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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(__FreeBSD__) || defined(_AIX)
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#include <netdb.h>
#define BUF_SIZE 128
#define ROUND_UP_128(x) (-(-(x) & -128))
int safe_cat(char **pstr, int *plen, int pos, const char *src)
{
size_t len2 = strlen(src);
size_t new_size = pos + len2 + 1;
if (*plen < new_size) {
size_t round_up = ROUND_UP_128(new_size);
void* p = realloc(*pstr, round_up);
if (!p) {
printf("Out of memory\n");
exit(1);
} else {
*pstr = p;
}
}
memcpy(*pstr + pos, src, len2 + 1);
return pos + len2;
}
char *resolve_addrs(const char *orig_str)
{
int len = BUF_SIZE;
char *new_str = (char *)malloc(len);
if (!new_str) {
return NULL;
}
char *saveptr = NULL;
char *buf = strdup(orig_str);
const char *delim = ",; ";
char *tok = strtok_r(buf, delim, &saveptr);
int pos = 0;
while (tok) {
struct addrinfo hint;
struct addrinfo *res, *ores;
char *firstcolon, *lastcolon, *bracecolon;
int r;
int brackets = 0;
firstcolon = strchr(tok, ':');
lastcolon = strrchr(tok, ':');
bracecolon = strstr(tok, "]:");
char *port_str = 0;
if (firstcolon && firstcolon == lastcolon) {
/* host:port or a.b.c.d:port */
*firstcolon = 0;
port_str = firstcolon + 1;
} else if (bracecolon) {
/* [ipv6addr]:port */
port_str = bracecolon + 1;
*port_str = 0;
port_str++;
}
if (port_str && !*port_str)
port_str = NULL;
if (*tok == '[' &&
tok[strlen(tok)-1] == ']') {
tok[strlen(tok)-1] = 0;
tok++;
brackets = 1;
}
//printf("name '%s' port '%s'\n", tok, port_str);
// FIPS zeroization audit 20191115: this memset is fine.
memset(&hint, 0, sizeof(hint));
hint.ai_family = AF_UNSPEC;
hint.ai_socktype = SOCK_STREAM;
hint.ai_protocol = IPPROTO_TCP;
r = getaddrinfo(tok, port_str, &hint, &res);
if (r < 0) {
printf("server name not found: %s (%s)\n", tok,
gai_strerror(r));
free(new_str);
free(buf);
return 0;
}
/* build resolved addr list */
ores = res;
while (res) {
char host[40], port[40];
getnameinfo(res->ai_addr, res->ai_addrlen,
host, sizeof(host),
port, sizeof(port),
NI_NUMERICSERV | NI_NUMERICHOST);
/*printf(" host %s port %s flags %d family %d socktype %d proto %d sanonname %s\n",
host, port,
res->ai_flags, res->ai_family, res->ai_socktype, res->ai_protocol,
res->ai_canonname);*/
if (res->ai_family == AF_INET6)
brackets = 1; /* always surround ipv6 addrs with brackets */
if (brackets)
pos = safe_cat(&new_str, &len, pos, "[");
pos = safe_cat(&new_str, &len, pos, host);
if (brackets)
pos = safe_cat(&new_str, &len, pos, "]");
if (port_str) {
pos = safe_cat(&new_str, &len, pos, ":");
pos = safe_cat(&new_str, &len, pos, port);
}
res = res->ai_next;
if (res)
pos = safe_cat(&new_str, &len, pos, ",");
}
freeaddrinfo(ores);
tok = strtok_r(NULL, delim, &saveptr);
if (tok)
pos = safe_cat(&new_str, &len, pos, ",");
}
//printf("new_str is '%s'\n", new_str);
free(buf);
return new_str;
}
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