ss: Add support for SCTP protocol
This makes use of the sctp_diag interface recently added to the kernel. Joint work with Xin Long who provided the PoC implementation which I merely polished up a bit. Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter
Stephen Hemminger
parent
5dec02d7b4
commit
f89d46ad63
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@ -122,6 +122,9 @@ Display RAW sockets.
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.B \-x, \-\-unix
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Display Unix domain sockets (alias for -f unix).
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.TP
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.B \-S, \-\-sctp
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Display SCTP sockets.
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.TP
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.B \-f FAMILY, \-\-family=FAMILY
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Display sockets of type FAMILY.
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Currently the following families are supported: unix, inet, inet6, link, netlink.
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212
misc/ss.c
212
misc/ss.c
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@ -43,6 +43,7 @@
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#include <linux/filter.h>
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#include <linux/packet_diag.h>
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#include <linux/netlink_diag.h>
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#include <linux/sctp.h>
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#define MAGIC_SEQ 123456
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@ -102,6 +103,7 @@ int show_header = 1;
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/* If show_users & show_proc_ctx only do user_ent_hash_build() once */
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int user_ent_hash_build_init;
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int follow_events;
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int sctp_ino;
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int netid_width;
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int state_width;
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@ -111,6 +113,7 @@ int serv_width;
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int screen_width;
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static const char *TCP_PROTO = "tcp";
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static const char *SCTP_PROTO = "sctp";
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static const char *UDP_PROTO = "udp";
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static const char *RAW_PROTO = "raw";
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static const char *dg_proto;
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@ -126,13 +129,14 @@ enum {
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PACKET_DG_DB,
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PACKET_R_DB,
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NETLINK_DB,
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SCTP_DB,
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MAX_DB
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};
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#define PACKET_DBM ((1<<PACKET_DG_DB)|(1<<PACKET_R_DB))
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#define UNIX_DBM ((1<<UNIX_DG_DB)|(1<<UNIX_ST_DB)|(1<<UNIX_SQ_DB))
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#define ALL_DB ((1<<MAX_DB)-1)
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#define INET_DBM ((1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB)|(1<<RAW_DB))
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#define INET_DBM ((1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB)|(1<<RAW_DB)|(1<<SCTP_DB))
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enum {
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SS_UNKNOWN,
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@ -150,6 +154,17 @@ enum {
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SS_MAX
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};
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enum {
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SCTP_STATE_CLOSED = 0,
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SCTP_STATE_COOKIE_WAIT = 1,
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SCTP_STATE_COOKIE_ECHOED = 2,
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SCTP_STATE_ESTABLISHED = 3,
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SCTP_STATE_SHUTDOWN_PENDING = 4,
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SCTP_STATE_SHUTDOWN_SENT = 5,
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SCTP_STATE_SHUTDOWN_RECEIVED = 6,
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SCTP_STATE_SHUTDOWN_ACK_SENT = 7,
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};
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#define SS_ALL ((1 << SS_MAX) - 1)
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#define SS_CONN (SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)))
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@ -204,6 +219,10 @@ static const struct filter default_dbs[MAX_DB] = {
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.states = (1 << SS_CLOSE),
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.families = (1 << AF_NETLINK),
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},
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[SCTP_DB] = {
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.states = SS_CONN,
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.families = (1 << AF_INET) | (1 << AF_INET6),
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},
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};
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static const struct filter default_afs[AF_MAX] = {
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@ -264,6 +283,7 @@ static void filter_default_dbs(struct filter *f)
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filter_db_set(f, PACKET_R_DB);
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filter_db_set(f, PACKET_DG_DB);
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filter_db_set(f, NETLINK_DB);
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filter_db_set(f, SCTP_DB);
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}
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static void filter_states_set(struct filter *f, int states)
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@ -705,6 +725,17 @@ static const char *sstate_name[] = {
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[SS_CLOSING] = "CLOSING",
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};
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static const char *sctp_sstate_name[] = {
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[SCTP_STATE_CLOSED] = "CLOSED",
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[SCTP_STATE_COOKIE_WAIT] = "COOKIE_WAIT",
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[SCTP_STATE_COOKIE_ECHOED] = "COOKIE_ECHOED",
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[SCTP_STATE_ESTABLISHED] = "ESTAB",
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[SCTP_STATE_SHUTDOWN_PENDING] = "SHUTDOWN_PENDING",
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[SCTP_STATE_SHUTDOWN_SENT] = "SHUTDOWN_SENT",
