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IO: Minor changes in socket AF handing

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AF can be specified implicitly by saddr or daddr, flags SKF_V4ONLY and
SKF_V6ONLY are to be removed.
This commit is contained in:
Ondrej Zajicek (work)
2016-05-17 15:21:49 +02:00
parent 5af7b59660
commit 08b3a24da5
10 changed files with 91 additions and 77 deletions
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73
sysdep/unix/io.c
View File

@@ -587,7 +587,6 @@ sockaddr_read(sockaddr *sa, int af, ip_addr *a, struct iface **ifa, uint *port)
return -1;
}
const int fam_to_af[] = { [SK_FAM_IPV4] = AF_INET, [SK_FAM_IPV6] = AF_INET6 };
/*
* IPv6 multicast syscalls
@@ -1194,7 +1193,7 @@ sk_setup(sock *s)
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
ERR("O_NONBLOCK");
if (!s->fam)
if (!s->af)
return 0;
if (ipa_nonzero(s->saddr) && !(s->flags & SKF_BIND))
@@ -1254,9 +1253,8 @@ sk_setup(sock *s)
if (sk_is_ipv6(s))
{
if (s->flags & SKF_V6ONLY)
if (setsockopt(fd, SOL_IPV6, IPV6_V6ONLY, &y, sizeof(y)) < 0)
ERR("IPV6_V6ONLY");
if (setsockopt(fd, SOL_IPV6, IPV6_V6ONLY, &y, sizeof(y)) < 0)
ERR("IPV6_V6ONLY");
if (s->flags & SKF_LADDR_RX)
if (sk_request_cmsg6_pktinfo(s) < 0)
@@ -1295,7 +1293,7 @@ sk_tcp_connected(sock *s)
int sa_len = sizeof(sa);
if ((getsockname(s->fd, &sa.sa, &sa_len) < 0) ||
(sockaddr_read(&sa, fam_to_af[s->fam], &s->saddr, &s->iface, &s->sport) < 0))
(sockaddr_read(&sa, s->af, &s->saddr, &s->iface, &s->sport) < 0))
log(L_WARN "SOCK: Cannot get local IP address for TCP>");
s->type = SK_TCP;
@@ -1320,7 +1318,7 @@ sk_passive_connected(sock *s, int type)
sock *t = sk_new(s->pool);
t->type = type;
t->fam = s->fam;
t->af = s->af;
t->fd = fd;
t->ttl = s->ttl;
t->tos = s->tos;
@@ -1330,10 +1328,10 @@ sk_passive_connected(sock *s, int type)
if (type == SK_TCP)
{
if ((getsockname(fd, &loc_sa.sa, &loc_sa_len) < 0) ||
(sockaddr_read(&loc_sa, fam_to_af[s->fam], &t->saddr, &t->iface, &t->sport) < 0))
(sockaddr_read(&loc_sa, s->af, &t->saddr, &t->iface, &t->sport) < 0))
log(L_WARN "SOCK: Cannot get local IP address for TCP<");
if (sockaddr_read(&rem_sa, fam_to_af[s->fam], &t->daddr, &t->iface, &t->dport) < 0)
if (sockaddr_read(&rem_sa, s->af, &t->daddr, &t->iface, &t->dport) < 0)
log(L_WARN "SOCK: Cannot get remote IP address for TCP<");
}
@@ -1368,40 +1366,74 @@ sk_passive_connected(sock *s, int type)
int
sk_open(sock *s)
{
int af = AF_UNSPEC;
int fd = -1;
int do_bind = 0;
int bind_port = 0;
ip_addr bind_addr = IPA_NONE;
sockaddr sa;
if (s->type <= SK_IP)
{
/*
* For TCP/IP sockets, Address family (IPv4 or IPv6) can be specified either
* explicitly (SK_IPV4 or SK_IPV6) or implicitly (based on saddr, daddr).
* But the specifications have to be consistent.
*/
switch (s->subtype)
{
case 0:
ASSERT(ipa_zero(s->saddr) || ipa_zero(s->daddr) ||
(ipa_is_ip4(s->saddr) == ipa_is_ip4(s->daddr)));
af = (ipa_is_ip4(s->saddr) || ipa_is_ip4(s->daddr)) ? AF_INET : AF_INET6;
break;
case SK_IPV4:
ASSERT(ipa_zero(s->saddr) || ipa_is_ip4(s->saddr));
ASSERT(ipa_zero(s->daddr) || ipa_is_ip4(s->daddr));
