static inline struct pbuf *netfront_init_rxpbuf(struct net_rxbuffer *buf, struct netfront_dev *dev)
{
struct pbuf *p;
p = pbuf_alloced_custom(PBUF_RAW, PAGE_SIZE, PBUF_REF, &buf->cpbuf, buf->page, PAGE_SIZE);
if (p == NULL)
return NULL;
buf->dev = dev;
buf->cpbuf.custom_free_function = netfront_free_rxpbuf;
return p;
}
static struct pbuf*
pcapif_rx_ref(struct pbuf* p)
{
struct pcapif_pbuf_custom* ppc;
struct pbuf* q;
LWIP_ASSERT("NULL pointer", p != NULL);
LWIP_ASSERT("chained pbuf not supported here", p->next == NULL);
ppc = (struct pcapif_pbuf_custom*)mem_malloc(sizeof(struct pcapif_pbuf_custom));
LWIP_ASSERT("out of memory for RX", ppc != NULL);
ppc->pc.custom_free_function = pcapif_rx_pbuf_free_custom;
ppc->p = p;
q = pbuf_alloced_custom(PBUF_RAW, p->tot_len, PBUF_REF, &ppc->pc, p->payload, p->tot_len);
LWIP_ASSERT("pbuf_alloced_custom returned NULL", q != NULL);
return q;
}
void eth_rx_irq()
{
dma_descriptor* dma_desc = get_RX_DMA_descriptor_from_ethernet();
my_custom_pbuf_t* my_pbuf = (my_custom_pbuf_t*)LWIP_MEMPOOL_ALLOC(RX_POOL);
my_pbuf->p.custom_free_function = my_pbuf_free_custom;
my_pbuf->dma_descriptor = dma_desc;
invalidate_cpu_cache(dma_desc->rx_data, dma_desc->rx_length);
struct pbuf* p = pbuf_alloced_custom(PBUF_RAW,
dma_desc->rx_length,
PBUF_REF,
&my_pbuf->p,
dma_desc->rx_data,
dma_desc->max_buffer_size);
if(netif->input(p, netif) != ERR_OK) {
pbuf_free(p);
}
}
/**
* Fragment an IP datagram if too large for the netif.
*
* Chop the datagram in MTU sized chunks and send them in order
* by using a fixed size static memory buffer (PBUF_REF) or
* point PBUF_REFs into p (depending on IP_FRAG_USES_STATIC_BUF).
*
* @param p ip packet to send
* @param netif the netif on which to send
* @param dest destination ip address to which to send
*
* @return ERR_OK if sent successfully, err_t otherwise
*/
err_t
ip_frag(struct pbuf *p, struct netif *netif, ip_addr_t *dest)
{
struct pbuf *rambuf;
#if IP_FRAG_USES_STATIC_BUF
struct pbuf *header;
#else
#if !LWIP_NETIF_TX_SINGLE_PBUF
struct pbuf *newpbuf;
#endif
struct ip_hdr *original_iphdr;
#endif
struct ip_hdr *iphdr;
u16_t nfb;
u16_t left, cop;
u16_t mtu = netif->mtu;
u16_t ofo, omf;
u16_t last;
u16_t poff = IP_HLEN;
u16_t tmp;
#if !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF
u16_t newpbuflen = 0;
u16_t left_to_copy;
#endif
/* Get a RAM based MTU sized pbuf */
#if IP_FRAG_USES_STATIC_BUF
/* When using a static buffer, we use a PBUF_REF, which we will
* use to reference the packet (without link header).
* Layer and length is irrelevant.
