/src/tor/src/trunnel/socks5.c

Source (jump to first uncovered line)
/* socks5.c -- generated by Trunnel v1.5.3.
 * https://gitweb.torproject.org/trunnel.git
 * You probably shouldn't edit this file.
 */
#include <stdlib.h>
#include "trunnel-impl.h"

#include "socks5.h"

#define TRUNNEL_SET_ERROR_CODE(obj) \
  do {                              \
    (obj)->trunnel_error_code_ = 1; \
  } while (0)

#if defined(__COVERITY__) || defined(__clang_analyzer__)
/* If we're running a static analysis tool, we don't want it to complain
 * that some of our remaining-bytes checks are dead-code. */
int socks_deadcode_dummy__ = 0;
#define OR_DEADCODE_DUMMY || socks_deadcode_dummy__
#else
#define OR_DEADCODE_DUMMY
#endif

#define CHECK_REMAINING(nbytes, label)                           \
  do {                                                           \
    if (remaining < (nbytes) OR_DEADCODE_DUMMY) {                \
      goto label;                                                \
    }                                                            \
  } while (0)

domainname_t *
domainname_new(void)
{
  domainname_t *val = trunnel_calloc(1, sizeof(domainname_t));
  if (NULL == val)
    return NULL;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
domainname_clear(domainname_t *obj)
{
  (void) obj;
  TRUNNEL_DYNARRAY_WIPE(&obj->name);
  TRUNNEL_DYNARRAY_CLEAR(&obj->name);
}

void
domainname_free(domainname_t *obj)
{
  if (obj == NULL)
    return;
  domainname_clear(obj);
  trunnel_memwipe(obj, sizeof(domainname_t));
  trunnel_free_(obj);
}

uint8_t
domainname_get_len(const domainname_t *inp)
{
  return inp->len;
}
int
domainname_set_len(domainname_t *inp, uint8_t val)
{
  inp->len = val;
  return 0;
}
size_t
domainname_getlen_name(const domainname_t *inp)
{
  return TRUNNEL_DYNARRAY_LEN(&inp->name);
}

char
domainname_get_name(domainname_t *inp, size_t idx)
{
  return TRUNNEL_DYNARRAY_GET(&inp->name, idx);
}

char
domainname_getconst_name(const domainname_t *inp, size_t idx)
{
  return domainname_get_name((domainname_t*)inp, idx);
}
int
domainname_set_name(domainname_t *inp, size_t idx, char elt)
{
  TRUNNEL_DYNARRAY_SET(&inp->name, idx, elt);
  return 0;
}
int
domainname_add_name(domainname_t *inp, char elt)
{
#if SIZE_MAX >= UINT8_MAX
  if (inp->name.n_ == UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  TRUNNEL_DYNARRAY_ADD(char, &inp->name, elt, {});
  return 0;
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}

char *
domainname_getarray_name(domainname_t *inp)
{
  return inp->name.elts_;
}
const char  *
domainname_getconstarray_name(const domainname_t *inp)
{
  return (const char  *)domainname_getarray_name((domainname_t*)inp);
}
int
domainname_setlen_name(domainname_t *inp, size_t newlen)
{
#if UINT8_MAX < SIZE_MAX
  if (newlen > UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  return trunnel_string_setlen(&inp->name, newlen,
            &inp->trunnel_error_code_);
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}
const char *
domainname_getstr_name(domainname_t *inp)
{
  return trunnel_string_getstr(&inp->name);
}
int
domainname_setstr0_name(domainname_t *inp, const char *val, size_t len)
{
#if UINT8_MAX < SIZE_MAX
  if (len > UINT8_MAX) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
#endif
  return trunnel_string_setstr0(&inp->name, val, len, &inp->trunnel_error_code_);
}
int
domainname_setstr_name(domainname_t *inp, const char *val)
{
  return domainname_setstr0_name(inp, val, strlen(val));
}
const char *
domainname_check(const domainname_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (TRUNNEL_DYNARRAY_LEN(&obj->name) != obj->len)
    return "Length mismatch for name";
  return NULL;
}

ssize_t
domainname_encoded_len(const domainname_t *obj)
{
  ssize_t result = 0;

  if (NULL != domainname_check(obj))
     return -1;


  /* Length of u8 len */
  result += 1;

  /* Length of char name[len] */
  result += TRUNNEL_DYNARRAY_LEN(&obj->name);
  return result;
}
int
domainname_clear_errors(domainname_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
domainname_encode(uint8_t *output, const size_t avail, const domainname_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = domainname_encoded_len(obj);
#endif

  if (NULL != (msg = domainname_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 len */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->len));
  written += 1; ptr += 1;

  /* Encode char name[len] */
  {
    size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->name);
    trunnel_assert(obj->len == elt_len);
    trunnel_assert(written <= avail);
    if (avail - written < elt_len)
      goto truncated;
    if (elt_len)
      memcpy(ptr, obj->name.elts_, elt_len);
    written += elt_len; ptr += elt_len;
  }


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As domainname_parse(), but do not allocate the output object.
 */
static ssize_t
domainname_parse_into(domainname_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 len */
  CHECK_REMAINING(1, truncated);
  obj->len = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse char name[len] */
  CHECK_REMAINING(obj->len, truncated);
  if (domainname_setstr0_name(obj, (const char*)ptr, obj->len))
    goto fail;
  ptr += obj->len; remaining -= obj->len;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
domainname_parse(domainname_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = domainname_new();
  if (NULL == *output)
    return -1;
  result = domainname_parse_into(*output, input, len_in);
  if (result < 0) {
    domainname_free(*output);
    *output = NULL;
  }
  return result;
}
socks4_client_request_t *
socks4_client_request_new(void)
{
  socks4_client_request_t *val = trunnel_calloc(1, sizeof(socks4_client_request_t));
  if (NULL == val)
    return NULL;
  val->version = 4;
  val->command = CMD_BIND;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks4_client_request_clear(socks4_client_request_t *obj)
{
  (void) obj;
  trunnel_wipestr(obj->username);
  trunnel_free(obj->username);
  trunnel_wipestr(obj->socks4a_addr_hostname);
  trunnel_free(obj->socks4a_addr_hostname);
}

void
socks4_client_request_free(socks4_client_request_t *obj)
{
  if (obj == NULL)
    return;
  socks4_client_request_clear(obj);
  trunnel_memwipe(obj, sizeof(socks4_client_request_t));
  trunnel_free_(obj);
}

uint8_t
socks4_client_request_get_version(const socks4_client_request_t *inp)
{
  return inp->version;
}
int
socks4_client_request_set_version(socks4_client_request_t *inp, uint8_t val)
{
  if (! ((val == 4))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks4_client_request_get_command(const socks4_client_request_t *inp)
{
  return inp->command;
}
int
socks4_client_request_set_command(socks4_client_request_t *inp, uint8_t val)
{
  if (! ((val == CMD_BIND || val == CMD_CONNECT || val == CMD_RESOLVE || val == CMD_RESOLVE_PTR))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->command = val;
  return 0;
}
uint16_t
socks4_client_request_get_port(const socks4_client_request_t *inp)
{
  return inp->port;
}
int
socks4_client_request_set_port(socks4_client_request_t *inp, uint16_t val)
{
  inp->port = val;
  return 0;
}
uint32_t
socks4_client_request_get_addr(const socks4_client_request_t *inp)
{
  return inp->addr;
}
int
socks4_client_request_set_addr(socks4_client_request_t *inp, uint32_t val)
{
  inp->addr = val;
  return 0;
}
const char *
socks4_client_request_get_username(const socks4_client_request_t *inp)
{
  return inp->username;
}
int
socks4_client_request_set_username(socks4_client_request_t *inp, const char *val)
{
  trunnel_free(inp->username);
  if (NULL == (inp->username = trunnel_strdup(val))) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  return 0;
}
const char *
socks4_client_request_get_socks4a_addr_hostname(const socks4_client_request_t *inp)
{
  return inp->socks4a_addr_hostname;
}
int
socks4_client_request_set_socks4a_addr_hostname(socks4_client_request_t *inp, const char *val)
{
  trunnel_free(inp->socks4a_addr_hostname);
  if (NULL == (inp->socks4a_addr_hostname = trunnel_strdup(val))) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  return 0;
}
const char *
socks4_client_request_check(const socks4_client_request_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 4))
    return "Integer out of bounds";
  if (! (obj->command == CMD_BIND || obj->command == CMD_CONNECT || obj->command == CMD_RESOLVE || obj->command == CMD_RESOLVE_PTR))
    return "Integer out of bounds";
  if (NULL == obj->username)
    return "Missing username";
  switch (obj->addr) {

    case 1:
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    case 254:
    case 255:
      if (NULL == obj->socks4a_addr_hostname)
        return "Missing socks4a_addr_hostname";
      break;

    default:
      break;
  }
  return NULL;
}

ssize_t
socks4_client_request_encoded_len(const socks4_client_request_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks4_client_request_check(obj))
     return -1;


