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annotate net.c @ 1839:78abbabfd58d

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Get Android build working again and update for SDL 2.0.7 (last version to support older versions of Android)
author Michael Pavone <pavone@retrodev.com>
date Sun, 14 Apr 2019 23:37:11 -0700
parents 4f94e0f90c83
children
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1 #include <sys/types.h>
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2 #include <ifaddrs.h>
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3 #include <netinet/in.h>
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4 #include "net.h"
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5
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6 static uint8_t is_loopback(struct sockaddr_in *addr)
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7 {
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8 return (addr->sin_addr.s_addr & 0xFF) == 127;
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9 }
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10
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11 static void format_address(uint8_t *dst, struct sockaddr_in *addr)
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12 {
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13 long ip = addr->sin_addr.s_addr;
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14 dst[0] = ip;
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15 dst[1] = ip >> 8;
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16 dst[2] = ip >> 16;
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17 dst[3] = ip >> 24;
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18 }
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19
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20 uint8_t get_host_address(iface_info *out)
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21 {
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78abbabfd58d Get Android build working again and update for SDL 2.0.7 (last version to support older versions of Android)
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22 #ifdef __ANDROID__
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23 //TODO: write an implementation for Android
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24 return 0;
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25 #else
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26 struct ifaddrs *entries, *current, *localhost;
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27 if (getifaddrs(&entries)) {
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28 return 0;
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29 }
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30
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31 for (current = entries; current; current = current->ifa_next)
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32 {
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33 if (current->ifa_addr && current->ifa_addr->sa_family == AF_INET) {
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34 struct sockaddr_in *addr = (struct sockaddr_in *)current->ifa_addr;
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35 if (is_loopback(addr)) {
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36 localhost = current;
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37 } else {
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38 break;
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39 }
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40 }
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41 }
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42 if (!current && localhost) {
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43 current = localhost;
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44 }
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45 uint8_t ret = 0;
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46 if (current) {
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47 ret = 1;
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48 format_address(out->ip, (struct sockaddr_in *)current->ifa_addr);
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49 format_address(out->net_mask, (struct sockaddr_in *)current->ifa_netmask);
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50 }
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51 freeifaddrs(entries);
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52 return ret;
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53 #endif
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54 }