*/
rambuf = pbuf_alloc(PBUF_LINK, 0, PBUF_REF);
if (rambuf == NULL) {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc(PBUF_LINK, 0, PBUF_REF) failed\n"));
return ERR_MEM;
}
rambuf->tot_len = rambuf->len = mtu;
rambuf->payload = LWIP_MEM_ALIGN((void *)buf);
/* Copy the IP header in it */
iphdr = (struct ip_hdr *)rambuf->payload;
SMEMCPY(iphdr, p->payload, IP_HLEN);
#else /* IP_FRAG_USES_STATIC_BUF */
original_iphdr = (struct ip_hdr *)p->payload;
iphdr = original_iphdr;
#endif /* IP_FRAG_USES_STATIC_BUF */
/* Save original offset */
tmp = ntohs(IPH_OFFSET(iphdr));
ofo = tmp & IP_OFFMASK;
omf = tmp & IP_MF;
left = p->tot_len - IP_HLEN;
nfb = (mtu - IP_HLEN) / 8;
while (left) {
last = (left <= mtu - IP_HLEN);
/* Set new offset and MF flag */
tmp = omf | (IP_OFFMASK & (ofo));
if (!last) {
tmp = tmp | IP_MF;
}
/* Fill this fragment */
cop = last ? left : nfb * 8;
#if IP_FRAG_USES_STATIC_BUF
poff += pbuf_copy_partial(p, (u8_t*)iphdr + IP_HLEN, cop, poff);
#else /* IP_FRAG_USES_STATIC_BUF */
#if LWIP_NETIF_TX_SINGLE_PBUF
rambuf = pbuf_alloc(PBUF_IP, cop, PBUF_RAM);
if (rambuf == NULL) {
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len == rambuf->tot_len) && (rambuf->next == NULL));
poff += pbuf_copy_partial(p, rambuf->payload, cop, poff);
/* make room for the IP header */
if(pbuf_header(rambuf, IP_HLEN)) {
pbuf_free(rambuf);
return ERR_MEM;
}
/* fill in the IP header */
SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN);
iphdr = rambuf->payload;
#else /* LWIP_NETIF_TX_SINGLE_PBUF */
/* When not using a static buffer, create a chain of pbufs.
* The first will be a PBUF_RAM holding the link and IP header.
* The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
* but limited to the size of an mtu.
*/
rambuf = pbuf_alloc(PBUF_LINK, IP_HLEN, PBUF_RAM);
if (rambuf == NULL) {
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(p->len >= (IP_HLEN)));
SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN);
iphdr = (struct ip_hdr *)rambuf->payload;
/* Can just adjust p directly for needed offset. */
p->payload = (u8_t *)p->payload + poff;
p->len -= poff;
left_to_copy = cop;
while (left_to_copy) {
struct pbuf_custom_ref *pcr;
newpbuflen = (left_to_copy < p->len) ? left_to_copy : p->len;
/* Is this pbuf already empty? */
if (!newpbuflen) {
p = p->next;
continue;
}
pcr = ip_frag_alloc_pbuf_custom_ref();
if (pcr == NULL) {
pbuf_free(rambuf);
return ERR_MEM;
}
/* Mirror this pbuf, although we might not need all of it. */
newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc, p->payload, newpbuflen);
if (newpbuf == NULL) {
ip_frag_free_pbuf_custom_ref(pcr);
pbuf_free(rambuf);
return ERR_MEM;
}
pbuf_ref(p);
pcr->original = p;
pcr->pc.custom_free_function = ipfrag_free_pbuf_custom;
/* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain
* so that it is removed when pbuf_dechain is later called on rambuf.
*/
pbuf_cat(rambuf, newpbuf);
left_to_copy -= newpbuflen;
if (left_to_copy) {
p = p->next;
}
}
poff = newpbuflen;
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
#endif /* IP_FRAG_USES_STATIC_BUF */
/* Correct header */
IPH_OFFSET_SET(iphdr, htons(tmp));
IPH_LEN_SET(iphdr, htons(cop + IP_HLEN));
IPH_CHKSUM_SET(iphdr, 0);
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
#if IP_FRAG_USES_STATIC_BUF
if (last) {
pbuf_realloc(rambuf, left + IP_HLEN);
}
/* This part is ugly: we alloc a RAM based pbuf for
* the link level header for each chunk and then
* free it.A PBUF_ROM style pbuf for which pbuf_header
* worked would make things simpler.
*/
header = pbuf_alloc(PBUF_LINK, 0, PBUF_RAM);
if (header != NULL) {
pbuf_chain(header, rambuf);
netif->output(netif, header, dest);
IPFRAG_STATS_INC(ip_frag.xmit);
snmp_inc_ipfragcreates();
pbuf_free(header);
} else {
LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc() for header failed\n"));
pbuf_free(rambuf);
return ERR_MEM;
}
#else /* IP_FRAG_USES_STATIC_BUF */
/* No need for separate header pbuf - we allowed room for it in rambuf
* when allocated.