  /* Length of u8 version IN [4] */
  result += 1;

  /* Length of u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR] */
  result += 1;

  /* Length of u16 port */
  result += 2;

  /* Length of u32 addr */
  result += 4;

  /* Length of nulterm username */
  result += strlen(obj->username) + 1;
  switch (obj->addr) {

    case 1:
    case 2:
    case 3:
    case 4:
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    case 255:

      /* Length of nulterm socks4a_addr_hostname */
      result += strlen(obj->socks4a_addr_hostname) + 1;
      break;

    default:
      break;
  }
  return result;
}
int
socks4_client_request_clear_errors(socks4_client_request_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks4_client_request_encode(uint8_t *output, const size_t avail, const socks4_client_request_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks4_client_request_encoded_len(obj);
#endif

  if (NULL != (msg = socks4_client_request_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [4] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->command));
  written += 1; ptr += 1;

  /* Encode u16 port */
  trunnel_assert(written <= avail);
  if (avail - written < 2)
    goto truncated;
  trunnel_set_uint16(ptr, trunnel_htons(obj->port));
  written += 2; ptr += 2;

  /* Encode u32 addr */
  trunnel_assert(written <= avail);
  if (avail - written < 4)
    goto truncated;
  trunnel_set_uint32(ptr, trunnel_htonl(obj->addr));
  written += 4; ptr += 4;

  /* Encode nulterm username */
  {
    size_t len = strlen(obj->username);
    trunnel_assert(written <= avail);
    if (avail - written < len + 1)
      goto truncated;
    memcpy(ptr, obj->username, len + 1);
    ptr += len + 1; written += len + 1;
  }

  /* Encode union socks4a_addr[addr] */
  trunnel_assert(written <= avail);
  switch (obj->addr) {

    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
    case 10:
    case 11:
    case 12:
    case 13:
    case 14:
    case 15:
    case 16:
    case 17:
    case 18:
    case 19:
    case 20:
    case 21:
    case 22:
    case 23:
    case 24:
    case 25:
    case 26:
    case 27:
    case 28:
    case 29:
    case 30:
    case 31:
    case 32:
    case 33:
    case 34:
    case 35:
    case 36:
    case 37:
    case 38:
    case 39:
    case 40:
    case 41:
    case 42:
    case 43:
    case 44:
    case 45:
    case 46:
    case 47:
    case 48:
    case 49:
    case 50:
    case 51:
    case 52:
    case 53:
    case 54:
    case 55:
    case 56:
    case 57:
    case 58:
    case 59:
    case 60:
    case 61:
    case 62:
    case 63:
    case 64:
    case 65:
    case 66:
    case 67:
    case 68:
    case 69:
    case 70:
    case 71:
    case 72:
    case 73:
    case 74:
    case 75:
    case 76:
    case 77:
    case 78:
    case 79:
    case 80:
    case 81:
    case 82:
    case 83:
    case 84:
    case 85:
    case 86:
    case 87:
    case 88:
    case 89:
    case 90:
    case 91:
    case 92:
    case 93:
    case 94:
    case 95:
    case 96:
    case 97:
    case 98:
    case 99:
    case 100:
    case 101:
    case 102:
    case 103:
    case 104:
    case 105:
    case 106:
    case 107:
    case 108:
    case 109:
    case 110:
    case 111:
    case 112:
    case 113:
    case 114:
    case 115:
    case 116:
    case 117:
    case 118:
    case 119:
    case 120:
    case 121:
    case 122:
    case 123:
    case 124:
    case 125:
    case 126:
    case 127:
    case 128:
    case 129:
    case 130:
    case 131:
    case 132:
    case 133:
    case 134:
    case 135:
    case 136:
    case 137:
    case 138:
    case 139:
    case 140:
    case 141:
    case 142:
    case 143:
    case 144:
    case 145:
    case 146:
    case 147:
    case 148:
    case 149:
    case 150:
    case 151:
    case 152:
    case 153:
    case 154:
    case 155:
    case 156:
    case 157:
    case 158:
    case 159:
    case 160:
    case 161:
    case 162:
    case 163:
    case 164:
    case 165:
    case 166:
    case 167:
    case 168:
    case 169:
    case 170:
    case 171:
    case 172:
    case 173:
    case 174:
    case 175:
    case 176:
    case 177:
    case 178:
    case 179:
    case 180:
    case 181:
    case 182:
    case 183:
    case 184:
    case 185:
    case 186:
    case 187:
    case 188:
    case 189:
    case 190:
    case 191:
    case 192:
    case 193:
    case 194:
    case 195:
    case 196:
    case 197:
    case 198:
    case 199:
    case 200:
    case 201:
    case 202:
    case 203:
    case 204:
    case 205:
    case 206:
    case 207:
    case 208:
    case 209:
    case 210:
    case 211:
    case 212:
    case 213:
    case 214:
    case 215:
    case 216:
    case 217:
    case 218:
    case 219:
    case 220:
    case 221:
    case 222:
    case 223:
    case 224:
    case 225:
    case 226:
    case 227:
    case 228:
    case 229:
    case 230:
    case 231:
    case 232:
    case 233:
    case 234:
    case 235:
    case 236:
    case 237:
    case 238:
    case 239:
    case 240:
    case 241:
    case 242:
    case 243:
    case 244:
    case 245:
    case 246:
    case 247:
    case 248:
    case 249:
    case 250:
    case 251:
    case 252:
    case 253:
    case 254:
    case 255:

      /* Encode nulterm socks4a_addr_hostname */
      {
        size_t len = strlen(obj->socks4a_addr_hostname);
        trunnel_assert(written <= avail);
        if (avail - written < len + 1)
          goto truncated;
        memcpy(ptr, obj->socks4a_addr_hostname, len + 1);
        ptr += len + 1; written += len + 1;
      }
      break;

    default:
      break;
  }


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks4_client_request_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks4_client_request_parse_into(socks4_client_request_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [4] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 4))
    goto fail;

  /* Parse u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR] */
  CHECK_REMAINING(1, truncated);
  obj->command = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->command == CMD_BIND || obj->command == CMD_CONNECT || obj->command == CMD_RESOLVE || obj->command == CMD_RESOLVE_PTR))
    goto fail;

  /* Parse u16 port */
  CHECK_REMAINING(2, truncated);
  obj->port = trunnel_ntohs(trunnel_get_uint16(ptr));
  remaining -= 2; ptr += 2;

  /* Parse u32 addr */
  CHECK_REMAINING(4, truncated);
  obj->addr = trunnel_ntohl(trunnel_get_uint32(ptr));
  remaining -= 4; ptr += 4;

  /* Parse nulterm username */
  {
    uint8_t *eos = (uint8_t*)memchr(ptr, 0, remaining);
    size_t memlen;
    if (eos == NULL)
      goto truncated;
    trunnel_assert(eos >= ptr);
    trunnel_assert((size_t)(eos - ptr) < SIZE_MAX - 1);
    memlen = ((size_t)(eos - ptr)) + 1;
    if (!(obj->username = trunnel_malloc(memlen)))
      goto fail;
    memcpy(obj->username, ptr, memlen);
    remaining -= memlen; ptr += memlen;
  }

