Implemented sceNetInetNtop in RE (#3003)

* implemented sceNetInetNtop in RE

* some logging

* added freebsd_inet_ntop4

* freebsd_inet_ntop6

* fixups based on reviews

* review fixes

src/core/libraries/network/net.cpp

@@ -955,16 +955,148 @@ u16 PS4_SYSV_ABI sceNetHtons(u16 host16) {
     return htons(host16);
 }
 
-const char* PS4_SYSV_ABI sceNetInetNtop(int af, const void* src, char* dst, u32 size) {
 #ifdef WIN32
-    const char* res = InetNtopA(af, src, dst, size);
-#else
-    const char* res = inet_ntop(af, src, dst, size);
-#endif
-    if (res == nullptr) {
-        UNREACHABLE();
+// there isn't a strlcpy function in windows so implement one
+u64 strlcpy(char* dst, const char* src, u64 size) {
+    u64 src_len = strlen(src);
+
+    if (size > 0) {
+        u64 copy_len = (src_len >= size) ? (size - 1) : src_len;
+        memcpy(dst, src, copy_len);
+        dst[copy_len] = '\0';
     }
-    return dst;
+
+    return src_len;
+}
+
+#endif
+
+const char* freebsd_inet_ntop4(const char* src, char* dst, u64 size) {
+    static const char fmt[] = "%u.%u.%u.%u";
+    char tmp[sizeof "255.255.255.255"];
+    int l;
+
+    l = snprintf(tmp, sizeof(tmp), fmt, src[0], src[1], src[2], src[3]);
+    if (l <= 0 || (socklen_t)l >= size) {
+        return nullptr;
+    }
+    strlcpy(dst, tmp, size);
+    return (dst);
+}
+
+const char* freebsd_inet_ntop6(const char* src, char* dst, u64 size) {
+    /*
+     * Note that int32_t and int16_t need only be "at least" large enough
+     * to contain a value of the specified size.  On some systems, like
+     * Crays, there is no such thing as an integer variable with 16 bits.
+     * Keep this in mind if you think this function should have been coded
+     * to use pointer overlays.  All the world's not a VAX.
+     */
+    char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp;
+    struct {
+        int base, len;
+    } best, cur;
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ 2
+    u_int words[NS_IN6ADDRSZ / NS_INT16SZ];
+    int i;
+
+    /*
+     * Preprocess:
+     *	Copy the input (bytewise) array into a wordwise array.
+     *	Find the longest run of 0x00's in src[] for :: shorthanding.
+     */
+    memset(words, '\0', sizeof words);
+    for (i = 0; i < NS_IN6ADDRSZ; i++)
+        words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
+    best.base = -1;
+    best.len = 0;
+    cur.base = -1;
+    cur.len = 0;
+    for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
+        if (words[i] == 0) {
+            if (cur.base == -1)
+                cur.base = i, cur.len = 1;
+            else
+                cur.len++;
+        } else {
+            if (cur.base != -1) {
+                if (best.base == -1 || cur.len > best.len)
+                    best = cur;
+                cur.base = -1;
+            }
+        }
+    }
+    if (cur.base != -1) {
+        if (best.base == -1 || cur.len > best.len)
+            best = cur;
+    }
+    if (best.base != -1 && best.len < 2)
+        best.base = -1;
+
+    /*
+     * Format the result.
+     */
+    tp = tmp;
+    for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
+        /* Are we inside the best run of 0x00's? */
+        if (best.base != -1 && i >= best.base && i < (best.base + best.len)) {
+            if (i == best.base)
+                *tp++ = ':';
+            continue;
+        }
+        /* Are we following an initial run of 0x00s or any real hex? */
+        if (i != 0)
+            *tp++ = ':';
+        /* Is this address an encapsulated IPv4? */
+        if (i == 6 && best.base == 0 &&
+            (best.len == 6 || (best.len == 7 && words[7] != 0x0001) ||
+             (best.len == 5 && words[5] == 0xffff))) {
+            if (!freebsd_inet_ntop4(src + 12, tp, sizeof tmp - (tp - tmp)))
+                return nullptr;
+            tp += strlen(tp);
+            break;
+        }
+        tp += sprintf(tp, "%x", words[i]);
+    }
+    /* Was it a trailing run of 0x00's? */
+    if (best.base != -1 && (best.base + best.len) == (NS_IN6ADDRSZ / NS_INT16SZ))
+        *tp++ = ':';
+    *tp++ = '\0';
+
+    /*
+     * Check for overflow, copy, and we're done.
+     */
+    if ((u64)(tp - tmp) > size) {
+        return nullptr;
+    }
+    strcpy(dst, tmp);
+    return (dst);
+}
+const char* PS4_SYSV_ABI sceNetInetNtop(int af, const void* src, char* dst, u32 size) {
+    if (!(src && dst)) {
+        *sceNetErrnoLoc() = ORBIS_NET_ENOSPC;
+        LOG_ERROR(Lib_Net, "returned ORBIS_NET_ENOSPC");
+        return nullptr;
+    }
+    const char* returnvalue = nullptr;
+    switch (af) {
+    case ORBIS_NET_AF_INET:
+        returnvalue = freebsd_inet_ntop4((const char*)src, dst, size);
+        break;
+    case ORBIS_NET_AF_INET6:
+        returnvalue = freebsd_inet_ntop6((const char*)src, dst, size);
+        break;
+    default:
+        *sceNetErrnoLoc() = ORBIS_NET_EAFNOSUPPORT;
+        LOG_ERROR(Lib_Net, "returned ORBIS_NET_EAFNOSUPPORT");
+        return nullptr;
+    }
+    if (returnvalue == nullptr) {
+        *sceNetErrnoLoc() = ORBIS_NET_ENOSPC;
+        LOG_ERROR(Lib_Net, "returned ORBIS_NET_ENOSPC");
+    }
+    return returnvalue;
 }
 
 int PS4_SYSV_ABI sceNetInetNtopWithScopeId() {

src/core/libraries/network/net.h

@@ -20,6 +20,10 @@ class SymbolsResolver;
 
 namespace Libraries::Net {
 
+enum OrbisNetFamily : u32 {
+    ORBIS_NET_AF_INET = 2,
+    ORBIS_NET_AF_INET6 = 28,
+};
 enum OrbisNetSocketType : u32 {
     ORBIS_NET_SOCK_STREAM = 1,
     ORBIS_NET_SOCK_DGRAM = 2,