(svn r13988) -Codechange: move the to IP resolving functions to a separate file.

2 files changed, 259 insertions, 0 deletions

diff --git a/src/network/core/host.cpp b/src/network/core/host.cpp
new file mode 100644
index 000000000..e1469e069
--- /dev/null
+++ b/src/network/core/host.cpp
@@ -0,0 +1,247 @@
+/* $Id$ */
+
+/** @file host.cpp Functions related to getting host specific data (IPs). */
+
+#ifdef ENABLE_NETWORK
+
+#include "../../stdafx.h"
+#include "../../debug.h"
+#include "os_abstraction.h"
+
+/**
+ * Internal implementation for finding the broadcast IPs.
+ * This function is implemented multiple times for multiple targets.
+ * @param broadcast the list of broadcasts to write into.
+ * @param limit     the maximum number of items to add.
+ */
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit);
+
+#if defined(PSP)
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // PSP implementation
+{
+	return 0;
+}
+
+#elif defined(BEOS_NET_SERVER) /* doesn't have neither getifaddrs or net/if.h */
+/* Based on Andrew Bachmann's netstat+.c. Big thanks to him! */
+int _netstat(int fd, char **output, int verbose);
+
+int seek_past_header(char **pos, const char *header)
+{
+	char *new_pos = strstr(*pos, header);
+	if (new_pos == 0) {
+		return B_ERROR;
+	}
+	*pos += strlen(header) + new_pos - *pos + 1;
+	return B_OK;
+}
+
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // BEOS implementation
+{
+	int sock = socket(AF_INET, SOCK_DGRAM, 0);
+
+	if (sock < 0) {
+		DEBUG(net, 0, "[core] error creating socket");
+		return;
+	}
+
+	char *output_pointer = NULL;
+	int output_length = _netstat(sock, &output_pointer, 1);
+	if (output_length < 0) {
+		DEBUG(net, 0, "[core] error running _netstat");
+		return;
+	}
+
+	int index;
+	char **output = &output_pointer;
+	if (seek_past_header(output, "IP Interfaces:") == B_OK) {
+		while (index != limit) {
+
+			uint32 n, fields, read;
+			uint8 i1, i2, i3, i4, j1, j2, j3, j4;
+			struct in_addr inaddr;
+			uint32 ip;
+			uint32 netmask;
+
+			fields = sscanf(*output, "%u: %hhu.%hhu.%hhu.%hhu, netmask %hhu.%hhu.%hhu.%hhu%n",
+												&n, &i1, &i2, &i3, &i4, &j1, &j2, &j3, &j4, &read);
+			read += 1;
+			if (fields != 9) {
+				break;
+			}
+
+			ip      = (uint32)i1 << 24 | (uint32)i2 << 16 | (uint32)i3 << 8 | (uint32)i4;
+			netmask = (uint32)j1 << 24 | (uint32)j2 << 16 | (uint32)j3 << 8 | (uint32)j4;
+
+			if (ip != INADDR_LOOPBACK && ip != INADDR_ANY) {
+				inaddr.s_addr = htonl(ip | ~netmask);
+				broadcast[index] = inaddr.s_addr;
+				index++;
+			}
+			if (read < 0) {
+				break;
+			}
+			*output += read;
+		}
+		closesocket(sock);
+	}
+
+	return index;
+}
+
+#elif defined(HAVE_GETIFADDRS)
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // GETIFADDRS implementation
+{
+	struct ifaddrs *ifap, *ifa;
+
+	if (getifaddrs(&ifap) != 0) return 0;
+
+	int index = 0;
+	for (ifa = ifap; ifa != NULL && index != limit; ifa = ifa->ifa_next) {
+		if (!(ifa->ifa_flags & IFF_BROADCAST)) continue;
+		if (ifa->ifa_broadaddr == NULL) continue;
+		if (ifa->ifa_broadaddr->sa_family != AF_INET) continue;
+
+		broadcast[index] = ((struct sockaddr_in*)ifa->ifa_broadaddr)->sin_addr.s_addr;
+		index++;
+	}
+	freeifaddrs(ifap);
+
+	return index;
+}
+
+#elif defined(WIN32)
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // Win32 implementation
+{
+	SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock == INVALID_SOCKET) return 0;
+
+	DWORD len = 0;
+	INTERFACE_INFO ifo[MAX_INTERFACES];
+	memset(&ifo[0], 0, sizeof(ifo));
+	if ((WSAIoctl(sock, SIO_GET_INTERFACE_LIST, NULL, 0, &ifo[0], sizeof(ifo), &len, NULL, NULL)) != 0) {
+		closesocket(sock);
+		return;
+	}
+
+	int index = 0;
+	for (int j = 0; j < len / sizeof(*ifo) && index != limit; j++) {