*/
netif->output(netif, rambuf, dest);
IPFRAG_STATS_INC(ip_frag.xmit);
/* Unfortunately we can't reuse rambuf - the hardware may still be
* using the buffer. Instead we free it (and the ensuing chain) and
* recreate it next time round the loop. If we're lucky the hardware
* will have already sent the packet, the free will really free, and
* there will be zero memory penalty.
*/
pbuf_free(rambuf);
#endif /* IP_FRAG_USES_STATIC_BUF */
left -= cop;
ofo += nfb;
}
#if IP_FRAG_USES_STATIC_BUF
pbuf_free(rambuf);
#endif /* IP_FRAG_USES_STATIC_BUF */
snmp_inc_ipfragoks();
return ERR_OK;
}
/**
* Receive callback function for TCP connect.
*/
static err_t net_tcp_recv_cb(void *arg,
struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
struct tls_netconn *conn;
struct tls_netconn *server_conn = NULL;
err_t err_ret = ERR_OK;
u16 datalen = 0;
#if (RAW_SOCKET_USE_CUSTOM_PBUF)
struct raw_sk_pbuf_custom *pcr = NULL;
struct pbuf *newpbuf = NULL;
#endif
struct pbuf *p_tmp,*p_next;
// TLS_DBGPRT_INFO("net_tcp_recv_cb err=%d\n", err);
LWIP_UNUSED_ARG(pcb);
LWIP_ASSERT("must have a pcb argument", pcb != NULL);
LWIP_ASSERT("must have an argument", arg != NULL);
conn = (struct tls_netconn *)arg;
LWIP_ASSERT("tcp recv for wrong pcb!", conn->pcb.tcp == pcb);
if (err) {
/* tcp is disconnect */
TLS_DBGPRT_INFO("err code = %d\n", err);
err_ret = err;
#if 0
if (conn->pcb.tcp != NULL) {
tcp_arg(conn->pcb.tcp, NULL);
tcp_accept(conn->pcb.tcp, NULL);
tcp_recv(conn->pcb.tcp, NULL);
tcp_sent(conn->pcb.tcp, NULL);
tcp_poll(conn->pcb.tcp, NULL, 4);
tcp_err(conn->pcb.tcp, NULL);
tcp_close(conn->pcb.tcp);
conn->state = NETCONN_STATE_NONE;
net_send_event_to_hostif(conn, NET_EVENT_TCP_DISCONNECT);
conn->pcb.tcp = NULL;
net_free_socket(conn);
}
#endif
if(conn->skd != NULL && conn->skd->recvf != NULL)
{
TLS_DBGPRT_INFO("conn->skd->recvf to call.");
err_ret = conn->skd->recvf(conn->skt_num, p, err);
if(err_ret == ERR_ABRT)
tcp_abort(pcb);
}
if (p){
pbuf_free(p);
p = NULL;
}
return err_ret;
}
if (pcb == NULL ||conn == NULL) {//p == NULL ||
TLS_DBGPRT_INFO("pcb = 0x%x, p = 0x%x\n", pcb ,p);
return ERR_VAL;
}
if(p == NULL)
{
TLS_DBGPRT_ERR("received 0\n");
net_tcp_err_cb(conn, ERR_OK);
return ERR_OK;
}
#if 0//(RAW_SOCKET_USE_CUSTOM_PBUF)
pcr = raw_sk_alloc_pbuf_custom();
if(pcr == NULL)
{
return ERR_MEM;
}
//newpbuf = pbuf_alloced_custom(PBUF_RAW, p->tot_len, PBUF_REF, &pcr->pc, p->payload, p->tot_len);
//使用上面的函数，当pbuf是链表结构时会被截断导致应用层拷贝数据出错
newpbuf = &(pcr->pc);
newpbuf->len = 0;
newpbuf->payload = NULL;
newpbuf->tot_len = p->tot_len;
newpbuf->next = p;
newpbuf->flags = PBUF_FLAG_IS_CUSTOM;
newpbuf->type = PBUF_REF;
newpbuf->ref =1;
if (newpbuf == NULL) {
raw_sk_free_pbuf_custom(pcr);
return ERR_MEM;
}
pcr->original = p;
pcr->param = pcb;
pcr->pc.custom_free_function = raw_sk_free_pbuf_custom_fn;
#endif
#if !RAW_SOCKET_USE_CUSTOM_PBUF
tcp_recved(pcb, p->tot_len);
#endif
if(conn->client && conn->idle_time > 0)
{
TLS_DBGPRT_INFO("conn->skt_num=%d, conn->client=%d\n", conn->skt_num, conn->client);
// server_conn = dl_list_first(&conn->list, struct tls_netconn, list);
