#include <pexpert/pexpert.h>
-#define LOMTU 16384
-#define LOSNDQ_MAXLEN 256
-
-#define LO_BPF_TAP_OUT(_m) { \
- if (lo_statics[0].bpf_callback != NULL) { \
- bpf_tap_out(lo_ifp, DLT_NULL, _m, \
- &((struct loopback_header *)_m->m_pkthdr.pkt_hdr)-> \
- protocol, sizeof (u_int32_t)); \
- } \
+#define LOMTU 16384
+#define LOSNDQ_MAXLEN 256
+
+#define LO_BPF_TAP_OUT(_m) { \
+ if (lo_statics[0].bpf_callback != NULL) { \
+ bpf_tap_out(lo_ifp, DLT_NULL, _m, \
+ &((struct loopback_header *)_m->m_pkthdr.pkt_hdr)-> \
+ protocol, sizeof (u_int32_t)); \
+ } \
}
-#define LO_BPF_TAP_OUT_MULTI(_m) { \
- if (lo_statics[0].bpf_callback != NULL) { \
- struct mbuf *_n; \
- for (_n = _m; _n != NULL; _n = _n->m_nextpkt) \
- LO_BPF_TAP_OUT(_n); \
- } \
+#define LO_BPF_TAP_OUT_MULTI(_m) { \
+ if (lo_statics[0].bpf_callback != NULL) { \
+ struct mbuf *_n; \
+ for (_n = _m; _n != NULL; _n = _n->m_nextpkt) \
+ LO_BPF_TAP_OUT(_n); \
+ } \
}
struct lo_statics_str {
- int bpf_mode;
- bpf_packet_func bpf_callback;
+ int bpf_mode;
+ bpf_packet_func bpf_callback;
};
static struct lo_statics_str lo_statics[NLOOP];
struct ifnet *lo_ifp = NULL;
-struct loopback_header {
- protocol_family_t protocol;
+struct loopback_header {
+ protocol_family_t protocol;
};
/* Local forward declerations */
SYSCTL_NODE(_net_link, OID_AUTO, loopback, CTLFLAG_RW | CTLFLAG_LOCKED, 0,
"loopback interface");
-#define LO_BW_SLEEP 10
-static u_int32_t lo_bw_sleep_usec = LO_BW_SLEEP;
-SYSCTL_UINT(_net_link_loopback, OID_AUTO, bw_sleep_usec,
- CTLFLAG_RW | CTLFLAG_LOCKED, &lo_bw_sleep_usec, LO_BW_SLEEP, "");
-
-static u_int32_t lo_bw_measure = 0;
-SYSCTL_UINT(_net_link_loopback, OID_AUTO, bw_measure,
- CTLFLAG_RW | CTLFLAG_LOCKED, &lo_bw_measure, 0, "");
-
static u_int32_t lo_dequeue_max = LOSNDQ_MAXLEN;
SYSCTL_PROC(_net_link_loopback, OID_AUTO, max_dequeue,
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &lo_dequeue_max, LOSNDQ_MAXLEN,
*protocol_family = header->protocol;
- return (0);
+ return 0;
}
static errno_t
#pragma unused(ifp, dest, dest_linkaddr)
struct loopback_header *header;
- M_PREPEND(*m, sizeof (struct loopback_header), M_WAITOK, 1);
+ M_PREPEND(*m, sizeof(struct loopback_header), M_WAITOK, 1);
if (*m == NULL) {
/* Tell caller not to try to free passed-in mbuf */
- return (EJUSTRETURN);
+ return EJUSTRETURN;
}
- if (prepend_len != NULL)
- *prepend_len = sizeof (struct loopback_header);
- if (postpend_len != NULL)
+ if (prepend_len != NULL) {
+ *prepend_len = sizeof(struct loopback_header);
+ }
+ if (postpend_len != NULL) {
*postpend_len = 0;
+ }
header = mtod(*m, struct loopback_header *);
- bcopy(frame_type, &header->protocol, sizeof (u_int32_t));
- return (0);
+ bcopy(frame_type, &header->protocol, sizeof(u_int32_t));
+ return 0;
}
static errno_t
const struct ifnet_demux_desc *demux_array, u_int32_t demux_count)
{
#pragma unused(interface, protocol_family, demux_array, demux_count)
- return (0);
+ return 0;
}
static errno_t
lo_del_proto(struct ifnet *ifp, protocol_family_t protocol)
{
#pragma unused(ifp, protocol)
- return (0);
+ return 0;
}
static void
net_timernsec(&now, &ts);
error = mbuf_set_timestamp(m, ts, TRUE);
- if (error != 0)
+ if (error != 0) {
printf("%s: mbuf_set_timestamp() failed %d\n",
- __func__, error);
+ __func__, error);
+ }
}
}
error = mbuf_set_status(m, KERN_SUCCESS);
- if (error != 0)
+ if (error != 0) {
printf("%s: mbuf_set_status() failed %d\n",
- __func__, error);
+ __func__, error);
+ }
ifnet_tx_compl(ifp, m);
}
* This is used to match multicast packets, sent looping
* back, with the appropriate group record on input.