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[SCTP_STATE_SHUTDOWN_RECEIVED] = "SHUTDOWN_RECEIVED",
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[SCTP_STATE_SHUTDOWN_ACK_SENT] = "ACK_SENT",
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};
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static const char *sstate_namel[] = {
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"UNKNOWN",
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[SS_ESTABLISHED] = "established",
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@ -793,12 +824,30 @@ struct tcpstat {
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struct tcp_bbr_info *bbr_info;
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};
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/* SCTP assocs share the same inode number with their parent endpoint. So if we
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* have seen the inode number before, it must be an assoc instead of the next
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* endpoint. */
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static bool is_sctp_assoc(struct sockstat *s, const char *sock_name)
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{
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if (strcmp(sock_name, "sctp"))
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return false;
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if (!sctp_ino || sctp_ino != s->ino)
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return false;
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return true;
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}
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static void sock_state_print(struct sockstat *s, const char *sock_name)
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{
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if (netid_width)
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printf("%-*s ", netid_width, sock_name);
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if (state_width)
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printf("%-*s ", state_width, sstate_name[s->state]);
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printf("%-*s ", netid_width,
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is_sctp_assoc(s, sock_name) ? "" : sock_name);
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if (state_width) {
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if (is_sctp_assoc(s, sock_name))
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printf("`- %-*s ", state_width - 3,
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sctp_sstate_name[s->state]);
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else
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printf("%-*s ", state_width, sstate_name[s->state]);
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}
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printf("%-6d %-6d ", s->rq, s->wq);
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}
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@ -908,6 +957,8 @@ static void init_service_resolver(void)
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c->proto = TCP_PROTO;
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else if (strcmp(proto, UDP_PROTO) == 0)
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c->proto = UDP_PROTO;
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else if (strcmp(proto, SCTP_PROTO) == 0)
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c->proto = SCTP_PROTO;
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else
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c->proto = NULL;
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c->next = rlist;
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@ -1679,6 +1730,8 @@ static char *proto_name(int protocol)
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return "udp";
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case IPPROTO_TCP:
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return "tcp";
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case IPPROTO_SCTP:
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return "sctp";
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case IPPROTO_DCCP:
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return "dccp";
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}
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@ -1771,6 +1824,56 @@ static char *sprint_bw(char *buf, double bw)
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return buf;
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}
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static void sctp_stats_print(struct sctp_info *s)
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{
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if (s->sctpi_tag)
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printf(" tag:%x", s->sctpi_tag);
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if (s->sctpi_state)
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printf(" state:%s", sctp_sstate_name[s->sctpi_state]);
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if (s->sctpi_rwnd)
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printf(" rwnd:%d", s->sctpi_rwnd);
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if (s->sctpi_unackdata)
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printf(" unackdata:%d", s->sctpi_unackdata);
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if (s->sctpi_penddata)
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printf(" penddata:%d", s->sctpi_penddata);
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if (s->sctpi_instrms)
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printf(" instrms:%d", s->sctpi_instrms);
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if (s->sctpi_outstrms)
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printf(" outstrms:%d", s->sctpi_outstrms);
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if (s->sctpi_inqueue)
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printf(" inqueue:%d", s->sctpi_inqueue);
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if (s->sctpi_outqueue)
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printf(" outqueue:%d", s->sctpi_outqueue);
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if (s->sctpi_overall_error)
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printf(" overerr:%d", s->sctpi_overall_error);
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if (s->sctpi_max_burst)
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printf(" maxburst:%d", s->sctpi_max_burst);
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if (s->sctpi_maxseg)
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printf(" maxseg:%d", s->sctpi_maxseg);
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if (s->sctpi_peer_rwnd)
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printf(" prwnd:%d", s->sctpi_peer_rwnd);
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if (s->sctpi_peer_tag)
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printf(" ptag:%x", s->sctpi_peer_tag);
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if (s->sctpi_peer_capable)
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printf(" pcapable:%d", s->sctpi_peer_capable);
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if (s->sctpi_peer_sack)
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printf(" psack:%d", s->sctpi_peer_sack);
