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-rw-r--r--compat/mingw.c169
1 files changed, 168 insertions, 1 deletions
diff --git a/compat/mingw.c b/compat/mingw.c
index f9d82ff..0d73f15 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -903,10 +903,129 @@ char **make_augmented_environ(const char *const *vars)
return env;
}
+/*
+ * Note, this isn't a complete replacement for getaddrinfo. It assumes
+ * that service contains a numerical port, or that it it is null. It
+ * does a simple search using gethostbyname, and returns one IPv4 host
+ * if one was found.
+ */
+static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
+ const struct addrinfo *hints,
+ struct addrinfo **res)
+{
+ struct hostent *h = gethostbyname(node);
+ struct addrinfo *ai;
+ struct sockaddr_in *sin;
+
+ if (!h)
+ return WSAGetLastError();
+
+ ai = xmalloc(sizeof(struct addrinfo));
+ *res = ai;
+ ai->ai_flags = 0;
+ ai->ai_family = AF_INET;
+ ai->ai_socktype = hints->ai_socktype;
+ switch (hints->ai_socktype) {
+ case SOCK_STREAM:
+ ai->ai_protocol = IPPROTO_TCP;
+ break;
+ case SOCK_DGRAM:
+ ai->ai_protocol = IPPROTO_UDP;
+ break;
+ default:
+ ai->ai_protocol = 0;
+ break;
+ }
+ ai->ai_addrlen = sizeof(struct sockaddr_in);
+ ai->ai_canonname = strdup(h->h_name);
+
+ sin = xmalloc(ai->ai_addrlen);
+ memset(sin, 0, ai->ai_addrlen);
+ sin->sin_family = AF_INET;
+ if (service)
+ sin->sin_port = htons(atoi(service));
+ sin->sin_addr = *(struct in_addr *)h->h_addr;
+ ai->ai_addr = (struct sockaddr *)sin;
+ ai->ai_next = 0;
+ return 0;
+}
+
+static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
+{
+ free(res->ai_canonname);
+ free(res->ai_addr);
+ free(res);
+}
+
+static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
+ char *host, DWORD hostlen,
+ char *serv, DWORD servlen, int flags)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
+ if (sa->sa_family != AF_INET)
+ return EAI_FAMILY;
+ if (!host && !serv)
+ return EAI_NONAME;
+
+ if (host && hostlen > 0) {
+ struct hostent *ent = NULL;
+ if (!(flags & NI_NUMERICHOST))
+ ent = gethostbyaddr((const char *)&sin->sin_addr,
+ sizeof(sin->sin_addr), AF_INET);
+
+ if (ent)
+ snprintf(host, hostlen, "%s", ent->h_name);
+ else if (flags & NI_NAMEREQD)
+ return EAI_NONAME;
+ else
+ snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
+ }
+
+ if (serv && servlen > 0) {
+ struct servent *ent = NULL;
+ if (!(flags & NI_NUMERICSERV))
+ ent = getservbyport(sin->sin_port,
+ flags & NI_DGRAM ? "udp" : "tcp");
+
+ if (ent)
+ snprintf(serv, servlen, "%s", ent->s_name);
+ else
+ snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
+ }
+
+ return 0;
+}
+
+static HMODULE ipv6_dll = NULL;
+static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
+static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
+ const struct addrinfo *hints,
+ struct addrinfo **res);
+static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
+ char *host, DWORD hostlen,
+ char *serv, DWORD servlen, int flags);
+/*
+ * gai_strerror is an inline function in the ws2tcpip.h header, so we
+ * don't need to try to load that one dynamically.
+ */
+
+static void socket_cleanup(void)
+{
+ WSACleanup();
+ if (ipv6_dll)
+ FreeLibrary(ipv6_dll);
+ ipv6_dll = NULL;
+ ipv6_freeaddrinfo = freeaddrinfo_stub;
+ ipv6_getaddrinfo = getaddrinfo_stub;
+ ipv6_getnameinfo = getnameinfo_stub;
+}
+
static void ensure_socket_initialization(void)
{
WSADATA wsa;
static int initialized = 0;
+ const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
+ const char **name;
if (initialized)
return;
@@ -914,7 +1033,35 @@ static void ensure_socket_initialization(void)
if (WSAStartup(MAKEWORD(2,2), &wsa))
die("unable to initialize winsock subsystem, error %d",
WSAGetLastError());
- atexit((void(*)(void)) WSACleanup);
+
+ for (name = libraries; *name; name++) {
+ ipv6_dll = LoadLibrary(*name);
+ if (!ipv6_dll)
+ continue;
+
+ ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
+ GetProcAddress(ipv6_dll, "freeaddrinfo");
+ ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
+ const struct addrinfo *,
+ struct addrinfo **))
+ GetProcAddress(ipv6_dll, "getaddrinfo");
+ ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
+ socklen_t, char *, DWORD,
+ char *, DWORD, int))
+ GetProcAddress(ipv6_dll, "getnameinfo");
+ if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
+ FreeLibrary(ipv6_dll);
+ ipv6_dll = NULL;
+ } else
+ break;
+ }
+ if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
+ ipv6_freeaddrinfo = freeaddrinfo_stub;
+ ipv6_getaddrinfo = getaddrinfo_stub;
+ ipv6_getnameinfo = getnameinfo_stub;
+ }
+
+ atexit(socket_cleanup);
initialized = 1;
}
@@ -925,6 +1072,26 @@ struct hostent *mingw_gethostbyname(const char *host)
return gethostbyname(host);
}
+void mingw_freeaddrinfo(struct addrinfo *res)
+{
+ ipv6_freeaddrinfo(res);
+}
+
+int mingw_getaddrinfo(const char *node, const char *service,
+ const struct addrinfo *hints, struct addrinfo **res)
+{
+ ensure_socket_initialization();
+ return ipv6_getaddrinfo(node, service, hints, res);
+}
+
+int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
+ char *host, DWORD hostlen, char *serv, DWORD servlen,
+ int flags)
+{
+ ensure_socket_initialization();
+ return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
+}
+
int mingw_socket(int domain, int type, int protocol)
{
int sockfd;