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monitor: Remove unused code path

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nlmon_print_genl invokes genl_ctrl when a generic netlink control
message is encountered.  genl_ctrl() tries to filter nl80211 family
appearance messages and setup nlmon->id with the extracted family id.
However, the id is already provided inside main.c by using nlmon_open,
and no control messages are processed by nlmon in 'capture' mode (-r
command line argument not passed) since all genl messages go through
nlmon_message() path instead.
This commit is contained in:
Denis Kenzior 2023-12-26 15:13:07 -06:00
parent ba9717d445
commit 9ba6dac066
1 changed files with 3 additions and 33 deletions
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34
monitor/nlmon.c
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@ -7359,35 +7359,6 @@ void nlmon_destroy(struct nlmon *nlmon)
l_free(nlmon);
}
static void genl_ctrl(struct nlmon *nlmon, const void *data, uint32_t len)
{
const struct genlmsghdr *genlmsg = data;
const struct nlattr *nla;
char name[GENL_NAMSIZ];
uint16_t id = 0;
if (genlmsg->cmd != CTRL_CMD_NEWFAMILY)
return;
for (nla = data + GENL_HDRLEN; NLA_OK(nla, len);
nla = NLA_NEXT(nla, len)) {
switch (nla->nla_type & NLA_TYPE_MASK) {
case CTRL_ATTR_FAMILY_ID:
id = *((uint16_t *) NLA_DATA(nla));
break;
case CTRL_ATTR_FAMILY_NAME:
strncpy(name, NLA_DATA(nla), GENL_NAMSIZ - 1);
break;
}
}
if (id == 0)
return;
if (!strcmp(name, NL80211_GENL_NAME))
nlmon->id = id;
}
static const char *scope_to_string(uint8_t scope)
{
switch (scope) {
@ -8208,9 +8179,8 @@ void nlmon_print_genl(struct nlmon *nlmon, const struct timeval *tv,
for (nlmsg = data; NLMSG_OK(nlmsg, size);
nlmsg = NLMSG_NEXT(nlmsg, size)) {
if (nlmsg->nlmsg_type == GENL_ID_CTRL)
genl_ctrl(nlmon, NLMSG_DATA(nlmsg),
NLMSG_PAYLOAD(nlmsg, 0));
else
continue;
nlmon_message(nlmon, tv, NULL, nlmsg);
}
}