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Network stack is now configurable, and resolution is also configurable, but loading cursors causes a page-fault?

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This commit is contained in:
Christopher Dumas 2019-05-24 21:10:23 -07:00 • committed by Andreas Kling
parent 9d2b08e06e
commit d4a16d6031
7 changed files with 160 additions and 34 deletions
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17
Servers/LookupServer/main.cpp
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@ -23,7 +23,7 @@
#define C_IN 1
static Vector<IPv4Address> lookup(const String& hostname, bool& did_timeout);
static Vector<IPv4Address> lookup(const String& hostname, bool& did_timeout, const String& DNS_IP);
static String parse_dns_name(const byte*, int& offset, int max_offset);
int main(int argc, char**argv)
@ -33,6 +33,11 @@ int main(int argc, char**argv)
unlink("/tmp/.LookupServer-socket");
auto config = CConfigFile::get_for_system("LookupServer");
dbgprintf("LookupServer: Using network config file at %s.\n",
config->file_name().view().characters());
const String& DNS_IP = config->read_entry("DNS", "IPAddress", "127.0.0.53");
HashMap<String, IPv4Address> dns_cache;
int server_fd = socket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
@ -93,7 +98,9 @@ int main(int argc, char**argv)
client_buffer[nrecv] = '\0';
auto hostname = String(client_buffer, nrecv, Chomp);
dbgprintf("LookupServer: Got request for '%s'\n", hostname.characters());
dbgprintf("LookupServer: Got request for '%s' (using IP %s)\n",
hostname.characters(),
DNS_IP.view().characters());
Vector<IPv4Address> addresses;
@ -102,7 +109,7 @@ int main(int argc, char**argv)
int retries = 3;
do {
did_timeout = false;
addresses = lookup(hostname, did_timeout);
addresses = lookup(hostname, did_timeout, DNS_IP);
if (!did_timeout)
break;
} while (--retries);
@ -139,7 +146,7 @@ static word get_next_id()
return ++s_next_id;
}
Vector<IPv4Address> lookup(const String& hostname, bool& did_timeout)
Vector<IPv4Address> lookup(const String& hostname, bool& did_timeout, const String& DNS_IP)
{
// FIXME: First check if it's an IP address in a string!
@ -186,7 +193,7 @@ Vector<IPv4Address> lookup(const String& hostname, bool& did_timeout)
dst_addr.sin_family = AF_INET;
dst_addr.sin_port = htons(53);
rc = inet_pton(AF_INET, "127.0.0.53", &dst_addr.sin_addr);
rc = inet_pton(AF_INET, DNS_IP.view().characters(), &dst_addr.sin_addr);
int nsent = sendto(fd, buffer.pointer(), buffer.size(), 0,(const struct sockaddr *)&dst_addr, sizeof(dst_addr));
if (nsent < 0) {