mirror of
https://github.com/lwip-tcpip/lwip.git
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Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions from api/api_lib". Now netbuf API is independant of netconn, and can be used with other API (application based on raw API, or future "socket2" API). Ports maintainers just have to add src/api/netbuf.c in their makefile/projects.
This commit is contained in:
fbernon
parent
3101bdf127
commit
245bce04d1
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@ -19,6 +19,12 @@ HISTORY
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++ New features:
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2007-08-30 Frédéric Bernon
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* Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions
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from api/api_lib". Now netbuf API is independant of netconn, and can be used
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with other API (application based on raw API, or future "socket2" API). Ports
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maintainers just have to add src/api/netbuf.c in their makefile/projects.
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2007-08-30 Frédéric Bernon, Jonathan Larmour
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* init.c: Add first version of lwip_sanity_check for task #7142 "Sanity check
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user-configurable values".
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@ -47,204 +47,6 @@
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#include "lwip/memp.h"
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#if !NO_SYS
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/**
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**********************************
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* Netbuf functions
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**********************************
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*/
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/**
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* Create (allocate) and initialize a new netbuf.
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* The netbuf doesn't yet contain a packet buffer!
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*
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* @return a pointer to a new netbuf
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* NULL on lack of memory
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*/
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struct
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netbuf *netbuf_new(void)
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{
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struct netbuf *buf;
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buf = memp_malloc(MEMP_NETBUF);
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if (buf != NULL) {
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buf->p = NULL;
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buf->ptr = NULL;
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buf->addr = NULL;
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return buf;
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} else {
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return NULL;
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}
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}
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/**
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* Deallocate a netbuf allocated by netbuf_new().
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*
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* @param buf pointer to a netbuf allocated by netbuf_new()
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*/
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void
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netbuf_delete(struct netbuf *buf)
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{
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if (buf != NULL) {
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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buf->p = buf->ptr = NULL;
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}
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memp_free(MEMP_NETBUF, buf);
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}
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}
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/**
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* Allocate memory for a packet buffer for a given netbuf.
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*
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* @param buf the netbuf for which to allocate a packet buffer
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* @param size the size of the packet buffer to allocate
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* @return pointer to the allocated memory
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* NULL if no memory could be allocated
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*/
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void *
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netbuf_alloc(struct netbuf *buf, u16_t size)
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{
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LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
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/* Deallocate any previously allocated memory. */
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
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if (buf->p == NULL) {
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return NULL;
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}
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LWIP_ASSERT("check that first pbuf can hold size",
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(buf->p->len >= size));
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buf->ptr = buf->p;
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return buf->p->payload;
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}
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/**
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* Free the packet buffer included in a netbuf
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*
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* @param buf pointer to the netbuf which contains the packet buffer to free
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*/
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void
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netbuf_free(struct netbuf *buf)
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{
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LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = buf->ptr = NULL;
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}
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/**
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* Let a netbuf reference existing (non-volatile) data.
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*
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* @param buf netbuf which should reference the data
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* @param dataptr pointer to the data to reference
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* @param size size of the data
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* @return ERR_OK if data is referenced
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* ERR_MEM if data couldn't be referenced due to lack of memory
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*/
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err_t
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netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
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{
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LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
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if (buf->p == NULL) {
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buf->ptr = NULL;
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return ERR_MEM;
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}
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buf->p->payload = (void*)dataptr;
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buf->p->len = buf->p->tot_len = size;
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buf->ptr = buf->p;
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return ERR_OK;
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}
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/**
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* Chain one netbuf to another (@see pbuf_chain)
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*
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* @param head the first netbuf
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* @param tail netbuf to chain after head
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*/
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void
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netbuf_chain(struct netbuf *head, struct netbuf *tail)
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{
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LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
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LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
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pbuf_chain(head->p, tail->p);
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head->ptr = head->p;
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memp_free(MEMP_NETBUF, tail);
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}
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/**
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* Get the data pointer and length of the data inside a netbuf.
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*
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* @param buf netbuf to get the data from
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* @param dataptr pointer to a void pointer where to store the data pointer
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* @param len pointer to an u16_t where the length of the data is stored
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* @return ERR_OK if the information was retreived,
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* ERR_BUF on error.
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*/
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err_t
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netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
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{
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LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
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LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
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LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
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if (buf->ptr == NULL) {
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return ERR_BUF;
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}
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*dataptr = buf->ptr->payload;
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*len = buf->ptr->len;
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return ERR_OK;
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}
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/**
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* Move the current data pointer of a packet buffer contained in a netbuf
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* to the next part.
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* The packet buffer itself is not modified.
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*
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* @param buf the netbuf to modify
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* @return -1 if there is no next part
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* 1 if moved to the next part but now there is no next part
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* 0 if moved to the next part and there are still more parts
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*/
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s8_t
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netbuf_next(struct netbuf *buf)
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{
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LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
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if (buf->ptr->next == NULL) {
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return -1;
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}
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buf->ptr = buf->ptr->next;
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if (buf->ptr->next == NULL) {
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return 1;
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}
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return 0;
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}
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/**
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* Move the current data pointer of a packet buffer contained in a netbuf
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* to the beginning of the packet.
