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Add support for the SCTP_PKTDROP_SUPPORTED socket option and

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the corresponding sysctl variable.
The default is off, since the specification is not an RFC yet.

MFC after: 1 week
This commit is contained in:
Michael Tuexen 2014-08-03 18:12:55 +00:00
parent 2ea1fcce34
commit cb9b8e6f7d
12 changed files with 90 additions and 11 deletions
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3
lib/libc/net/sctp_sys_calls.c
View File

@ -359,6 +359,9 @@ sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t * size)
case SCTP_NRSACK_SUPPORTED:
((struct sctp_assoc_value *)arg)->assoc_id = id;
break;
case SCTP_PKTDROP_SUPPORTED:
((struct sctp_assoc_value *)arg)->assoc_id = id;
break;
case SCTP_MAX_BURST:
((struct sctp_assoc_value *)arg)->assoc_id = id;
break;

1
sys/netinet/sctp.h
View File

@ -124,6 +124,7 @@ struct sctp_paramhdr {
#define SCTP_ECN_SUPPORTED 0x00000025
#define SCTP_PR_SUPPORTED 0x00000026
#define SCTP_NRSACK_SUPPORTED 0x00000027
#define SCTP_PKTDROP_SUPPORTED 0x00000028
/*
* read-only options

1
sys/netinet/sctp_input.c
View File

@ -2788,6 +2788,7 @@ sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
inp->ecn_supported = (*inp_p)->ecn_supported;
inp->prsctp_supported = (*inp_p)->prsctp_supported;
inp->nrsack_supported = (*inp_p)->nrsack_supported;
inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
inp->sctp_context = (*inp_p)->sctp_context;
inp->local_strreset_support = (*inp_p)->local_strreset_support;

7
sys/netinet/sctp_output.c
View File

@ -4817,7 +4817,9 @@ sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
if (stcb->asoc.prsctp_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
}
if (stcb->asoc.pktdrop_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
@ -5920,7 +5922,10 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
((asoc == NULL) && (inp->prsctp_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
}
if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
((asoc == NULL) && (inp->pktdrop_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
@ -11399,7 +11404,7 @@ sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
}
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->peer_supports_pktdrop == 0) {
if (asoc->pktdrop_supported == 0) {
/*-
* peer must declare support before I send one.
*/

7
sys/netinet/sctp_pcb.c
View File

@ -2486,6 +2486,7 @@ sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
/* init the small hash table we use to track asocid <-> tcb */
inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
if (inp->sctp_asocidhash == NULL) {
@ -6086,6 +6087,7 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
uint8_t ecn_supported;
uint8_t prsctp_supported;
uint8_t nrsack_supported;
uint8_t pktdrop_supported;
#ifdef INET
struct sockaddr_in sin;
@ -6118,6 +6120,7 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
ecn_supported = 0;
prsctp_supported = 0;
nrsack_supported = 0;
pktdrop_supported = 0;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
/* mark all addresses that we have currently on the list */
net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
@ -6455,7 +6458,6 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
return (-25);
}
stcb->asoc.peer_supports_asconf = 0;
stcb->asoc.peer_supports_pktdrop = 0;
stcb->asoc.peer_supports_strreset = 0;
stcb->asoc.peer_supports_auth = 0;
pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
@ -6470,7 +6472,7 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
prsctp_supported = 1;
break;
case SCTP_PACKET_DROPPED:
stcb->asoc.peer_supports_pktdrop = 1;
pktdrop_supported = 1;
break;
case SCTP_NR_SELECTIVE_ACK:
nrsack_supported = 1;
@ -6619,6 +6621,7 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
stcb->asoc.ecn_supported &= ecn_supported;
stcb->asoc.prsctp_supported &= prsctp_supported;
stcb->asoc.nrsack_supported &= nrsack_supported;
stcb->asoc.pktdrop_supported &= pktdrop_supported;
/* validate authentication required parameters */
if (got_random && got_hmacs) {
stcb->asoc.peer_supports_auth = 1;

1
sys/netinet/sctp_pcb.h
View File

@ -409,6 +409,7 @@ struct sctp_inpcb {
uint8_t ecn_supported;
uint8_t prsctp_supported;
uint8_t nrsack_supported;
uint8_t pktdrop_supported;
struct sctp_nonpad_sndrcvinfo def_send;
/*-
* These three are here for the sosend_dgram

