From 314b92c0e37c6896ecabc391a4e1594fc86c2fdb Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 28 Oct 2018 02:15:56 +0200
Subject: Fix build for mingw

---
 src/IpAddress.cpp | 172 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 170 insertions(+), 2 deletions(-)

(limited to 'src/IpAddress.cpp')

diff --git a/src/IpAddress.cpp b/src/IpAddress.cpp
index 58ed661..75e4348 100644
--- a/src/IpAddress.cpp
+++ b/src/IpAddress.cpp
@@ -1,6 +1,171 @@
 #include "../include/sibs/IpAddress.hpp"
 #include <cstring>
 
+#if OS_FAMILY == OS_FAMILY_WINDOWS
+// Source: https://stackoverflow.com/questions/15370033/how-to-use-inet-pton-with-the-mingw-compiler
+#define NS_INADDRSZ  4
+#define NS_IN6ADDRSZ 16
+#define NS_INT16SZ   2
+
+int inet_pton(int af, const char *src, void *dst)
+{
+    switch (af)
+    {
+    case AF_INET:
+        return inet_pton4(src, dst);
+    case AF_INET6:
+        return inet_pton6(src, dst);
+    default:
+        return -1;
+    }
+}
+
+int inet_pton4(const char *src, void *_dst)
+{
+    char *dst = (char*)_dst;
+    uint8_t tmp[NS_INADDRSZ], *tp;
+
+    int saw_digit = 0;
+    int octets = 0;
+    *(tp = tmp) = 0;
+
+    int ch;
+    while ((ch = *src++) != '\0')
+    {
+        if (ch >= '0' && ch <= '9')
+        {
+            uint32_t n = *tp * 10 + (ch - '0');
+
+            if (saw_digit && *tp == 0)
+                return 0;
+
+            if (n > 255)
+                return 0;
+
+            *tp = n;
+            if (!saw_digit)
+            {
+                if (++octets > 4)
+                    return 0;
+                saw_digit = 1;
+            }
+        }
+        else if (ch == '.' && saw_digit)
+        {
+            if (octets == 4)
+                return 0;
+            *++tp = 0;
+            saw_digit = 0;
+        }
+        else
+            return 0;
+    }
+    if (octets < 4)
+        return 0;
+
+    memcpy(dst, tmp, NS_INADDRSZ);
+
+    return 1;
+}
+
+int inet_pton6(const char *src, void *_dst)
+{
+    char *dst = (char*)_dst;
+    static const char xdigits[] = "0123456789abcdef";
+    uint8_t tmp[NS_IN6ADDRSZ];
+
+    uint8_t *tp = (uint8_t*) memset(tmp, '\0', NS_IN6ADDRSZ);
+    uint8_t *endp = tp + NS_IN6ADDRSZ;
+    uint8_t *colonp = NULL;
+
+    /* Leading :: requires some special handling. */
+    if (*src == ':')
+    {
+        if (*++src != ':')
+            return 0;
+    }
+
+    const char *curtok = src;
+    int saw_xdigit = 0;
+    uint32_t val = 0;
+    int ch;
+    while ((ch = tolower(*src++)) != '\0')
+    {
+        const char *pch = strchr(xdigits, ch);
+        if (pch != NULL)
+        {
+            val <<= 4;
+            val |= (pch - xdigits);
+            if (val > 0xffff)
+                return 0;
+            saw_xdigit = 1;
+            continue;
+        }
+        if (ch == ':')
+        {
+            curtok = src;
+            if (!saw_xdigit)
+            {
+                if (colonp)
+                    return 0;
+                colonp = tp;
+                continue;
+            }
+            else if (*src == '\0')
+            {
+                return 0;
+            }
+            if (tp + NS_INT16SZ > endp)
+                return 0;
+            *tp++ = (uint8_t) (val >> 8) & 0xff;
+            *tp++ = (uint8_t) val & 0xff;
+            saw_xdigit = 0;
+            val = 0;
+            continue;
+        }
+        if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+                inet_pton4(curtok, (char*) tp) > 0)
+        {
+            tp += NS_INADDRSZ;
+            saw_xdigit = 0;
+            break; /* '\0' was seen by inet_pton4(). */
+        }
+        return 0;
+    }
+    if (saw_xdigit)
+    {
+        if (tp + NS_INT16SZ > endp)
+            return 0;
+        *tp++ = (uint8_t) (val >> 8) & 0xff;
+        *tp++ = (uint8_t) val & 0xff;
+    }
+    if (colonp != NULL)
+    {
+        /*
+         * Since some memmove()'s erroneously fail to handle
+         * overlapping regions, we'll do the shift by hand.
+         */
+        const int n = tp - colonp;
+
+        if (tp == endp)
+            return 0;
+
+        for (int i = 1; i <= n; i++)
+        {
+            endp[-i] = colonp[n - i];
+            colonp[n - i] = 0;
+        }
+        tp = endp;
+    }
+    if (tp != endp)
+        return 0;
+
+    memcpy(dst, tmp, NS_IN6ADDRSZ);
+
+    return 1;
+}
+#endif
+
 namespace sibs
 {
     Ipv4::Ipv4() : Ipv4(nullptr, 0)
@@ -44,8 +209,11 @@ namespace sibs
     std::string Ipv4::getAddress() const
     {
         std::string result;
-        result.resize(INET_ADDRSTRLEN);
-        inet_ntop(AF_INET, &address.sin_addr, &result[0], INET_ADDRSTRLEN);
+        const int addrLen = sizeof(address);
+        char host[NI_MAXHOST];
+        char service[NI_MAXSERV];
+        getnameinfo((sockaddr *)&address, addrLen, host, sizeof(host), service, sizeof(service), NI_NUMERICHOST | NI_NUMERICSERV);
+        result += host;
         return result;
     }
     
-- 
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