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if (s->sctpi_s_autoclose)
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printf(" autoclose:%d", s->sctpi_s_autoclose);
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if (s->sctpi_s_adaptation_ind)
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printf(" adapind:%d", s->sctpi_s_adaptation_ind);
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if (s->sctpi_s_pd_point)
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printf(" pdpoint:%d", s->sctpi_s_pd_point);
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if (s->sctpi_s_nodelay)
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printf(" nodealy:%d", s->sctpi_s_nodelay);
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if (s->sctpi_s_disable_fragments)
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printf(" nofrag:%d", s->sctpi_s_disable_fragments);
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if (s->sctpi_s_v4mapped)
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printf(" v4mapped:%d", s->sctpi_s_v4mapped);
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if (s->sctpi_s_frag_interleave)
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printf(" fraginl:%d", s->sctpi_s_frag_interleave);
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}
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static void tcp_stats_print(struct tcpstat *s)
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{
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char b1[64];
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@ -1902,6 +2005,13 @@ static void tcp_timer_print(struct tcpstat *s)
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}
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}
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static void sctp_timer_print(struct tcpstat *s)
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{
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if (s->timer)
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printf(" timer:(T3_RTX,%s,%d)",
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print_ms_timer(s->timeout), s->retrans);
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}
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static int tcp_show_line(char *line, const struct filter *f, int family)
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{
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int rto = 0, ato = 0;
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@ -2168,6 +2278,64 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
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}
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}
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static const char *format_host_sa(struct sockaddr_storage *sa)
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{
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union {
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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} *saddr = (void *)sa;
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switch (sa->ss_family) {
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case AF_INET:
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return format_host(AF_INET, 4, &saddr->sin.sin_addr);
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case AF_INET6:
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return format_host(AF_INET6, 16, &saddr->sin6.sin6_addr);
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default:
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return "";
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}
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}
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static void sctp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
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struct rtattr *tb[])
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{
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struct sockaddr_storage *sa;
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int len;
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print_skmeminfo(tb, INET_DIAG_SKMEMINFO);
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if (tb[INET_DIAG_LOCALS]) {
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len = RTA_PAYLOAD(tb[INET_DIAG_LOCALS]);
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sa = RTA_DATA(tb[INET_DIAG_LOCALS]);
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printf("locals:%s", format_host_sa(sa));
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for (sa++, len -= sizeof(*sa); len > 0; sa++, len -= sizeof(*sa))
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printf(",%s", format_host_sa(sa));
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}
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if (tb[INET_DIAG_PEERS]) {
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len = RTA_PAYLOAD(tb[INET_DIAG_PEERS]);
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sa = RTA_DATA(tb[INET_DIAG_PEERS]);
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printf(" peers:%s", format_host_sa(sa));
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for (sa++, len -= sizeof(*sa); len > 0; sa++, len -= sizeof(*sa))
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printf(",%s", format_host_sa(sa));
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}
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if (tb[INET_DIAG_INFO]) {
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struct sctp_info *info;
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len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
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/* workaround for older kernels with less fields */
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if (len < sizeof(*info)) {
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info = alloca(sizeof(*info));
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memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
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memset((char *)info + len, 0, sizeof(*info) - len);
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} else
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info = RTA_DATA(tb[INET_DIAG_INFO]);
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sctp_stats_print(info);
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}
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}
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static void parse_diag_msg(struct nlmsghdr *nlh, struct sockstat *s)
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{
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struct rtattr *tb[INET_DIAG_MAX+1];
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@ -2221,7 +2389,10 @@ static int inet_show_sock(struct nlmsghdr *nlh,
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t.timer = r->idiag_timer;
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t.timeout = r->idiag_expires;
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t.retrans = r->idiag_retrans;
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tcp_timer_print(&t);
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if (protocol == IPPROTO_SCTP)
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sctp_timer_print(&t);
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else
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tcp_timer_print(&t);
