*
* Copyright (C) 2005 Lee Hardy <lee@leeh.co.uk>
* Copyright (C) 2005 ircd-ratbox development team
+ * Copyright (C) 2016 Ariadne Conill <ariadne@dereferenced.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
- *
- * $Id: m_cap.c 676 2006-02-03 20:05:09Z gxti $
*/
#include "stdinc.h"
#include "s_conf.h"
#include "hash.h"
+static const char cap_desc[] = "Provides the commands used for client capability negotiation";
+
typedef int (*bqcmp)(const void *, const void *);
-static int m_cap(struct Client *, struct Client *, int, const char **);
-static int modinit(void);
+static void m_cap(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
struct Message cap_msgtab = {
- "CAP", 0, 0, 0, MFLG_SLOW,
+ "CAP", 0, 0, 0, 0,
{{m_cap, 2}, {m_cap, 2}, mg_ignore, mg_ignore, mg_ignore, {m_cap, 2}}
};
mapi_clist_av1 cap_clist[] = { &cap_msgtab, NULL };
-DECLARE_MODULE_AV1(cap, modinit, NULL, cap_clist, NULL, NULL, "$Revision: 676 $");
-#define _CLICAP(name, capserv, capclient, caprequired, flags) \
- { (name), (capserv), (capclient), (caprequired), (flags), sizeof(name) - 1 }
+DECLARE_MODULE_AV2(cap, NULL, NULL, cap_clist, NULL, NULL, NULL, NULL, cap_desc);
-#define CLICAP_FLAGS_STICKY 0x001
+#define IsCapableEntry(c, e) IsCapable(c, 1 << (e)->value)
+#define HasCapabilityFlag(c, f) (c->ownerdata != NULL && (((struct ClientCapability *)c->ownerdata)->flags & (f)) == f)
-static struct clicap
+static inline int
+clicap_visible(struct Client *client_p, const struct CapabilityEntry *cap)
{
- const char *name;
- int cap_serv; /* for altering s->c */
- int cap_cli; /* for altering c->s */
- int cap_required_serv; /* required dependency cap */
- int flags;
- int namelen;
-} clicap_list[] = {
- _CLICAP("multi-prefix", CLICAP_MULTI_PREFIX, 0, 0, 0),
- _CLICAP("sasl", CLICAP_SASL, 0, 0, CLICAP_FLAGS_STICKY),
- _CLICAP("account-notify", CLICAP_ACCOUNT_NOTIFY, 0, 0, 0),
- _CLICAP("extended-join", CLICAP_EXTENDED_JOIN, 0, 0, 0),
- _CLICAP("away-notify", CLICAP_AWAY_NOTIFY, 0, 0, 0),
- _CLICAP("tls", CLICAP_TLS, 0, 0, 0),
- _CLICAP("userhost-in-names", CLICAP_USERHOST_IN_NAMES, 0, 0, 0),
- _CLICAP("cap-notify", CLICAP_CAP_NOTIFY, 0, 0, 0),
- _CLICAP("chghost", CLICAP_CHGHOST, 0, 0, 0),
-};
+ struct ClientCapability *clicap;
-#define CLICAP_LIST_LEN (sizeof(clicap_list) / sizeof(struct clicap))
+ /* orphaned caps shouldn't be visible */
+ if (cap->flags & CAP_ORPHANED)
+ return 0;
-static int clicap_sort(struct clicap *, struct clicap *);
+ if (cap->ownerdata == NULL)
+ return 1;
-static int
-modinit(void)
-{
- qsort(clicap_list, CLICAP_LIST_LEN, sizeof(struct clicap),
- (bqcmp) clicap_sort);
- return 0;
-}
+ clicap = cap->ownerdata;
+ if (clicap->visible == NULL)
+ return 1;
-static int
-clicap_sort(struct clicap *one, struct clicap *two)
-{
- return irccmp(one->name, two->name);
-}
-
-static int
-clicap_compare(const char *name, struct clicap *cap)
-{
- return irccmp(name, cap->name);
+ return clicap->visible(client_p);
}
/* clicap_find()
* int pointer to whether we finish with success
* Ouputs: Cap entry if found, NULL otherwise.
