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annotate net.c @ 1637:95880d947257

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Fix for VRAM byte write order broke VDP FIFO testing ROM results. This change cleans up VRAM writes and fixes the regression while preserving the correct VRAM byte write order
author Michael Pavone <pavone@retrodev.com>
date Sun, 11 Nov 2018 22:39:29 -0800
parents 4f94e0f90c83
children 78abbabfd58d
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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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22 struct ifaddrs *entries, *current, *localhost;
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23 if (getifaddrs(&entries)) {
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24 return 0;
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25 }
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26
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27 for (current = entries; current; current = current->ifa_next)
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28 {
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29 if (current->ifa_addr && current->ifa_addr->sa_family == AF_INET) {
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30 struct sockaddr_in *addr = (struct sockaddr_in *)current->ifa_addr;
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31 if (is_loopback(addr)) {
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32 localhost = current;
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33 } else {
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34 break;
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35 }
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36 }
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37 }
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38 if (!current && localhost) {
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39 current = localhost;
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40 }
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41 uint8_t ret = 0;
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42 if (current) {
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43 ret = 1;
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44 format_address(out->ip, (struct sockaddr_in *)current->ifa_addr);
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45 format_address(out->net_mask, (struct sockaddr_in *)current->ifa_netmask);
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46 }
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47 freeifaddrs(entries);
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48 return ret;
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49 }