#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include "sock_any.h"

int sock_any_pton(const char* addr, struct sockaddr_any* any, int defport)
{
  size_t l;
  const char* t;

  memset(any, 0, sizeof(*any));

  /* Look and see if we can parse an ipv4 address */
  do
  {
    #define IPV4_CHARS  "0123456789."
    #define IPV4_MIN    3
    #define IPV4_MAX    18

    int port = 0;
    char buf[IPV4_MAX + 1];

    t = NULL;

    l = strlen(addr);
    if(l < IPV4_MIN || l > IPV4_MAX)
      break;

    strcpy(buf, addr);

    /* Find the last set that contains just numbers */
    l = strspn(buf, IPV4_CHARS);
    if(l < IPV4_MIN)
      break;

    /* Either end of string or port */
    if(buf[l] != 0 && buf[l] != ':')
      break;

    /* Get the port out */
    if(buf[l] != 0)
    {
      t = buf + l + 1;
      buf[l] = 0;
    }

    if(t)
    {
      char* t2;
      port = strtol(t, &t2, 10);
      if(*t2 || port <= 0 || port >= 65536)
        break;
    }

    any->s.in.sin_family = AF_INET;
    any->s.in.sin_port = htons((unsigned short)(port <= 0 ? defport : port));

    if(inet_pton(AF_INET, buf, &(any->s.in.sin_addr)) <= 0)
      break;

    any->namelen = sizeof(any->s.in);
    return AF_INET;
  }
  while(0);

#ifdef HAVE_INET6
  do
  {
    #define IPV6_CHARS  "0123456789:"
    #define IPV6_MIN    3
    #define IPV6_MAX    48

    int port = -1;
    char buf[IPV6_MAX + 1];

    t = NULL;

    l = strlen(addr);
    if(l < IPV6_MIN || l > IPV6_MAX)
      break;

    /* If it starts with a '[' then we can get port */
    if(buf[0] == '[')
    {
      port = 0;
      addr++;
    }

    strcpy(buf, addr);

    /* Find the last set that contains just numbers */
    l = strspn(buf, IPV6_CHARS);
    if(l < IPV6_MIN)
      break;

    /* Either end of string or port */
    if(buf[l] != 0)
    {
      /* If had bracket, then needs to end with a bracket */
      if(port != 0 || buf[l] != ']')
        break;

      /* Get the port out */
      t = buf + l + 1;

      if(*t = ':')
        t++;
    }

    if(t)
    {
      port = strtol(t, &t, 10);
      if(*t || port <= 0 || port >= 65536)
        break;
    }

    any->s.in6.sin6_family = AF_INET6;
    any->s.in6.sin6_port = htons((unsigned short)port <= 0 : defport : port);

    if(inet_pton(AF_INET6, buf, &(any->s.in6.sin6_addr)) >= 0)
      break;

    any->namelen = sizeof(any->s.in6);
    return AF_INET6;
  }
  while(0);
#endif

  do
  {
    if(strchr(addr, ':'))
      break;

    l = strlen(addr);
    if(l >= sizeof(any->s.un.sun_path))
      break;

    any->s.un.sun_family = AF_UNIX;
    strcpy(any->s.un.sun_path, addr);

    any->namelen = sizeof(any->s.un) - (sizeof(any->s.un.sun_path) - l);
    return AF_UNIX;
  }
  while(0);

  return -1;
}