/* Set up ip4/udp headers. The dest addr and ports are not set and
* there are no IP options. The source port is defaulted to port 0
*/
static void ci_udp_hdrs_init(ci_ip_cached_hdrs* ipcache)
{
/* Caller should already have done ci_ip_cache_init(). */
ci_ip_hdr_init_fixed(&ipcache->ip, IPPROTO_UDP,
CI_IP_DFLT_TTL, CI_IP_DFLT_TOS);
ipcache->ip.ip_saddr_be32 = 0;
ipcache->ip.ip_daddr_be32 = 0;
}
/* Set the IP TOS */
void ci_udp_set_tos( ci_udp_state* us, ci_uint32 tos )
{
ci_ip_hdr_init_fixed(UDP_IP_HDR(us), IPPROTO_UDP, UDP_IP_HDR(us)->ip_ttl,
CI_MIN(tos, CI_IP_MAX_TOS));
}
/*! Copy socket options and related fields that should be inherited.
* Inherits into [ts] from [s] & [c]. Options are inherited during EP
* promotion for unix, during accept handler in Windows & as a result of
* setsockopt:SOL_SOCKET:SO_UPDATE_ACCEPT_CONTEXT. MUST have a lock on
* [ts]. [or_nonblock] controls whether the non-blocking state from [s]
* overwrites that in [ts] or is OR'd into it.
*/
static void ci_tcp_inherit_options(ci_netif* ni, ci_sock_cmn* s,
ci_tcp_socket_cmn* c,
ci_tcp_state* ts, const char* ctxt)
{
ci_assert(ni);
ci_assert(s);
ci_assert(c);
ci_assert(ts);
ts->s.so = s->so;
ts->s.cp.so_bindtodevice = s->cp.so_bindtodevice;
ts->s.cp.ip_ttl = s->cp.ip_ttl;
ts->s.rx_bind2dev_ifindex = s->rx_bind2dev_ifindex;
ts->s.rx_bind2dev_base_ifindex = s->rx_bind2dev_base_ifindex;
ts->s.rx_bind2dev_vlan = s->rx_bind2dev_vlan;
ci_tcp_set_sndbuf(ni, ts); /* eff_mss must be valid */
ci_tcp_set_rcvbuf(ni, ts); /* and amss, and rcv_wscl */
{
/* NB. We have exclusive access to [ts], so it is safe to manipulate
** s_aflags without using bit-ops. */
unsigned inherited_sflags = CI_SOCK_AFLAG_TCP_INHERITED;
unsigned inherited_sbflags = 0;
if( NI_OPTS(ni).accept_inherit_nonblock )
inherited_sbflags |= CI_SB_AFLAG_O_NONBLOCK | CI_SB_AFLAG_O_NDELAY;
ci_assert((ts->s.s_aflags & inherited_sflags) == 0);
ci_atomic32_or(&ts->s.s_aflags, s->s_aflags & inherited_sflags);
if( NI_OPTS(ni).tcp_force_nodelay == 1 )
ci_bit_set(&ts->s.s_aflags, CI_SOCK_AFLAG_NODELAY_BIT);
else if( NI_OPTS(ni).tcp_force_nodelay == 2 )
ci_bit_clear(&ts->s.s_aflags, CI_SOCK_AFLAG_NODELAY_BIT);
ci_assert((ts->s.b.sb_aflags & inherited_sbflags) == 0);
ci_atomic32_or(&ts->s.b.sb_aflags, s->b.sb_aflags & inherited_sbflags);
ci_assert_equal((ts->s.s_flags & CI_SOCK_FLAG_TCP_INHERITED),
CI_SOCK_FLAG_PMTU_DO);
ts->s.s_flags &= ~CI_SOCK_FLAG_PMTU_DO;
ts->s.s_flags |= s->s_flags & CI_SOCK_FLAG_TCP_INHERITED;
}
/* Bug1861: while not defined as such, various SOL_TCP/SOL_IP sockopts
* are inherited in Linux. */
/* TCP_KEEPIDLE, TCP_KEEPINTVL, TCP_KEEPCNT */
ts->c.t_ka_time = c->t_ka_time;
ts->c.t_ka_time_in_secs = c->t_ka_time_in_secs;
ts->c.t_ka_intvl = c->t_ka_intvl;
ts->c.t_ka_intvl_in_secs = c->t_ka_intvl_in_secs;
ts->c.ka_probe_th = c->ka_probe_th;
ci_ip_hdr_init_fixed(&ts->s.pkt.ip, IPPROTO_TCP,
s->pkt.ip.ip_ttl,
s->pkt.ip.ip_tos);
ts->s.cmsg_flags = s->cmsg_flags;
ts->s.timestamping_flags = s->timestamping_flags;
/* Must have set up so.sndbuf */
ci_tcp_init_rcv_wnd(ts, ctxt);
}