From: Samuel Thibault <samuel.thibault@ens-lyon.org>
To: qemu-devel@nongnu.org
Cc: Thomas Huth <thuth@redhat.com>,
zhanghailiang <zhang.zhanghailiang@huawei.com>,
Li Zhijian <lizhijian@cn.fujitsu.com>,
Stefan Hajnoczi <stefanha@gmail.com>,
Jason Wang <jasowang@redhat.com>,
Dave Gilbert <dgilbert@redhat.com>,
Vasiliy Tolstov <v.tolstov@selfip.ru>,
Huangpeng <peter.huangpeng@huawei.com>,
Gonglei <arei.gonglei@huawei.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
Samuel Thibault <samuel.thibault@ens-lyon.org>,
Yang Hongyang <yanghy@cn.fujitsu.com>,
Guillaume Subiron <maethor@subiron.org>
Subject: [Qemu-devel] [PATCHv7 5/9] slirp: Generalizing and neutralizing various TCP functions before adding IPv6 stuff
Date: Mon, 8 Feb 2016 11:28:54 +0100 [thread overview]
Message-ID: <145e7741b4d6eeac3d69ea9cf40110229167db0c.1454927009.git.samuel.thibault@ens-lyon.org> (raw)
In-Reply-To: <cover.1454927009.git.samuel.thibault@ens-lyon.org>
In-Reply-To: <cover.1454927009.git.samuel.thibault@ens-lyon.org>
From: Guillaume Subiron <maethor@subiron.org>
Basically, this patch adds some switch in various TCP functions to
prepare them for the IPv6 case.
To have something to "switch" in tcp_input() and tcp_respond(), a new
argument is used to give them the sa_family of the addresses they are
working on.
This patch does not include the entailed reindentation, to make proofread
easier. Reindentation is adressed in the following no-op patch.
Signed-off-by: Guillaume Subiron <maethor@subiron.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
slirp/ip_input.c | 2 +-
slirp/slirp.c | 6 ++++--
slirp/slirp.h | 5 +++--
slirp/tcp_input.c | 52 ++++++++++++++++++++++++++++++++++++++++++++--------
slirp/tcp_output.c | 14 +++++++++++---
slirp/tcp_subr.c | 37 +++++++++++++++++++++++++++++--------
slirp/tcp_timer.c | 3 ++-
7 files changed, 94 insertions(+), 25 deletions(-)
diff --git a/slirp/ip_input.c b/slirp/ip_input.c
index 16fb2cb..12f173d 100644
--- a/slirp/ip_input.c
+++ b/slirp/ip_input.c
@@ -200,7 +200,7 @@ ip_input(struct mbuf *m)
*/
switch (ip->ip_p) {
case IPPROTO_TCP:
- tcp_input(m, hlen, (struct socket *)NULL);
+ tcp_input(m, hlen, (struct socket *)NULL, AF_INET);
break;
case IPPROTO_UDP:
udp_input(m, hlen);
diff --git a/slirp/slirp.c b/slirp/slirp.c
index 551f100..cca5a80 100644
--- a/slirp/slirp.c
+++ b/slirp/slirp.c
@@ -573,7 +573,8 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error)
/*
* Continue tcp_input
*/
- tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
/* continue; */
} else {
ret = sowrite(so);
@@ -622,7 +623,8 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error)
}
}
- tcp_input((struct mbuf *)NULL, sizeof(struct ip), so);
+ tcp_input((struct mbuf *)NULL, sizeof(struct ip), so,
+ so->so_ffamily);
} /* SS_ISFCONNECTING */
#endif
}
diff --git a/slirp/slirp.h b/slirp/slirp.h
index 1772222..3261815 100644
--- a/slirp/slirp.h
+++ b/slirp/slirp.h
@@ -346,7 +346,7 @@ void ip6_input(struct mbuf *);
int ip6_output(struct socket *, struct mbuf *, int fast);
/* tcp_input.c */
-void tcp_input(register struct mbuf *, int, struct socket *);
+void tcp_input(register struct mbuf *, int, struct socket *, unsigned short af);
int tcp_mss(register struct tcpcb *, u_int);
/* tcp_output.c */
@@ -357,7 +357,8 @@ void tcp_setpersist(register struct tcpcb *);
void tcp_init(Slirp *);
void tcp_cleanup(Slirp *);
void tcp_template(struct tcpcb *);
-void tcp_respond(struct tcpcb *, register struct tcpiphdr *, register struct mbuf *, tcp_seq, tcp_seq, int);
+void tcp_respond(struct tcpcb *, register struct tcpiphdr *,
+ register struct mbuf *, tcp_seq, tcp_seq, int, unsigned short);
struct tcpcb * tcp_newtcpcb(struct socket *);
struct tcpcb * tcp_close(register struct tcpcb *);
void tcp_sockclosed(struct tcpcb *);
diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index 26b0c8b..0cc279b 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -214,7 +214,7 @@ present:
* protocol specification dated September, 1981 very closely.
