* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
- *
- * $Id: m_who.c 3350 2007-04-02 22:03:08Z jilles $
*/
#include "stdinc.h"
-#include "common.h"
#include "client.h"
#include "channel.h"
#include "hash.h"
#include "modules.h"
#include "packet.h"
#include "s_newconf.h"
+#include "ratelimit.h"
+#include "supported.h"
#define FIELD_CHANNEL 0x0001
#define FIELD_HOP 0x0002
#define FIELD_ACCOUNT 0x0800
#define FIELD_OPLEVEL 0x1000 /* meaningless and stupid, but whatever */
+static const char who_desc[] =
+ "Provides the WHO command to display information for users on a channel";
+
struct who_format
{
int fields;
const char *querytype;
};
-static int m_who(struct Client *, struct Client *, int, const char **);
-
-struct Message who_msgtab = {
- "WHO", 0, 0, 0, MFLG_SLOW,
- {mg_unreg, {m_who, 2}, mg_ignore, mg_ignore, mg_ignore, {m_who, 2}}
-};
-
-mapi_clist_av1 who_clist[] = { &who_msgtab, NULL };
-DECLARE_MODULE_AV1(who, NULL, NULL, who_clist, NULL, NULL, "$Revision: 3350 $");
+static void m_who(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void do_who_on_channel(struct Client *source_p, struct Channel *chptr,
int server_oper, int member,
struct who_format *fmt);
-
static void who_global(struct Client *source_p, const char *mask, int server_oper, int operspy, struct who_format *fmt);
-
static void do_who(struct Client *source_p,
struct Client *target_p, struct membership *msptr,
struct who_format *fmt);
+struct Message who_msgtab = {
+ "WHO", 0, 0, 0, 0,
+ {mg_unreg, {m_who, 2}, mg_ignore, mg_ignore, mg_ignore, {m_who, 2}}
+};
+
+static int
+_modinit(void)
+{
+ add_isupport("WHOX", isupport_string, "");
+ return 0;
+}
+
+static void
+_moddeinit(void)
+{
+ delete_isupport("WHOX");
+}
+
+mapi_clist_av1 who_clist[] = { &who_msgtab, NULL };
+DECLARE_MODULE_AV2(who, _modinit, _moddeinit, who_clist, NULL, NULL, NULL, NULL, who_desc);
/*
** m_who
-** parv[0] = sender prefix
** parv[1] = nickname mask list
** parv[2] = additional selection flag and format options
*/
-static int
-m_who(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
+static void
+m_who(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static time_t last_used = 0;
struct Client *target_p;
fmt.querytype = "0";
}
- strlcpy(maskcopy, parv[1], sizeof maskcopy);
+ rb_strlcpy(maskcopy, parv[1], sizeof maskcopy);
mask = maskcopy;
collapse(mask);
if((*(mask + 1) == '\0') && (*mask == '*'))
{
if(source_p->user == NULL)
- return 0;
+ return;
if((lp = source_p->user->channel.head) != NULL)
{
msptr = lp->data;
- do_who_on_channel(source_p, msptr->chptr, server_oper, YES, &fmt);
+ do_who_on_channel(source_p, msptr->chptr, server_oper, true, &fmt);
}
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, "*");
- return 0;
+ return;
}
if(IsOperSpy(source_p) && *mask == '!')
{
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, parv[1]);
- return 0;
+ return;
}
}
{
/* List all users on a given channel */
chptr = find_channel(parv[1] + operspy);
+
if(chptr != NULL)
{
+ if (!IsOper(source_p) && !ratelimit_client_who(source_p, rb_dlink_list_length(&chptr->members)/50))
+ {
+ sendto_one(source_p, form_str(RPL_LOAD2HI),
+ me.name, source_p->name, "WHO");
+ sendto_one(source_p, form_str(RPL_ENDOFWHO),
+ me.name, source_p->name, "*");
+ return;
+ }
+
if(operspy)
report_operspy(source_p, "WHO", chptr->chname);
if(IsMember(source_p, chptr) || operspy)
- do_who_on_channel(source_p, chptr, server_oper, YES, &fmt);
+ do_who_on_channel(source_p, chptr, server_oper, true, &fmt);
else if(!SecretChannel(chptr))
- do_who_on_channel(source_p, chptr, server_oper, NO, &fmt);
+ do_who_on_channel(source_p, chptr, server_oper, false, &fmt);
}
+
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, parv[1] + operspy);
- return 0;
+ return;
}
/* '/who nick' */
else
do_who(source_p, target_p, NULL, &fmt);
- sendto_one(source_p, form_str(RPL_ENDOFWHO),
+ sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, mask);
- return 0;
+ return;
}
if(!IsFloodDone(source_p))
/* it has to be a global who at this point, limit it */
if(!IsOper(source_p))
{
- if((last_used + ConfigFileEntry.pace_wait) > rb_current_time())
+ if((last_used + ConfigFileEntry.pace_wait) > rb_current_time() || !ratelimit_client(source_p, 1))
{
sendto_one(source_p, form_str(RPL_LOAD2HI),
me.name, source_p->name, "WHO");
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, "*");
- return 0;
+ return;
}
else
last_used = rb_current_time();
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, mask);
-
- return 0;
}
/* who_common_channel
}
}
+/*
+ * append_format
+ *
+ * inputs - pointer to buffer
+ * - size of buffer
+ * - pointer to position
+ * - format string
+ * - arguments for format
+ * output - NONE
+ * side effects - position incremented, possibly beyond size of buffer
+ * this allows detecting overflow
+ */
+static void
+append_format(char *buf, size_t bufsize, size_t *pos, const char *fmt, ...)