*/
- if (m->m_pkthdr.rcvif == NULL)
+ if (m->m_pkthdr.rcvif == NULL) {
m->m_pkthdr.rcvif = ifp;
+ }
m->m_pkthdr.pkt_flags |= PKTF_LOOP;
m->m_pkthdr.pkt_hdr = mtod(m, char *);
CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
CSUM_IP_CHECKED | CSUM_IP_VALID;
- m_adj(m, sizeof (struct loopback_header));
+ m_adj(m, sizeof(struct loopback_header));
LO_BPF_TAP_OUT(m);
if (m->m_nextpkt == NULL) {
s.bytes_in = len;
s.bytes_out = len;
- return (ifnet_input_extended(ifp, m_list, m_tail, &s));
+ return ifnet_input_extended(ifp, m_list, m_tail, &s);
}
/*
* This is used to match multicast packets, sent looping
* back, with the appropriate group record on input.
*/
- if (m->m_pkthdr.rcvif == NULL)
+ if (m->m_pkthdr.rcvif == NULL) {
m->m_pkthdr.rcvif = ifp;
+ }
m->m_pkthdr.pkt_flags |= PKTF_LOOP;
m->m_pkthdr.pkt_hdr = mtod(m, char *);
CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
CSUM_IP_CHECKED | CSUM_IP_VALID;
- m_adj(m, sizeof (struct loopback_header));
+ m_adj(m, sizeof(struct loopback_header));
/*
* Let the callee free it in case of error,
m = n;
}
- return (error);
+ return error;
}
/*
{
struct ifnet_stat_increment_param s;
- bzero(&s, sizeof (s));
+ bzero(&s, sizeof(s));
for (;;) {
struct mbuf *m = NULL, *m_tail = NULL;
u_int32_t cnt, len = 0;
- int sleep_chan = 0;
- struct timespec ts;
if (lo_sched_model == IFNET_SCHED_MODEL_NORMAL) {
if (ifnet_dequeue_multi(ifp, lo_dequeue_max, &m,
- &m_tail, &cnt, &len) != 0)
+ &m_tail, &cnt, &len) != 0) {
break;
+ }
} else {
if (ifnet_dequeue_service_class_multi(ifp,
lo_dequeue_sc, lo_dequeue_max, &m,
- &m_tail, &cnt, &len) != 0)
+ &m_tail, &cnt, &len) != 0) {
break;
+ }
}
LO_BPF_TAP_OUT_MULTI(m);
-
- if (lo_bw_measure) {
- if (cnt >= if_bw_measure_size)
- ifnet_transmit_burst_start(ifp, m);
- if (lo_bw_sleep_usec > 0) {
- bzero(&ts, sizeof(ts));
- ts.tv_nsec = (lo_bw_sleep_usec << 10) * cnt;
-
- /* Add msleep with timeout */
- (void) msleep(&sleep_chan, NULL,
- PSOCK, "lo_start", &ts);
- }
- if (cnt >= if_bw_measure_size)
- ifnet_transmit_burst_end(ifp, m_tail);
- }
lo_tx_compl(ifp, m);
/* stats are required for extended variant */
if (rt_flags & (RTF_REJECT | RTF_BLACKHOLE)) {
if (rt_flags & RTF_BLACKHOLE) {
m_freem(*m);
- return (EJUSTRETURN);
+ return EJUSTRETURN;
} else {
- return ((rt_flags & RTF_HOST) ?