  /* Parse union socks4a_addr[addr] */
  switch (obj->addr) {

    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
    case 10:
    case 11:
    case 12:
    case 13:
    case 14:
    case 15:
    case 16:
    case 17:
    case 18:
    case 19:
    case 20:
    case 21:
    case 22:
    case 23:
    case 24:
    case 25:
    case 26:
    case 27:
    case 28:
    case 29:
    case 30:
    case 31:
    case 32:
    case 33:
    case 34:
    case 35:
    case 36:
    case 37:
    case 38:
    case 39:
    case 40:
    case 41:
    case 42:
    case 43:
    case 44:
    case 45:
    case 46:
    case 47:
    case 48:
    case 49:
    case 50:
    case 51:
    case 52:
    case 53:
    case 54:
    case 55:
    case 56:
    case 57:
    case 58:
    case 59:
    case 60:
    case 61:
    case 62:
    case 63:
    case 64:
    case 65:
    case 66:
    case 67:
    case 68:
    case 69:
    case 70:
    case 71:
    case 72:
    case 73:
    case 74:
    case 75:
    case 76:
    case 77:
    case 78:
    case 79:
    case 80:
    case 81:
    case 82:
    case 83:
    case 84:
    case 85:
    case 86:
    case 87:
    case 88:
    case 89:
    case 90:
    case 91:
    case 92:
    case 93:
    case 94:
    case 95:
    case 96:
    case 97:
    case 98:
    case 99:
    case 100:
    case 101:
    case 102:
    case 103:
    case 104:
    case 105:
    case 106:
    case 107:
    case 108:
    case 109:
    case 110:
    case 111:
    case 112:
    case 113:
    case 114:
    case 115:
    case 116:
    case 117:
    case 118:
    case 119:
    case 120:
    case 121:
    case 122:
    case 123:
    case 124:
    case 125:
    case 126:
    case 127:
    case 128:
    case 129:
    case 130:
    case 131:
    case 132:
    case 133:
    case 134:
    case 135:
    case 136:
    case 137:
    case 138:
    case 139:
    case 140:
    case 141:
    case 142:
    case 143:
    case 144:
    case 145:
    case 146:
    case 147:
    case 148:
    case 149:
    case 150:
    case 151:
    case 152:
    case 153:
    case 154:
    case 155:
    case 156:
    case 157:
    case 158:
    case 159:
    case 160:
    case 161:
    case 162:
    case 163:
    case 164:
    case 165:
    case 166:
    case 167:
    case 168:
    case 169:
    case 170:
    case 171:
    case 172:
    case 173:
    case 174:
    case 175:
    case 176:
    case 177:
    case 178:
    case 179:
    case 180:
    case 181:
    case 182:
    case 183:
    case 184:
    case 185:
    case 186:
    case 187:
    case 188:
    case 189:
    case 190:
    case 191:
    case 192:
    case 193:
    case 194:
    case 195:
    case 196:
    case 197:
    case 198:
    case 199:
    case 200:
    case 201:
    case 202:
    case 203:
    case 204:
    case 205:
    case 206:
    case 207:
    case 208:
    case 209:
    case 210:
    case 211:
    case 212:
    case 213:
    case 214:
    case 215:
    case 216:
    case 217:
    case 218:
    case 219:
    case 220:
    case 221:
    case 222:
    case 223:
    case 224:
    case 225:
    case 226:
    case 227:
    case 228:
    case 229:
    case 230:
    case 231:
    case 232:
    case 233:
    case 234:
    case 235:
    case 236:
    case 237:
    case 238:
    case 239:
    case 240:
    case 241:
    case 242:
    case 243:
    case 244:
    case 245:
    case 246:
    case 247:
    case 248:
    case 249:
    case 250:
    case 251:
    case 252:
    case 253:
    case 254:
    case 255:

      /* Parse nulterm socks4a_addr_hostname */
      {
        uint8_t *eos = (uint8_t*)memchr(ptr, 0, remaining);
        size_t memlen;
        if (eos == NULL)
          goto truncated;
        trunnel_assert(eos >= ptr);
        trunnel_assert((size_t)(eos - ptr) < SIZE_MAX - 1);
        memlen = ((size_t)(eos - ptr)) + 1;
        if (!(obj->socks4a_addr_hostname = trunnel_malloc(memlen)))
          goto fail;
        memcpy(obj->socks4a_addr_hostname, ptr, memlen);
        remaining -= memlen; ptr += memlen;
      }
      break;

    default:
      break;
  }
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
socks4_client_request_parse(socks4_client_request_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks4_client_request_new();
  if (NULL == *output)
    return -1;
  result = socks4_client_request_parse_into(*output, input, len_in);
  if (result < 0) {
    socks4_client_request_free(*output);
    *output = NULL;
  }
  return result;
}
socks4_server_reply_t *
socks4_server_reply_new(void)
{
  socks4_server_reply_t *val = trunnel_calloc(1, sizeof(socks4_server_reply_t));
  if (NULL == val)
    return NULL;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks4_server_reply_clear(socks4_server_reply_t *obj)
{
  (void) obj;
}

void
socks4_server_reply_free(socks4_server_reply_t *obj)
{
  if (obj == NULL)
    return;
  socks4_server_reply_clear(obj);
  trunnel_memwipe(obj, sizeof(socks4_server_reply_t));
  trunnel_free_(obj);
}

uint8_t
socks4_server_reply_get_version(const socks4_server_reply_t *inp)
{
  return inp->version;
}
int
socks4_server_reply_set_version(socks4_server_reply_t *inp, uint8_t val)
{
  if (! ((val == 0 || val == 4))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks4_server_reply_get_status(const socks4_server_reply_t *inp)
{
  return inp->status;
}
int
socks4_server_reply_set_status(socks4_server_reply_t *inp, uint8_t val)
{
  inp->status = val;
  return 0;
}
uint16_t
socks4_server_reply_get_port(const socks4_server_reply_t *inp)
{
  return inp->port;
}
int
socks4_server_reply_set_port(socks4_server_reply_t *inp, uint16_t val)
{
  inp->port = val;
  return 0;
}
uint32_t
socks4_server_reply_get_addr(const socks4_server_reply_t *inp)
{
  return inp->addr;
}
int
socks4_server_reply_set_addr(socks4_server_reply_t *inp, uint32_t val)
{
  inp->addr = val;
  return 0;
}
const char *
socks4_server_reply_check(const socks4_server_reply_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 0 || obj->version == 4))
    return "Integer out of bounds";
  return NULL;
}

ssize_t
socks4_server_reply_encoded_len(const socks4_server_reply_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks4_server_reply_check(obj))
     return -1;


  /* Length of u8 version IN [0, 4] */
  result += 1;

  /* Length of u8 status */
  result += 1;

  /* Length of u16 port */
  result += 2;

  /* Length of u32 addr */
  result += 4;
  return result;
}
int
socks4_server_reply_clear_errors(socks4_server_reply_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks4_server_reply_encode(uint8_t *output, const size_t avail, const socks4_server_reply_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks4_server_reply_encoded_len(obj);
#endif

  if (NULL != (msg = socks4_server_reply_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [0, 4] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 status */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->status));
  written += 1; ptr += 1;

  /* Encode u16 port */
  trunnel_assert(written <= avail);
  if (avail - written < 2)
    goto truncated;
  trunnel_set_uint16(ptr, trunnel_htons(obj->port));
  written += 2; ptr += 2;

  /* Encode u32 addr */
  trunnel_assert(written <= avail);
  if (avail - written < 4)
    goto truncated;
  trunnel_set_uint32(ptr, trunnel_htonl(obj->addr));
  written += 4; ptr += 4;


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks4_server_reply_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks4_server_reply_parse_into(socks4_server_reply_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [0, 4] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 0 || obj->version == 4))
    goto fail;

  /* Parse u8 status */
  CHECK_REMAINING(1, truncated);
  obj->status = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse u16 port */
  CHECK_REMAINING(2, truncated);
  obj->port = trunnel_ntohs(trunnel_get_uint16(ptr));
  remaining -= 2; ptr += 2;

