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From: R0b0t1 <r030t1 AT gmail DOT com>
Date: Sat, 21 Apr 2018 16:43:59 -0500
Message-ID: <CAAD4mYhyXBBej07EH0ai0cx11Vd4USGJk=+auBy3eOrroQFHgw@mail.gmail.com>
Subject: Unable to Accept TCP Connection
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset="UTF-8"
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The following never prints "Hello, world!"


struct sboot_state {
    struct sockaddr_in haddr;
    struct sockaddr caddr;
    socklen_t clen;
    int sfd, cfd;
} state = { 0 };

state.haddr.sin_family = AF_INET;
state.haddr.sin_port = 2200;
state.haddr.sin_addr.s_addr = INADDR_ANY;

state.sfd = socket(AF_INET, SOCK_STREAM, 0);
if (state.sfd < 0) {
  perror("socket");
  exit(1);
}

if (bind(state.sfd, (struct sockaddr *)&state.haddr,
  sizeof(state.haddr)) < 0) {
  perror("bind");
  exit(1);
}

listen(state.sfd, 5);
state.clen = sizeof(state.caddr);
state.cfd = accept(state.sfd, (struct sockaddr *)&state.caddr,
  &state.clen);
if (state.cfd < 0) {
  perror("accept");
  exit(1);
}

printf("Hello, world!\n");


The program was allowed through the Windows firewall. Any hints?
Attempting to connect with netcat immediately fails.

Cheers,
     R0b0t1

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