1
sys/netinet/sctp_peeloff.c
View File

@ -121,6 +121,7 @@ sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
n_inp->ecn_supported = inp->ecn_supported;
n_inp->prsctp_supported = inp->prsctp_supported;
n_inp->nrsack_supported = inp->nrsack_supported;
n_inp->pktdrop_supported = inp->pktdrop_supported;
n_inp->partial_delivery_point = inp->partial_delivery_point;
n_inp->sctp_context = inp->sctp_context;
n_inp->local_strreset_support = inp->local_strreset_support;

6
sys/netinet/sctp_structs.h
View File

@ -1154,6 +1154,7 @@ struct sctp_association {
uint8_t ecn_supported;
uint8_t prsctp_supported;
uint8_t nrsack_supported;
uint8_t pktdrop_supported;
/* Did the peer make the stream config (add out) request */
uint8_t peer_req_out;
@ -1167,11 +1168,6 @@ struct sctp_association {
uint8_t local_strreset_support;
uint8_t peer_supports_nat;
/*
* packet drop's are supported by the peer, we don't really care
* about this but we bookkeep it anyway.
*/
uint8_t peer_supports_pktdrop;
struct sctp_scoping scope;
/* flags to handle send alternate net tracking */

6
sys/netinet/sctp_sysctl.c
View File

@ -56,6 +56,7 @@ sctp_init_sysctls()
SCTP_BASE_SYSCTL(sctp_ecn_enable) = SCTPCTL_ECN_ENABLE_DEFAULT;
SCTP_BASE_SYSCTL(sctp_pr_enable) = SCTPCTL_PR_ENABLE_DEFAULT;
SCTP_BASE_SYSCTL(sctp_nrsack_enable) = SCTPCTL_NRSACK_ENABLE_DEFAULT;
SCTP_BASE_SYSCTL(sctp_pktdrop_enable) = SCTPCTL_PKTDROP_ENABLE_DEFAULT;
SCTP_BASE_SYSCTL(sctp_strict_sacks) = SCTPCTL_STRICT_SACKS_DEFAULT;
SCTP_BASE_SYSCTL(sctp_peer_chunk_oh) = SCTPCTL_PEER_CHKOH_DEFAULT;
SCTP_BASE_SYSCTL(sctp_max_burst_default) = SCTPCTL_MAXBURST_DEFAULT;
@ -602,6 +603,7 @@ sysctl_sctp_check(SYSCTL_HANDLER_ARGS)
RANGECHK(SCTP_BASE_SYSCTL(sctp_ecn_enable), SCTPCTL_ECN_ENABLE_MIN, SCTPCTL_ECN_ENABLE_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_pr_enable), SCTPCTL_PR_ENABLE_MIN, SCTPCTL_PR_ENABLE_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_nrsack_enable), SCTPCTL_NRSACK_ENABLE_MIN, SCTPCTL_NRSACK_ENABLE_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_pktdrop_enable), SCTPCTL_PKTDROP_ENABLE_MIN, SCTPCTL_PKTDROP_ENABLE_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_strict_sacks), SCTPCTL_STRICT_SACKS_MIN, SCTPCTL_STRICT_SACKS_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_peer_chunk_oh), SCTPCTL_PEER_CHKOH_MIN, SCTPCTL_PEER_CHKOH_MAX);
RANGECHK(SCTP_BASE_SYSCTL(sctp_max_burst_default), SCTPCTL_MAXBURST_MIN, SCTPCTL_MAXBURST_MAX);
@ -869,6 +871,10 @@ SYSCTL_VNET_PROC(_net_inet_sctp, OID_AUTO, nrsack_enable, CTLTYPE_UINT | CTLFLAG
&SCTP_BASE_SYSCTL(sctp_nrsack_enable), 0, sysctl_sctp_check, "IU",
SCTPCTL_NRSACK_ENABLE_DESC);
SYSCTL_VNET_PROC(_net_inet_sctp, OID_AUTO, pktdrop_enable, CTLTYPE_UINT | CTLFLAG_RW,
&SCTP_BASE_SYSCTL(sctp_pktdrop_enable), 0, sysctl_sctp_check, "IU",
SCTPCTL_PKTDROP_ENABLE_DESC);
SYSCTL_VNET_PROC(_net_inet_sctp, OID_AUTO, strict_sacks, CTLTYPE_UINT | CTLFLAG_RW,
&SCTP_BASE_SYSCTL(sctp_strict_sacks), 0, sysctl_sctp_check, "IU",
SCTPCTL_STRICT_SACKS_DESC);

