@@ -199,7 +199,7 @@ 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);
@@ -574,7 +574,8 @@ 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);
@@ -623,7 +624,8 @@ 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
}
@@ -352,7 +352,7 @@ 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 *, sa_family_t af);
int tcp_mss(register struct tcpcb *, u_int);
/* tcp_output.c */
@@ -363,7 +363,7 @@ 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, sa_family_t);
struct tcpcb * tcp_newtcpcb(struct socket *);
struct tcpcb * tcp_close(register struct tcpcb *);
void tcp_sockclosed(struct tcpcb *);
@@ -213,7 +213,7 @@ 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, sa_family_t af)
{
struct ip save_ip, *ip;
register struct tcpiphdr *ti;
@@ -254,6 +254,8 @@ 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 );
@@ -295,6 +297,11 @@ 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,
@@ -330,12 +337,18 @@ 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:
((struct sockaddr_in *)&lhost)->sin_addr = ti->ti_src;
((struct sockaddr_in *)&lhost)->sin_port = ti->ti_sport;
- fhost.ss_family = AF_INET;
((struct sockaddr_in *)&fhost)->sin_addr = ti->ti_dst;
((struct sockaddr_in *)&fhost)->sin_port = ti->ti_dport;
+ break;
+ default:
+ goto drop;
+ }
so = solookup(&slirp->tcp_last_so, &slirp->tcb, &lhost, &fhost);
@@ -385,8 +398,17 @@ 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;
@@ -565,7 +587,8 @@ 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) {
@@ -598,7 +621,7 @@ 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 */
@@ -607,7 +630,13 @@ 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);
@@ -1280,11 +1309,11 @@ 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;
@@ -1475,7 +1504,15 @@ tcp_mss(struct tcpcb *tp, u_int offer)
DEBUG_ARG("tp = %lx", (long)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:
+ /* :TODO:maethor:130319: ??? */
+ break;
+ }
+
if (offer)
mss = min(mss, offer);
mss = max(mss, 32);
@@ -60,7 +60,8 @@ 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;
@@ -446,13 +447,15 @@ 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;
@@ -463,6 +466,11 @@ send:
ip->ip_tos = so->so_iptos;
error = ip_output(so, m);
+ break;
+
+ default:
+ goto out;
+ }
if (error) {
out:
@@ -77,12 +77,20 @@ 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:
+ /* :TODO:maethor:130321: ? */
+ break;
+ }
n->ti_seq = 0;
n->ti_ack = 0;
@@ -109,7 +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, sa_family_t af)
{
register int tlen;
int win = 0;
@@ -143,8 +151,15 @@ 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:
+ /* :TODO:maethor:130321: ? */
+ break;
+ }
#undef xchg
}
ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen));
@@ -167,11 +182,15 @@ 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;
@@ -184,6 +203,12 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m,
}
(void) ip_output((struct socket *)0, m);
+ break;
+
+ default:
+ /* :TODO:maethor:130321: ? */
+ break;
+ }
}
/*
@@ -387,8 +412,8 @@ 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;
@@ -413,9 +438,8 @@ 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);
@@ -431,7 +455,7 @@ 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 */
@@ -277,7 +277,8 @@ 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;
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. Signed-off-by: Guillaume Subiron <maethor@subiron.org> --- slirp/ip_input.c | 2 +- slirp/slirp.c | 6 ++++-- slirp/slirp.h | 4 ++-- slirp/tcp_input.c | 53 +++++++++++++++++++++++++++++++++++++++++++++-------- slirp/tcp_output.c | 14 +++++++++++--- slirp/tcp_subr.c | 40 ++++++++++++++++++++++++++++++++-------- slirp/tcp_timer.c | 3 ++- 7 files changed, 97 insertions(+), 25 deletions(-)