  /* Parse u32 addr */
  CHECK_REMAINING(4, truncated);
  obj->addr = trunnel_ntohl(trunnel_get_uint32(ptr));
  remaining -= 4; ptr += 4;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
socks4_server_reply_parse(socks4_server_reply_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks4_server_reply_new();
  if (NULL == *output)
    return -1;
  result = socks4_server_reply_parse_into(*output, input, len_in);
  if (result < 0) {
    socks4_server_reply_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_client_userpass_auth_t *
socks5_client_userpass_auth_new(void)
{
  socks5_client_userpass_auth_t *val = trunnel_calloc(1, sizeof(socks5_client_userpass_auth_t));
  if (NULL == val)
    return NULL;
  val->version = 1;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_client_userpass_auth_clear(socks5_client_userpass_auth_t *obj)
{
  (void) obj;
  TRUNNEL_DYNARRAY_WIPE(&obj->username);
  TRUNNEL_DYNARRAY_CLEAR(&obj->username);
  TRUNNEL_DYNARRAY_WIPE(&obj->passwd);
  TRUNNEL_DYNARRAY_CLEAR(&obj->passwd);
}

void
socks5_client_userpass_auth_free(socks5_client_userpass_auth_t *obj)
{
  if (obj == NULL)
    return;
  socks5_client_userpass_auth_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_client_userpass_auth_t));
  trunnel_free_(obj);
}

uint8_t
socks5_client_userpass_auth_get_version(const socks5_client_userpass_auth_t *inp)
{
  return inp->version;
}
int
socks5_client_userpass_auth_set_version(socks5_client_userpass_auth_t *inp, uint8_t val)
{
  if (! ((val == 1))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_client_userpass_auth_get_username_len(const socks5_client_userpass_auth_t *inp)
{
  return inp->username_len;
}
int
socks5_client_userpass_auth_set_username_len(socks5_client_userpass_auth_t *inp, uint8_t val)
{
  inp->username_len = val;
  return 0;
}
size_t
socks5_client_userpass_auth_getlen_username(const socks5_client_userpass_auth_t *inp)
{
  return TRUNNEL_DYNARRAY_LEN(&inp->username);
}

char
socks5_client_userpass_auth_get_username(socks5_client_userpass_auth_t *inp, size_t idx)
{
  return TRUNNEL_DYNARRAY_GET(&inp->username, idx);
}

char
socks5_client_userpass_auth_getconst_username(const socks5_client_userpass_auth_t *inp, size_t idx)
{
  return socks5_client_userpass_auth_get_username((socks5_client_userpass_auth_t*)inp, idx);
}
int
socks5_client_userpass_auth_set_username(socks5_client_userpass_auth_t *inp, size_t idx, char elt)
{
  TRUNNEL_DYNARRAY_SET(&inp->username, idx, elt);
  return 0;
}
int
socks5_client_userpass_auth_add_username(socks5_client_userpass_auth_t *inp, char elt)
{
#if SIZE_MAX >= UINT8_MAX
  if (inp->username.n_ == UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  TRUNNEL_DYNARRAY_ADD(char, &inp->username, elt, {});
  return 0;
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}

char *
socks5_client_userpass_auth_getarray_username(socks5_client_userpass_auth_t *inp)
{
  return inp->username.elts_;
}
const char  *
socks5_client_userpass_auth_getconstarray_username(const socks5_client_userpass_auth_t *inp)
{
  return (const char  *)socks5_client_userpass_auth_getarray_username((socks5_client_userpass_auth_t*)inp);
}
int
socks5_client_userpass_auth_setlen_username(socks5_client_userpass_auth_t *inp, size_t newlen)
{
#if UINT8_MAX < SIZE_MAX
  if (newlen > UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  return trunnel_string_setlen(&inp->username, newlen,
            &inp->trunnel_error_code_);
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}
const char *
socks5_client_userpass_auth_getstr_username(socks5_client_userpass_auth_t *inp)
{
  return trunnel_string_getstr(&inp->username);
}
int
socks5_client_userpass_auth_setstr0_username(socks5_client_userpass_auth_t *inp, const char *val, size_t len)
{
#if UINT8_MAX < SIZE_MAX
  if (len > UINT8_MAX) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
#endif
  return trunnel_string_setstr0(&inp->username, val, len, &inp->trunnel_error_code_);
}
int
socks5_client_userpass_auth_setstr_username(socks5_client_userpass_auth_t *inp, const char *val)
{
  return socks5_client_userpass_auth_setstr0_username(inp, val, strlen(val));
}
uint8_t
socks5_client_userpass_auth_get_passwd_len(const socks5_client_userpass_auth_t *inp)
{
  return inp->passwd_len;
}
int
socks5_client_userpass_auth_set_passwd_len(socks5_client_userpass_auth_t *inp, uint8_t val)
{
  inp->passwd_len = val;
  return 0;
}
size_t
socks5_client_userpass_auth_getlen_passwd(const socks5_client_userpass_auth_t *inp)
{
  return TRUNNEL_DYNARRAY_LEN(&inp->passwd);
}

char
socks5_client_userpass_auth_get_passwd(socks5_client_userpass_auth_t *inp, size_t idx)
{
  return TRUNNEL_DYNARRAY_GET(&inp->passwd, idx);
}

char
socks5_client_userpass_auth_getconst_passwd(const socks5_client_userpass_auth_t *inp, size_t idx)
{
  return socks5_client_userpass_auth_get_passwd((socks5_client_userpass_auth_t*)inp, idx);
}
int
socks5_client_userpass_auth_set_passwd(socks5_client_userpass_auth_t *inp, size_t idx, char elt)
{
  TRUNNEL_DYNARRAY_SET(&inp->passwd, idx, elt);
  return 0;
}
int
socks5_client_userpass_auth_add_passwd(socks5_client_userpass_auth_t *inp, char elt)
{
#if SIZE_MAX >= UINT8_MAX
  if (inp->passwd.n_ == UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  TRUNNEL_DYNARRAY_ADD(char, &inp->passwd, elt, {});
  return 0;
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}

char *
socks5_client_userpass_auth_getarray_passwd(socks5_client_userpass_auth_t *inp)
{
  return inp->passwd.elts_;
}
const char  *
socks5_client_userpass_auth_getconstarray_passwd(const socks5_client_userpass_auth_t *inp)
{
  return (const char  *)socks5_client_userpass_auth_getarray_passwd((socks5_client_userpass_auth_t*)inp);
}
int
socks5_client_userpass_auth_setlen_passwd(socks5_client_userpass_auth_t *inp, size_t newlen)
{
#if UINT8_MAX < SIZE_MAX
  if (newlen > UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  return trunnel_string_setlen(&inp->passwd, newlen,
            &inp->trunnel_error_code_);
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}
const char *
socks5_client_userpass_auth_getstr_passwd(socks5_client_userpass_auth_t *inp)
{
  return trunnel_string_getstr(&inp->passwd);
}
int
socks5_client_userpass_auth_setstr0_passwd(socks5_client_userpass_auth_t *inp, const char *val, size_t len)
{
#if UINT8_MAX < SIZE_MAX
  if (len > UINT8_MAX) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
#endif
  return trunnel_string_setstr0(&inp->passwd, val, len, &inp->trunnel_error_code_);
}
int
socks5_client_userpass_auth_setstr_passwd(socks5_client_userpass_auth_t *inp, const char *val)
{
  return socks5_client_userpass_auth_setstr0_passwd(inp, val, strlen(val));
}
const char *
socks5_client_userpass_auth_check(const socks5_client_userpass_auth_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 1))
    return "Integer out of bounds";
  if (TRUNNEL_DYNARRAY_LEN(&obj->username) != obj->username_len)
    return "Length mismatch for username";
  if (TRUNNEL_DYNARRAY_LEN(&obj->passwd) != obj->passwd_len)
    return "Length mismatch for passwd";
  return NULL;
}

ssize_t
socks5_client_userpass_auth_encoded_len(const socks5_client_userpass_auth_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_client_userpass_auth_check(obj))
     return -1;


  /* Length of u8 version IN [1] */
  result += 1;

  /* Length of u8 username_len */
  result += 1;

  /* Length of char username[username_len] */
  result += TRUNNEL_DYNARRAY_LEN(&obj->username);

  /* Length of u8 passwd_len */
  result += 1;

  /* Length of char passwd[passwd_len] */
  result += TRUNNEL_DYNARRAY_LEN(&obj->passwd);
  return result;
}
int
socks5_client_userpass_auth_clear_errors(socks5_client_userpass_auth_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_client_userpass_auth_encode(uint8_t *output, const size_t avail, const socks5_client_userpass_auth_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_client_userpass_auth_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_client_userpass_auth_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [1] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 username_len */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->username_len));
  written += 1; ptr += 1;

  /* Encode char username[username_len] */
  {
    size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->username);
    trunnel_assert(obj->username_len == elt_len);
    trunnel_assert(written <= avail);
    if (avail - written < elt_len)
      goto truncated;
    if (elt_len)
      memcpy(ptr, obj->username.elts_, elt_len);
    written += elt_len; ptr += elt_len;
  }

