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Important bug fixes and improvements.

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This commit is contained in:
marcbou 2003-06-19 11:31:25 +00:00
parent bbc33080e7
commit 55f64f13c7
3 changed files with 172 additions and 153 deletions
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291
src/netif/ppp/ppp.c
View File

@ -121,6 +121,7 @@ typedef enum {
PDDATA /* Process data byte. */
} PPPDevStates;
#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
/************************/
/*** LOCAL DATA TYPES ***/
@ -141,7 +142,6 @@ typedef struct PPPControl_s {
char inEscaped; /* Escape next character. */
u16_t inProtocol; /* The input protocol code. */
u16_t inFCS; /* Input Frame Check Sequence value. */
u16_t inLen; /* Input packet length. */
int mtu; /* Peer's mru */
int pcomp; /* Does peer accept protocol compression? */
int accomp; /* Does peer accept addr/ctl compression? */
@ -155,10 +155,10 @@ typedef struct PPPControl_s {
struct netif *netif;
struct ip_addr our_ipaddr, his_ipaddr, netmask, dns1, dns2;
struct ppp_addrs addrs;
void (*linkStatusCB)(void *arg, int errCode);
void *linkStatusArg;
void (*linkStatusCB)(void *ctx, int errCode, void *arg);
void *linkStatusCtx;
} PPPControl;
@ -180,10 +180,6 @@ struct npioctl {
static void pppMain(void *pd);
static void pppDrop(PPPControl *pc);
static void pppInProc(int pd, u_char *s, int l);
static struct pbuf *pppMPutC(u_char c, ext_accm *outACCM, struct pbuf *nb);
static struct pbuf *pppMPutRaw(u_char c, struct pbuf *nb);
#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
/******************************/
@ -339,7 +335,7 @@ void pppSetAuth(const char *user, const char *passwd)
* established before calling this.
* Return a new PPP connection descriptor on success or
* an error code (negative) on failure. */
int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *arg, int errCode), void *linkStatusArg)
int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx)
{
PPPControl *pc;
int pd;
@ -384,7 +380,7 @@ int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *arg, int errCode), void *lin
pc->outACCM[15] = 0x60;
pc->linkStatusCB = linkStatusCB;
pc->linkStatusArg = linkStatusArg;
pc->linkStatusCtx = linkStatusCtx;
sys_thread_new(pppMain, (void*)pd, PPP_THREAD_PRIO);
if(!linkStatusCB) {
@ -456,6 +452,44 @@ static void nPut(PPPControl *pc, struct pbuf *nb)
#endif /* LINK_STATS */
}
/*
* pppAppend - append given character to end of given pbuf. If outACCM
* is not NULL and the character needs to be escaped, do so.
* If pbuf is full, append another.
* Return the current pbuf.
*/
static struct pbuf *pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM)
{
struct pbuf *tb = nb;
/* Make sure there is room for the character and an escape code.
* Sure we don't quite fill the buffer if the character doesn't
* get escaped but is one character worth complicating this? */
/* Note: We assume no packet header. */
if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (tb) {
nb->next = tb;
}
#ifdef LINK_STATS
else {
lwip_stats.link.memerr++;
}
#endif /* LINK_STATS */
nb = tb;
}
if (nb) {
if (outACCM && ESCAPE_P(*outACCM, c)) {
*((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
*((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
}
else
*((u_char*)nb->payload + nb->len++) = c;
}
return tb;
}
/* Send a packet on the given connection. */
static err_t pppifOutput(struct netif *netif, struct pbuf *pb, struct ip_addr *ipaddr)
{
@ -536,22 +570,22 @@ static err_t pppifOutput(struct netif *netif, struct pbuf *pb, struct ip_addr *i
/* Build the PPP header. */
if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG)
tailMB = pppMPutRaw(PPP_FLAG, tailMB);
tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