*/
void
-tcp_input(struct mbuf *m, int iphlen, struct socket *inso)
+tcp_input(struct mbuf *m, int iphlen, struct socket *inso, unsigned short af)
{
struct ip save_ip, *ip;
register struct tcpiphdr *ti;
@@ -256,6 +256,8 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso)
}
slirp = m->slirp;
+ switch (af) {
+ case AF_INET:
if (iphlen > sizeof(struct ip )) {
ip_stripoptions(m, (struct mbuf *)0);
iphlen=sizeof(struct ip );
@@ -297,6 +299,11 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso)
if(cksum(m, len)) {
goto drop;
}
+ break;
+
+ default:
+ goto drop;
+ }
/*
* Check that TCP offset makes sense,
@@ -332,14 +339,20 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso)
* Locate pcb for segment.
*/
findso:
- lhost.ss_family = AF_INET;
+ lhost.ss_family = af;
+ fhost.ss_family = af;
+ switch (af) {
+ case AF_INET:
lhost4 = (struct sockaddr_in *) &lhost;
lhost4->sin_addr = ti->ti_src;
lhost4->sin_port = ti->ti_sport;
- fhost.ss_family = AF_INET;
fhost4 = (struct sockaddr_in *) &fhost;
fhost4->sin_addr = ti->ti_dst;
fhost4->sin_port = ti->ti_dport;
+ break;
+ default:
+ goto drop;
+ }
so = solookup(&slirp->tcp_last_so, &slirp->tcb, &lhost, &fhost);
@@ -389,8 +402,17 @@ findso:
so->lhost.ss = lhost;
so->fhost.ss = fhost;
- if ((so->so_iptos = tcp_tos(so)) == 0)
+ so->so_iptos = tcp_tos(so);
+ if (so->so_iptos == 0) {
+ switch (af) {
+ case AF_INET:
so->so_iptos = ((struct ip *)ti)->ip_tos;
+ break;
+ default:
+ goto drop;
+ break;
+ }
+ }
tp = sototcpcb(so);
tp->t_state = TCPS_LISTEN;
@@ -569,7 +591,8 @@ findso:
* If this is destined for the control address, then flag to
* tcp_ctl once connected, otherwise connect
*/
- if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
+ if (af == AF_INET &&
+ (so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
slirp->vnetwork_addr.s_addr) {
if (so->so_faddr.s_addr != slirp->vhost_addr.s_addr &&
so->so_faddr.s_addr != slirp->vnameserver_addr.s_addr) {
@@ -607,7 +630,7 @@ findso:
if(errno == ECONNREFUSED) {
/* ACK the SYN, send RST to refuse the connection */
tcp_respond(tp, ti, m, ti->ti_seq+1, (tcp_seq)0,
- TH_RST|TH_ACK);
+ TH_RST|TH_ACK, af);
} else {
if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
HTONL(ti->ti_seq); /* restore tcp header */
@@ -616,7 +639,13 @@ findso:
HTONS(ti->ti_urp);
m->m_data -= sizeof(struct tcpiphdr)+off-sizeof(struct tcphdr);
m->m_len += sizeof(struct tcpiphdr)+off-sizeof(struct tcphdr);
+ switch (af) {
+ case AF_INET:
*ip=save_ip;
+ break;
+ default:
+ goto drop;
+ }
icmp_send_error(m, ICMP_UNREACH, code, 0, strerror(errno));
}
tcp_close(tp);
@@ -1289,11 +1318,11 @@ dropafterack:
dropwithreset:
/* reuses m if m!=NULL, m_free() unnecessary */
if (tiflags & TH_ACK)
- tcp_respond(tp, ti, m, (tcp_seq)0, ti->ti_ack, TH_RST);
+ tcp_respond(tp, ti, m, (tcp_seq)0, ti->ti_ack, TH_RST, af);
else {
if (tiflags & TH_SYN) ti->ti_len++;
tcp_respond(tp, ti, m, ti->ti_seq+ti->ti_len, (tcp_seq)0,
- TH_RST|TH_ACK);
+ TH_RST|TH_ACK, af);
}
return;
@@ -1484,7 +1513,14 @@ tcp_mss(struct tcpcb *tp, u_int offer)
DEBUG_ARG("tp = %p", tp);
DEBUG_ARG("offer = %d", offer);
+ switch (so->so_ffamily) {
+ case AF_INET:
mss = min(IF_MTU, IF_MRU) - sizeof(struct tcphdr) + sizeof(struct ip);
+ break;
+ default:
+ break;
+ }
+
if (offer)
mss = min(mss, offer);
mss = max(mss, 32);
diff --git a/slirp/tcp_output.c b/slirp/tcp_output.c
index 7fc6a87..62ab1e5 100644
--- a/slirp/tcp_output.c
+++ b/slirp/tcp_output.c
@@ -61,7 +61,8 @@ tcp_output(struct tcpcb *tp)
register long len, win;
int off, flags, error;
register struct mbuf *m;
- register struct tcpiphdr *ti;
+ register struct tcpiphdr *ti, tcpiph_save;
+ struct ip *ip;
u_char opt[MAX_TCPOPTLEN];
unsigned optlen, hdrlen;
int idle, sendalot;
@@ -447,13 +448,15 @@ send:
* the template, but need a way to checksum without them.