6
sys/netinet/sctp_sysctl.h
View File

@ -47,6 +47,7 @@ struct sctp_sysctl {
uint32_t sctp_ecn_enable;
uint32_t sctp_pr_enable;
uint32_t sctp_nrsack_enable;
uint32_t sctp_pktdrop_enable;
uint32_t sctp_fr_max_burst_default;
uint32_t sctp_strict_sacks;
uint32_t sctp_peer_chunk_oh;
@ -166,6 +167,11 @@ struct sctp_sysctl {
#define SCTPCTL_NRSACK_ENABLE_MAX 1
#define SCTPCTL_NRSACK_ENABLE_DEFAULT 0
/* pktdrop_enable: Enable SCTP Packet Drop Reports */
#define SCTPCTL_PKTDROP_ENABLE_DESC "Enable SCTP PKTDROP"
#define SCTPCTL_PKTDROP_ENABLE_MIN 0
#define SCTPCTL_PKTDROP_ENABLE_MAX 1
#define SCTPCTL_PKTDROP_ENABLE_DEFAULT 0
/* strict_sacks: Enable SCTP Strict SACK checking */
#define SCTPCTL_STRICT_SACKS_DESC "Enable SCTP Strict SACK checking"

56
sys/netinet/sctp_usrreq.c
View File

@ -3375,6 +3375,33 @@ sctp_getopt(struct socket *so, int optname, void *optval, size_t *optsize,
}
break;
}
case SCTP_PKTDROP_SUPPORTED:
{
struct sctp_assoc_value *av;
SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, *optsize);
SCTP_FIND_STCB(inp, stcb, av->assoc_id);
if (stcb) {
av->assoc_value = stcb->asoc.pktdrop_supported;
SCTP_TCB_UNLOCK(stcb);
} else {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
(av->assoc_id == SCTP_FUTURE_ASSOC)) {
SCTP_INP_RLOCK(inp);
av->assoc_value = inp->pktdrop_supported;
SCTP_INP_RUNLOCK(inp);
} else {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
error = EINVAL;
}
}
if (error == 0) {
*optsize = sizeof(struct sctp_assoc_value);
}
break;
}
case SCTP_ENABLE_STREAM_RESET:
{
struct sctp_assoc_value *av;
@ -6025,6 +6052,35 @@ sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize,
}
break;
}
case SCTP_PKTDROP_SUPPORTED:
{
struct sctp_assoc_value *av;
SCTP_CHECK_AND_CAST(av, optval, struct sctp_assoc_value, optsize);
SCTP_FIND_STCB(inp, stcb, av->assoc_id);
if (stcb) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
error = EINVAL;
SCTP_TCB_UNLOCK(stcb);
} else {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
(av->assoc_id == SCTP_FUTURE_ASSOC)) {
SCTP_INP_WLOCK(inp);
if (av->assoc_value == 0) {
inp->pktdrop_supported = 0;
} else {
inp->pktdrop_supported = 1;
}
SCTP_INP_WUNLOCK(inp);
} else {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL);
error = EINVAL;
}
}
break;
}
default:
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ENOPROTOOPT);
error = ENOPROTOOPT;

2
sys/netinet/sctputil.c
View File

@ -907,6 +907,7 @@ sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
asoc->ecn_supported = inp->ecn_supported;
asoc->prsctp_supported = inp->prsctp_supported;
asoc->nrsack_supported = inp->nrsack_supported;
asoc->pktdrop_supported = inp->pktdrop_supported;
asoc->sctp_cmt_pf = (uint8_t) 0;
asoc->sctp_frag_point = inp->sctp_frag_point;
asoc->sctp_features = inp->sctp_features;
@ -952,7 +953,6 @@ sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
sctp_select_initial_TSN(&inp->sctp_ep);
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
/* we are optimisitic here */
asoc->peer_supports_pktdrop = 1;
asoc->peer_supports_nat = 0;
asoc->sent_queue_retran_cnt = 0;