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slirp updates

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Merge remote-tracking branch 'remotes/thibault/tags/samuel-thibault' into staging

slirp updates

# gpg: Signature made Tue 29 Mar 2016 00:16:05 BST using RSA key ID FB6B2F1D
# gpg: Good signature from "Samuel Thibault <samuel.thibault@gnu.org>"
# gpg:                 aka "Samuel Thibault <sthibault@debian.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: 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: F632 74CD C630 0873 CB3D  29D9 E3E5 1CE8 FB6B 2F1D

* remotes/thibault/tags/samuel-thibault:
  Rework ipv6 options
  Use C99 flexible array instead of 1-byte trailing array
  Avoid embedding struct mbuf in other structures
  slirp: send icmp6 errors when UDP send failed
  slirp: Fix memory leak on small incoming ipv4 packet

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-03-29 18:25:27 +01:00
commit 5b8e6b4cc2
11 changed files with 67 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/slirp.c
View File

@ -829,10 +829,10 @@ int net_init_slirp(const NetClientOptions *opts, const char *name,
net_init_slirp_configs(user->guestfwd, 0);
ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet,
user->host, user->ip6_prefix, user->ip6_prefixlen,
user->ip6_host, user->hostname, user->tftp,
user->host, user->ipv6_prefix, user->ipv6_prefixlen,
user->ipv6_host, user->hostname, user->tftp,
user->bootfile, user->dhcpstart,
user->dns, user->ip6_dns, user->smb,
user->dns, user->ipv6_dns, user->smb,
user->smbserver, dnssearch);
while (slirp_configs) {

25
qapi-schema.json
View File

@ -2427,7 +2427,10 @@
#
# @ip: #optional legacy parameter, use net= instead
#
# @net: #optional IP address and optional netmask
# @net: #optional IP network address that the guest will see, in the
# form addr[/netmask] The netmask is optional, and can be
# either in the form a.b.c.d or as a number of valid top-most
# bits. Default is 10.0.2.0/24.
#
# @host: #optional guest-visible address of the host
#
@ -2443,13 +2446,17 @@
# @dnssearch: #optional list of DNS suffixes to search, passed as DHCP option
# to the guest
#
# @ip6-prefix: #optional IPv6 network prefix (default is fec0::) (since 2.6)
# @ipv6-prefix: #optional IPv6 network prefix (default is fec0::) (since
# 2.6). The network prefix is given in the usual
# hexadecimal IPv6 address notation.
#
# @ip6-prefixlen: #optional IPv6 network prefix length (default is 64) (since 2.6)
# @ipv6-prefixlen: #optional IPv6 network prefix length (default is 64)
# (since 2.6)
#
# @ip6-host: #optional guest-visible IPv6 address of the host (since 2.6)
# @ipv6-host: #optional guest-visible IPv6 address of the host (since 2.6)
#
# @ip6-dns: #optional guest-visible IPv6 address of the virtual nameserver (since 2.6)
# @ipv6-dns: #optional guest-visible IPv6 address of the virtual
# nameserver (since 2.6)
#
# @smb: #optional root directory of the built-in SMB server
#
@ -2474,10 +2481,10 @@
'*dhcpstart': 'str',
'*dns': 'str',
'*dnssearch': ['String'],
'*ip6-prefix': 'str',
'*ip6-prefixlen': 'int',
'*ip6-host': 'str',
'*ip6-dns': 'str',
'*ipv6-prefix': 'str',
'*ipv6-prefixlen': 'int',
'*ipv6-host': 'str',
'*ipv6-dns': 'str',
'*smb': 'str',
'*smbserver': 'str',
'*hostfwd': ['String'],

18
qemu-options.hx
View File

@ -1551,9 +1551,9 @@ DEF("smb", HAS_ARG, QEMU_OPTION_smb, "", QEMU_ARCH_ALL)
DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
#ifdef CONFIG_SLIRP
"-netdev user,id=str[,net=addr[/mask]][,host=addr][,ip6-net=addr[/int]]\n"
" [,ip6-host=addr][,restrict=on|off][,hostname=host][,dhcpstart=addr]\n"
" [,dns=addr][,ip6-dns=addr][,dnssearch=domain][,tftp=dir]\n"
"-netdev user,id=str[,net=addr[/mask]][,host=addr][,ipv6-net=addr[/int]]\n"
" [,ipv6-host=addr][,restrict=on|off][,hostname=host][,dhcpstart=addr]\n"
" [,dns=addr][,ipv6-dns=addr][,dnssearch=domain][,tftp=dir]\n"
" [,bootfile=f][,hostfwd=rule][,guestfwd=rule]"
#ifndef _WIN32
"[,smb=dir[,smbserver=addr]]\n"
@ -1710,11 +1710,13 @@ either in the form a.b.c.d or as number of valid top-most bits. Default is
Specify the guest-visible address of the host. Default is the 2nd IP in the
guest network, i.e. x.x.x.2.
@item ip6-net=@var{addr}[/@var{int}]
Set IPv6 network address the guest will see. Optionally specify the prefix
size, as number of valid top-most bits. Default is fec0::/64.
@item ipv6-net=@var{addr}[/@var{int}]
Set IPv6 network address the guest will see (default is fec0::/64). The
network prefix is given in the usual hexadecimal IPv6 address
notation. The prefix size is optional, and is given as the number of
valid top-most bits (default is 64).
@item ip6-host=@var{addr}
@item ipv6-host=@var{addr}
Specify the guest-visible IPv6 address of the host. Default is the 2nd IPv6 in
the guest network, i.e. xxxx::2.
@ -1735,7 +1737,7 @@ Specify the guest-visible address of the virtual nameserver. The address must
be different from the host address. Default is the 3rd IP in the guest network,
i.e. x.x.x.3.
@item ip6-dns=@var{addr}
@item ipv6-dns=@var{addr}
Specify the guest-visible address of the IPv6 virtual nameserver. The address
must be different from the host address. Default is the 3rd IP in the guest
network, i.e. xxxx::3.

