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getClientPeerID introduced.

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The function returns an unique identifier for the client, as ip:port for
IPv4 and IPv6 clients, or as path:0 for Unix socket clients.

See the top comment in the function for more info.
This commit is contained in:
antirez 2013-07-09 12:49:20 +02:00
parent 631d656a94
commit 5cdc5da990
2 changed files with 36 additions and 7 deletions
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41
src/networking.c
View File

@ -1126,14 +1126,42 @@ void getClientsMaxBuffers(unsigned long *longest_output_list,
*biggest_input_buffer = bib;
}
/* A Redis "Peer ID" is a colon separated ip:port pair.
* For IPv4 it's in the form x.y.z.k:pork, example: "127.0.0.1:1234".
* For IPv6 addresses we use [] around the IP part, like in "[::1]:1234".
* For Unix socekts we use path:0, like in "/tmp/redis:0".
*
* A Peer ID always fits inside a buffer of REDIS_PEER_ID_LEN bytes, including
* the null term.
*
* The function is always successful, but if the IP or port can't be extracted
* for some reason, "?" and "0" are used (this is the semantics of
* anetPeerToString() from anet.c). In practical terms this should never
* happen. */
void getClientPeerId(redisClient *client, char *peerid, size_t peerid_len) {
char ip[REDIS_IP_STR_LEN];
int port;
if (client->flags & REDIS_UNIX_SOCKET) {
/* Unix socket client. */
snprintf(peerid,peerid_len,"%s:0",server.unixsocket);
return;
} else {
/* TCP client. */
anetPeerToString(client->fd,ip,sizeof(ip),&port);
if (strchr(ip,':'))
snprintf(peerid,peerid_len,"[%s]:%d",ip,port);
else
snprintf(peerid,peerid_len,"%s:%d",ip,port);
}
}
/* Turn a Redis client into an sds string representing its state. */
sds getClientInfoString(redisClient *client) {
char ip[REDIS_IP_STR_LEN], flags[16], events[3], *p;
int port = 0; /* initialized to zero for the unix socket case. */
char peerid[REDIS_PEER_ID_LEN], flags[16], events[3], *p;
int emask;
if (!(client->flags & REDIS_UNIX_SOCKET))
anetPeerToString(client->fd,ip,sizeof(ip),&port);
getClientPeerId(client,peerid,sizeof(peerid));
p = flags;
if (client->flags & REDIS_SLAVE) {
if (client->flags & REDIS_MONITOR)
@ -1158,9 +1186,8 @@ sds getClientInfoString(redisClient *client) {
if (emask & AE_WRITABLE) *p++ = 'w';
*p = '\0';
return sdscatprintf(sdsempty(),
"addr=%s:%d fd=%d name=%s age=%ld idle=%ld flags=%s db=%d sub=%d psub=%d multi=%d qbuf=%lu qbuf-free=%lu obl=%lu oll=%lu omem=%lu events=%s cmd=%s",
(client->flags & REDIS_UNIX_SOCKET) ? server.unixsocket : ip,
port,
"addr=%s fd=%d name=%s age=%ld idle=%ld flags=%s db=%d sub=%d psub=%d multi=%d qbuf=%lu qbuf-free=%lu obl=%lu oll=%lu omem=%lu events=%s cmd=%s",
peerid,
client->fd,
client->name ? (char*)client->name->ptr : "",
(long)(server.unixtime - client->ctime),

2
src/redis.h
View File

@ -121,6 +121,7 @@
#define REDIS_DEFAULT_MIN_SLAVES_TO_WRITE 0
#define REDIS_DEFAULT_MIN_SLAVES_MAX_LAG 10
#define REDIS_IP_STR_LEN INET6_ADDRSTRLEN
#define REDIS_PEER_ID_LEN (REDIS_IP_STR_LEN+32) /* Must be enough for ip:port */
#define REDIS_BINDADDR_MAX 16
/* Protocol and I/O related defines */
@ -1072,6 +1073,7 @@ void copyClientOutputBuffer(redisClient *dst, redisClient *src);
void *dupClientReplyValue(void *o);
void getClientsMaxBuffers(unsigned long *longest_output_list,
unsigned long *biggest_input_buffer);
void getClientPeerId(redisClient *client, char *peerid, size_t peerid_len);
sds getClientInfoString(redisClient *client);
sds getAllClientsInfoString(void);
void rewriteClientCommandVector(redisClient *c, int argc, ...);