server_conn = get_server_conn(conn);
TLS_DBGPRT_INFO("server_conn=%p\n", server_conn);
if(server_conn)
{
conn->idle_time = server_conn->idle_time;
TLS_DBGPRT_INFO("update conn->idle_time %d\n", conn->idle_time);
}
}
if(conn->skd->recvf != NULL)
{
tls_net_set_sourceip(pcb->remote_ip.addr);
datalen = p->tot_len;
p_next = p;
for(p_tmp = p; p_tmp != NULL; )
{
p_next = p_tmp->next;
p_tmp->next = NULL; //把后面的pbuf截断
if(p_next != NULL)
printf("\npbufcat p next=%d\n",p_next);
#if (RAW_SOCKET_USE_CUSTOM_PBUF)
pcr = raw_sk_alloc_pbuf_custom();
if(pcr == NULL)
{
return ERR_MEM;
}
newpbuf = pbuf_alloced_custom(PBUF_RAW, p_tmp->len, PBUF_REF, &pcr->pc, p_tmp->payload, p_tmp->len);
if (newpbuf == NULL) {
raw_sk_free_pbuf_custom(pcr);
return ERR_MEM;
}
pcr->original = p_tmp;
pcr->param = pcb;
pcr->pc.custom_free_function = raw_sk_free_pbuf_custom_fn;
conn->skd->recvf(conn->skt_num, newpbuf, ERR_OK);
#else
conn->skd->recvf(conn->skt_num, p_tmp, ERR_OK);
#endif
p_tmp = p_next;
}
if (conn->skd->recvwithipf != NULL){
conn->skd->recvwithipf(conn->skt_num, datalen, (u8 *)(&(pcb->remote_ip.addr)), pcb->remote_port, ERR_OK);
}
}
else
{
#if 0//(RAW_SOCKET_USE_CUSTOM_PBUF)
raw_sk_free_pbuf_custom(pcr);
#endif
if (p)
pbuf_free(p);
}
return err_ret;
}
/**
* Fragment an IPv6 datagram if too large for the netif or path MTU.
*
* Chop the datagram in MTU sized chunks and send them in order
* by pointing PBUF_REFs into p
*
* @param p ipv6 packet to send
* @param netif the netif on which to send
* @param dest destination ipv6 address to which to send
*
* @return ERR_OK if sent successfully, err_t otherwise
*/
err_t
ip6_frag(struct pbuf *p, struct netif *netif, const ip6_addr_t *dest)
{
struct ip6_hdr *original_ip6hdr;
struct ip6_hdr *ip6hdr;
struct ip6_frag_hdr *frag_hdr;
struct pbuf *rambuf;
#if !LWIP_NETIF_TX_SINGLE_PBUF
struct pbuf *newpbuf;
u16_t newpbuflen = 0;
u16_t left_to_copy;
#endif
static u32_t identification;
u16_t nfb;
u16_t left, cop;
u16_t mtu;
u16_t fragment_offset = 0;
u16_t last;
u16_t poff = IP6_HLEN;
identification++;
original_ip6hdr = (struct ip6_hdr *)p->payload;
mtu = nd6_get_destination_mtu(dest, netif);
/* @todo we assume there are no options in the unfragmentable part (IPv6 header). */
left = p->tot_len - IP6_HLEN;
nfb = (mtu - (IP6_HLEN + IP6_FRAG_HLEN)) & IP6_FRAG_OFFSET_MASK;
while (left) {
last = (left <= nfb);
/* Fill this fragment */
cop = last ? left : nfb;
#if LWIP_NETIF_TX_SINGLE_PBUF
rambuf = pbuf_alloc(PBUF_IP, cop + IP6_FRAG_HLEN, PBUF_RAM);
if (rambuf == NULL) {
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(rambuf->len == rambuf->tot_len) && (rambuf->next == NULL));
poff += pbuf_copy_partial(p, (u8_t*)rambuf->payload + IP6_FRAG_HLEN, cop, poff);
/* make room for the IP header */
if (pbuf_header(rambuf, IP6_HLEN)) {
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
/* fill in the IP header */
SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
ip6hdr = (struct ip6_hdr *)rambuf->payload;
frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);
#else
/* When not using a static buffer, create a chain of pbufs.