pc->lastXMit = sys_jiffies();
if (!pc->accomp) {
fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS);
tailMB = pppMPutC(PPP_ALLSTATIONS, &pc->outACCM, tailMB);
tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM);
fcsOut = PPP_FCS(fcsOut, PPP_UI);
tailMB = pppMPutC(PPP_UI, &pc->outACCM, tailMB);
tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM);
}
if (!pc->pcomp || protocol > 0xFF) {
c = (protocol >> 8) & 0xFF;
fcsOut = PPP_FCS(fcsOut, c);
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
}
c = protocol & 0xFF;
fcsOut = PPP_FCS(fcsOut, c);
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
/* Load packet. */
for(p = pb; p; p = p->next) {
@ -567,16 +601,16 @@ static err_t pppifOutput(struct netif *netif, struct pbuf *pb, struct ip_addr *i
fcsOut = PPP_FCS(fcsOut, c);
/* Copy to output buffer escaping special characters. */
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
}
}
/* Add FCS and trailing flag. */
c = ~fcsOut & 0xFF;
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
c = (~fcsOut >> 8) & 0xFF;
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppMPutRaw(PPP_FLAG, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
/* If we failed to complete the packet, throw it away. */
if (!tailMB) {
@ -685,7 +719,7 @@ int pppWrite(int pd, const u_char *s, int n)
/* If the link has been idle, we'll send a fresh flag character to
* flush any noise. */
if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG)
tailMB = pppMPutRaw(PPP_FLAG, tailMB);
tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
pc->lastXMit = sys_jiffies();
/* Load output buffer. */
@ -696,21 +730,21 @@ int pppWrite(int pd, const u_char *s, int n)
fcsOut = PPP_FCS(fcsOut, c);
/* Copy to output buffer escaping special characters. */
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
}
/* Add FCS and trailing flag. */
c = ~fcsOut & 0xFF;
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
c = (~fcsOut >> 8) & 0xFF;
tailMB = pppMPutC(c, &pc->outACCM, tailMB);
tailMB = pppMPutRaw(PPP_FLAG, tailMB);
tailMB = pppAppend(c, tailMB, &pc->outACCM);
tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
/* If we failed to complete the packet, throw it away.
* Otherwise send it. */
if (!tailMB) {
PPPDEBUG((LOG_WARNING,
"pppWrite[%d]: Alloc err - dropping nBuf len=%d\n", pd, headMB->len));
"pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len));
/* "pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
pbuf_free(headMB);
#ifdef LINK_STATS
@ -927,13 +961,14 @@ int sifup(int pd)
} else {
if(pc->netif)
netif_remove(pc->netif);
pc->netif = netif_add(&pc->our_ipaddr, &pc->netmask, &pc->his_ipaddr, (void *)pd, pppifNetifInit, ip_input);
pc->netif = netif_add(&pc->addrs.our_ipaddr, &pc->addrs.netmask, &pc->addrs.his_ipaddr, (void *)pd, pppifNetifInit, ip_input);
if(pc->netif) {
pc->if_up = 1;
pc->errCode = 0;
pc->errCode = PPPERR_NONE;
if(pc->linkStatusCB)
pc->linkStatusCB(pc->linkStatusArg, pc->errCode);
PPPDEBUG((LOG_DEBUG, "sifup: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
if(pc->linkStatusCB)
pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs);
} else {
st = 0;
PPPDEBUG((LOG_ERR, "sifup[%d]: netif_add failed\n", pd));
@ -948,10 +983,10 @@ int sifup(int pd)
*/
int sifnpmode(int u, int proto, enum NPmode mode)
{
(void)u;
(void)proto;
(void)mode;
return 0;
(void)u;
(void)proto;
(void)mode;
return 0;
}
/*
@ -970,8 +1005,9 @@ int sifdown(int pd)
if(pc->netif)
netif_remove(pc->netif);
pc->netif = NULL;
PPPDEBUG((LOG_DEBUG, "sifdown: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
if(pc->linkStatusCB)
pc->linkStatusCB(pc->linkStatusArg, PPPERR_CONNECT);
pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL);
}
return st;
}
@ -995,11 +1031,11 @@ int sifaddr(
st = 0;
PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
} else {
memcpy(&pc->our_ipaddr, &o, sizeof(o));
memcpy(&pc->his_ipaddr, &h, sizeof(h));
memcpy(&pc->netmask, &m, sizeof(m));
memcpy(&pc->dns1, &ns1, sizeof(ns1));
memcpy(&pc->dns2, &ns2, sizeof(ns2));
memcpy(&pc->addrs.our_ipaddr, &o, sizeof(o));
memcpy(&pc->addrs.his_ipaddr, &h, sizeof(h));
memcpy(&pc->addrs.netmask, &m, sizeof(m));
memcpy(&pc->addrs.dns1, &ns1, sizeof(ns1));
memcpy(&pc->addrs.dns2, &ns2, sizeof(ns2));
}
return st;
}
@ -1023,11 +1059,11 @@ int cifaddr(
st = 0;
PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
} else {
IP4_ADDR(&pc->our_ipaddr, 0,0,0,0);
IP4_ADDR(&pc->his_ipaddr, 0,0,0,0);
IP4_ADDR(&pc->netmask, 255,255,255,0);
IP4_ADDR(&pc->dns1, 0,0,0,0);
IP4_ADDR(&pc->dns2, 0,0,0,0);
IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0);
IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0);
IP4_ADDR(&pc->addrs.netmask, 255,255,255,0);
IP4_ADDR(&pc->addrs.dns1, 0,0,0,0);
IP4_ADDR(&pc->addrs.dns2, 0,0,0,0);
}
return st;
}
@ -1077,6 +1113,7 @@ int cifdefaultroute(int pd, u32_t l, u32_t g)
void
pppMainWakeup(int pd)
{
PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d\n", pd));
sio_read_abort(pppControl[pd].fd);
}
@ -1091,6 +1128,7 @@ pppStartCB(void *arg)
{
int pd = (int)arg;
PPPDEBUG((LOG_DEBUG, "pppStartCB: unit %d\n", pd));
lcp_lowerup(pd);
lcp_open(pd); /* Start protocol */
}
@ -1100,6 +1138,7 @@ pppStopCB(void *arg)
{
int pd = (int)arg;
PPPDEBUG((LOG_DEBUG, "pppStopCB: unit %d\n", pd));
lcp_close(pd, "User request");
}
@ -1108,6 +1147,7 @@ pppHupCB(void *arg)
{
int pd = (int)arg;
PPPDEBUG((LOG_DEBUG, "pppHupCB: unit %d\n", pd));
lcp_lowerdown(pd);
link_terminated(pd);
}
@ -1134,30 +1174,37 @@ static void pppMain(void *arg)
/*
* Start the connection and handle incoming events (packet or timeout).
*/
ppp_trace(LOG_NOTICE, "Connecting\n");
PPPDEBUG((LOG_INFO, "pppMain: unit %d: Connecting\n", pd));
tcpip_callback(pppStartCB, arg);
while (lcp_phase[pd] != PHASE_DEAD) {
if (pc->kill_link) {
PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d kill_link -> pppStopCB\n", pd));
pc->errCode = PPPERR_USER;
/* This will leave us at PHASE_DEAD. */
tcpip_callback(pppStopCB, arg);
pc->kill_link = 0;
}
else if (pc->sig_hup) {
PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d sig_hup -> pppHupCB\n", pd));
pc->sig_hup = 0;
tcpip_callback(pppHupCB, arg);
} else {
int c = sio_read(pc->fd, p->payload, p->len);
if(c > 0) {
pppInProc(pd, p->payload, c);
} else {
PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d sio_read len=%d returned %d\n", pd, p->len, c));
sys_msleep(250); /* give other tasks a chance to run */
}
}
}
PPPDEBUG((LOG_INFO, "pppMain: unit %d: PHASE_DEAD\n", pd));
pbuf_free(p);
out:
PPPDEBUG((LOG_DEBUG, "pppMain: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
if(pc->linkStatusCB)
pc->linkStatusCB(pc->linkStatusArg, pc->errCode ? pc->errCode : PPPERR_PROTOCOL);
pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
pc->openFlag = 0;
}
@ -1227,7 +1274,7 @@ static void pppInput(void *arg)
switch(protocol) {
case PPP_VJC_COMP: /* VJ compressed TCP */
#if VJ_SUPPORT > 0
PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_comp in nBuf len=%d\n", pd, nb->len));
PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len));
/*
* Clip off the VJ header and prepend the rebuilt TCP/IP header and
* pass the result to IP.
@ -1245,7 +1292,7 @@ static void pppInput(void *arg)
break;
case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
#if VJ_SUPPORT > 0
PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_un in nBuf len=%d\n", pd, nb->len));
PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len));
/*
* Process the TCP/IP header for VJ header compression and then pass
* the packet to IP.
