain
p | first pbuf of chain |
Definition at line 782 of file pbuf.c.
References pbuf::next, and NULL.
Referenced by netif_set_link_down().
struct pbuf* pbuf_coalesce | ( | struct pbuf * | p, |
pbuf_layer | layer | ||
) |
Creates a single pbuf out of a queue of pbufs.
p | the source pbuf |
layer | pbuf_layer of the new pbuf |
Definition at line 1088 of file pbuf.c.
References ERR_ARG, ERR_OK, FOLD_U32T, pbuf::len, LWIP_ASSERT, pbuf::next, NULL, pbuf::payload, pbuf_alloc(), pbuf_copy(), pbuf_free(), PBUF_RAM, SWAP_BYTES_IN_WORD, and pbuf::tot_len.
Create PBUF_RAM copies of pbufs.
Used to queue packets on behalf of the lwIP stack, such as ARP based queueing.
p_to | pbuf destination of the copy |
p_from | pbuf source of the copy |
Definition at line 930 of file pbuf.c.
References ERR_ARG, ERR_OK, ERR_VAL, pbuf::len, LWIP_ASSERT, LWIP_DBG_TRACE, LWIP_DEBUGF, LWIP_ERROR, MEMCPY, NULL, and PBUF_DEBUG.
Referenced by espconn_udp_sendto(), espconn_udp_sent(), netif_set_link_down(), and pbuf_coalesce().
Copy (part of) the contents of a packet buffer to an application supplied buffer.
buf | the pbuf from which to copy data |
dataptr | the application supplied buffer |
len | length of data to copy (dataptr must be big enough). No more than buf->tot_len will be copied, irrespective of len |
offset | offset into the packet buffer from where to begin copying len bytes |
Definition at line 996 of file pbuf.c.
References pbuf::len, LWIP_ERROR, MEMCPY, pbuf::next, NULL, and pbuf::payload.
Referenced by espconn_client_recv(), espconn_server_recv(), and espconn_udp_recv().
Dechains the first pbuf from its succeeding pbufs in the chain.
Makes p->tot_len field equal to p->len.
p | pbuf to dechain |
Definition at line 881 of file pbuf.c.
References pbuf::len, LWIP_ASSERT, LWIP_DBG_TRACE, LWIP_DEBUGF, pbuf::next, NULL, PBUF_DEBUG, pbuf_free(), and pbuf::tot_len.
Dereference a pbuf chain or queue and deallocate any no-longer-used pbufs at the head of this chain or queue.
Decrements the pbuf reference count. If it reaches zero, the pbuf is deallocated.
For a pbuf chain, this is repeated for each pbuf in the chain, up to the first pbuf which has a non-zero reference count after decrementing. So, when all reference counts are one, the whole chain is free'd.
p | The pbuf (chain) to be dereferenced. |
Definition at line 685 of file pbuf.c.
References LWIP_ASSERT, LWIP_DBG_LEVEL_SERIOUS, LWIP_DBG_TRACE, LWIP_DEBUGF, mem_free(), memp_free(), pbuf::next, NULL, PBUF_DEBUG, PBUF_FLAG_IS_CUSTOM, PBUF_POOL, PBUF_RAM, PBUF_REF, PBUF_ROM, PERF_START, PERF_STOP, pbuf::ref, SYS_ARCH_DECL_PROTECT, SYS_ARCH_PROTECT, SYS_ARCH_UNPROTECT, pbuf::type, and U16_F.
Referenced by espconn_client_recv(), espconn_server_recv(), espconn_udp_recv(), espconn_udp_sendto(), espconn_udp_sent(), handle_dhcp(), ip_input(), my_input_ap(), netif_set_link_down(), pbuf_alloc(), pbuf_coalesce(), pbuf_dechain(), pbuf_free_int(), pbuf_realloc(), send_ack(), send_nak(), and send_offer().
Get one byte from the specified position in a pbuf WARNING: returns zero for offset >= p->tot_len
p | pbuf to parse |
offset | offset into p of the byte to return |
Definition at line 1155 of file pbuf.c.