*/
-static struct clicap *
+static struct CapabilityEntry *
clicap_find(const char *data, int *negate, int *finished)
{
static char buf[BUFSIZE];
static char *p;
- struct clicap *cap;
+ struct CapabilityEntry *cap;
char *s;
*negate = 0;
if((s = strchr(p, ' ')))
*s++ = '\0';
- if((cap = bsearch(p, clicap_list, CLICAP_LIST_LEN,
- sizeof(struct clicap), (bqcmp) clicap_compare)))
+ if((cap = capability_find(cli_capindex, p)) != NULL)
{
if(s)
p = s;
* Generates a list of capabilities.
*
* Inputs: client to send to, subcmd to send,
- * flags to match against: 0 to do none, -1 if client has no flags,
- * int to whether we are doing CAP CLEAR
+ * flags to match against: 0 to do none, -1 if client has no flags
* Outputs: None
*/
static void
-clicap_generate(struct Client *source_p, const char *subcmd, int flags, int clear)
+clicap_generate(struct Client *source_p, const char *subcmd, int flags)
{
- char buf[BUFSIZE];
- char capbuf[BUFSIZE];
- char *p;
- int buflen = 0;
- int curlen, mlen;
- size_t i;
-
- mlen = sprintf(buf, ":%s CAP %s %s",
+ const char *str_cont = "* :";
+ const char *str_final = ":";
+ struct CapabilityEntry *entry;
+ rb_dictionary_iter iter;
+ bool multiline_ret;
+ enum multiline_item_result multiline_item_ret;
+
+ multiline_ret = send_multiline_init(source_p, " ", ":%s CAP %s %s %s",
me.name,
EmptyString(source_p->name) ? "*" : source_p->name,
- subcmd);
-
- p = capbuf;
- buflen = mlen;
+ subcmd,
+ (source_p->flags & FLAGS_CLICAP_DATA) ? str_cont : str_final);
/* shortcut, nothing to do */
- if(flags == -1)
- {
- sendto_one(source_p, "%s :", buf);
+ if (flags == -1 || !multiline_ret) {
+ sendto_one(source_p, ":%s CAP %s %s %s",
+ me.name,
+ EmptyString(source_p->name) ? "*" : source_p->name,
+ subcmd,
+ str_final);
return;
}
- for(i = 0; i < CLICAP_LIST_LEN; i++)
- {
- if(flags)
+ for (int pass = 0; pass < 2; pass++)
+ RB_DICTIONARY_FOREACH(entry, &iter, cli_capindex->cap_dict) {
+ struct ClientCapability *clicap = entry->ownerdata;
+ const char *data = NULL;
+
+ if (pass == 0 && !HasCapabilityFlag(entry, CLICAP_FLAGS_PRIORITY))
+ continue;
+ else if (pass == 1 && HasCapabilityFlag(entry, CLICAP_FLAGS_PRIORITY))
+ continue;
+
+ if (!IsCapableEntry(source_p, entry) && ConfigFileEntry.hidden_caps != NULL)
{
- if(!IsCapable(source_p, clicap_list[i].cap_serv))
- continue;
- /* they are capable of this, check sticky */
- else if(clear && clicap_list[i].flags & CLICAP_FLAGS_STICKY)
+ size_t i;
+ for (i = 0; ConfigFileEntry.hidden_caps[i] != NULL; i++)
+ {
+ if (!rb_strcasecmp(entry->cap, ConfigFileEntry.hidden_caps[i]))
+ break;
+ }
+ if (ConfigFileEntry.hidden_caps[i] != NULL)
continue;
}
- if (clicap_list[i].cap_serv == CLICAP_SASL)
- {
- struct Client *agent_p = NULL;
+ if (flags && !IsCapableEntry(source_p, entry))
+ continue;
- if (!ConfigFileEntry.sasl_service)
- continue;
+ if (!clicap_visible(source_p, entry))
+ continue;
- agent_p = find_named_client(ConfigFileEntry.sasl_service);
- if (agent_p == NULL || !IsService(agent_p))
- continue;
- }
+ if (source_p->flags & FLAGS_CLICAP_DATA) {
+ if (!flags && clicap != NULL && clicap->data != NULL)
+ data = clicap->data(source_p);
- /* \r\n\0, possible "-~=", space, " *" */
- if(buflen + clicap_list[i].namelen >= BUFSIZE - 10)
- {
- /* remove our trailing space -- if buflen == mlen
- * here, we didnt even succeed in adding one.