  /* Encode u8 passwd_len */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->passwd_len));
  written += 1; ptr += 1;

  /* Encode char passwd[passwd_len] */
  {
    size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->passwd);
    trunnel_assert(obj->passwd_len == elt_len);
    trunnel_assert(written <= avail);
    if (avail - written < elt_len)
      goto truncated;
    if (elt_len)
      memcpy(ptr, obj->passwd.elts_, elt_len);
    written += elt_len; ptr += elt_len;
  }


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_client_userpass_auth_parse(), but do not allocate the
 * output object.
 */
static ssize_t
socks5_client_userpass_auth_parse_into(socks5_client_userpass_auth_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [1] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 1))
    goto fail;

  /* Parse u8 username_len */
  CHECK_REMAINING(1, truncated);
  obj->username_len = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse char username[username_len] */
  CHECK_REMAINING(obj->username_len, truncated);
  if (socks5_client_userpass_auth_setstr0_username(obj, (const char*)ptr, obj->username_len))
    goto fail;
  ptr += obj->username_len; remaining -= obj->username_len;

  /* Parse u8 passwd_len */
  CHECK_REMAINING(1, truncated);
  obj->passwd_len = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse char passwd[passwd_len] */
  CHECK_REMAINING(obj->passwd_len, truncated);
  if (socks5_client_userpass_auth_setstr0_passwd(obj, (const char*)ptr, obj->passwd_len))
    goto fail;
  ptr += obj->passwd_len; remaining -= obj->passwd_len;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_client_userpass_auth_parse(socks5_client_userpass_auth_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_client_userpass_auth_new();
  if (NULL == *output)
    return -1;
  result = socks5_client_userpass_auth_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_client_userpass_auth_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_client_version_t *
socks5_client_version_new(void)
{
  socks5_client_version_t *val = trunnel_calloc(1, sizeof(socks5_client_version_t));
  if (NULL == val)
    return NULL;
  val->version = 5;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_client_version_clear(socks5_client_version_t *obj)
{
  (void) obj;
  TRUNNEL_DYNARRAY_WIPE(&obj->methods);
  TRUNNEL_DYNARRAY_CLEAR(&obj->methods);
}

void
socks5_client_version_free(socks5_client_version_t *obj)
{
  if (obj == NULL)
    return;
  socks5_client_version_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_client_version_t));
  trunnel_free_(obj);
}

uint8_t
socks5_client_version_get_version(const socks5_client_version_t *inp)
{
  return inp->version;
}
int
socks5_client_version_set_version(socks5_client_version_t *inp, uint8_t val)
{
  if (! ((val == 5))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_client_version_get_n_methods(const socks5_client_version_t *inp)
{
  return inp->n_methods;
}
int
socks5_client_version_set_n_methods(socks5_client_version_t *inp, uint8_t val)
{
  inp->n_methods = val;
  return 0;
}
size_t
socks5_client_version_getlen_methods(const socks5_client_version_t *inp)
{
  return TRUNNEL_DYNARRAY_LEN(&inp->methods);
}

uint8_t
socks5_client_version_get_methods(socks5_client_version_t *inp, size_t idx)
{
  return TRUNNEL_DYNARRAY_GET(&inp->methods, idx);
}

uint8_t
socks5_client_version_getconst_methods(const socks5_client_version_t *inp, size_t idx)
{
  return socks5_client_version_get_methods((socks5_client_version_t*)inp, idx);
}
int
socks5_client_version_set_methods(socks5_client_version_t *inp, size_t idx, uint8_t elt)
{
  TRUNNEL_DYNARRAY_SET(&inp->methods, idx, elt);
  return 0;
}
int
socks5_client_version_add_methods(socks5_client_version_t *inp, uint8_t elt)
{
#if SIZE_MAX >= UINT8_MAX
  if (inp->methods.n_ == UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->methods, elt, {});
  return 0;
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}

uint8_t *
socks5_client_version_getarray_methods(socks5_client_version_t *inp)
{
  return inp->methods.elts_;
}
const uint8_t  *
socks5_client_version_getconstarray_methods(const socks5_client_version_t *inp)
{
  return (const uint8_t  *)socks5_client_version_getarray_methods((socks5_client_version_t*)inp);
}
int
socks5_client_version_setlen_methods(socks5_client_version_t *inp, size_t newlen)
{
  uint8_t *newptr;
#if UINT8_MAX < SIZE_MAX
  if (newlen > UINT8_MAX)
    goto trunnel_alloc_failed;
#endif
  newptr = trunnel_dynarray_setlen(&inp->methods.allocated_,
                 &inp->methods.n_, inp->methods.elts_, newlen,
                 sizeof(inp->methods.elts_[0]), (trunnel_free_fn_t) NULL,
                 &inp->trunnel_error_code_);
  if (newlen != 0 && newptr == NULL)
    goto trunnel_alloc_failed;
  inp->methods.elts_ = newptr;
  return 0;
 trunnel_alloc_failed:
  TRUNNEL_SET_ERROR_CODE(inp);
  return -1;
}
const char *
socks5_client_version_check(const socks5_client_version_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 5))
    return "Integer out of bounds";
  if (TRUNNEL_DYNARRAY_LEN(&obj->methods) != obj->n_methods)
    return "Length mismatch for methods";
  return NULL;
}

ssize_t
socks5_client_version_encoded_len(const socks5_client_version_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_client_version_check(obj))
     return -1;


  /* Length of u8 version IN [5] */
  result += 1;

  /* Length of u8 n_methods */
  result += 1;

  /* Length of u8 methods[n_methods] */
  result += TRUNNEL_DYNARRAY_LEN(&obj->methods);
  return result;
}
int
socks5_client_version_clear_errors(socks5_client_version_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_client_version_encode(uint8_t *output, const size_t avail, const socks5_client_version_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_client_version_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_client_version_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [5] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 n_methods */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->n_methods));
  written += 1; ptr += 1;

  /* Encode u8 methods[n_methods] */
  {
    size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->methods);
    trunnel_assert(obj->n_methods == elt_len);
    trunnel_assert(written <= avail);
    if (avail - written < elt_len)
      goto truncated;
    if (elt_len)
      memcpy(ptr, obj->methods.elts_, elt_len);
    written += elt_len; ptr += elt_len;
  }


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_client_version_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks5_client_version_parse_into(socks5_client_version_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [5] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 5))
    goto fail;

  /* Parse u8 n_methods */
  CHECK_REMAINING(1, truncated);
  obj->n_methods = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse u8 methods[n_methods] */
  CHECK_REMAINING(obj->n_methods, truncated);
  TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->methods, obj->n_methods, {});
  obj->methods.n_ = obj->n_methods;
  if (obj->n_methods)
    memcpy(obj->methods.elts_, ptr, obj->n_methods);
  ptr += obj->n_methods; remaining -= obj->n_methods;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 trunnel_alloc_failed:
  return -1;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_client_version_parse(socks5_client_version_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_client_version_new();
  if (NULL == *output)
    return -1;
  result = socks5_client_version_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_client_version_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_server_method_t *
socks5_server_method_new(void)
{
  socks5_server_method_t *val = trunnel_calloc(1, sizeof(socks5_server_method_t));
  if (NULL == val)
    return NULL;
  val->version = 5;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_server_method_clear(socks5_server_method_t *obj)
{
  (void) obj;
}

void
socks5_server_method_free(socks5_server_method_t *obj)
{
  if (obj == NULL)
    return;
  socks5_server_method_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_server_method_t));
  trunnel_free_(obj);
}

uint8_t
socks5_server_method_get_version(const socks5_server_method_t *inp)
{
  return inp->version;
}
int
socks5_server_method_set_version(socks5_server_method_t *inp, uint8_t val)
{
  if (! ((val == 5))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_server_method_get_method(const socks5_server_method_t *inp)
{
  return inp->method;
}
int
socks5_server_method_set_method(socks5_server_method_t *inp, uint8_t val)
{
  inp->method = val;
  return 0;
}
const char *
socks5_server_method_check(const socks5_server_method_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 5))
    return "Integer out of bounds";
  return NULL;
}

ssize_t
socks5_server_method_encoded_len(const socks5_server_method_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_server_method_check(obj))
     return -1;


  /* Length of u8 version IN [5] */
  result += 1;

