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-rw-r--r--slirp/sbuf.c188
1 files changed, 0 insertions, 188 deletions
diff --git a/slirp/sbuf.c b/slirp/sbuf.c
deleted file mode 100644
index 51a9f0c..0000000
--- a/slirp/sbuf.c
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * Copyright (c) 1995 Danny Gasparovski.
- *
- * Please read the file COPYRIGHT for the
- * terms and conditions of the copyright.
- */
-
-#include "slirp.h"
-
-static void sbappendsb(struct sbuf *sb, struct mbuf *m);
-
-void
-sbfree(struct sbuf *sb)
-{
- free(sb->sb_data);
-}
-
-bool
-sbdrop(struct sbuf *sb, int num)
-{
- int limit = sb->sb_datalen / 2;
-
- /*
- * We can only drop how much we have
- * This should never succeed
- */
- if(num > sb->sb_cc)
- num = sb->sb_cc;
- sb->sb_cc -= num;
- sb->sb_rptr += num;
- if(sb->sb_rptr >= sb->sb_data + sb->sb_datalen)
- sb->sb_rptr -= sb->sb_datalen;
-
- if (sb->sb_cc < limit && sb->sb_cc + num >= limit) {
- return true;
- }
-
- return false;
-}
-
-void
-sbreserve(struct sbuf *sb, int size)
-{
- if (sb->sb_data) {
- /* Already alloced, realloc if necessary */
- if (sb->sb_datalen != size) {
- sb->sb_wptr = sb->sb_rptr = sb->sb_data = (char *)realloc(sb->sb_data, size);
- sb->sb_cc = 0;
- if (sb->sb_wptr)
- sb->sb_datalen = size;
- else
- sb->sb_datalen = 0;
- }
- } else {
- sb->sb_wptr = sb->sb_rptr = sb->sb_data = (char *)malloc(size);
- sb->sb_cc = 0;
- if (sb->sb_wptr)
- sb->sb_datalen = size;
- else
- sb->sb_datalen = 0;
- }
-}
-
-/*
- * 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 = %p", so);
- DEBUG_ARG("m = %p", 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);
- (void)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 = slirp_send(so, 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);
-}
-
-/*
- * Copy the data from m into sb
- * The caller is responsible to make sure there's enough room
- */
-static void
-sbappendsb(struct sbuf *sb, struct mbuf *m)
-{
- int len, n, nn;
-
- len = m->m_len;
-
- if (sb->sb_wptr < sb->sb_rptr) {
- n = sb->sb_rptr - sb->sb_wptr;
- if (n > len) n = len;
- memcpy(sb->sb_wptr, m->m_data, n);
- } else {
- /* Do the right edge first */
- n = sb->sb_data + sb->sb_datalen - sb->sb_wptr;
- if (n > len) n = len;
- memcpy(sb->sb_wptr, m->m_data, n);
- len -= n;
- if (len) {
- /* Now the left edge */
- nn = sb->sb_rptr - sb->sb_data;
- if (nn > len) nn = len;
- memcpy(sb->sb_data,m->m_data+n,nn);
- n += nn;
- }
- }
-
- sb->sb_cc += n;
- sb->sb_wptr += n;
- if (sb->sb_wptr >= sb->sb_data + sb->sb_datalen)
- sb->sb_wptr -= sb->sb_datalen;
-}
-
-/*
- * Copy data from sbuf to a normal, straight buffer
- * Don't update the sbuf rptr, this will be
- * done in sbdrop when the data is acked
- */
-void
-sbcopy(struct sbuf *sb, int off, int len, char *to)
-{
- char *from;
-
- from = sb->sb_rptr + off;
- if (from >= sb->sb_data + sb->sb_datalen)
- from -= sb->sb_datalen;
-
- if (from < sb->sb_wptr) {
- if (len > sb->sb_cc) len = sb->sb_cc;
- memcpy(to,from,len);
- } else {
- /* re-use off */
- off = (sb->sb_data + sb->sb_datalen) - from;
- if (off > len) off = len;
- memcpy(to,from,off);
- len -= off;
- if (len)
- memcpy(to+off,sb->sb_data,len);
- }
-}