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}
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if (show_details) {
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@ -2242,8 +2413,12 @@ static int inet_show_sock(struct nlmsghdr *nlh,
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if (show_mem || show_tcpinfo) {
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printf("\n\t");
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tcp_show_info(nlh, r, tb);
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if (protocol == IPPROTO_SCTP)
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sctp_show_info(nlh, r, tb);
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else
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tcp_show_info(nlh, r, tb);
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}
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sctp_ino = s->ino;
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printf("\n");
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return 0;
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@ -2627,6 +2802,17 @@ outerr:
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} while (0);
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}
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static int sctp_show(struct filter *f)
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{
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if (!filter_af_get(f, AF_INET) && !filter_af_get(f, AF_INET6))
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return 0;
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if (!getenv("PROC_NET_SCTP") && !getenv("PROC_ROOT")
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&& inet_show_netlink(f, NULL, IPPROTO_SCTP) == 0)
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return 0;
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return 0;
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}
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static int dgram_show_line(char *line, const struct filter *f, int family)
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{
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@ -3740,6 +3926,7 @@ static void _usage(FILE *dest)
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" -6, --ipv6 display only IP version 6 sockets\n"
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" -0, --packet display PACKET sockets\n"
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" -t, --tcp display only TCP sockets\n"
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" -S, --sctp display only SCTP sockets\n"
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" -u, --udp display only UDP sockets\n"
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" -d, --dccp display only DCCP sockets\n"
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" -w, --raw display only RAW sockets\n"
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@ -3822,6 +4009,7 @@ static const struct option long_opts[] = {
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{ "events", 0, 0, 'E' },
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{ "dccp", 0, 0, 'd' },
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{ "tcp", 0, 0, 't' },
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{ "sctp", 0, 0, 'S' },
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{ "udp", 0, 0, 'u' },
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{ "raw", 0, 0, 'w' },
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{ "unix", 0, 0, 'x' },
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@ -3857,7 +4045,7 @@ int main(int argc, char *argv[])
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int ch;
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int state_filter = 0;
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while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spbEf:miA:D:F:vVzZN:KH",
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while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spbEf:miA:D:F:vVzZN:KHS",
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long_opts, NULL)) != EOF) {
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switch (ch) {
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case 'n':
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@ -3896,6 +4084,9 @@ int main(int argc, char *argv[])
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case 't':
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filter_db_set(¤t_filter, TCP_DB);
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break;
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case 'S':
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filter_db_set(¤t_filter, SCTP_DB);
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break;
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case 'u':
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filter_db_set(¤t_filter, UDP_DB);
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break;
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@ -3960,6 +4151,7 @@ int main(int argc, char *argv[])
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filter_db_set(¤t_filter, UDP_DB);
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filter_db_set(¤t_filter, DCCP_DB);
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filter_db_set(¤t_filter, TCP_DB);
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filter_db_set(¤t_filter, SCTP_DB);
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filter_db_set(¤t_filter, RAW_DB);
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} else if (strcmp(p, "udp") == 0) {
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filter_db_set(¤t_filter, UDP_DB);
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@ -3967,6 +4159,8 @@ int main(int argc, char *argv[])
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filter_db_set(¤t_filter, DCCP_DB);
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} else if (strcmp(p, "tcp") == 0) {
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filter_db_set(¤t_filter, TCP_DB);
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} else if (strcmp(p, "sctp") == 0) {
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filter_db_set(¤t_filter, SCTP_DB);
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} else if (strcmp(p, "raw") == 0) {
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filter_db_set(¤t_filter, RAW_DB);
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} else if (strcmp(p, "unix") == 0) {
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@ -4091,7 +4285,7 @@ int main(int argc, char *argv[])
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filter_merge_defaults(¤t_filter);
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if (resolve_services && resolve_hosts &&
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(current_filter.dbs&(UNIX_DBM|(1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB))))
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(current_filter.dbs&(UNIX_DBM|(1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB)|(1<<SCTP_DB))))
|
||||
init_service_resolver();
|
||||
|
||||
|
||||
|
|
@ -4207,6 +4401,8 @@ int main(int argc, char *argv[])
|
|||
tcp_show(¤t_filter, IPPROTO_TCP);
|
||||
if (current_filter.dbs & (1<<DCCP_DB))
|
||||
tcp_show(¤t_filter, IPPROTO_DCCP);
|
||||
if (current_filter.dbs & (1<<SCTP_DB))
|
||||
sctp_show(¤t_filter);
|
||||
|
||||
if (show_users || show_proc_ctx || show_sock_ctx)
|
||||
user_ent_destroy();
|
||||
|
|
|
|||
Loading…
Reference in New Issue