+{
+ size_t max, result;
+ va_list ap;
+
+ max = *pos >= bufsize ? 0 : bufsize - *pos;
+ va_start(ap, fmt);
+ result = vsnprintf(buf + *pos, max, fmt, ap);
+ va_end(ap);
+ *pos += result;
+}
+
/*
* do_who
*
static void
do_who(struct Client *source_p, struct Client *target_p, struct membership *msptr, struct who_format *fmt)
{
- char status[5];
- char str[512], *p, *end;
+ char status[16];
+ char str[510 + 1]; /* linebuf.c will add \r\n */
+ size_t pos;
const char *q;
- rb_sprintf(status, "%c%s%s",
+ sprintf(status, "%c%s%s",
target_p->user->away ? 'G' : 'H', IsOper(target_p) ? "*" : "", msptr ? find_channel_status(msptr, fmt->fields || IsCapable(source_p, CLICAP_MULTI_PREFIX)) : "");
if (fmt->fields == 0)
source_p->name, msptr ? msptr->chptr->chname : "*",
target_p->username, target_p->host,
target_p->servptr->name, target_p->name, status,
- ConfigServerHide.flatten_links ? 0 : target_p->hopcount,
+ ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount,
target_p->info);
else
{
str[0] = '\0';
- p = str;
- end = str + sizeof str;
+ pos = 0;
+ append_format(str, sizeof str, &pos, ":%s %d %s",
+ me.name, RPL_WHOSPCRPL, source_p->name);
if (fmt->fields & FIELD_QUERYTYPE)
- p += rb_snprintf(p, end - p, " %s", fmt->querytype);
+ append_format(str, sizeof str, &pos, " %s", fmt->querytype);
if (fmt->fields & FIELD_CHANNEL)
- p += rb_snprintf(p, end - p, " %s", msptr ? msptr->chptr->chname : "*");
+ append_format(str, sizeof str, &pos, " %s", msptr ? msptr->chptr->chname : "*");
if (fmt->fields & FIELD_USER)
- p += rb_snprintf(p, end - p, " %s", target_p->username);
+ append_format(str, sizeof str, &pos, " %s", target_p->username);
if (fmt->fields & FIELD_IP)
{
if (show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
- p += rb_snprintf(p, end - p, " %s", target_p->sockhost);
+ append_format(str, sizeof str, &pos, " %s", target_p->sockhost);
else
- p += rb_snprintf(p, end - p, " %s", "255.255.255.255");
+ append_format(str, sizeof str, &pos, " %s", "255.255.255.255");
}
if (fmt->fields & FIELD_HOST)
- p += rb_snprintf(p, end - p, " %s", target_p->host);
+ append_format(str, sizeof str, &pos, " %s", target_p->host);
if (fmt->fields & FIELD_SERVER)
- p += rb_snprintf(p, end - p, " %s", target_p->servptr->name);
+ append_format(str, sizeof str, &pos, " %s", target_p->servptr->name);
if (fmt->fields & FIELD_NICK)
- p += rb_snprintf(p, end - p, " %s", target_p->name);
+ append_format(str, sizeof str, &pos, " %s", target_p->name);
if (fmt->fields & FIELD_FLAGS)
- p += rb_snprintf(p, end - p, " %s", status);
+ append_format(str, sizeof str, &pos, " %s", status);
if (fmt->fields & FIELD_HOP)
- p += rb_snprintf(p, end - p, " %d", ConfigServerHide.flatten_links ? 0 : target_p->hopcount);
+ append_format(str, sizeof str, &pos, " %d", ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount);
if (fmt->fields & FIELD_IDLE)
- p += rb_snprintf(p, end - p, " %d", MyClient(target_p) ? rb_current_time() - target_p->localClient->last : 0);
+ append_format(str, sizeof str, &pos, " %d", (int)(MyClient(target_p) ? rb_current_time() - target_p->localClient->last : 0));
if (fmt->fields & FIELD_ACCOUNT)
{
/* display as in whois */
}
else
q = "0";
- p += rb_snprintf(p, end - p, " %s", q);
+ append_format(str, sizeof str, &pos, " %s", q);
}
if (fmt->fields & FIELD_OPLEVEL)
- p += rb_snprintf(p, end - p, " %s", is_chanop(msptr) ? "999" : "n/a");
+ append_format(str, sizeof str, &pos, " %s", is_chanop(msptr) ? "999" : "n/a");
if (fmt->fields & FIELD_INFO)
- p += rb_snprintf(p, end - p, " :%s", target_p->info);
- sendto_one_numeric(source_p, RPL_WHOSPCRPL, "%s", str + 1);
+ append_format(str, sizeof str, &pos, " :%s", target_p->info);
+
+ if (pos >= sizeof str)
+ {
+ static bool warned = false;
+ if (!warned)
+ sendto_realops_snomask(SNO_DEBUG, L_NETWIDE,
+ "WHOX overflow while sending information about %s to %s",
+ target_p->name, source_p->name);
+ warned = true;
+ }
+ sendto_one(source_p, "%s", str);
}
}