- EHOSTUNREACH : ENETUNREACH);
+ return (rt_flags & RTF_HOST) ?
+ EHOSTUNREACH : ENETUNREACH;
}
}
}
- bcopy(&protocol_family, frame_type, sizeof (protocol_family));
+ bcopy(&protocol_family, frame_type, sizeof(protocol_family));
- return (0);
+ return 0;
}
/*
net_timernsec(&now, &ts);
error = mbuf_set_timestamp(m, ts, TRUE);
- if (error != 0)
+ if (error != 0) {
printf("%s: mbuf_set_timestamp() failed %d\n",
- __func__, error);
+ __func__, error);
+ }
}
- if (proto_input(protocol_family, m) != 0)
+ if (proto_input(protocol_family, m) != 0) {
m_freem(m);
- return (0);
+ }
+ return 0;
}
/* ARGSUSED */
int error = 0;
switch (cmd) {
-
- case SIOCSIFADDR: { /* struct ifaddr pointer */
+ case SIOCSIFADDR: { /* struct ifaddr pointer */
struct ifaddr *ifa = data;
- ifnet_set_flags(ifp, IFF_UP|IFF_RUNNING, IFF_UP|IFF_RUNNING);
+ ifnet_set_flags(ifp, IFF_UP | IFF_RUNNING, IFF_UP | IFF_RUNNING);
IFA_LOCK_SPIN(ifa);
ifa->ifa_rtrequest = lo_rtrequest;
IFA_UNLOCK(ifa);
break;
}
- case SIOCADDMULTI: /* struct ifreq */
- case SIOCDELMULTI: { /* struct ifreq */
+ case SIOCADDMULTI: /* struct ifreq */
+ case SIOCDELMULTI: { /* struct ifreq */
struct ifreq *ifr = data;
if (ifr == NULL) {
- error = EAFNOSUPPORT; /* XXX */
+ error = EAFNOSUPPORT; /* XXX */
break;
}
switch (ifr->ifr_addr.sa_family) {
-
#if INET
case AF_INET:
break;
break;
}
- case SIOCSIFMTU: { /* struct ifreq */
+ case SIOCSIFMTU: { /* struct ifreq */
struct ifreq *ifr = data;
- bcopy(&ifr->ifr_mtu, &ifp->if_mtu, sizeof (int));
+ bcopy(&ifr->ifr_mtu, &ifp->if_mtu, sizeof(int));
break;
}
- case SIOCSIFFLAGS: /* struct ifreq */
+ case SIOCSIFFLAGS: /* struct ifreq */
case SIOCSIFTIMESTAMPENABLE:
case SIOCSIFTIMESTAMPDISABLE:
break;
error = EOPNOTSUPP;
break;
}
- return (error);
+ return error;
}
#endif /* NLOOP > 0 */
static errno_t
lo_attach_proto(struct ifnet *ifp, protocol_family_t protocol_family)
{
- struct ifnet_attach_proto_param_v2 proto;
- errno_t result = 0;
+ struct ifnet_attach_proto_param_v2 proto;
+ errno_t result = 0;
- bzero(&proto, sizeof (proto));
+ bzero(&proto, sizeof(proto));
proto.input = lo_input;
proto.pre_output = lo_pre_output;
"returned=%d\n", protocol_family, result);
}
- return (result);
+ return result;
}
static void
/* Register protocol registration functions */
if ((error = proto_register_plumber(PF_INET,
- APPLE_IF_FAM_LOOPBACK, lo_attach_proto, NULL)) != 0)
+ APPLE_IF_FAM_LOOPBACK, lo_attach_proto, NULL)) != 0) {