@ -1264,7 +1311,7 @@ static void pppInput(void *arg)
#endif /* VJ_SUPPORT > 0 */
break;
case PPP_IP: /* Internet Protocol */
PPPDEBUG((LOG_INFO, "pppInput[%d]: ip in nBuf len=%d", pd, nb->len));
PPPDEBUG((LOG_INFO, "pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len));
pppControl[pd].netif->input(nb, pppControl[pd].netif);
return;
default:
@ -1316,7 +1363,9 @@ static void pppDrop(PPPControl *pc)
#if 0
PPPDEBUG((LOG_INFO, "pppDrop: %d:%.*H\n", pc->inHead->len, min(60, pc->inHead->len * 2), pc->inHead->payload));
#endif
PPPDEBUG((LOG_INFO, "pppDrop: nBuf len=%d\n", pc->inHead->len));
PPPDEBUG((LOG_INFO, "pppDrop: pbuf len=%d\n", pc->inHead->len));
if (pc->inTail && (pc->inTail != pc->inHead))
pbuf_free(pc->inTail);
pbuf_free(pc->inHead);
pc->inHead = NULL;
pc->inTail = NULL;
@ -1382,26 +1431,33 @@ static void pppInProc(int pd, u_char *s, int l)
else {
/* Trim off the checksum. */
if(pc->inTail->len >= 2) {
pc->inTail->len -= 2;
pc->inLen -= 2;
if(pc->inTail->len >= 2) {
pc->inTail->len -= 2;
/* Update the packet header. */
pc->inHead->tot_len = pc->inLen;
} else {
pc->inHead->tot_len = pc->inLen;
pbuf_realloc(pc->inHead, pc->inLen - 2);
}
pc->inTail->tot_len = pc->inTail->len;
if (pc->inTail != pc->inHead) {
pbuf_chain(pc->inHead, pc->inTail);
pbuf_free(pc->inTail);
}
} else {
pc->inTail->tot_len = pc->inTail->len;
if (pc->inTail != pc->inHead) {
pbuf_chain(pc->inHead, pc->inTail);
pbuf_free(pc->inTail);
}
pbuf_realloc(pc->inHead, pc->inHead->tot_len - 2);
}
/* Dispatch the packet thereby consuming it. */
if(tcpip_callback(pppInput, pc->inHead) != ERR_OK) {
if(tcpip_callback(pppInput, pc->inHead) != ERR_OK) {
PPPDEBUG((LOG_ERR,
"pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pd));
pbuf_free(pc->inHead);
"pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pd));
pbuf_free(pc->inHead);
#ifdef LINK_STATS
lwip_stats.link.drop++;
lwip_stats.link.drop++;
#endif
}
}
pc->inHead = NULL;
pc->inTail = NULL;
}
@ -1480,12 +1536,19 @@ static void pppInProc(int pd, u_char *s, int l)
case PDDATA: /* Process data byte. */
/* Make space to receive processed data. */
if (pc->inTail == NULL || pc->inTail->len == PBUF_POOL_BUFSIZE) {
if(pc->inTail) {
pc->inTail->tot_len = pc->inTail->len;
if (pc->inTail != pc->inHead) {
pbuf_chain(pc->inHead, pc->inTail);
pbuf_free(pc->inTail);
}
}
/* If we haven't started a packet, we need a packet header. */
nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (nextNBuf == NULL) {
/* No free buffers. Drop the input packet and let the
* higher layers deal with it. Continue processing
* the received nBuf chain in case a new packet starts. */
* the received pbuf chain in case a new packet starts. */
PPPDEBUG((LOG_ERR, "pppInProc[%d]: NO FREE MBUFS!\n", pd));
#ifdef LINK_STATS
lwip_stats.link.memerr++;
@ -1493,27 +1556,21 @@ static void pppInProc(int pd, u_char *s, int l)
pppDrop(pc);
pc->inState = PDSTART; /* Wait for flag sequence. */
break;
} else {
if (pc->inHead == NULL) {
struct pppInputHeader *pih = nextNBuf->payload;
pih->unit = pd;
pih->proto = pc->inProtocol;
nextNBuf->len += sizeof(*pih);
pc->inLen = nextNBuf->len;
pc->inHead = nextNBuf;
}
else { /* Since if inHead is not NULL, then neither is inTail! */
pc->inTail->next = nextNBuf;
}
pc->inTail = nextNBuf;
}
if (pc->inHead == NULL) {
struct pppInputHeader *pih = nextNBuf->payload;
pih->unit = pd;
pih->proto = pc->inProtocol;
nextNBuf->len += sizeof(*pih);
pc->inHead = nextNBuf;
}
pc->inTail = nextNBuf;
}
/* Load character into buffer. */
((u_char*)pc->inTail->payload)[pc->inTail->len++] = curChar;
pc->inLen++;
break;
}
@ -1524,74 +1581,4 @@ static void pppInProc(int pd, u_char *s, int l)
avRandomize();
}
/*
* pppMPutC - append given character to end of given nBuf. If the character
* needs to be escaped, do so. If nBuf is full, append another.