  /* Length of u8 method */
  result += 1;
  return result;
}
int
socks5_server_method_clear_errors(socks5_server_method_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_server_method_encode(uint8_t *output, const size_t avail, const socks5_server_method_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_server_method_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_server_method_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [5] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 method */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->method));
  written += 1; ptr += 1;


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_server_method_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks5_server_method_parse_into(socks5_server_method_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [5] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 5))
    goto fail;

  /* Parse u8 method */
  CHECK_REMAINING(1, truncated);
  obj->method = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_server_method_parse(socks5_server_method_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_server_method_new();
  if (NULL == *output)
    return -1;
  result = socks5_server_method_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_server_method_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_server_userpass_auth_t *
socks5_server_userpass_auth_new(void)
{
  socks5_server_userpass_auth_t *val = trunnel_calloc(1, sizeof(socks5_server_userpass_auth_t));
  if (NULL == val)
    return NULL;
  val->version = 1;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_server_userpass_auth_clear(socks5_server_userpass_auth_t *obj)
{
  (void) obj;
}

void
socks5_server_userpass_auth_free(socks5_server_userpass_auth_t *obj)
{
  if (obj == NULL)
    return;
  socks5_server_userpass_auth_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_server_userpass_auth_t));
  trunnel_free_(obj);
}

uint8_t
socks5_server_userpass_auth_get_version(const socks5_server_userpass_auth_t *inp)
{
  return inp->version;
}
int
socks5_server_userpass_auth_set_version(socks5_server_userpass_auth_t *inp, uint8_t val)
{
  if (! ((val == 1))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_server_userpass_auth_get_status(const socks5_server_userpass_auth_t *inp)
{
  return inp->status;
}
int
socks5_server_userpass_auth_set_status(socks5_server_userpass_auth_t *inp, uint8_t val)
{
  inp->status = val;
  return 0;
}
const char *
socks5_server_userpass_auth_check(const socks5_server_userpass_auth_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 1))
    return "Integer out of bounds";
  return NULL;
}

ssize_t
socks5_server_userpass_auth_encoded_len(const socks5_server_userpass_auth_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_server_userpass_auth_check(obj))
     return -1;


  /* Length of u8 version IN [1] */
  result += 1;

  /* Length of u8 status */
  result += 1;
  return result;
}
int
socks5_server_userpass_auth_clear_errors(socks5_server_userpass_auth_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_server_userpass_auth_encode(uint8_t *output, const size_t avail, const socks5_server_userpass_auth_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_server_userpass_auth_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_server_userpass_auth_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [1] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 status */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->status));
  written += 1; ptr += 1;


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_server_userpass_auth_parse(), but do not allocate the
 * output object.
 */
static ssize_t
socks5_server_userpass_auth_parse_into(socks5_server_userpass_auth_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [1] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 1))
    goto fail;

  /* Parse u8 status */
  CHECK_REMAINING(1, truncated);
  obj->status = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_server_userpass_auth_parse(socks5_server_userpass_auth_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_server_userpass_auth_new();
  if (NULL == *output)
    return -1;
  result = socks5_server_userpass_auth_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_server_userpass_auth_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_client_request_t *
socks5_client_request_new(void)
{
  socks5_client_request_t *val = trunnel_calloc(1, sizeof(socks5_client_request_t));
  if (NULL == val)
    return NULL;
  val->version = 5;
  val->command = CMD_BIND;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_client_request_clear(socks5_client_request_t *obj)
{
  (void) obj;
  domainname_free(obj->dest_addr_domainname);
  obj->dest_addr_domainname = NULL;
}

void
socks5_client_request_free(socks5_client_request_t *obj)
{
  if (obj == NULL)
    return;
  socks5_client_request_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_client_request_t));
  trunnel_free_(obj);
}

uint8_t
socks5_client_request_get_version(const socks5_client_request_t *inp)
{
  return inp->version;
}
int
socks5_client_request_set_version(socks5_client_request_t *inp, uint8_t val)
{
  if (! ((val == 5))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_client_request_get_command(const socks5_client_request_t *inp)
{
  return inp->command;
}
int
socks5_client_request_set_command(socks5_client_request_t *inp, uint8_t val)
{
  if (! ((val == CMD_BIND || val == CMD_CONNECT || val == CMD_RESOLVE || val == CMD_RESOLVE_PTR || val == CMD_UDP_ASSOCIATE))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->command = val;
  return 0;
}
uint8_t
socks5_client_request_get_reserved(const socks5_client_request_t *inp)
{
  return inp->reserved;
}
int
socks5_client_request_set_reserved(socks5_client_request_t *inp, uint8_t val)
{
  if (! ((val == 0))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->reserved = val;
  return 0;
}
uint8_t
socks5_client_request_get_atype(const socks5_client_request_t *inp)
{
  return inp->atype;
}
int
socks5_client_request_set_atype(socks5_client_request_t *inp, uint8_t val)
{
  inp->atype = val;
  return 0;
}
uint32_t
socks5_client_request_get_dest_addr_ipv4(const socks5_client_request_t *inp)
{
  return inp->dest_addr_ipv4;
}
int
socks5_client_request_set_dest_addr_ipv4(socks5_client_request_t *inp, uint32_t val)
{
  inp->dest_addr_ipv4 = val;
  return 0;
}
size_t
socks5_client_request_getlen_dest_addr_ipv6(const socks5_client_request_t *inp)
{
  (void)inp;  return 16;
}

uint8_t
socks5_client_request_get_dest_addr_ipv6(socks5_client_request_t *inp, size_t idx)
{
  trunnel_assert(idx < 16);
  return inp->dest_addr_ipv6[idx];
}

uint8_t
socks5_client_request_getconst_dest_addr_ipv6(const socks5_client_request_t *inp, size_t idx)
{
  return socks5_client_request_get_dest_addr_ipv6((socks5_client_request_t*)inp, idx);
}
int
socks5_client_request_set_dest_addr_ipv6(socks5_client_request_t *inp, size_t idx, uint8_t elt)
{
  trunnel_assert(idx < 16);
  inp->dest_addr_ipv6[idx] = elt;
  return 0;
}

uint8_t *
socks5_client_request_getarray_dest_addr_ipv6(socks5_client_request_t *inp)
{
  return inp->dest_addr_ipv6;
}
const uint8_t  *
socks5_client_request_getconstarray_dest_addr_ipv6(const socks5_client_request_t *inp)
{
  return (const uint8_t  *)socks5_client_request_getarray_dest_addr_ipv6((socks5_client_request_t*)inp);
}
struct domainname_st *
socks5_client_request_get_dest_addr_domainname(socks5_client_request_t *inp)
{
  return inp->dest_addr_domainname;
}
const struct domainname_st *
socks5_client_request_getconst_dest_addr_domainname(const socks5_client_request_t *inp)
{
  return socks5_client_request_get_dest_addr_domainname((socks5_client_request_t*) inp);
}
int
socks5_client_request_set_dest_addr_domainname(socks5_client_request_t *inp, struct domainname_st *val)
{
  if (inp->dest_addr_domainname && inp->dest_addr_domainname != val)
    domainname_free(inp->dest_addr_domainname);
  return socks5_client_request_set0_dest_addr_domainname(inp, val);
}
int
socks5_client_request_set0_dest_addr_domainname(socks5_client_request_t *inp, struct domainname_st *val)
{
  inp->dest_addr_domainname = val;
  return 0;
}
uint16_t
socks5_client_request_get_dest_port(const socks5_client_request_t *inp)
{
  return inp->dest_port;
}
int
socks5_client_request_set_dest_port(socks5_client_request_t *inp, uint16_t val)
{
  inp->dest_port = val;
  return 0;
}
const char *
socks5_client_request_check(const socks5_client_request_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 5))
    return "Integer out of bounds";
  if (! (obj->command == CMD_BIND || obj->command == CMD_CONNECT || obj->command == CMD_RESOLVE || obj->command == CMD_RESOLVE_PTR || obj->command == CMD_UDP_ASSOCIATE))
    return "Integer out of bounds";
  if (! (obj->reserved == 0))
    return "Integer out of bounds";
  switch (obj->atype) {

    case ATYPE_IPV4:
      break;

    case ATYPE_IPV6:
      break;

    case ATYPE_DOMAINNAME:
      {
        const char *msg;
        if (NULL != (msg = domainname_check(obj->dest_addr_domainname)))
          return msg;
      }
      break;

    default:
        return "Bad tag for union";
      break;
  }
  return NULL;
}

ssize_t
socks5_client_request_encoded_len(const socks5_client_request_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_client_request_check(obj))
     return -1;