printf("proto_register_plumber failed for AF_INET "
"error=%d\n", error);
+ }
if ((error = proto_register_plumber(PF_INET6,
- APPLE_IF_FAM_LOOPBACK, lo_attach_proto, NULL)) != 0)
+ APPLE_IF_FAM_LOOPBACK, lo_attach_proto, NULL)) != 0) {
printf("proto_register_plumber failed for AF_INET6 "
"error=%d\n", error);
+ }
}
static errno_t
lo_statics[0].bpf_mode = mode;
switch (mode) {
- case BPF_TAP_DISABLE:
- case BPF_TAP_INPUT:
- lo_statics[0].bpf_callback = NULL;
- break;
+ case BPF_TAP_DISABLE:
+ case BPF_TAP_INPUT:
+ lo_statics[0].bpf_callback = NULL;
+ break;
- case BPF_TAP_OUTPUT:
- case BPF_TAP_INPUT_OUTPUT:
- lo_statics[0].bpf_callback = bpf_callback;
- break;
+ case BPF_TAP_OUTPUT:
+ case BPF_TAP_INPUT_OUTPUT:
+ lo_statics[0].bpf_callback = bpf_callback;
+ break;
}
- return (0);
+ return 0;
}
/* ARGSUSED */
loopattach(void)
{
struct ifnet_init_eparams lo_init;
- errno_t result = 0;
+ errno_t result = 0;
- PE_parse_boot_argn("lo_txstart", &lo_txstart, sizeof (lo_txstart));
+ PE_parse_boot_argn("lo_txstart", &lo_txstart, sizeof(lo_txstart));
lo_reg_if_mods();
lo_statics[0].bpf_callback = NULL;
lo_statics[0].bpf_mode = BPF_TAP_DISABLE;
- bzero(&lo_init, sizeof (lo_init));
- lo_init.ver = IFNET_INIT_CURRENT_VERSION;
- lo_init.len = sizeof (lo_init);
- lo_init.sndq_maxlen = LOSNDQ_MAXLEN;
+ bzero(&lo_init, sizeof(lo_init));
+ lo_init.ver = IFNET_INIT_CURRENT_VERSION;
+ lo_init.len = sizeof(lo_init);
+ lo_init.sndq_maxlen = LOSNDQ_MAXLEN;
if (lo_txstart) {
- lo_init.flags = 0;
- lo_init.pre_enqueue = lo_pre_enqueue;
- lo_init.start = lo_start;
+ lo_init.flags = 0;
+ lo_init.pre_enqueue = lo_pre_enqueue;
+ lo_init.start = lo_start;
lo_init.output_sched_model = lo_sched_model;
} else {
- lo_init.flags = IFNET_INIT_LEGACY;
- lo_init.output = lo_output;
+ lo_init.flags = IFNET_INIT_LEGACY;
+ lo_init.output = lo_output;
}
- lo_init.name = "lo";
- lo_init.unit = 0;
- lo_init.family = IFNET_FAMILY_LOOPBACK;
- lo_init.type = IFT_LOOP;
- lo_init.demux = lo_demux;
- lo_init.add_proto = lo_add_proto;
- lo_init.del_proto = lo_del_proto;
- lo_init.framer_extended = lo_framer;
- lo_init.softc = &lo_statics[0];
- lo_init.ioctl = lo_ioctl;
- lo_init.set_bpf_tap = lo_set_bpf_tap;
+ lo_init.flags |= IFNET_INIT_NX_NOAUTO;
+ lo_init.name = "lo";
+ lo_init.unit = 0;
+ lo_init.family = IFNET_FAMILY_LOOPBACK;
+ lo_init.type = IFT_LOOP;
+ lo_init.demux = lo_demux;
+ lo_init.add_proto = lo_add_proto;
+ lo_init.del_proto = lo_del_proto;