*/
m->m_len = hdrlen + len; /* XXX Needed? m_len should be correct */
+ tcpiph_save = *(mtod(m, struct tcpiphdr *));
- struct tcpiphdr tcpiph_save = *(mtod(m, struct tcpiphdr *));
+ switch (so->so_ffamily) {
+ case AF_INET:
m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr)
- sizeof(struct ip);
m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr)
- sizeof(struct ip);
- struct ip *ip = mtod(m, struct ip *);
+ ip = mtod(m, struct ip *);
ip->ip_len = m->m_len;
ip->ip_dst = tcpiph_save.ti_dst;
@@ -464,6 +467,11 @@ send:
ip->ip_tos = so->so_iptos;
error = ip_output(so, m);
+ break;
+
+ default:
+ goto out;
+ }
if (error) {
out:
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
index cd021df..f1d62f6 100644
--- a/slirp/tcp_subr.c
+++ b/slirp/tcp_subr.c
@@ -78,12 +78,19 @@ tcp_template(struct tcpcb *tp)
n->ti_mbuf = NULL;
memset(&n->ti, 0, sizeof(n->ti));
n->ti_x0 = 0;
+ switch (so->so_ffamily) {
+ case AF_INET:
n->ti_pr = IPPROTO_TCP;
n->ti_len = htons(sizeof(struct tcphdr));
n->ti_src = so->so_faddr;
n->ti_dst = so->so_laddr;
n->ti_sport = so->so_fport;
n->ti_dport = so->so_lport;
+ break;
+
+ default:
+ break;
+ }
n->ti_seq = 0;
n->ti_ack = 0;
@@ -110,7 +117,7 @@ tcp_template(struct tcpcb *tp)
*/
void
tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m,
- tcp_seq ack, tcp_seq seq, int flags)
+ tcp_seq ack, tcp_seq seq, int flags, unsigned short af)
{
register int tlen;
int win = 0;
@@ -144,8 +151,14 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m,
m->m_len = sizeof (struct tcpiphdr);
tlen = 0;
#define xchg(a,b,type) { type t; t=a; a=b; b=t; }
+ switch (af) {
+ case AF_INET:
xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, uint32_t);
xchg(ti->ti_dport, ti->ti_sport, uint16_t);
+ break;
+ default:
+ break;
+ }
#undef xchg
}
ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen));
@@ -168,11 +181,15 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m,
ti->ti_sum = cksum(m, tlen);
struct tcpiphdr tcpiph_save = *(mtod(m, struct tcpiphdr *));
+ struct ip *ip;
+
+ switch (af) {
+ case AF_INET:
m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr)
- sizeof(struct ip);
m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr)
- sizeof(struct ip);
- struct ip *ip = mtod(m, struct ip *);
+ ip = mtod(m, struct ip *);
ip->ip_len = tlen;
ip->ip_dst = tcpiph_save.ti_dst;
ip->ip_src = tcpiph_save.ti_src;
@@ -185,6 +202,11 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m,
}
(void) ip_output((struct socket *)0, m);
+ break;
+
+ default:
+ break;
+ }
}
/*
@@ -388,8 +410,8 @@ void tcp_connect(struct socket *inso)
{
Slirp *slirp = inso->slirp;
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);
struct tcpcb *tp;
int s, opt;
@@ -414,9 +436,8 @@ 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;
+ so->lhost = inso->lhost;
+ so->so_ffamily = inso->so_ffamily;
}
tcp_mss(sototcpcb(so), 0);
@@ -432,7 +453,7 @@ void tcp_connect(struct socket *inso)
qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
socket_set_nodelay(s);
- so->fhost.sin = addr;
+ so->fhost.ss = addr;
sotranslate_accept(so);
/* Close the accept() socket, set right state */
diff --git a/slirp/tcp_timer.c b/slirp/tcp_timer.c
index 1214c2e..8f5dd77 100644
--- a/slirp/tcp_timer.c
+++ b/slirp/tcp_timer.c
@@ -278,7 +278,8 @@ tcp_timers(register struct tcpcb *tp, int timer)
* correspondent TCP to respond.