- */
- if(buflen != mlen)
- *(p - 1) = '\0';
- else
- *p = '\0';
-
- sendto_one(source_p, "%s * :%s", buf, capbuf);
- p = capbuf;
- buflen = mlen;
- }
+ multiline_item_ret = send_multiline_item(source_p, "%s%s%s",
+ entry->cap,
+ data != NULL ? "=" : "",
+ data != NULL ? data : "");
- if(clear)
- {
- *p++ = '-';
- buflen++;
- }
+ if (multiline_item_ret == MULTILINE_FAILURE)
+ return;
+ } else {
+ multiline_item_ret = send_multiline_item(source_p, "%s", entry->cap);
- curlen = sprintf(p, "%s ", clicap_list[i].name);
- p += curlen;
- buflen += curlen;
+ if (multiline_item_ret != MULTILINE_SUCCESS) {
+ send_multiline_reset();
+ return;
+ }
+ }
}
- /* remove trailing space */
- if(buflen != mlen)
- *(p - 1) = '\0';
- else
- *p = '\0';
-
- sendto_one(source_p, "%s :%s", buf, capbuf);
+ send_multiline_fini(source_p, ":%s CAP %s %s %s",
+ me.name,
+ EmptyString(source_p->name) ? "*" : source_p->name,
+ subcmd,
+ str_final);
}
static void
cap_ack(struct Client *source_p, const char *arg)
{
- struct clicap *cap;
+ struct CapabilityEntry *cap;
int capadd = 0, capdel = 0;
int finished = 0, negate;
cap = clicap_find(NULL, &negate, &finished))
{
/* sent an ACK for something they havent REQd */
- if(!IsCapable(source_p, cap->cap_serv))
+ if(!IsCapableEntry(source_p, cap))
continue;
if(negate)
{
/* dont let them ack something sticky off */
- if(cap->flags & CLICAP_FLAGS_STICKY)
+ if(HasCapabilityFlag(cap, CLICAP_FLAGS_STICKY))
continue;
- capdel |= cap->cap_cli;
+ capdel |= (1 << cap->value);
}
else
- capadd |= cap->cap_cli;
+ capadd |= (1 << cap->value);
}
source_p->localClient->caps |= capadd;
source_p->localClient->caps &= ~capdel;
}
-static void
-cap_clear(struct Client *source_p, const char *arg)
-{
- clicap_generate(source_p, "ACK",
- source_p->localClient->caps ? source_p->localClient->caps : -1, 1);
-
- /* XXX - sticky capabs */
-#ifdef CLICAP_STICKY
- source_p->localClient->caps = source_p->localClient->caps & CLICAP_STICKY;
-#else
- source_p->localClient->caps = 0;
-#endif
-}
-
static void
cap_end(struct Client *source_p, const char *arg)
{
{
/* list of what theyre currently using */
clicap_generate(source_p, "LIST",
- source_p->localClient->caps ? source_p->localClient->caps : -1, 0);
+ source_p->localClient->caps ? source_p->localClient->caps : -1);
}
static void
cap_ls(struct Client *source_p, const char *arg)
{
+ int caps_version = 301;
+
if(!IsRegistered(source_p))
source_p->flags |= FLAGS_CLICAP;
+ if (!EmptyString(arg)) {
+ caps_version = atoi(arg);
+ }
+
+ if (caps_version >= 302) {
+ source_p->flags |= FLAGS_CLICAP_DATA;
+ source_p->localClient->caps |= CLICAP_CAP_NOTIFY;
+ }
+
/* list of what we support */
- clicap_generate(source_p, "LS", 0, 0);
+ clicap_generate(source_p, "LS", 0);
}
static void
cap_req(struct Client *source_p, const char *arg)
{
- char buf[BUFSIZE];
- char pbuf[2][BUFSIZE];
- struct clicap *cap;
- int buflen, plen;
- int i = 0;
+ char ack_buf[DATALEN+1];
+ struct CapabilityEntry *cap;
int capadd = 0, capdel = 0;
int finished = 0, negate;