References pbuf::len, pbuf::next, NULL, and pbuf::payload.
Referenced by pbuf_memcmp().
Adjusts the payload pointer to hide or reveal headers in the payload.
Adjusts the ->payload pointer so that space for a header (dis)appears in the pbuf payload.
The ->payload, ->tot_len and ->len fields are adjusted.
p | pbuf to change the header size. |
header_size_increment | Number of bytes to increment header size which increases the size of the pbuf. New space is on the front. (Using a negative value decreases the header size.) If hdr_size_inc is 0, this function does nothing and returns succesful. |
PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so the call will fail. A check is made that the increase in header size does not move the payload pointer in front of the start of the buffer.
Definition at line 573 of file pbuf.c.
References EP_OFFSET, pbuf::len, LWIP_ASSERT, LWIP_DBG_LEVEL_SERIOUS, LWIP_DBG_TRACE, LWIP_DEBUGF, LWIP_ERROR, NULL, pbuf::payload, PBUF_DEBUG, PBUF_POOL, PBUF_RAM, PBUF_REF, PBUF_ROM, S16_F, SIZEOF_STRUCT_PBUF, pbuf::tot_len, and pbuf::type.
Referenced by ip_output_if().
Compare pbuf contents at specified offset with memory s2, both of length n
p | pbuf to compare |
offset | offset into p at wich to start comparing |
s2 | buffer to compare |
n | length of buffer to compare |
Definition at line 1182 of file pbuf.c.
References pbuf::len, pbuf::next, NULL, and pbuf_get_at().
Referenced by pbuf_memfind().
Find occurrence of mem (with length mem_len) in pbuf p, starting at offset start_offset.
p | pbuf to search, maximum length is 0xFFFE since 0xFFFF is used as return value 'not found' |
mem | search for the contents of this buffer |
mem_len | length of 'mem' |
start_offset | offset into p at which to start searching |
Definition at line 1218 of file pbuf.c.
References pbuf_memcmp(), and pbuf::tot_len.
Referenced by pbuf_strstr().
Shrink a pbuf chain to a desired length.
p | pbuf to shrink. |
new_len | desired new length of pbuf chain |
Depending on the desired length, the first few pbufs in a chain might be skipped and left unchanged. The new last pbuf in the chain will be resized, and any remaining pbufs will be freed.
Definition at line 492 of file pbuf.c.
References pbuf::len, LWIP_ASSERT, mem_trim(), pbuf::next, NULL, pbuf::payload, pbuf_free(), PBUF_POOL, PBUF_RAM, PBUF_REF, PBUF_ROM, pbuf::tot_len, and pbuf::type.
Referenced by ip_input().
void pbuf_ref | ( | struct pbuf * | p | ) |
Increment the reference count of the pbuf.
p | pbuf to increase reference counter of |
Definition at line 801 of file pbuf.c.
References NULL, pbuf::ref, SYS_ARCH_DECL_PROTECT, SYS_ARCH_PROTECT, and SYS_ARCH_UNPROTECT.
Referenced by pbuf_chain().
Find occurrence of substr with length substr_len in pbuf p, start at offset start_offset WARNING: in contrast to strstr(), this one does not stop at the first \0 in the pbuf/source string!
p | pbuf to search, maximum length is 0xFFFE since 0xFFFF is used as return value 'not found' |
substr | string to search for in p, maximum length is 0xFFFE |
Definition at line 1246 of file pbuf.c.
References NULL, os_strlen, pbuf_memfind(), and pbuf::tot_len.
Copy application supplied data into a pbuf. This function can only be used to copy the equivalent of buf->tot_len data.
buf | pbuf to fill with data |
dataptr | application supplied data buffer |
len | length of the application supplied data buffer |
Definition at line 1044 of file pbuf.c.
References ERR_ARG, ERR_OK, pbuf::len, LWIP_ASSERT, LWIP_ERROR, MEMCPY, pbuf::next, NULL, pbuf::payload, and pbuf::tot_len.