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RESP3: initial implementation of the HELLO command.

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This commit is contained in:
antirez
2018-12-04 12:46:16 +01:00
parent e5fdd6b6bf
commit 4f0860cbfd
5 changed files with 73 additions and 15 deletions
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48
src/networking.c
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@ -1998,6 +1998,54 @@ NULL
}
}
/* HELLO <protocol-version> [AUTH <user> <password>] */
void helloCommand(client *c) {
long long ver;
if (getLongLongFromObject(c->argv[1],&ver) != C_OK ||
ver < 2 || ver > 3)
{
addReplyError(c,"-NOPROTO unsupported protocol version");
return;
}
/* Switching to protocol v2 is not allowed. But we send a specific
* error message in this case. */
if (ver == 2) {
addReplyError(c,"Switching to RESP version 2 is not allowed.");
return;
}
/* Let's switch to RESP3 mode. */
c->resp = 3;
addReplyMapLen(c,7);
addReplyBulkCString(c,"server");
addReplyBulkCString(c,"redis");
addReplyBulkCString(c,"version");
addReplyBulkCString(c,REDIS_VERSION);
addReplyBulkCString(c,"proto");
addReplyLongLong(c,3);
addReplyBulkCString(c,"id");
addReplyLongLong(c,c->id);
addReplyBulkCString(c,"mode");
if (server.sentinel_mode) addReplyBulkCString(c,"sentinel");
if (server.cluster_enabled) addReplyBulkCString(c,"cluster");
else addReplyBulkCString(c,"standalone");
if (!server.sentinel_mode) {
addReplyBulkCString(c,"role");
addReplyBulkCString(c,server.masterhost ? "replica" : "master");
}
addReplyBulkCString(c,"modules");
addReplyLoadedModules(c);
}
/* This callback is bound to POST and "Host:" command names. Those are not
* really commands, but are used in security attacks in order to talk to
* Redis instances via HTTP, with a technique called "cross protocol scripting"