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* The packet buffer itself is not modified.
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*
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* @param buf the netbuf to modify
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*/
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void
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netbuf_first(struct netbuf *buf)
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{
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LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
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buf->ptr = buf->p;
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}
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/**
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**********************************
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* Netconn functions
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**********************************
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*/
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/**
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* Create a new netconn (of a specific type) that has a callback function.
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229
src/api/netbuf.c
Normal file
229
src/api/netbuf.c
Normal file
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@ -0,0 +1,229 @@
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/**
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* @file
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* Network buffer management
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include <string.h>
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#include "lwip/opt.h"
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#include "lwip/netbuf.h"
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#include "lwip/memp.h"
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/**
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* Create (allocate) and initialize a new netbuf.
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* The netbuf doesn't yet contain a packet buffer!
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*
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* @return a pointer to a new netbuf
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* NULL on lack of memory
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*/
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struct
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netbuf *netbuf_new(void)
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{
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struct netbuf *buf;
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buf = memp_malloc(MEMP_NETBUF);
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if (buf != NULL) {
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buf->p = NULL;
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buf->ptr = NULL;
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buf->addr = NULL;
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return buf;
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} else {
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return NULL;
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}
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}
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/**
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* Deallocate a netbuf allocated by netbuf_new().
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*
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* @param buf pointer to a netbuf allocated by netbuf_new()
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*/
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void
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netbuf_delete(struct netbuf *buf)
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{
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if (buf != NULL) {
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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buf->p = buf->ptr = NULL;
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}
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memp_free(MEMP_NETBUF, buf);
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}
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}
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/**
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* Allocate memory for a packet buffer for a given netbuf.
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*
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* @param buf the netbuf for which to allocate a packet buffer
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* @param size the size of the packet buffer to allocate
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* @return pointer to the allocated memory
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* NULL if no memory could be allocated
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*/
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void *
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netbuf_alloc(struct netbuf *buf, u16_t size)
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{
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LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
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/* Deallocate any previously allocated memory. */
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
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if (buf->p == NULL) {
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return NULL;
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}
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LWIP_ASSERT("check that first pbuf can hold size",
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(buf->p->len >= size));
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buf->ptr = buf->p;
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return buf->p->payload;
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}
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/**
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* Free the packet buffer included in a netbuf
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*
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* @param buf pointer to the netbuf which contains the packet buffer to free
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*/
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void
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netbuf_free(struct netbuf *buf)
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{
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LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = buf->ptr = NULL;
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}
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/**
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* Let a netbuf reference existing (non-volatile) data.
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*
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* @param buf netbuf which should reference the data
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* @param dataptr pointer to the data to reference
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* @param size size of the data
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* @return ERR_OK if data is referenced
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* ERR_MEM if data couldn't be referenced due to lack of memory
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*/
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err_t
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netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
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{
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LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
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if (buf->p != NULL) {
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pbuf_free(buf->p);
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}
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buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
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if (buf->p == NULL) {
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buf->ptr = NULL;
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return ERR_MEM;
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}
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buf->p->payload = (void*)dataptr;
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buf->p->len = buf->p->tot_len = size;
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buf->ptr = buf->p;
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return ERR_OK;
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}
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/**
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* Chain one netbuf to another (@see pbuf_chain)
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*
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* @param head the first netbuf
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* @param tail netbuf to chain after head
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*/
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void
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netbuf_chain(struct netbuf *head, struct netbuf *tail)
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{
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LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
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LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
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pbuf_chain(head->p, tail->p);
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head->ptr = head->p;
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memp_free(MEMP_NETBUF, tail);
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}
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/**
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* Get the data pointer and length of the data inside a netbuf.
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*
|
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* @param buf netbuf to get the data from
|
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* @param dataptr pointer to a void pointer where to store the data pointer
|
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* @param len pointer to an u16_t where the length of the data is stored
|
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* @return ERR_OK if the information was retreived,
|
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* ERR_BUF on error.
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*/
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err_t
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netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
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{
|
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LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
|
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LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
|
||||
LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
|
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|
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if (buf->ptr == NULL) {
|
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return ERR_BUF;
|
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}
|
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*dataptr = buf->ptr->payload;
|
||||
*len = buf->ptr->len;
|
||||
return ERR_OK;
|
||||
}
|
||||
|
||||
/**
|
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* Move the current data pointer of a packet buffer contained in a netbuf
|
||||
* to the next part.
|
||||
* The packet buffer itself is not modified.
