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slirp: Make Socket structure IPv6 compatible 

This patch replaces foreign and local address/port couples in Socket
structure by 2 sockaddr_storage which can be casted in sockaddr_in.
Direct access to address and port is still possible thanks to some
\#define, so retrocompatibility of the existing code is assured.

The ss_family field of sockaddr_storage is declared after each socket
creation.

The whole structure is also saved/restored when a Qemu session is
saved/restored.

This prepares for IPv6 support.

Signed-off-by: Guillaume Subiron <maethor@subiron.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Guillaume Subiron 2015-12-19 22:24:58 +01:00 committed by Jason Wang
parent 18137fba35
commit eae303ff23
7 changed files with 78 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
slirp/ip_icmp.c
View File

@ -170,8 +170,10 @@ icmp_input(struct mbuf *m, int hlen)
goto end_error;
}
so->so_m = m;
so->so_ffamily = AF_INET;
so->so_faddr = ip->ip_dst;
so->so_fport = htons(7);
so->so_lfamily = AF_INET;
so->so_laddr = ip->ip_src;
so->so_lport = htons(9);
so->so_iptos = ip->ip_tos;

51
slirp/slirp.c
View File

@ -23,6 +23,7 @@
*/
#include "qemu-common.h"
#include "qemu/timer.h"
#include "qemu/error-report.h"
#include "sysemu/char.h"
#include "slirp.h"
#include "hw/hw.h"
@ -234,7 +235,7 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork,
slirp->opaque = opaque;
register_savevm(NULL, "slirp", 0, 3,
register_savevm(NULL, "slirp", 0, 4,
slirp_state_save, slirp_state_load, slirp);
QTAILQ_INSERT_TAIL(&slirp_instances, slirp, entry);
@ -1046,10 +1047,26 @@ static void slirp_sbuf_save(QEMUFile *f, struct sbuf *sbuf)
static void slirp_socket_save(QEMUFile *f, struct socket *so)
{
qemu_put_be32(f, so->so_urgc);
qemu_put_be32(f, so->so_faddr.s_addr);
qemu_put_be32(f, so->so_laddr.s_addr);
qemu_put_be16(f, so->so_fport);
qemu_put_be16(f, so->so_lport);
qemu_put_be16(f, so->so_ffamily);
switch (so->so_ffamily) {
case AF_INET:
qemu_put_be32(f, so->so_faddr.s_addr);
qemu_put_be16(f, so->so_fport);
break;
default:
error_report(
"so_ffamily unknown, unable to save so_faddr and so_fport\n");
}
qemu_put_be16(f, so->so_lfamily);
switch (so->so_lfamily) {
case AF_INET:
qemu_put_be32(f, so->so_laddr.s_addr);
qemu_put_be16(f, so->so_lport);
break;
default:
error_report(
"so_ffamily unknown, unable to save so_laddr and so_lport\n");
}
qemu_put_byte(f, so->so_iptos);
qemu_put_byte(f, so->so_emu);
qemu_put_byte(f, so->so_type);
@ -1169,10 +1186,26 @@ static int slirp_socket_load(QEMUFile *f, struct socket *so)
return -ENOMEM;
so->so_urgc = qemu_get_be32(f);
so->so_faddr.s_addr = qemu_get_be32(f);
so->so_laddr.s_addr = qemu_get_be32(f);
so->so_fport = qemu_get_be16(f);
so->so_lport = qemu_get_be16(f);
so->so_ffamily = qemu_get_be16(f);
switch (so->so_ffamily) {
case AF_INET:
so->so_faddr.s_addr = qemu_get_be32(f);
so->so_fport = qemu_get_be16(f);
break;
default:
error_report(
"so_ffamily unknown, unable to restore so_faddr and so_lport\n");
}
so->so_lfamily = qemu_get_be16(f);
switch (so->so_lfamily) {
case AF_INET:
so->so_laddr.s_addr = qemu_get_be32(f);
so->so_lport = qemu_get_be16(f);
break;
default:
error_report(
"so_ffamily unknown, unable to restore so_laddr and so_lport\n");
}
so->so_iptos = qemu_get_byte(f);
so->so_emu = qemu_get_byte(f);
so->so_type = qemu_get_byte(f);

