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ss: allow AF_FAMILY constants >32 

Linux has more than 32 address families defined in <bits/socket.h>.  Use
a 64-bit type so all of them can be represented in the filter->families
bitmask.

It's easy to introduce bugs when using (1 << AF_FAMILY) because the
value is 32-bit.  This can produce incorrect results from bitmask
operations so introduce the FAMILY_MASK() macro to eliminate these bugs.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2017-10-06 11:48:39 -04:00 committed by Stephen Hemminger
parent e9b0d82dfa
commit b338a3e7e7
1 changed files with 28 additions and 26 deletions
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54
misc/ss.c
View File

@ -170,55 +170,57 @@ enum {
struct filter {
int dbs;
int states;
int families;
uint64_t families;
struct ssfilter *f;
bool kill;
};
#define FAMILY_MASK(family) ((uint64_t)1 << (family))
static const struct filter default_dbs[MAX_DB] = {
[TCP_DB] = {
.states = SS_CONN,
.families = (1 << AF_INET) | (1 << AF_INET6),
.families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
},
[DCCP_DB] = {
.states = SS_CONN,
.families = (1 << AF_INET) | (1 << AF_INET6),
.families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
},
[UDP_DB] = {
.states = (1 << SS_ESTABLISHED),
.families = (1 << AF_INET) | (1 << AF_INET6),
.families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
},
[RAW_DB] = {
.states = (1 << SS_ESTABLISHED),
.families = (1 << AF_INET) | (1 << AF_INET6),
.families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
},
[UNIX_DG_DB] = {
.states = (1 << SS_CLOSE),
.families = (1 << AF_UNIX),
.families = FAMILY_MASK(AF_UNIX),
},
[UNIX_ST_DB] = {
.states = SS_CONN,
.families = (1 << AF_UNIX),
.families = FAMILY_MASK(AF_UNIX),
},
[UNIX_SQ_DB] = {
.states = SS_CONN,
.families = (1 << AF_UNIX),
.families = FAMILY_MASK(AF_UNIX),
},
[PACKET_DG_DB] = {
.states = (1 << SS_CLOSE),
.families = (1 << AF_PACKET),
.families = FAMILY_MASK(AF_PACKET),
},
[PACKET_R_DB] = {
.states = (1 << SS_CLOSE),
.families = (1 << AF_PACKET),
.families = FAMILY_MASK(AF_PACKET),
},
[NETLINK_DB] = {
.states = (1 << SS_CLOSE),
.families = (1 << AF_NETLINK),
.families = FAMILY_MASK(AF_NETLINK),
},
[SCTP_DB] = {
.states = SS_CONN,
.families = (1 << AF_INET) | (1 << AF_INET6),
.families = FAMILY_MASK(AF_INET) | FAMILY_MASK(AF_INET6),
},
};
@ -258,14 +260,14 @@ static void filter_db_set(struct filter *f, int db)
static void filter_af_set(struct filter *f, int af)
{
f->states |= default_afs[af].states;
f->families |= 1 << af;
f->families |= FAMILY_MASK(af);
do_default = 0;
preferred_family = af;
}
static int filter_af_get(struct filter *f, int af)
{
return f->families & (1 << af);
return !!(f->families & FAMILY_MASK(af));
}
static void filter_default_dbs(struct filter *f)
@ -302,7 +304,7 @@ static void filter_merge_defaults(struct filter *f)
f->families |= default_dbs[db].families;
}
for (af = 0; af < AF_MAX; af++) {
if (!(f->families & (1 << af)))
if (!(f->families & FAMILY_MASK(af)))
continue;
if (!(default_afs[af].dbs & f->dbs))
@ -2608,7 +2610,7 @@ static int show_one_inet_sock(const struct sockaddr_nl *addr,
struct inet_diag_msg *r = NLMSG_DATA(h);
struct sockstat s = {};
if (!(diag_arg->f->families & (1 << r->idiag_family)))
if (!(diag_arg->f->families & FAMILY_MASK(r->idiag_family)))
return 0;
parse_diag_msg(h, &s);
@ -2802,7 +2804,7 @@ static int tcp_show(struct filter *f)
return -1;
}
if (f->families & (1<<AF_INET)) {
if (f->families & FAMILY_MASK(AF_INET)) {
if ((fp = net_tcp_open()) == NULL)
goto outerr;
@ -2812,7 +2814,7 @@ static int tcp_show(struct filter *f)
fclose(fp);
}
if ((f->families & (1<<AF_INET6)) &&
if ((f->families & FAMILY_MASK(AF_INET6)) &&
(fp = net_tcp6_open()) != NULL) {
setbuffer(fp, buf, bufsize);
if (generic_record_read(fp, tcp_show_line, f, AF_INET6))
@ -2911,7 +2913,7 @@ static int udp_show(struct filter *f)
&& inet_show_netlink(f, NULL, IPPROTO_UDP) == 0)
return 0;
if (f->families&(1<<AF_INET)) {
if (f->families&FAMILY_MASK(AF_INET)) {
if ((fp = net_udp_open()) == NULL)
goto outerr;
if (generic_record_read(fp, dgram_show_line, f, AF_INET))
@ -2919,7 +2921,7 @@ static int udp_show(struct filter *f)
fclose(fp);
}
if ((f->families&(1<<AF_INET6)) &&
if ((f->families&FAMILY_MASK(AF_INET6)) &&
(fp = net_udp6_open()) != NULL) {
if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
goto outerr;
@ -2951,7 +2953,7 @@ static int raw_show(struct filter *f)
inet_show_netlink(f, NULL, IPPROTO_RAW) == 0)
return 0;
if (f->families&(1<<AF_INET)) {
if (f->families&FAMILY_MASK(AF_INET)) {
if ((fp = net_raw_open()) == NULL)
goto outerr;
if (generic_record_read(fp, dgram_show_line, f, AF_INET))
@ -2959,7 +2961,7 @@ static int raw_show(struct filter *f)
fclose(fp);
}
if ((f->families&(1<<AF_INET6)) &&
if ((f->families&FAMILY_MASK(AF_INET6)) &&
(fp = net_raw6_open()) != NULL) {
if (generic_record_read(fp, dgram_show_line, f, AF_INET6))
goto outerr;
@ -3703,13 +3705,13 @@ static int handle_follow_request(struct filter *f)
int groups = 0;
struct rtnl_handle rth;
if (f->families & (1 << AF_INET) && f->dbs & (1 << TCP_DB))
if (f->families & FAMILY_MASK(AF_INET) && f->dbs & (1 << TCP_DB))
groups |= 1 << (SKNLGRP_INET_TCP_DESTROY - 1);
if (f->families & (1 << AF_INET) && f->dbs & (1 << UDP_DB))
if (f->families & FAMILY_MASK(AF_INET) && f->dbs & (1 << UDP_DB))
groups |= 1 << (SKNLGRP_INET_UDP_DESTROY - 1);
if (f->families & (1 << AF_INET6) && f->dbs & (1 << TCP_DB))
if (f->families & FAMILY_MASK(AF_INET6) && f->dbs & (1 << TCP_DB))
groups |= 1 << (SKNLGRP_INET6_TCP_DESTROY - 1);
if (f->families & (1 << AF_INET6) && f->dbs & (1 << UDP_DB))
if (f->families & FAMILY_MASK(AF_INET6) && f->dbs & (1 << UDP_DB))
groups |= 1 << (SKNLGRP_INET6_UDP_DESTROY - 1);
if (groups == 0)