27
slirp/if.c
View File

@ -28,9 +28,9 @@ ifs_remque(struct mbuf *ifm)
void
if_init(Slirp *slirp)
{
slirp->if_fastq.ifq_next = slirp->if_fastq.ifq_prev = &slirp->if_fastq;
slirp->if_batchq.ifq_next = slirp->if_batchq.ifq_prev = &slirp->if_batchq;
slirp->next_m = &slirp->if_batchq;
slirp->if_fastq.qh_link = slirp->if_fastq.qh_rlink = &slirp->if_fastq;
slirp->if_batchq.qh_link = slirp->if_batchq.qh_rlink = &slirp->if_batchq;
slirp->next_m = (struct mbuf *) &slirp->if_batchq;
}
/*
@ -74,7 +74,8 @@ if_output(struct socket *so, struct mbuf *ifm)
* We mustn't put this packet back on the fastq (or we'll send it out of order)
* XXX add cache here?
*/
for (ifq = slirp->if_batchq.ifq_prev; ifq != &slirp->if_batchq;
for (ifq = (struct mbuf *) slirp->if_batchq.qh_rlink;
(struct quehead *) ifq != &slirp->if_batchq;
ifq = ifq->ifq_prev) {
if (so == ifq->ifq_so) {
/* A match! */
@ -86,7 +87,7 @@ if_output(struct socket *so, struct mbuf *ifm)
/* No match, check which queue to put it on */
if (so && (so->so_iptos & IPTOS_LOWDELAY)) {
ifq = slirp->if_fastq.ifq_prev;
ifq = (struct mbuf *) slirp->if_fastq.qh_rlink;
on_fastq = 1;
/*
* Check if this packet is a part of the last
@ -98,9 +99,9 @@ if_output(struct socket *so, struct mbuf *ifm)
goto diddit;
}
} else {
ifq = slirp->if_batchq.ifq_prev;
ifq = (struct mbuf *) slirp->if_batchq.qh_rlink;
/* Set next_m if the queue was empty so far */
if (slirp->next_m == &slirp->if_batchq) {
if ((struct quehead *) slirp->next_m == &slirp->if_batchq) {
slirp->next_m = ifm;
}
}
@ -166,10 +167,10 @@ void if_start(Slirp *slirp)
}
slirp->if_start_busy = true;
if (slirp->if_fastq.ifq_next != &slirp->if_fastq) {
ifm_next = slirp->if_fastq.ifq_next;
if (slirp->if_fastq.qh_link != &slirp->if_fastq) {
ifm_next = (struct mbuf *) slirp->if_fastq.qh_link;
next_from_batchq = false;
} else if (slirp->next_m != &slirp->if_batchq) {
} else if ((struct quehead *) slirp->next_m != &slirp->if_batchq) {
/* Nothing on fastq, pick up from batchq via next_m */
ifm_next = slirp->next_m;
next_from_batchq = true;
@ -182,12 +183,12 @@ void if_start(Slirp *slirp)
from_batchq = next_from_batchq;
ifm_next = ifm->ifq_next;
if (ifm_next == &slirp->if_fastq) {
if ((struct quehead *) ifm_next == &slirp->if_fastq) {
/* No more packets in fastq, switch to batchq */
ifm_next = slirp->next_m;
next_from_batchq = true;
}
if (ifm_next == &slirp->if_batchq) {
if ((struct quehead *) ifm_next == &slirp->if_batchq) {
/* end of batchq */
ifm_next = NULL;
}
@ -218,7 +219,7 @@ void if_start(Slirp *slirp)
/* Next packet in fastq is from the same session */
ifm_next = next;
next_from_batchq = false;
} else if (slirp->next_m == &slirp->if_batchq) {
} else if ((struct quehead *) slirp->next_m == &slirp->if_batchq) {
/* Set next_m and ifm_next if the session packet is now the
* only one on batchq */
slirp->next_m = ifm_next = next;

2
slirp/ip_input.c
View File

@ -85,7 +85,7 @@ ip_input(struct mbuf *m)
DEBUG_ARG("m_len = %d", m->m_len);
if (m->m_len < sizeof (struct ip)) {
return;
goto bad;
}
ip = mtod(m, struct ip *);