  /* Length of u8 version IN [5] */
  result += 1;

  /* Length of u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR, CMD_UDP_ASSOCIATE] */
  result += 1;

  /* Length of u8 reserved IN [0] */
  result += 1;

  /* Length of u8 atype */
  result += 1;
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Length of u32 dest_addr_ipv4 */
      result += 4;
      break;

    case ATYPE_IPV6:

      /* Length of u8 dest_addr_ipv6[16] */
      result += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Length of struct domainname dest_addr_domainname */
      result += domainname_encoded_len(obj->dest_addr_domainname);
      break;

    default:
      trunnel_assert(0);
      break;
  }

  /* Length of u16 dest_port */
  result += 2;
  return result;
}
int
socks5_client_request_clear_errors(socks5_client_request_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_client_request_encode(uint8_t *output, const size_t avail, const socks5_client_request_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_client_request_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_client_request_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [5] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR, CMD_UDP_ASSOCIATE] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->command));
  written += 1; ptr += 1;

  /* Encode u8 reserved IN [0] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->reserved));
  written += 1; ptr += 1;

  /* Encode u8 atype */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->atype));
  written += 1; ptr += 1;

  /* Encode union dest_addr[atype] */
  trunnel_assert(written <= avail);
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Encode u32 dest_addr_ipv4 */
      trunnel_assert(written <= avail);
      if (avail - written < 4)
        goto truncated;
      trunnel_set_uint32(ptr, trunnel_htonl(obj->dest_addr_ipv4));
      written += 4; ptr += 4;
      break;

    case ATYPE_IPV6:

      /* Encode u8 dest_addr_ipv6[16] */
      trunnel_assert(written <= avail);
      if (avail - written < 16)
        goto truncated;
      memcpy(ptr, obj->dest_addr_ipv6, 16);
      written += 16; ptr += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Encode struct domainname dest_addr_domainname */
      trunnel_assert(written <= avail);
      result = domainname_encode(ptr, avail - written, obj->dest_addr_domainname);
      if (result < 0)
        goto fail; /* XXXXXXX !*/
      written += result; ptr += result;
      break;

    default:
      trunnel_assert(0);
      break;
  }

  /* Encode u16 dest_port */
  trunnel_assert(written <= avail);
  if (avail - written < 2)
    goto truncated;
  trunnel_set_uint16(ptr, trunnel_htons(obj->dest_port));
  written += 2; ptr += 2;


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_client_request_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks5_client_request_parse_into(socks5_client_request_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [5] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 5))
    goto fail;

  /* Parse u8 command IN [CMD_BIND, CMD_CONNECT, CMD_RESOLVE, CMD_RESOLVE_PTR, CMD_UDP_ASSOCIATE] */
  CHECK_REMAINING(1, truncated);
  obj->command = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->command == CMD_BIND || obj->command == CMD_CONNECT || obj->command == CMD_RESOLVE || obj->command == CMD_RESOLVE_PTR || obj->command == CMD_UDP_ASSOCIATE))
    goto fail;

  /* Parse u8 reserved IN [0] */
  CHECK_REMAINING(1, truncated);
  obj->reserved = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->reserved == 0))
    goto fail;

  /* Parse u8 atype */
  CHECK_REMAINING(1, truncated);
  obj->atype = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse union dest_addr[atype] */
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Parse u32 dest_addr_ipv4 */
      CHECK_REMAINING(4, truncated);
      obj->dest_addr_ipv4 = trunnel_ntohl(trunnel_get_uint32(ptr));
      remaining -= 4; ptr += 4;
      break;

    case ATYPE_IPV6:

      /* Parse u8 dest_addr_ipv6[16] */
      CHECK_REMAINING(16, truncated);
      memcpy(obj->dest_addr_ipv6, ptr, 16);
      remaining -= 16; ptr += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Parse struct domainname dest_addr_domainname */
      result = domainname_parse(&obj->dest_addr_domainname, ptr, remaining);
      if (result < 0)
        goto relay_fail;
      trunnel_assert((size_t)result <= remaining);
      remaining -= result; ptr += result;
      break;

    default:
      goto fail;
      break;
  }

  /* Parse u16 dest_port */
  CHECK_REMAINING(2, truncated);
  obj->dest_port = trunnel_ntohs(trunnel_get_uint16(ptr));
  remaining -= 2; ptr += 2;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 relay_fail:
  trunnel_assert(result < 0);
  return result;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_client_request_parse(socks5_client_request_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_client_request_new();
  if (NULL == *output)
    return -1;
  result = socks5_client_request_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_client_request_free(*output);
    *output = NULL;
  }
  return result;
}
socks5_server_reply_t *
socks5_server_reply_new(void)
{
  socks5_server_reply_t *val = trunnel_calloc(1, sizeof(socks5_server_reply_t));
  if (NULL == val)
    return NULL;
  val->version = 5;
  return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
 */
static void
socks5_server_reply_clear(socks5_server_reply_t *obj)
{
  (void) obj;
  domainname_free(obj->bind_addr_domainname);
  obj->bind_addr_domainname = NULL;
}

void
socks5_server_reply_free(socks5_server_reply_t *obj)
{
  if (obj == NULL)
    return;
  socks5_server_reply_clear(obj);
  trunnel_memwipe(obj, sizeof(socks5_server_reply_t));
  trunnel_free_(obj);
}

uint8_t
socks5_server_reply_get_version(const socks5_server_reply_t *inp)
{
  return inp->version;
}
int
socks5_server_reply_set_version(socks5_server_reply_t *inp, uint8_t val)
{
  if (! ((val == 5))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->version = val;
  return 0;
}
uint8_t
socks5_server_reply_get_reply(const socks5_server_reply_t *inp)
{
  return inp->reply;
}
int
socks5_server_reply_set_reply(socks5_server_reply_t *inp, uint8_t val)
{
  inp->reply = val;
  return 0;
}
uint8_t
socks5_server_reply_get_reserved(const socks5_server_reply_t *inp)
{
  return inp->reserved;
}
int
socks5_server_reply_set_reserved(socks5_server_reply_t *inp, uint8_t val)
{
  if (! ((val == 0))) {
     TRUNNEL_SET_ERROR_CODE(inp);
     return -1;
  }
  inp->reserved = val;
  return 0;
}
uint8_t
socks5_server_reply_get_atype(const socks5_server_reply_t *inp)
{
  return inp->atype;
}
int
socks5_server_reply_set_atype(socks5_server_reply_t *inp, uint8_t val)
{
  inp->atype = val;
  return 0;
}
uint32_t
socks5_server_reply_get_bind_addr_ipv4(const socks5_server_reply_t *inp)
{
  return inp->bind_addr_ipv4;
}
int
socks5_server_reply_set_bind_addr_ipv4(socks5_server_reply_t *inp, uint32_t val)
{
  inp->bind_addr_ipv4 = val;
  return 0;
}
size_t
socks5_server_reply_getlen_bind_addr_ipv6(const socks5_server_reply_t *inp)
{
  (void)inp;  return 16;
}

uint8_t
socks5_server_reply_get_bind_addr_ipv6(socks5_server_reply_t *inp, size_t idx)
{
  trunnel_assert(idx < 16);
  return inp->bind_addr_ipv6[idx];
}

uint8_t
socks5_server_reply_getconst_bind_addr_ipv6(const socks5_server_reply_t *inp, size_t idx)
{
  return socks5_server_reply_get_bind_addr_ipv6((socks5_server_reply_t*)inp, idx);
}
int
socks5_server_reply_set_bind_addr_ipv6(socks5_server_reply_t *inp, size_t idx, uint8_t elt)
{
  trunnel_assert(idx < 16);
  inp->bind_addr_ipv6[idx] = elt;
  return 0;
}