* The first will be a PBUF_RAM holding the link, IPv6, and Fragment header.
* The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
* but limited to the size of an mtu.
*/
rambuf = pbuf_alloc(PBUF_LINK, IP6_HLEN + IP6_FRAG_HLEN, PBUF_RAM);
if (rambuf == NULL) {
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
LWIP_ASSERT("this needs a pbuf in one piece!",
(p->len >= (IP6_HLEN)));
SMEMCPY(rambuf->payload, original_ip6hdr, IP6_HLEN);
ip6hdr = (struct ip6_hdr *)rambuf->payload;
frag_hdr = (struct ip6_frag_hdr *)((u8_t*)rambuf->payload + IP6_HLEN);
/* Can just adjust p directly for needed offset. */
p->payload = (u8_t *)p->payload + poff;
p->len -= poff;
p->tot_len -= poff;
left_to_copy = cop;
while (left_to_copy) {
struct pbuf_custom_ref *pcr;
newpbuflen = (left_to_copy < p->len) ? left_to_copy : p->len;
/* Is this pbuf already empty? */
if (!newpbuflen) {
p = p->next;
continue;
}
pcr = ip6_frag_alloc_pbuf_custom_ref();
if (pcr == NULL) {
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
/* Mirror this pbuf, although we might not need all of it. */
newpbuf = pbuf_alloced_custom(PBUF_RAW, newpbuflen, PBUF_REF, &pcr->pc, p->payload, newpbuflen);
if (newpbuf == NULL) {
ip6_frag_free_pbuf_custom_ref(pcr);
pbuf_free(rambuf);
IP6_FRAG_STATS_INC(ip6_frag.memerr);
return ERR_MEM;
}
pbuf_ref(p);
pcr->original = p;
pcr->pc.custom_free_function = ip6_frag_free_pbuf_custom;
/* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain
* so that it is removed when pbuf_dechain is later called on rambuf.
*/
pbuf_cat(rambuf, newpbuf);
left_to_copy -= newpbuflen;
if (left_to_copy) {
p = p->next;
}
}
poff = newpbuflen;
#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
/* Set headers */
frag_hdr->_nexth = original_ip6hdr->_nexth;
frag_hdr->reserved = 0;
frag_hdr->_fragment_offset = lwip_htons((fragment_offset & IP6_FRAG_OFFSET_MASK) | (last ? 0 : IP6_FRAG_MORE_FLAG));
frag_hdr->_identification = lwip_htonl(identification);
IP6H_NEXTH_SET(ip6hdr, IP6_NEXTH_FRAGMENT);
IP6H_PLEN_SET(ip6hdr, cop + IP6_FRAG_HLEN);
/* No need for separate header pbuf - we allowed room for it in rambuf
* when allocated.
*/
IP6_FRAG_STATS_INC(ip6_frag.xmit);
netif->output_ip6(netif, rambuf, dest);
/* Unfortunately we can't reuse rambuf - the hardware may still be
* using the buffer. Instead we free it (and the ensuing chain) and
* recreate it next time round the loop. If we're lucky the hardware
* will have already sent the packet, the free will really free, and
* there will be zero memory penalty.
*/
pbuf_free(rambuf);
left -= cop;
fragment_offset += cop;
}
return ERR_OK;
}