19
slirp/mbuf.c
View File

@ -29,16 +29,16 @@
void
m_init(Slirp *slirp)
{
slirp->m_freelist.m_next = slirp->m_freelist.m_prev = &slirp->m_freelist;
slirp->m_usedlist.m_next = slirp->m_usedlist.m_prev = &slirp->m_usedlist;
slirp->m_freelist.qh_link = slirp->m_freelist.qh_rlink = &slirp->m_freelist;
slirp->m_usedlist.qh_link = slirp->m_usedlist.qh_rlink = &slirp->m_usedlist;
}
void m_cleanup(Slirp *slirp)
{
struct mbuf *m, *next;
m = slirp->m_usedlist.m_next;
while (m != &slirp->m_usedlist) {
m = (struct mbuf *) slirp->m_usedlist.qh_link;
while ((struct quehead *) m != &slirp->m_usedlist) {
next = m->m_next;
if (m->m_flags & M_EXT) {
free(m->m_ext);
@ -46,8 +46,8 @@ void m_cleanup(Slirp *slirp)
free(m);
m = next;
}
m = slirp->m_freelist.m_next;
while (m != &slirp->m_freelist) {
m = (struct mbuf *) slirp->m_freelist.qh_link;
while ((struct quehead *) m != &slirp->m_freelist) {
next = m->m_next;
free(m);
m = next;
@ -70,7 +70,7 @@ m_get(Slirp *slirp)
DEBUG_CALL("m_get");
if (slirp->m_freelist.m_next == &slirp->m_freelist) {
if (slirp->m_freelist.qh_link == &slirp->m_freelist) {
m = (struct mbuf *)malloc(SLIRP_MSIZE);
if (m == NULL) goto end_error;
slirp->mbuf_alloced++;
@ -78,7 +78,7 @@ m_get(Slirp *slirp)
flags = M_DOFREE;
m->slirp = slirp;
} else {
m = slirp->m_freelist.m_next;
m = (struct mbuf *) slirp->m_freelist.qh_link;
remque(m);
}
@ -225,7 +225,8 @@ dtom(Slirp *slirp, void *dat)
DEBUG_ARG("dat = %p", dat);
/* bug corrected for M_EXT buffers */
for (m = slirp->m_usedlist.m_next; m != &slirp->m_usedlist;
for (m = (struct mbuf *) slirp->m_usedlist.qh_link;
(struct quehead *) m != &slirp->m_usedlist;
m = m->m_next) {
if (m->m_flags & M_EXT) {
if( (char *)dat>=m->m_ext && (char *)dat<(m->m_ext + m->m_size) )

6
slirp/mbuf.h
View File

@ -81,11 +81,9 @@ struct mbuf {
Slirp *slirp;
bool resolution_requested;
uint64_t expiration_date;
char *m_ext;
/* start of dynamic buffer area, must be last element */
union {
char m_dat[1]; /* ANSI don't like 0 sized arrays */
char *m_ext;
};
char m_dat[];
};
#define ifq_prev m_prev

5
slirp/misc.c
View File

@ -17,11 +17,6 @@
int slirp_debug = DBG_CALL|DBG_MISC|DBG_ERROR;
#endif
struct quehead {
struct quehead *qh_link;
struct quehead *qh_rlink;
};
inline void
insque(void *a, void *b)
{

5
slirp/misc.h
View File

@ -45,6 +45,11 @@ struct emu_t {
struct emu_t *next;
};
struct slirp_quehead {
struct slirp_quehead *qh_link;
struct slirp_quehead *qh_rlink;
};
void slirp_insque(void *, void *);
void slirp_remque(void *);
int add_exec(struct ex_list **, int, char *, struct in_addr, int);

8
slirp/slirp.h
View File

@ -82,6 +82,7 @@ void free(void *ptr);
have different prototypes. */
#define insque slirp_insque
#define remque slirp_remque
#define quehead slirp_quehead
#ifdef HAVE_SYS_STROPTS_H
#include <sys/stropts.h>
@ -197,12 +198,13 @@ struct Slirp {
struct ex_list *exec_list;
/* mbuf states */
struct mbuf m_freelist, m_usedlist;
struct quehead m_freelist;
struct quehead m_usedlist;
int mbuf_alloced;
/* if states */
struct mbuf if_fastq; /* fast queue (for interactive data) */
struct mbuf if_batchq; /* queue for non-interactive data */
struct quehead if_fastq; /* fast queue (for interactive data) */
struct quehead if_batchq; /* queue for non-interactive data */
struct mbuf *next_m; /* pointer to next mbuf to output */
bool if_start_busy; /* avoid if_start recursion */

3
slirp/udp6.c
View File

@ -113,8 +113,7 @@ void udp6_input(struct mbuf *m)
m->m_data -= iphlen;
*ip = save_ip;
DEBUG_MISC((dfd, "udp tx errno = %d-%s\n", errno, strerror(errno)));
/* TODO: ICMPv6 error */
/*icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));*/
icmp6_send_error(m, ICMP6_UNREACH, ICMP6_UNREACH_NO_ROUTE);
goto bad;
}