+ int ret;
+ hook_data_cap_change hdata;
if(!IsRegistered(source_p))
source_p->flags |= FLAGS_CLICAP;
if(EmptyString(arg))
return;
- buflen = snprintf(buf, sizeof(buf), ":%s CAP %s ACK",
- me.name, EmptyString(source_p->name) ? "*" : source_p->name);
+ ret = snprintf(ack_buf, sizeof ack_buf, ":%s CAP %s ACK :%s",
+ me.name, EmptyString(source_p->name)? "*" : source_p->name, arg);
- pbuf[0][0] = '\0';
- plen = 0;
+ if (ret < 0 || ret > DATALEN)
+ {
+ sendto_one(source_p, ":%s CAP %s NAK :%s",
+ me.name, EmptyString(source_p->name) ? "*" : source_p->name, arg);
+ return;
+ }
for(cap = clicap_find(arg, &negate, &finished); cap;
cap = clicap_find(NULL, &negate, &finished))
{
- /* filled the first array, but cant send it in case the
- * request fails. one REQ should never fill more than two
- * buffers --fl
- */
- if(buflen + plen + cap->namelen + 6 >= BUFSIZE)
- {
- pbuf[1][0] = '\0';
- plen = 0;
- i = 1;
- }
-
if(negate)
{
- if(cap->flags & CLICAP_FLAGS_STICKY)
+ if(HasCapabilityFlag(cap, CLICAP_FLAGS_STICKY))
{
finished = 0;
break;
}
- strcat(pbuf[i], "-");
- plen++;
-
- capdel |= cap->cap_serv;
+ capdel |= (1 << cap->value);
}
else
{
- if(cap->cap_required_serv && !((capadd & cap->cap_required_serv) == cap->cap_required_serv || IsCapable(source_p, cap->cap_required_serv)))
+ if (!clicap_visible(source_p, cap))
{
finished = 0;
break;
}
- if (cap->cap_serv == CLICAP_SASL)
- {
- struct Client *agent_p = NULL;
-
- if (!ConfigFileEntry.sasl_service)
- {
- finished = 0;
- break;
- }
-
- agent_p = find_named_client(ConfigFileEntry.sasl_service);
- if (agent_p == NULL || !IsService(agent_p))
- {
- finished = 0;
- break;
- }
- }
-
- capadd |= cap->cap_serv;
- }
-
- if(cap->cap_cli)
- {
- strcat(pbuf[i], "~");
- plen++;
+ capadd |= (1 << cap->value);
}
- strcat(pbuf[i], cap->name);
- if (!finished) {
- strcat(pbuf[i], " ");
- plen += (cap->namelen + 1);
- }
}
if(!finished)
return;
}
- if(i)
- {
- sendto_one(source_p, "%s * :%s", buf, pbuf[0]);
- sendto_one(source_p, "%s :%s", buf, pbuf[1]);
- }
- else
- sendto_one(source_p, "%s :%s", buf, pbuf[0]);
+ sendto_one(source_p, "%s", ack_buf);
+
+ hdata.client = source_p;
+ hdata.oldcaps = source_p->localClient->caps;
+ hdata.add = capadd;
+ hdata.del = capdel;
source_p->localClient->caps |= capadd;
source_p->localClient->caps &= ~capdel;
+
+ call_hook(h_cap_change, &hdata);
}
static struct clicap_cmd
} clicap_cmdlist[] = {
/* This list *MUST* be in alphabetical order */
{ "ACK", cap_ack },
- { "CLEAR", cap_clear },
{ "END", cap_end },
{ "LIST", cap_list },
{ "LS", cap_ls },
return irccmp(command, entry->cmd);
}
-static int
-m_cap(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
+static void
+m_cap(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct clicap_cmd *cmd;
sendto_one(source_p, form_str(ERR_INVALIDCAPCMD),
me.name, EmptyString(source_p->name) ? "*" : source_p->name,
parv[1]);
- return 0;
+ return;
}
(cmd->func)(source_p, parv[2]);
- return 0;
}
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