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// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
// SPDX-License-Identifier: mit
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "amqp_private.h"
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void amqp_default_connection_info(struct amqp_connection_info *ci) {
/* Apply defaults */
ci->user = "guest";
ci->password = "guest";
ci->host = "localhost";
ci->port = 5672;
ci->vhost = "/";
ci->ssl = 0;
}
/* Scan for the next delimiter, handling percent-encodings on the way. */
static char find_delim(char **pp, int colon_and_at_sign_are_delims) {
char *from = *pp;
char *to = from;
for (;;) {
char ch = *from++;
switch (ch) {
case ':':
case '@':
if (!colon_and_at_sign_are_delims) {
*to++ = ch;
break;
}
/* fall through */
case 0:
case '/':
case '?':
case '#':
case '[':
case ']':
*to = 0;
*pp = from;
return ch;
case '%': {
unsigned int val;
int chars;
int res = sscanf(from, "%2x%n", &val, &chars);
if (res == EOF || res < 1 || chars != 2 || val > CHAR_MAX)
/* Return a surprising delimiter to
force an error. */
{
return '%';
}
*to++ = (char)val;
from += 2;
break;
}
default:
*to++ = ch;
break;
}
}
}
/* Parse an AMQP URL into its component parts. */
int amqp_parse_url(char *url, struct amqp_connection_info *parsed) {
int res = AMQP_STATUS_BAD_URL;
char delim;
char *start;
char *host;
char *port = NULL;
amqp_default_connection_info(parsed);
/* check the prefix */
if (!strncmp(url, "amqp://", 7)) {
/* do nothing */
} else if (!strncmp(url, "amqps://", 8)) {
parsed->port = 5671;
parsed->ssl = 1;
} else {
goto out;
}
host = start = url += (parsed->ssl ? 8 : 7);
delim = find_delim(&url, 1);
if (delim == ':') {
/* The colon could be introducing the port or the
password part of the userinfo. We don't know yet,
so stash the preceding component. */
port = start = url;
delim = find_delim(&url, 1);
}
if (delim == '@') {
/* What might have been the host and port were in fact
the username and password */
parsed->user = host;
if (port) {
parsed->password = port;
}
port = NULL;
host = start = url;
delim = find_delim(&url, 1);
}
if (delim == '[') {
/* IPv6 address. The bracket should be the first
character in the host. */
if (host != start || *host != 0) {
goto out;
}
start = url;
delim = find_delim(&url, 0);
if (delim != ']') {
goto out;
}
parsed->host = start;
start = url;
delim = find_delim(&url, 1);
/* Closing bracket should be the last character in the
host. */
if (*start != 0) {
goto out;
}
} else {
/* If we haven't seen the host yet, this is it. */
if (*host != 0) {
parsed->host = host;
}
}
if (delim == ':') {
port = url;
delim = find_delim(&url, 1);
}
if (port) {
char *end;
long portnum = strtol(port, &end, 10);
if (port == end || *end != 0 || portnum < 0 || portnum > 65535) {
goto out;
}
parsed->port = portnum;
}
if (delim == '/') {
start = url;
delim = find_delim(&url, 1);
if (delim != 0) {
goto out;
}
parsed->vhost = start;
res = AMQP_STATUS_OK;
} else if (delim == 0) {
res = AMQP_STATUS_OK;
}
/* Any other delimiter is bad, and we will return AMQP_STATUS_BAD_AMQP_URL. */
out:
return res;
}
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