+ lo_init.framer_extended = lo_framer;
+ lo_init.softc = &lo_statics[0];
+ lo_init.ioctl = lo_ioctl;
+ lo_init.set_bpf_tap = lo_set_bpf_tap;
result = ifnet_allocate_extended(&lo_init, &lo_ifp);
if (result != 0) {
IFNET_CSUM_TCPIPV6 | IFNET_CSUM_UDPIPV6 | IFNET_IPV6_FRAGMENT |
IFNET_CSUM_FRAGMENT | IFNET_IP_FRAGMENT | IFNET_MULTIPAGES |
IFNET_TX_STATUS | IFNET_SW_TIMESTAMP);
- ifnet_set_hdrlen(lo_ifp, sizeof (struct loopback_header));
+ ifnet_set_hdrlen(lo_ifp, sizeof(struct loopback_header));
ifnet_set_eflags(lo_ifp, IFEF_SENDLIST, IFEF_SENDLIST);
#if CONFIG_MACF_NET
__func__, result);
/* NOTREACHED */
}
- bpfattach(lo_ifp, DLT_NULL, sizeof (u_int32_t));
+ /*
+ * Disable ECN on loopback as ECN serves no purpose and otherwise
+ * TCP connections are subject to heuristics like SYN retransmits on RST
+ */
+ lo_ifp->if_eflags &= ~IFEF_ECN_ENABLE;
+ lo_ifp->if_eflags |= IFEF_ECN_DISABLE;
+
+ bpfattach(lo_ifp, DLT_NULL, sizeof(u_int32_t));
}
static int
i = lo_dequeue_max;
err = sysctl_handle_int(oidp, &i, 0, req);
- if (err != 0 || req->newptr == USER_ADDR_NULL)
- return (err);
+ if (err != 0 || req->newptr == USER_ADDR_NULL) {
+ return err;
+ }
- if (i < 1)
+ if (i < 1) {
i = 1;
- else if (i > LOSNDQ_MAXLEN)
+ } else if (i > LOSNDQ_MAXLEN) {
i = LOSNDQ_MAXLEN;
+ }
lo_dequeue_max = i;
- return (err);
+ return err;
}
static int
i = lo_sched_model;
err = sysctl_handle_int(oidp, &i, 0, req);
- if (err != 0 || req->newptr == USER_ADDR_NULL)
- return (err);
+ if (err != 0 || req->newptr == USER_ADDR_NULL) {
+ return err;
+ }
switch (i) {
case IFNET_SCHED_MODEL_NORMAL:
break;
}
- if (err == 0 && (err = ifnet_set_output_sched_model(lo_ifp, i)) == 0)
+ if (err == 0 && (err = ifnet_set_output_sched_model(lo_ifp, i)) == 0) {
lo_sched_model = i;
+ }
- return (err);
+ return err;
}
static int
i = lo_dequeue_scidx;
err = sysctl_handle_int(oidp, &i, 0, req);
- if (err != 0 || req->newptr == USER_ADDR_NULL)
- return (err);
+ if (err != 0 || req->newptr == USER_ADDR_NULL) {
+ return err;
+ }
- if (!MBUF_VALID_SCIDX(i))
- return (EINVAL);
+ if (!MBUF_VALID_SCIDX(i)) {
+ return EINVAL;
+ }
- if (lo_sched_model != IFNET_SCHED_MODEL_DRIVER_MANAGED)
- return (ENODEV);
+ if (lo_sched_model != IFNET_SCHED_MODEL_DRIVER_MANAGED) {
+ return ENODEV;
+ }
lo_dequeue_sc = m_service_class_from_idx(i);
lo_dequeue_scidx = MBUF_SCIDX(lo_dequeue_sc);
- return (err);
+ return err;
}
projects / apple / xnu.git / blobdiff