* Return the current nBuf.
*/
static struct pbuf *pppMPutC(u_char c, ext_accm *outACCM, struct pbuf *nb)
{
struct pbuf *tb = nb;
/* Make sure there is room for the character and an escape code.
* Sure we don't quite fill the buffer if the character doesn't
* get escaped but is one character worth complicating this? */
/* Note: We assume no packet header. */
if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (tb) {
nb->next = tb;
}
#ifdef LINK_STATS
else {
lwip_stats.link.memerr++;
}
#endif /* LINK_STATS */
nb = tb;
}
if (nb) {
if (ESCAPE_P(*outACCM, c)) {
*((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
*((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
}
else
*((u_char*)nb->payload + nb->len++) = c;
}
return tb;
}
/*
* pppMPutRaw - append given character to end of given nBuf without escaping
* it. If nBuf is full, append another.
* This is normally used to add the flag character to a packet.
* Return the current nBuf.
*/
static struct pbuf *pppMPutRaw(u_char c, struct pbuf *nb)
{
struct pbuf *tb = nb;
/* Make sure there is room for the character and an escape code.
* Sure we don't quite fill the buffer if the character doesn't
* get escaped but is one character worth complicating this? */
/* Note: We assume no packet header. */
if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (tb) {
nb->next = tb;
}
#ifdef LINK_STATS
else {
lwip_stats.link.memerr++;
}
#endif /* LINK_STATS */
nb = tb;
}
if (nb) {
*((u_char*)nb->payload + nb->len++) = c;
}
return tb;
}
#endif /* PPP_SUPPORT */

5
src/netif/ppp/ppp.h
View File

@ -318,6 +318,9 @@ struct ppp_settings {
char remote_name[MAXNAMELEN + 1]; /* Peer's name for authentication */
};
struct ppp_addrs {
struct ip_addr our_ipaddr, his_ipaddr, netmask, dns1, dns2;
};
/*****************************
*** PUBLIC DATA STRUCTURES ***
@ -346,7 +349,7 @@ void pppSetAuth(const char *user, const char *passwd);
* Return a new PPP connection descriptor on success or
* an error code (negative) on failure.
*/
int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *arg, int errCode), void *linkStatusArg);
int pppOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx);
/*
* Close a PPP connection and release the descriptor.

29
src/netif/ppp/vj.c
View File

@ -574,6 +574,33 @@ int vj_uncompress_tcp(
/* Remove the compressed header and prepend the uncompressed header. */
pbuf_header(n0, -vjlen);
if(MEM_ALIGN(n0->payload) != n0->payload) {
struct pbuf *np, *q;
u8_t *bufptr;
np = pbuf_alloc(PBUF_RAW, n0->len + cs->cs_hlen, PBUF_POOL);
if(!np) {
PPPDEBUG((LOG_WARNING, "vj_uncompress_tcp: realign failed\n"));
*nb = NULL;
goto bad;
}
pbuf_header(np, -cs->cs_hlen);
bufptr = n0->payload;
for(q = np; q != NULL; q = q->next) {
memcpy(q->payload, bufptr, q->len);
bufptr += q->len;
}
if(n0->next) {
pbuf_chain(np, n0->next);
pbuf_dechain(n0);
}
pbuf_free(n0);
n0 = np;
}
if(pbuf_header(n0, cs->cs_hlen)) {
struct pbuf *np;
@ -585,8 +612,10 @@ int vj_uncompress_tcp(
goto bad;
}
pbuf_chain(np, n0);
pbuf_free(n0);
n0 = np;
}
LWIP_ASSERT("n0->len >= cs->cs_hlen", n0->len >= cs->cs_hlen);
memcpy(n0->payload, &cs->cs_ip, cs->cs_hlen);
*nb = n0;