af = AF_INET;
break;
case SK_IPV6:
ASSERT(ipa_zero(s->saddr) || !ipa_is_ip4(s->saddr));
ASSERT(ipa_zero(s->daddr) || !ipa_is_ip4(s->daddr));
af = AF_INET6;
break;
default:
bug("Invalid subtype %d", s->subtype);
}
}
switch (s->type)
{
case SK_TCP_ACTIVE:
s->ttx = ""; /* Force s->ttx != s->tpos */
/* Fall thru */
case SK_TCP_PASSIVE:
fd = socket(fam_to_af[s->fam], SOCK_STREAM, IPPROTO_TCP);
fd = socket(af, SOCK_STREAM, IPPROTO_TCP);
bind_port = s->sport;
bind_addr = s->saddr;
do_bind = bind_port || ipa_nonzero(bind_addr);
break;
case SK_UDP:
fd = socket(fam_to_af[s->fam], SOCK_DGRAM, IPPROTO_UDP);
fd = socket(af, SOCK_DGRAM, IPPROTO_UDP);
bind_port = s->sport;
bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE;
do_bind = 1;
break;
case SK_IP:
fd = socket(fam_to_af[s->fam], SOCK_RAW, s->dport);
fd = socket(af, SOCK_RAW, s->dport);
bind_port = 0;
bind_addr = (s->flags & SKF_BIND) ? s->saddr : IPA_NONE;
do_bind = ipa_nonzero(bind_addr);
break;
case SK_MAGIC:
s->fam = SK_FAM_NONE;
af = 0;
fd = s->fd;
break;
@@ -1412,6 +1444,7 @@ sk_open(sock *s)
if (fd < 0)
ERR("socket");
s->af = af;
s->fd = fd;
if (sk_setup(s) < 0)
@@ -1440,7 +1473,7 @@ sk_open(sock *s)
if (sk_set_high_port(s) < 0)
log(L_WARN "Socket error: %s%#m", s->err);
sockaddr_fill(&sa, fam_to_af[s->fam], bind_addr, s->iface, bind_port);
sockaddr_fill(&sa, s->af, bind_addr, s->iface, bind_port);
if (bind(fd, &sa.sa, SA_LEN(sa)) < 0)
ERR2("bind");
}
@@ -1452,7 +1485,7 @@ sk_open(sock *s)
switch (s->type)
{
case SK_TCP_ACTIVE:
sockaddr_fill(&sa, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport);
if (connect(fd, &sa.sa, SA_LEN(sa)) >= 0)
sk_tcp_connected(s);
else if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS &&
@@ -1559,7 +1592,7 @@ sk_sendmsg(sock *s)
byte cmsg_buf[CMSG_TX_SPACE];
sockaddr dst;
sockaddr_fill(&dst, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
sockaddr_fill(&dst, s->af, s->daddr, s->iface, s->dport);
struct msghdr msg = {
.msg_name = &dst.sa,
@@ -1612,7 +1645,7 @@ sk_recvmsg(sock *s)
// rv = ipv4_skip_header(pbuf, rv);
//endif
sockaddr_read(&src, fam_to_af[s->fam], &s->faddr, NULL, &s->fport);
sockaddr_read(&src, s->af, &s->faddr, NULL, &s->fport);
sk_process_cmsgs(s, &msg);
if (msg.msg_flags & MSG_TRUNC)
@@ -1832,7 +1865,7 @@ sk_write(sock *s)
case SK_TCP_ACTIVE:
{
sockaddr sa;
sockaddr_fill(&sa, fam_to_af[s->fam], s->daddr, s->iface, s->dport);
sockaddr_fill(&sa, s->af, s->daddr, s->iface, s->dport);
if (connect(s->fd, &sa.sa, SA_LEN(sa)) >= 0 || errno == EISCONN)
sk_tcp_connected(s);
@@ -1853,10 +1886,10 @@ sk_write(sock *s)
}
int sk_is_ipv4(sock *s)
{ return s->fam == SK_FAM_IPV4; }
{ return s->af == AF_INET; }
int sk_is_ipv6(sock *s)
{ return s->fam == SK_FAM_IPV6; }
{ return s->af == AF_INET6; }
void
sk_dump_all(void)

2
sysdep/unix/unix.h
View File

@@ -102,8 +102,6 @@ int sk_open_unix(struct birdsock *s, char *name);
void *tracked_fopen(struct pool *, char *name, char *mode);
void test_old_bird(char *path);
extern const int fam_to_af[];
/* krt.c bits */
void krt_io_init(void);