14
slirp/socket.c
View File

@ -437,8 +437,8 @@ sowrite(struct socket *so)
void
sorecvfrom(struct socket *so)
{
struct sockaddr_in addr;
socklen_t addrlen = sizeof(struct sockaddr_in);
struct sockaddr_storage addr;
socklen_t addrlen = sizeof(struct sockaddr_storage);
DEBUG_CALL("sorecvfrom");
DEBUG_ARG("so = %p", so);
@ -527,7 +527,13 @@ sorecvfrom(struct socket *so)
* If this packet was destined for CTL_ADDR,
* make it look like that's where it came from, done by udp_output
*/
udp_output(so, m, &addr);
switch (so->so_ffamily) {
case AF_INET:
udp_output(so, m, (struct sockaddr_in *) &addr);
break;
default:
break;
}
} /* rx error */
} /* if ping packet */
}
@ -619,6 +625,7 @@ tcp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
so->so_state &= SS_PERSISTENT_MASK;
so->so_state |= (SS_FACCEPTCONN | flags);
so->so_lfamily = AF_INET;
so->so_lport = lport; /* Kept in network format */
so->so_laddr.s_addr = laddr; /* Ditto */
@ -645,6 +652,7 @@ tcp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
getsockname(s,(struct sockaddr *)&addr,&addrlen);
so->so_ffamily = AF_INET;
so->so_fport = addr.sin_port;
if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
so->so_faddr = slirp->vhost_addr;

19
slirp/socket.h
View File

@ -31,10 +31,21 @@ struct socket {
struct tcpiphdr *so_ti; /* Pointer to the original ti within
* so_mconn, for non-blocking connections */
int so_urgc;
struct in_addr so_faddr; /* foreign host table entry */
struct in_addr so_laddr; /* local host table entry */
uint16_t so_fport; /* foreign port */
uint16_t so_lport; /* local port */
union { /* foreign host */
struct sockaddr_storage ss;
struct sockaddr_in sin;
} fhost;
#define so_faddr fhost.sin.sin_addr
#define so_fport fhost.sin.sin_port
#define so_ffamily fhost.ss.ss_family
union { /* local host */
struct sockaddr_storage ss;
struct sockaddr_in sin;
} lhost;
#define so_laddr lhost.sin.sin_addr
#define so_lport lhost.sin.sin_port
#define so_lfamily lhost.ss.ss_family
uint8_t so_iptos; /* Type of service */
uint8_t so_emu; /* Is the socket emulated? */

2
slirp/tcp_input.c
View File

@ -374,8 +374,10 @@ findso:
sbreserve(&so->so_snd, TCP_SNDSPACE);
sbreserve(&so->so_rcv, TCP_RCVSPACE);
so->so_lfamily = AF_INET;
so->so_laddr = ti->ti_src;
so->so_lport = ti->ti_sport;
so->so_ffamily = AF_INET;
so->so_faddr = ti->ti_dst;
so->so_fport = ti->ti_dport;

2
slirp/tcp_subr.c
View File

@ -413,6 +413,7 @@ void tcp_connect(struct socket *inso)
free(so); /* NOT sofree */
return;
}
so->so_lfamily = AF_INET;
so->so_laddr = inso->so_laddr;
so->so_lport = inso->so_lport;
}
@ -430,6 +431,7 @@ void tcp_connect(struct socket *inso)
qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
socket_set_nodelay(s);
so->so_ffamily = AF_INET;
so->so_fport = addr.sin_port;
so->so_faddr = addr.sin_addr;
/* Translate connections from localhost to the real hostname */

4
slirp/udp.c
View File

@ -190,6 +190,7 @@ udp_input(register struct mbuf *m, int iphlen)
/*
* Setup fields
*/
so->so_lfamily = AF_INET;
so->so_laddr = ip->ip_src;
so->so_lport = uh->uh_sport;
@ -202,6 +203,7 @@ udp_input(register struct mbuf *m, int iphlen)
*/
}
so->so_ffamily = AF_INET;
so->so_faddr = ip->ip_dst; /* XXX */
so->so_fport = uh->uh_dport; /* XXX */
@ -376,6 +378,7 @@ udp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
socket_set_fast_reuse(so->s);
getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
so->so_ffamily = AF_INET;
so->so_fport = addr.sin_port;
if (addr.sin_addr.s_addr == 0 ||
addr.sin_addr.s_addr == loopback_addr.s_addr) {
@ -383,6 +386,7 @@ udp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
} else {
so->so_faddr = addr.sin_addr;
}
so->so_lfamily = AF_INET;
so->so_lport = lport;
so->so_laddr.s_addr = laddr;
if (flags != SS_FACCEPTONCE)