*/
tcp_respond(tp, &tp->t_template, (struct mbuf *)NULL,
- tp->rcv_nxt, tp->snd_una - 1, 0);
+ tp->rcv_nxt, tp->snd_una - 1, 0,
+ tp->t_socket->so_ffamily);
tp->t_timer[TCPT_KEEP] = TCPTV_KEEPINTVL;
} else
tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_IDLE;
--
2.7.0
next prev parent reply other threads:[~2016-02-08 10:29 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-08 10:28 [Qemu-devel] [PATCHv7 0/9] slirp: Adding IPv6 support to Qemu -net user mode Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 1/9] slirp: Adding IPv6, ICMPv6 Echo and NDP autoconfiguration Samuel Thibault
2016-02-09 16:14 ` Thomas Huth
2016-02-09 16:31 ` Samuel Thibault
2016-02-09 19:32 ` Thomas Huth
2016-02-09 20:16 ` Samuel Thibault
2016-02-09 16:31 ` Eric Blake
2016-02-09 16:35 ` Samuel Thibault
2016-02-09 19:56 ` Samuel Thibault
2016-02-09 20:49 ` Thomas Huth
2016-02-09 20:31 ` Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 2/9] slirp: Adding ICMPv6 error sending Samuel Thibault
2016-02-09 19:48 ` Thomas Huth
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 3/9] slirp: Adding IPv6 UDP support Samuel Thibault
2016-02-09 20:44 ` Thomas Huth
2016-02-09 21:13 ` Samuel Thibault
2016-02-09 21:19 ` Samuel Thibault
2016-02-10 7:18 ` Thomas Huth
2016-02-10 7:37 ` Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 4/9] slirp: Factorizing tcpiphdr structure with an union Samuel Thibault
2016-02-10 8:05 ` Thomas Huth
2016-02-10 9:28 ` Samuel Thibault
2016-02-10 10:08 ` Thomas Huth
2016-02-10 12:20 ` Samuel Thibault
2016-02-08 10:28 ` Samuel Thibault [this message]
2016-02-10 8:35 ` [Qemu-devel] [PATCHv7 5/9] slirp: Generalizing and neutralizing various TCP functions before adding IPv6 stuff Thomas Huth
2016-02-10 9:17 ` Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 6/9] slirp: Reindent after refactoring Samuel Thibault
2016-02-10 8:42 ` Thomas Huth
2016-02-10 9:20 ` Samuel Thibault
2016-02-11 17:56 ` Eric Blake
2016-02-11 18:15 ` Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 7/9] slirp: Handle IPv6 in TCP functions Samuel Thibault
2016-02-10 10:47 ` Thomas Huth
2016-02-10 12:30 ` Samuel Thibault
2016-02-10 12:41 ` Thomas Huth
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 8/9] slirp: Adding IPv6 address for DNS relay Samuel Thibault
2016-02-08 10:28 ` [Qemu-devel] [PATCHv7 9/9] qapi-schema, qemu-options & slirp: Adding Qemu options for IPv6 addresses Samuel Thibault
2016-02-08 22:12 ` Eric Blake
2016-02-10 11:39 ` Thomas Huth
2016-02-10 12:45 ` Samuel Thibault
2016-02-10 13:08 ` Daniel P. Berrange
2016-02-11 20:30 ` Thomas Huth
2016-02-14 17:47 [Qemu-devel] [PATCHv8 0/9] slirp: Adding IPv6 support to Qemu -net user mode Samuel Thibault
2016-02-14 17:47 ` [Qemu-devel] [PATCHv7 5/9] slirp: Generalizing and neutralizing various TCP functions before adding IPv6 stuff Samuel Thibault
2016-02-17 8:25 ` Thomas Huth
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