/*! \brief
* Parse a method pointed by _next, assign its enum bit to _method, and update
* _next past the method. Returns 1 if parse succeeded and 0 otherwise.
*/
static int parse_method_advance(str* _next, enum request_method* _method)
{
char* end;
if (unlikely(!_next || !_method)) {
LOG(L_ERR, "Invalid parameter value\n");
return 0;
}
if (unlikely(!_next->len || !_next->s)) {
DBG("No input\n");
*_method = METHOD_OTHER;
return 1;
}
end=_next->s+_next->len;
switch ((_next->s)[0]) {
case 'A':
case 'a':
if ((_next->len > 2) && !strncasecmp(_next->s + 1, "ck", 2)) {
*_method = METHOD_ACK;
_next->len -= 3;
_next->s += 3;
goto found;
} else {
goto unknown;
}
case 'B':
case 'b':
if ((_next->len > 2) && !strncasecmp(_next->s + 1, "ye", 2)) {
*_method = METHOD_BYE;
_next->len -= 3;
_next->s += 3;
goto found;
} else {
goto unknown;
}
case 'C':
case 'c':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "ancel", 5)) {
*_method = METHOD_CANCEL;
_next->len -= 6;
_next->s += 6;
goto found;
} else {
goto unknown;
}
case 'I':
case 'i':
if ((_next->len > 3) &&
((*(_next->s + 1) == 'N') || (*(_next->s + 1) == 'n'))) {
if (!strncasecmp(_next->s + 2, "fo", 2)) {
*_method = METHOD_INFO;
_next->len -= 4;
_next->s += 4;
goto found;
}
if ((_next->len > 5) && !strncasecmp(_next->s + 2, "vite", 4)) {
*_method = METHOD_INVITE;
_next->len -= 6;
_next->s += 6;
goto found;
}
}
goto unknown;
case 'M':
case 'm':
if ((_next->len > 6) && !strncasecmp(_next->s + 1, "essage", 6)) {
*_method = METHOD_MESSAGE;
_next->len -= 7;
_next->s += 7;
goto found;
} else {
goto unknown;
}
case 'N':
case 'n':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "otify", 5)) {
*_method = METHOD_NOTIFY;
_next->len -= 6;
_next->s += 6;
goto found;
} else {
goto unknown;
}
case 'O':
case 'o':
if ((_next->len > 6) && !strncasecmp(_next->s + 1, "ptions", 6)) {
*_method = METHOD_OPTIONS;
_next->len -= 7;
_next->s += 7;
goto found;
} else {
goto unknown;
}
case 'P':
case 'p':
if ((_next->len > 4) && !strncasecmp(_next->s + 1, "rack", 4)) {
*_method = METHOD_PRACK;
_next->len -= 5;
_next->s += 5;
goto found;
}
if ((_next->len > 6) && !strncasecmp(_next->s + 1, "ublish", 6)) {
*_method = METHOD_PUBLISH;
_next->len -= 7;
_next->s += 7;
goto found;
}
goto unknown;
case 'R':
case 'r':
if ((_next->len > 4) &&
((*(_next->s + 1) == 'E') || (*(_next->s + 1) == 'e'))) {
if (!strncasecmp(_next->s + 2, "fer", 3)) {
*_method = METHOD_REFER;
_next->len -= 5;
_next->s += 5;
goto found;
}
if ((_next->len > 7) && !strncasecmp(_next->s + 2, "gister", 6)) {
*_method = METHOD_REGISTER;
_next->len -= 8;
_next->s += 8;
goto found;
}
}
goto unknown;
case 'S':
case 's':
if ((_next->len > 8) && !strncasecmp(_next->s + 1, "ubscribe", 8)) {
*_method = METHOD_SUBSCRIBE;
_next->len -= 9;
_next->s += 9;
goto found;
} else {
goto unknown;
}
case 'U':
case 'u':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "pdate", 5)) {
*_method = METHOD_UPDATE;
_next->len -= 6;
_next->s += 6;
goto found;
} else {
goto unknown;
}
default:
goto unknown;
}
unknown:
if (token_char(*(_next->s))) {
do {
_next->s++;
_next->len--;
} while (_next->len && token_char(*(_next->s)));
*_method = METHOD_OTHER;
return 1;
} else {
return 0;
}
found:
/* check if the method really ends here (if not return 0) */
return (_next->s>=end) || (!token_char(*(_next->s)));
}
/*
* Parse a method pointed by _next, assign its enum bit to _method, and update
* _next past the method. Returns 1 if parse succeeded and 0 otherwise.
