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"multi-prefix" capability 1/2: implement complete CAP infrastructure

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Now ngIRCd is able to handle "CAP LS", "CAP REQ", "CAP LIST", and
"CAP CLEAR" commands.

"multi-prefix" can be set/unset, but has no functionality - yet!
This commit is contained in:
Alexander Barton 2012-04-28 00:36:41 +02:00
parent f0a9dbe3ad
commit 1d7e99531a
2 changed files with 87 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/ngircd/client-cap.h
View File

@ -20,6 +20,8 @@
#define CLIENT_CAP_PENDING 1 /* Capability negotiation pending */
#define CLIENT_CAP_SUPPORTED 2 /* Client supports IRC capabilities */
#define CLIENT_CAP_MULTI_PREFIX 4 /* multi-prefix */
GLOBAL int Client_Cap PARAMS((CLIENT *Client));
GLOBAL void Client_CapSet PARAMS((CLIENT *Client, int Cap));

89
src/ngircd/irc-cap.c
View File

@ -42,6 +42,8 @@ bool Handle_CAP_END PARAMS((CLIENT *Client));
void Set_CAP_Negotiation PARAMS((CLIENT *Client));
int Parse_CAP PARAMS((int Capabilities, char *Args));
char *Get_CAP_String PARAMS((int Capabilities));
/**
* Handler for the IRCv3 "CAP" command.
@ -101,7 +103,9 @@ Handle_CAP_LS(CLIENT *Client, UNUSED char *Arg)
Set_CAP_Negotiation(Client);
return IRC_WriteStrClient(Client, "CAP %s LS :", Client_ID(Client));
return IRC_WriteStrClient(Client,
"CAP %s LS :multi-prefix",
Client_ID(Client));
}
/**
@ -116,7 +120,8 @@ Handle_CAP_LIST(CLIENT *Client, UNUSED char *Arg)
{
assert(Client != NULL);
return IRC_WriteStrClient(Client, "CAP %s LIST :", Client_ID(Client));
return IRC_WriteStrClient(Client, "CAP %s LIST :%s", Client_ID(Client),
Get_CAP_String(Client_Cap(Client)));
}
/**
@ -129,12 +134,21 @@ Handle_CAP_LIST(CLIENT *Client, UNUSED char *Arg)
bool
Handle_CAP_REQ(CLIENT *Client, char *Arg)
{
int new_cap;
assert(Client != NULL);
assert(Arg != NULL);
Set_CAP_Negotiation(Client);
return IRC_WriteStrClient(Client, "CAP %s NAK :%s",
new_cap = Parse_CAP(Client_Cap(Client), Arg);
if (new_cap < 0)
return IRC_WriteStrClient(Client, "CAP %s NAK :%s",
Client_ID(Client), Arg);
Client_CapSet(Client, new_cap);
return IRC_WriteStrClient(Client, "CAP %s ACK :%s",
Client_ID(Client), Arg);
}
@ -163,9 +177,16 @@ Handle_CAP_ACK(CLIENT *Client, char *Arg)
bool
Handle_CAP_CLEAR(CLIENT *Client)
{
int cap_old;
assert(Client != NULL);
return IRC_WriteStrClient(Client, "CAP %s ACK :", Client_ID(Client));
cap_old = Client_Cap(Client);
if (cap_old & CLIENT_CAP_MULTI_PREFIX)
Client_CapDel(Client, CLIENT_CAP_MULTI_PREFIX);
return IRC_WriteStrClient(Client, "CAP %s ACK :%s", Client_ID(Client),
Get_CAP_String(cap_old));
}
/**
@ -207,4 +228,64 @@ Set_CAP_Negotiation(CLIENT *Client)
Client_CapAdd(Client, CLIENT_CAP_SUPPORTED);
}
/**
* Parse capability string and return numeric flag value.
*
* @param Args The string containing space-separated capability names.
* @return Changed capability flags or 0 on error.
*/
int
Parse_CAP(int Capabilities, char *Args)
{
static char tmp[COMMAND_LEN];
char *ptr;
assert(Args != NULL);
strlcpy(tmp, Args, sizeof(tmp));
ptr = strtok(tmp, " ");
while (ptr) {
if (*ptr == '-') {
/* drop capabilities */
ptr++;
if (strcmp(ptr, "multi-prefix") == 0)
Capabilities &= ~CLIENT_CAP_MULTI_PREFIX;
else
return -1;
} else {
/* request capabilities */
if (strcmp(ptr, "multi-prefix") == 0)
Capabilities |= CLIENT_CAP_MULTI_PREFIX;
else
return -1;
}
ptr = strtok(NULL, " ");
}
return Capabilities;
}
/**
* Return textual representation of capability flags.
*
* Please note: this function returns a pointer to a global buffer and
* therefore isn't thread safe!
*
* @param Capabilities Capability flags (bitmask).
* @return Pointer to textual representation.
*/
char
*Get_CAP_String(int Capabilities)
{
static char txt[COMMAND_LEN];
txt[0] = '\0';
if (Capabilities & CLIENT_CAP_MULTI_PREFIX)
strlcat(txt, "multi-prefix ", sizeof(txt));
return txt;
}
/* -eof- */