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slirp updates 

Andrew Oates (1):
   slirp: fix ICMP handling on macOS hosts
 
 Gavin Grant (1):
   slirp: Propagate host TCP RST packet to the guest after socket
     disconnected
 
 Peter Maydell (1):
   slirp: document mbuf pointers and sizes
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Merge remote-tracking branch 'remotes/thibault/tags/samuel-thibault' into staging

slirp updates

Andrew Oates (1):
  slirp: fix ICMP handling on macOS hosts

Gavin Grant (1):
  slirp: Propagate host TCP RST packet to the guest after socket
    disconnected

Peter Maydell (1):
  slirp: document mbuf pointers and sizes

# gpg: Signature made Sun 07 Oct 2018 19:04:13 BST
# gpg:                using RSA key E3F65A9E9560DB4C
# gpg: Good signature from "Samuel Thibault <samuel.thibault@aquilenet.fr>"
# gpg:                 aka "Samuel Thibault <sthibault@debian.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@gnu.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@inria.fr>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@labri.fr>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@ens-lyon.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@u-bordeaux.fr>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 900C B024 B679 31D4 0F82  304B D017 8C76 7D06 9EE6
#      Subkey fingerprint: 33FA 7B64 6195 01F8 CE9C  8F97 E3F6 5A9E 9560 DB4C

* remotes/thibault/tags/samuel-thibault:
  slirp: Propagate host TCP RST packet to the guest after socket disconnected
  slirp: fix ICMP handling on macOS hosts
  slirp: document mbuf pointers and sizes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-10-08 11:20:17 +01:00
parent df51a00519 93a972f854
commit bb94c11985
4 changed files with 56 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
slirp/ip_icmp.c
View File

@ -420,7 +420,32 @@ void icmp_receive(struct socket *so)
icp = mtod(m, struct icmp *);
id = icp->icmp_id;
len = qemu_recv(so->s, icp, m->m_len, 0);
len = qemu_recv(so->s, icp, M_ROOM(m), 0);
/*
* The behavior of reading SOCK_DGRAM+IPPROTO_ICMP sockets is inconsistent
* between host OSes. On Linux, only the ICMP header and payload is
* included. On macOS/Darwin, the socket acts like a raw socket and
* includes the IP header as well. On other BSDs, SOCK_DGRAM+IPPROTO_ICMP
* sockets aren't supported at all, so we treat them like raw sockets. It
* isn't possible to detect this difference at runtime, so we must use an
* #ifdef to determine if we need to remove the IP header.
*/
#ifdef CONFIG_BSD
if (len >= sizeof(struct ip)) {
struct ip *inner_ip = mtod(m, struct ip *);
int inner_hlen = inner_ip->ip_hl << 2;
if (inner_hlen > len) {
len = -1;
errno = -EINVAL;
} else {
len -= inner_hlen;
memmove(icp, (unsigned char *)icp + inner_hlen, len);
}
} else {
len = -1;
errno = -EINVAL;
}
#endif
icp->icmp_id = id;
m->m_data -= hlen;

14
slirp/mbuf.c
View File

@ -151,7 +151,7 @@ m_cat(struct mbuf *m, struct mbuf *n)
void
m_inc(struct mbuf *m, int size)
{
int datasize;
int gapsize;
/* some compilers throw up on gotos. This one we can fake. */
if (M_ROOM(m) > size) {
@ -159,17 +159,17 @@ m_inc(struct mbuf *m, int size)
}
if (m->m_flags & M_EXT) {
datasize = m->m_data - m->m_ext;
m->m_ext = g_realloc(m->m_ext, size + datasize);
gapsize = m->m_data - m->m_ext;
m->m_ext = g_realloc(m->m_ext, size + gapsize);
} else {
datasize = m->m_data - m->m_dat;
m->m_ext = g_malloc(size + datasize);
gapsize = m->m_data - m->m_dat;
m->m_ext = g_malloc(size + gapsize);
memcpy(m->m_ext, m->m_dat, m->m_size);
m->m_flags |= M_EXT;
}
m->m_data = m->m_ext + datasize;
m->m_size = size + datasize;
m->m_data = m->m_ext + gapsize;
m->m_size = size + gapsize;
}

13
slirp/mbuf.h
View File

@ -47,6 +47,19 @@
* free the m_ext. This is inefficient memory-wise, but who cares.
*/
/*
* mbufs allow to have a gap between the start of the allocated buffer (m_ext if
* M_EXT is set, m_dat otherwise) and the in-use data:
*
* |--gapsize----->|---m_len------->
* |----------m_size------------------------------>
* |----M_ROOM-------------------->
* |-M_FREEROOM-->
*
* ^ ^ ^
* m_dat/m_ext m_data end of buffer
*/
/*
* How much room is in the mbuf, from m_data to the end of the mbuf
*/

13
slirp/socket.c
View File

@ -204,12 +204,19 @@ soread(struct socket *so)
return 0;
else {
int err;
socklen_t slen = sizeof err;
socklen_t elen = sizeof err;
struct sockaddr_storage addr;
struct sockaddr *paddr = (struct sockaddr *) &addr;
socklen_t alen = sizeof addr;
err = errno;
if (nn == 0) {
getsockopt(so->s, SOL_SOCKET, SO_ERROR,
&err, &slen);
if (getpeername(so->s, paddr, &alen) < 0) {
err = errno;
} else {
getsockopt(so->s, SOL_SOCKET, SO_ERROR,
&err, &elen);
}
}
DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));