*/
static int parse_method(str* _next, unsigned int* _method)
{
if (!_next || !_method) {
LOG(L_ERR, "parse_method: Invalid parameter value\n");
return 0;
}
if (!_next->len || !_next->s) {
DBG("parse_method: No input\n");
return 1;
}
switch ((_next->s)[0]) {
case 'A':
case 'a':
if ((_next->len > 2) && !strncasecmp(_next->s + 1, "ck", 2)) {
*_method = METH_ACK;
_next->len -= 3;
_next->s += 3;
return 1;
} else {
goto unknown;
}
case 'B':
case 'b':
if ((_next->len > 2) && !strncasecmp(_next->s + 1, "ye", 2)) {
*_method = METH_BYE;
_next->len -= 3;
_next->s += 3;
return 1;
} else {
goto unknown;
}
case 'C':
case 'c':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "ancel", 5)) {
*_method = METH_CANCEL;
_next->len -= 6;
_next->s += 6;
return 1;
} else {
goto unknown;
}
case 'I':
case 'i':
if ((_next->len > 3) &&
((*(_next->s + 1) == 'N') || (*(_next->s + 1) == 'n'))) {
if (!strncasecmp(_next->s + 2, "fo", 2)) {
*_method = METH_INFO;
_next->len -= 4;
_next->s += 4;
return 1;
}
if ((_next->len > 5) && !strncasecmp(_next->s + 2, "vite", 4)) {
*_method = METH_INVITE;
_next->len -= 6;
_next->s += 6;
return 1;
}
}
goto unknown;
case 'M':
case 'm':
if ((_next->len > 6) && !strncasecmp(_next->s + 1, "essage", 6)) {
*_method = METH_MESSAGE;
_next->len -= 7;
_next->s += 7;
return 1;
} else {
goto unknown;
}
case 'N':
case 'n':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "otify", 5)) {
*_method = METH_NOTIFY;
_next->len -= 6;
_next->s += 6;
return 1;
} else {
goto unknown;
}
case 'O':
case 'o':
if ((_next->len > 6) && !strncasecmp(_next->s + 1, "ptions", 6)) {
*_method = METH_OPTIONS;
_next->len -= 7;
_next->s += 7;
return 1;
} else {
goto unknown;
}
case 'P':
case 'p':
if ((_next->len > 4) && !strncasecmp(_next->s + 1, "rack", 4)) {
*_method = METH_PRACK;
_next->len -= 5;
_next->s += 5;
return 1;
} else {
goto unknown;
}
case 'R':
case 'r':
if ((_next->len > 4) &&
((*(_next->s + 1) == 'E') || (*(_next->s + 1) == 'e'))) {
if (!strncasecmp(_next->s + 2, "fer", 3)) {
*_method = METH_REFER;
_next->len -= 5;
_next->s += 5;
return 1;
}
if ((_next->len > 7) && !strncasecmp(_next->s + 2, "gister", 6)) {
*_method = METH_REGISTER;
_next->len -= 8;
_next->s += 8;
return 1;
}
}
goto unknown;
case 'S':
case 's':
if ((_next->len > 8) && !strncasecmp(_next->s + 1, "ubscribe", 8)) {
*_method = METH_SUBSCRIBE;
_next->len -= 9;
_next->s += 9;
return 1;
} else {
goto unknown;
}
case 'U':
case 'u':
if ((_next->len > 5) && !strncasecmp(_next->s + 1, "pdate", 5)) {
*_method = METH_UPDATE;
_next->len -= 6;
_next->s += 6;
return 1;
} else {
goto unknown;
}
default:
goto unknown;
}
unknown:
if (token_char(*(_next->s))) {
do {
_next->s++;
_next->len--;
} while (_next->len && token_char(*(_next->s)));
*_method = METH_UNKNOWN;
return 1;
} else {
return 0;
}
}