uint8_t *
socks5_server_reply_getarray_bind_addr_ipv6(socks5_server_reply_t *inp)
{
  return inp->bind_addr_ipv6;
}
const uint8_t  *
socks5_server_reply_getconstarray_bind_addr_ipv6(const socks5_server_reply_t *inp)
{
  return (const uint8_t  *)socks5_server_reply_getarray_bind_addr_ipv6((socks5_server_reply_t*)inp);
}
struct domainname_st *
socks5_server_reply_get_bind_addr_domainname(socks5_server_reply_t *inp)
{
  return inp->bind_addr_domainname;
}
const struct domainname_st *
socks5_server_reply_getconst_bind_addr_domainname(const socks5_server_reply_t *inp)
{
  return socks5_server_reply_get_bind_addr_domainname((socks5_server_reply_t*) inp);
}
int
socks5_server_reply_set_bind_addr_domainname(socks5_server_reply_t *inp, struct domainname_st *val)
{
  if (inp->bind_addr_domainname && inp->bind_addr_domainname != val)
    domainname_free(inp->bind_addr_domainname);
  return socks5_server_reply_set0_bind_addr_domainname(inp, val);
}
int
socks5_server_reply_set0_bind_addr_domainname(socks5_server_reply_t *inp, struct domainname_st *val)
{
  inp->bind_addr_domainname = val;
  return 0;
}
uint16_t
socks5_server_reply_get_bind_port(const socks5_server_reply_t *inp)
{
  return inp->bind_port;
}
int
socks5_server_reply_set_bind_port(socks5_server_reply_t *inp, uint16_t val)
{
  inp->bind_port = val;
  return 0;
}
const char *
socks5_server_reply_check(const socks5_server_reply_t *obj)
{
  if (obj == NULL)
    return "Object was NULL";
  if (obj->trunnel_error_code_)
    return "A set function failed on this object";
  if (! (obj->version == 5))
    return "Integer out of bounds";
  if (! (obj->reserved == 0))
    return "Integer out of bounds";
  switch (obj->atype) {

    case ATYPE_IPV4:
      break;

    case ATYPE_IPV6:
      break;

    case ATYPE_DOMAINNAME:
      {
        const char *msg;
        if (NULL != (msg = domainname_check(obj->bind_addr_domainname)))
          return msg;
      }
      break;

    default:
        return "Bad tag for union";
      break;
  }
  return NULL;
}

ssize_t
socks5_server_reply_encoded_len(const socks5_server_reply_t *obj)
{
  ssize_t result = 0;

  if (NULL != socks5_server_reply_check(obj))
     return -1;


  /* Length of u8 version IN [5] */
  result += 1;

  /* Length of u8 reply */
  result += 1;

  /* Length of u8 reserved IN [0] */
  result += 1;

  /* Length of u8 atype */
  result += 1;
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Length of u32 bind_addr_ipv4 */
      result += 4;
      break;

    case ATYPE_IPV6:

      /* Length of u8 bind_addr_ipv6[16] */
      result += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Length of struct domainname bind_addr_domainname */
      result += domainname_encoded_len(obj->bind_addr_domainname);
      break;

    default:
      trunnel_assert(0);
      break;
  }

  /* Length of u16 bind_port */
  result += 2;
  return result;
}
int
socks5_server_reply_clear_errors(socks5_server_reply_t *obj)
{
  int r = obj->trunnel_error_code_;
  obj->trunnel_error_code_ = 0;
  return r;
}
ssize_t
socks5_server_reply_encode(uint8_t *output, const size_t avail, const socks5_server_reply_t *obj)
{
  ssize_t result = 0;
  size_t written = 0;
  uint8_t *ptr = output;
  const char *msg;
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  const ssize_t encoded_len = socks5_server_reply_encoded_len(obj);
#endif

  if (NULL != (msg = socks5_server_reply_check(obj)))
    goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
  trunnel_assert(encoded_len >= 0);
#endif

  /* Encode u8 version IN [5] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->version));
  written += 1; ptr += 1;

  /* Encode u8 reply */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->reply));
  written += 1; ptr += 1;

  /* Encode u8 reserved IN [0] */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->reserved));
  written += 1; ptr += 1;

  /* Encode u8 atype */
  trunnel_assert(written <= avail);
  if (avail - written < 1)
    goto truncated;
  trunnel_set_uint8(ptr, (obj->atype));
  written += 1; ptr += 1;

  /* Encode union bind_addr[atype] */
  trunnel_assert(written <= avail);
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Encode u32 bind_addr_ipv4 */
      trunnel_assert(written <= avail);
      if (avail - written < 4)
        goto truncated;
      trunnel_set_uint32(ptr, trunnel_htonl(obj->bind_addr_ipv4));
      written += 4; ptr += 4;
      break;

    case ATYPE_IPV6:

      /* Encode u8 bind_addr_ipv6[16] */
      trunnel_assert(written <= avail);
      if (avail - written < 16)
        goto truncated;
      memcpy(ptr, obj->bind_addr_ipv6, 16);
      written += 16; ptr += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Encode struct domainname bind_addr_domainname */
      trunnel_assert(written <= avail);
      result = domainname_encode(ptr, avail - written, obj->bind_addr_domainname);
      if (result < 0)
        goto fail; /* XXXXXXX !*/
      written += result; ptr += result;
      break;

    default:
      trunnel_assert(0);
      break;
  }

  /* Encode u16 bind_port */
  trunnel_assert(written <= avail);
  if (avail - written < 2)
    goto truncated;
  trunnel_set_uint16(ptr, trunnel_htons(obj->bind_port));
  written += 2; ptr += 2;


  trunnel_assert(ptr == output + written);
#ifdef TRUNNEL_CHECK_ENCODED_LEN
  {
    trunnel_assert(encoded_len >= 0);
    trunnel_assert((size_t)encoded_len == written);
  }

#endif

  return written;

 truncated:
  result = -2;
  goto fail;
 check_failed:
  (void)msg;
  result = -1;
  goto fail;
 fail:
  trunnel_assert(result < 0);
  return result;
}

/** As socks5_server_reply_parse(), but do not allocate the output
 * object.
 */
static ssize_t
socks5_server_reply_parse_into(socks5_server_reply_t *obj, const uint8_t *input, const size_t len_in)
{
  const uint8_t *ptr = input;
  size_t remaining = len_in;
  ssize_t result = 0;
  (void)result;

  /* Parse u8 version IN [5] */
  CHECK_REMAINING(1, truncated);
  obj->version = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->version == 5))
    goto fail;

  /* Parse u8 reply */
  CHECK_REMAINING(1, truncated);
  obj->reply = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse u8 reserved IN [0] */
  CHECK_REMAINING(1, truncated);
  obj->reserved = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;
  if (! (obj->reserved == 0))
    goto fail;

  /* Parse u8 atype */
  CHECK_REMAINING(1, truncated);
  obj->atype = (trunnel_get_uint8(ptr));
  remaining -= 1; ptr += 1;

  /* Parse union bind_addr[atype] */
  switch (obj->atype) {

    case ATYPE_IPV4:

      /* Parse u32 bind_addr_ipv4 */
      CHECK_REMAINING(4, truncated);
      obj->bind_addr_ipv4 = trunnel_ntohl(trunnel_get_uint32(ptr));
      remaining -= 4; ptr += 4;
      break;

    case ATYPE_IPV6:

      /* Parse u8 bind_addr_ipv6[16] */
      CHECK_REMAINING(16, truncated);
      memcpy(obj->bind_addr_ipv6, ptr, 16);
      remaining -= 16; ptr += 16;
      break;

    case ATYPE_DOMAINNAME:

      /* Parse struct domainname bind_addr_domainname */
      result = domainname_parse(&obj->bind_addr_domainname, ptr, remaining);
      if (result < 0)
        goto relay_fail;
      trunnel_assert((size_t)result <= remaining);
      remaining -= result; ptr += result;
      break;

    default:
      goto fail;
      break;
  }

  /* Parse u16 bind_port */
  CHECK_REMAINING(2, truncated);
  obj->bind_port = trunnel_ntohs(trunnel_get_uint16(ptr));
  remaining -= 2; ptr += 2;
  trunnel_assert(ptr + remaining == input + len_in);
  return len_in - remaining;

 truncated:
  return -2;
 relay_fail:
  trunnel_assert(result < 0);
  return result;
 fail:
  result = -1;
  return result;
}

ssize_t
socks5_server_reply_parse(socks5_server_reply_t **output, const uint8_t *input, const size_t len_in)
{
  ssize_t result;
  *output = socks5_server_reply_new();
  if (NULL == *output)
    return -1;
  result = socks5_server_reply_parse_into(*output, input, len_in);
  if (result < 0) {
    socks5_server_reply_free(*output);
    *output = NULL;
  }
  return result;
}

Coverage Report

Created: 2023-04-12 06:22