+		if (ifo[j].iiFlags & IFF_LOOPBACK) continue;
+		if (!(ifo[j].iiFlags & IFF_BROADCAST)) continue;
+
+		/* iiBroadcast is unusable, because it always seems to be set to 255.255.255.255. */
+		broadcast[index++] = ifo[j].iiAddress.AddressIn.sin_addr.s_addr | ~ifo[j].iiNetmask.AddressIn.sin_addr.s_addr;
+	}
+
+	closesocket(sock);
+	return index;
+}
+
+#else /* not HAVE_GETIFADDRS */
+static int NetworkFindBroadcastIPsInternal(uint32 *broadcast, int limit) // !GETIFADDRS implementation
+{
+	SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock == INVALID_SOCKET) return 0;
+
+	char buf[4 * 1024]; // Arbitrary buffer size
+	struct ifconf ifconf;
+
+	ifconf.ifc_len = sizeof(buf);
+	ifconf.ifc_buf = buf;
+	if (ioctl(sock, SIOCGIFCONF, &ifconf) == -1) {
+		closesocket(sock);
+		return 0;
+	}
+
+	const char *buf_end = buf + ifconf.ifc_len;
+	int index;
+	for (const char *p = buf; p < buf_end && index != 0;) {
+		const struct ifreq* req = (const struct ifreq*)p;
+
+		if (req->ifr_addr.sa_family == AF_INET) {
+			struct ifreq r;
+
+			strncpy(r.ifr_name, req->ifr_name, lengthof(r.ifr_name));
+			if (ioctl(sock, SIOCGIFFLAGS, &r) != -1 &&
+					r.ifr_flags & IFF_BROADCAST &&
+					ioctl(sock, SIOCGIFBRDADDR, &r) != -1) {
+				broadcast[index++] = ((struct sockaddr_in*)&r.ifr_broadaddr)->sin_addr.s_addr;
+			}
+		}
+
+		p += sizeof(struct ifreq);
+#if defined(AF_LINK) && !defined(SUNOS)
+		p += req->ifr_addr.sa_len - sizeof(struct sockaddr);
+#endif
+	}
+
+	closesocket(sock);
+}
+#endif /* all NetworkFindBroadcastIPsInternals */
+
+/**
+ * Find the IPs to broadcast.
+ * @param broadcast the list of broadcasts to write into.
+ * @param limit     the maximum number of items to add.
+ */
+void NetworkFindBroadcastIPs(uint32 *broadcast, int limit)
+{
+	int count = NetworkFindBroadcastIPsInternal(broadcast, limit);
+
+	/* Make sure the list is terminated. */
+	broadcast[count] = 0;
+
+	/* Now display to the debug all the detected ips */
+	DEBUG(net, 3, "Detected broadcast addresses:");
+	for (int i = 0; broadcast[i] != 0; i++) {
+		DEBUG(net, 3, "%d) %s", i, inet_ntoa(*(struct in_addr *)&broadcast[i])); //inet_ntoa(inaddr));
+	}
+}
+
+
+/**
+ * Resolve a hostname to an ip.
+ * @param hsotname the hostname to resolve
+ * @return the IP belonging to that hostname, or 0 on failure.
+ */
+uint32 NetworkResolveHost(const char *hostname)
+{
+	/* Is this an IP address? */
+	in_addr_t ip = inet_addr(hostname);
+
+	if (ip != INADDR_NONE) return ip;
+
+	/* No, try to resolve the name */
+	struct in_addr addr;
+#if !defined(PSP)
+	struct hostent *he = gethostbyname(hostname);
+	if (he == NULL) {
+		DEBUG(net, 0, "[NET] Cannot resolve %s", hostname);
+		return 0;
+	}
+	addr = *(struct in_addr *)he->h_addr_list[0];
+#else
+	int rid = -1;
+	char buf[1024];
+
+	/* Create a resolver */
+	if (sceNetResolverCreate(&rid, buf, sizeof(buf)) < 0) {
+		DEBUG(net, 0, "[NET] Error connecting resolver");
+		return 0;
+	}
+
+	/* Try to resolve the name */
+	if (sceNetResolverStartNtoA(rid, hostname, &addr, 2, 3) < 0) {
+		DEBUG(net, 0, "[NET] Cannot resolve %s", hostname);
+		sceNetResolverDelete(rid);
+		return 0;
+	}
+	sceNetResolverDelete(rid);
+#endif /* PSP */
+
+	DEBUG(net, 1, "[NET] Resolved %s to %s", hostname, inet_ntoa(addr));
+	ip = addr.s_addr;
+	return ip;
+}
+
+#endif /* ENABLE_NETWORK */
diff --git a/src/network/core/host.h b/src/network/core/host.h
new file mode 100644
index 000000000..9735cce84
--- /dev/null
+++ b/src/network/core/host.h
@@ -0,0 +1,12 @@
+/* $Id$ */
+
+/**
+ * @file host.h Resolving of hostnames/IPs
+ */
+
+#ifndef NETWORK_CORE_HOST_H
+
+void NetworkFindBroadcastIPs(uint32 *broadcast, int limit);
+uint32 NetworkResolveHost(const char *hostname);
+
+#endif /* NETWORK_CORE_HOST_H */