/*
* Try and write() to the socket, whatever doesn't get written
* append to the buffer... for a host with a fast net connection,
* this prevents an unnecessary copy of the data
* (the socket is non-blocking, so we won't hang)
*/
void
sbappend(struct socket *so, struct mbuf *m)
{
int ret = 0;
DEBUG_CALL("sbappend");
DEBUG_ARG("so = %lx", (long)so);
DEBUG_ARG("m = %lx", (long)m);
DEBUG_ARG("m->m_len = %d", m->m_len);
/* Shouldn't happen, but... e.g. foreign host closes connection */
if (m->m_len <= 0) {
m_free(m);
return;
}
/*
* If there is urgent data, call sosendoob
* if not all was sent, sowrite will take care of the rest
* (The rest of this function is just an optimisation)
*/
if (so->so_urgc) {
sbappendsb(&so->so_rcv, m);
m_free(m);
sosendoob(so);
return;
}
/*
* We only write if there's nothing in the buffer,
* ottherwise it'll arrive out of order, and hence corrupt
*/
if (!so->so_rcv.sb_cc)
ret = send(so->s, m->m_data, m->m_len, 0);
if (ret <= 0) {
/*
* Nothing was written
* It's possible that the socket has closed, but
* we don't need to check because if it has closed,
* it will be detected in the normal way by soread()
*/
sbappendsb(&so->so_rcv, m);
} else if (ret != m->m_len) {
/*
* Something was written, but not everything..
* sbappendsb the rest
*/
m->m_len -= ret;
m->m_data += ret;
sbappendsb(&so->so_rcv, m);
} /* else */
/* Whatever happened, we free the mbuf */
m_free(m);
}
/*
* Try and write() to the socket, whatever doesn't get written
* append to the buffer... for a host with a fast net connection,
* this prevents an unnecessary copy of the data
* (the socket is non-blocking, so we won't hang)
*/
void
sbappend(PNATState pData, struct socket *so, struct mbuf *m)
{
int ret = 0;
int mlen = 0;
STAM_PROFILE_START(&pData->StatIOSBAppend_pf, a);
LogFlow(("sbappend: so = %lx, m = %lx, m->m_len = %d\n", (long)so, (long)m, m ? m->m_len : 0));
STAM_COUNTER_INC(&pData->StatIOSBAppend);
/* Shouldn't happen, but... e.g. foreign host closes connection */
mlen = m_length(m, NULL);
if (mlen <= 0)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_zm);
goto done;
}
/*
* If there is urgent data, call sosendoob
* if not all was sent, sowrite will take care of the rest
* (The rest of this function is just an optimisation)
*/
if (so->so_urgc)
{
sbappendsb(pData, &so->so_rcv, m);
m_freem(pData, m);
sosendoob(so);
return;
}
/*
* We only write if there's nothing in the buffer,
* otherwise it'll arrive out of order, and hence corrupt
*/
if (so->so_rcv.sb_cc == 0)
{
caddr_t buf = NULL;
if (m->m_next)
{
buf = RTMemAlloc(mlen);
if (buf == NULL)
{
ret = 0;
goto no_sent;
}
m_copydata(m, 0, mlen, buf);
}
else
buf = mtod(m, char *);
ret = send(so->s, buf, mlen, 0);
if (m->m_next)
RTMemFree(buf);
}
/*
* Try and write() to the socket, whatever doesn't get written
* append to the buffer... for a host with a fast net connection,
* this prevents an unnecessary copy of the data
* (the socket is non-blocking, so we won't hang)
*/
void
sbappend(PNATState pData, struct socket *so, struct mbuf *m)
{
int ret = 0;
int mlen = 0;
caddr_t buf = NULL;
STAM_PROFILE_START(&pData->StatIOSBAppend_pf, a);
LogFlow(("sbappend: so = %lx, m = %lx, m->m_len = %d\n", (long)so, (long)m, m ? m->m_len : 0));
STAM_COUNTER_INC(&pData->StatIOSBAppend);
/* Shouldn't happen, but... e.g. foreign host closes connection */
mlen = m_length(m, NULL);
if (mlen <= 0)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_zm);
goto done;
}
/*
* If there is urgent data, call sosendoob
* if not all was sent, sowrite will take care of the rest
* (The rest of this function is just an optimisation)
*/
if (so->so_urgc)
{
sbappendsb(pData, &so->so_rcv, m);
m_freem(pData, m);
sosendoob(so);
return;
}
/*
* We only write if there's nothing in the buffer,
* ottherwise it'll arrive out of order, and hence corrupt
*/
if (m->m_next)
{
buf = RTMemAlloc(mlen);
if (buf == NULL)
{
ret = 0;
goto no_sent;
}
m_copydata(m, 0, mlen, buf);
}
else
buf = mtod(m, char *);
if(!so->so_rcv.sb_cc)
ret = send(so->s, buf, mlen, 0);
if (m->m_next)
RTMemFree(buf);
no_sent:
if (ret <= 0)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_wf);
/*
* Nothing was written
* It's possible that the socket has closed, but
* we don't need to check because if it has closed,
* it will be detected in the normal way by soread()
*/
sbappendsb(pData, &so->so_rcv, m);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wf, a);
goto done;
}
else if (ret != mlen)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_wp);
/*
* Something was written, but not everything..
* sbappendsb the rest
*/
m_adj(m, ret);
sbappendsb(pData, &so->so_rcv, m);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wp, a);
goto done;
} /* else */
/* Whatever happened, we free the mbuf */
STAM_COUNTER_INC(&pData->StatIOSBAppend_wa);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wa, a);
done:
m_freem(pData, m);
}