|
||||
*
|
||||
* @param buf the netbuf to modify
|
||||
* @return -1 if there is no next part
|
||||
* 1 if moved to the next part but now there is no next part
|
||||
* 0 if moved to the next part and there are still more parts
|
||||
*/
|
||||
s8_t
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netbuf_next(struct netbuf *buf)
|
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{
|
||||
LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
|
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if (buf->ptr->next == NULL) {
|
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return -1;
|
||||
}
|
||||
buf->ptr = buf->ptr->next;
|
||||
if (buf->ptr->next == NULL) {
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Move the current data pointer of a packet buffer contained in a netbuf
|
||||
* to the beginning of the packet.
|
||||
* The packet buffer itself is not modified.
|
||||
*
|
||||
* @param buf the netbuf to modify
|
||||
*/
|
||||
void
|
||||
netbuf_first(struct netbuf *buf)
|
||||
{
|
||||
LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
|
||||
buf->ptr = buf->p;
|
||||
}
|
||||
|
|
@ -34,6 +34,7 @@
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|
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#include "lwip/opt.h"
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#include "lwip/pbuf.h"
|
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#include "lwip/netbuf.h"
|
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#include "lwip/sys.h"
|
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|
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#include "lwip/ip.h"
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|
|
@ -93,12 +94,6 @@ enum netconn_igmp {
|
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};
|
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#endif /* LWIP_IGMP */
|
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|
||||
struct netbuf {
|
||||
struct pbuf *p, *ptr;
|
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struct ip_addr *addr;
|
||||
u16_t port;
|
||||
};
|
||||
|
||||
struct netconn {
|
||||
enum netconn_type type;
|
||||
enum netconn_state state;
|
||||
|
|
@ -132,29 +127,6 @@ struct netconn {
|
|||
void (* callback)(struct netconn *, enum netconn_evt, u16_t len);
|
||||
};
|
||||
|
||||
/* Network buffer functions: */
|
||||
struct netbuf * netbuf_new (void);
|
||||
void netbuf_delete (struct netbuf *buf);
|
||||
void * netbuf_alloc (struct netbuf *buf, u16_t size);
|
||||
void netbuf_free (struct netbuf *buf);
|
||||
err_t netbuf_ref (struct netbuf *buf,
|
||||
const void *dataptr, u16_t size);
|
||||
void netbuf_chain (struct netbuf *head,
|
||||
struct netbuf *tail);
|
||||
|
||||
u16_t netbuf_len (struct netbuf *buf);
|
||||
err_t netbuf_data (struct netbuf *buf,
|
||||
void **dataptr, u16_t *len);
|
||||
s8_t netbuf_next (struct netbuf *buf);
|
||||
void netbuf_first (struct netbuf *buf);
|
||||
|
||||
|
||||
#define netbuf_copy_partial(buf, dataptr, len, offset) \
|
||||
pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
|
||||
#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
|
||||
#define netbuf_len(buf) ((buf)->p->tot_len)
|
||||
#define netbuf_fromaddr(buf) ((buf)->addr)
|
||||
#define netbuf_fromport(buf) ((buf)->port)
|
||||
|
||||
/* Network connection functions: */
|
||||
#define netconn_new(t) netconn_new_with_proto_and_callback(t, 0, NULL)
|
||||
|
|
|
|||
76
src/include/lwip/netbuf.h
Normal file
76
src/include/lwip/netbuf.h
Normal file
|
|
@ -0,0 +1,76 @@
|
|||
/*
|
||||
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
||||
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
||||
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
||||
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
||||
* OF SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the lwIP TCP/IP stack.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
*/
|
||||
#ifndef __LWIP_NETBUF_H__
|
||||
#define __LWIP_NETBUF_H__
|
||||
|
||||
#include "lwip/opt.h"
|
||||
#include "lwip/pbuf.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
struct netbuf {
|
||||
struct pbuf *p, *ptr;
|
||||
struct ip_addr *addr;
|
||||
u16_t port;
|
||||
};
|
||||
|
||||
/* Network buffer functions: */
|
||||
struct netbuf * netbuf_new (void);
|
||||
void netbuf_delete (struct netbuf *buf);
|
||||
void * netbuf_alloc (struct netbuf *buf, u16_t size);
|
||||
void netbuf_free (struct netbuf *buf);
|
||||
err_t netbuf_ref (struct netbuf *buf,
|
||||
const void *dataptr, u16_t size);
|
||||
void netbuf_chain (struct netbuf *head,
|
||||
struct netbuf *tail);
|
||||
|
||||
u16_t netbuf_len (struct netbuf *buf);
|
||||
err_t netbuf_data (struct netbuf *buf,
|
||||
void **dataptr, u16_t *len);
|
||||
s8_t netbuf_next (struct netbuf *buf);
|
||||
void netbuf_first (struct netbuf *buf);
|
||||
|
||||
|
||||
#define netbuf_copy_partial(buf, dataptr, len, offset) \
|
||||
pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
|
||||
#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
|
||||
#define netbuf_len(buf) ((buf)->p->tot_len)
|
||||
#define netbuf_fromaddr(buf) ((buf)->addr)
|
||||
#define netbuf_fromport(buf) ((buf)->port)
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __LWIP_NETBUF_H__ */
|
||||
Loading…
Reference in New Issue
Block a user