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Fix crash from DNS resolution failures.

Browse source 
Additionally attempt to work around ISPs with dodgy DNS services.
Add tls_provider cvar, for builds using both gnutls and openssl.


git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5753 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2020-08-26 09:30:51 +00:00
parent 79d851d6ea
commit 64fb49e908
1 changed files with 37 additions and 12 deletions
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49
engine/common/net_wins.c
View file

@ -125,6 +125,7 @@ static cvar_t net_dns_ipv6 = CVARD("net_dns_ipv6", "1", "If 0, disables dns
cvar_t net_enabled = CVARD("net_enabled", "1", "If 0, disables all network access, including name resolution and socket creation. Does not affect loopback/internal connections.");
#if defined(HAVE_SSL)
cvar_t tls_ignorecertificateerrors = CVARFD("tls_ignorecertificateerrors", "0", CVAR_NOTFROMSERVER|CVAR_NOSAVE|CVAR_NOUNSAFEEXPAND|CVAR_NOSET, "This should NEVER be set to 1!");
static cvar_t tls_provider = CVARFD("tls_provider", "0", CVAR_NOTFROMSERVER, "Controls which TLS provider to use.\n0: Auto.\n1: GNUTLS\n2: OpenSSL\n3: SSPI");
#endif
#if defined(TCPCONNECT) && (defined(HAVE_SERVER) || defined(HAVE_HTTPSV))
#ifdef HAVE_SERVER
@ -1081,7 +1082,27 @@ size_t NET_StringToSockaddr2 (const char *s, int defaultport, netadrtype_t afhin
if (!strncmp(site, oldprefix, strlen(oldprefix)))
{
if (!strcmp(s+8,site+strlen(oldprefix)))
{
#ifdef HAVE_IPV4
struct sockaddr_in *a = (struct sockaddr_in*)sadr;
qbyte *ip = (qbyte*)&a->sin_addr;
memset (a, 0, sizeof(*sadr));
a->sin_family = AF_INET;
ip[0] = 213;
ip[1] = 219;
ip[2] = 36;
ip[3] = 248;
a->sin_port = htons(defaultport);
if (addrsize)
*addrsize = sizeof(*a);
if (addrfamily)
*addrfamily = AF_INET;
return 1;
#else
s += 8;
#endif
}
}
}
#endif
@ -2274,6 +2295,9 @@ vfsfile_t *FS_OpenSSL(const char *peername, vfsfile_t *source, qboolean isserver
vfsfile_t *f = NULL;
char hostname[MAX_OSPATH];
if (!source)
return NULL; //can happen if socket() fails.
if (peername)
{
//clean up the name, stripping any port or other weirdness.
@ -2296,15 +2320,15 @@ vfsfile_t *FS_OpenSSL(const char *peername, vfsfile_t *source, qboolean isserver
*hostname = 0;
#ifdef HAVE_GNUTLS
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==1))
f = GNUTLS_OpenVFS(hostname, source, isserver);
#endif
#ifdef HAVE_OPENSSL
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==2))
f = OSSL_OpenVFS(hostname, source, isserver);
#endif
#ifdef HAVE_WINSSPI
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==3))
f = SSPI_OpenVFS(hostname, source, isserver);
#endif
if (!f) //it all failed.
@ -2817,15 +2841,15 @@ const dtlsfuncs_t *DTLS_InitServer(void)
{
const dtlsfuncs_t *f = NULL;
#ifdef HAVE_GNUTLS
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==1))
f = GNUDTLS_InitServer();
#endif
#ifdef HAVE_OPENSSL
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==2))
f = OSSL_InitServer();
#endif
#ifdef HAVE_WINSSPI
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==3))
f = SSPI_DTLS_InitServer();
#endif
return f;
@ -2833,17 +2857,17 @@ const dtlsfuncs_t *DTLS_InitServer(void)
const dtlsfuncs_t *DTLS_InitClient(void)
{
const dtlsfuncs_t *f = NULL;
#ifdef HAVE_WINSSPI
if (!f)
f = SSPI_DTLS_InitClient();
#endif
#ifdef HAVE_GNUTLS
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==1))
f = GNUDTLS_InitClient();
#endif
#ifdef HAVE_OPENSSL
if (!f)
if (!f && (!tls_provider.ival || tls_provider.ival==2))
f = OSSL_InitClient();
#endif
#ifdef HAVE_WINSSPI
if (!f && (!tls_provider.ival || tls_provider.ival==3))
f = SSPI_DTLS_InitClient();
#endif
return f;
}
@ -8455,6 +8479,7 @@ void NET_Init (void)
#if defined(HAVE_SSL)
Cvar_Register(&net_enable_tls, "networking");
Cvar_Register(&tls_ignorecertificateerrors, "networking");
Cvar_Register(&tls_provider, "networking");
#endif
#ifdef HAVE_HTTPSV
Cvar_Register(&net_enable_http, "networking");