int __osip_find_next_crlfcrlf(const char *start_of_part, const char **end_of_part)
{
const char *start_of_line;
const char *end_of_line;
int i;
start_of_line = start_of_part;
for (;;) {
i = __osip_find_next_crlf(start_of_line, &end_of_line);
if (i == -2) {
} else if (i != 0) { /* error case??? no end of mesage found */
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Final CRLF is missing\n"));
return i;
}
if ('\0' == end_of_line[0]) { /* error case??? no end of message found */
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Final CRLF is missing\n"));
return OSIP_SYNTAXERROR;
} else if ('\r' == end_of_line[0]) {
if ('\n' == end_of_line[1])
end_of_line++;
*end_of_part = end_of_line + 1;
return OSIP_SUCCESS;
} else if ('\n' == end_of_line[0]) {
*end_of_part = end_of_line + 1;
return OSIP_SUCCESS;
}
start_of_line = end_of_line;
}
}
static int
osip_body_parse_header (osip_body_t * body,
const char *start_of_osip_body_header,
const char **next_body)
{
const char *start_of_line;
const char *end_of_line;
const char *colon_index;
char *hname;
char *hvalue;
int i;
*next_body = NULL;
start_of_line = start_of_osip_body_header;
for (;;)
{
i = __osip_find_next_crlf (start_of_line, &end_of_line);
if (i == -1)
return -1; /* error case: no end of body found */
/* find the headere name */
colon_index = strchr (start_of_line, ':');
if (colon_index == NULL)
return -1; /* this is also an error case */
if (colon_index - start_of_line + 1 < 2)
return -1;
hname = (char *) osip_malloc (colon_index - start_of_line + 1);
if (hname == NULL)
return -1;
osip_strncpy (hname, start_of_line, colon_index - start_of_line);
osip_clrspace (hname);
if ((end_of_line - 2) - colon_index < 2)
return -1;
hvalue = (char *) osip_malloc ((end_of_line - 2) - colon_index);
if (hvalue == NULL)
{
osip_free (hname);
return -1;
}
osip_strncpy (hvalue, colon_index + 1,
(end_of_line - 2) - colon_index - 1);
osip_clrspace (hvalue);
/* really store the header in the sip structure */
if (osip_strncasecmp (hname, "content-type", 12) == 0)
i = osip_body_set_contenttype (body, hvalue);
else
i = osip_body_set_header (body, hname, hvalue);
osip_free (hname);
osip_free (hvalue);
if (i == -1)
return -1;
if (strncmp (end_of_line, CRLF, 2) == 0
|| strncmp (end_of_line, "\n", 1) == 0
|| strncmp (end_of_line, "\r", 1) == 0)
{
*next_body = end_of_line;
return 0;
}
start_of_line = end_of_line;
}
}
/* set all headers */
static int
msg_headers_parse(osip_message_t * sip, const char *start_of_header,
const char **body)
{
const char *colon_index; /* index of ':' */
char *hname;
char *hvalue;
const char *end_of_header;
int i;
for (;;) {
if (start_of_header[0] == '\0') { /* final CRLF is missing */
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_INFO1, NULL,
"SIP message does not end with CRLFCRLF\n"));
return OSIP_SUCCESS;
}
i = __osip_find_next_crlf(start_of_header, &end_of_header);
if (i == -2) {
} else if (i != 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"End of header Not found\n"));
return i; /* this is an error case! */
}
/* the list of headers MUST always end with */
/* CRLFCRLF (also CRCR and LFLF are allowed) */
if ((start_of_header[0] == '\r') || (start_of_header[0] == '\n')) {
*body = start_of_header;
return OSIP_SUCCESS; /* end of header found */
}
/* find the header name */
colon_index = strchr(start_of_header, ':');
if (colon_index == NULL) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"End of header Not found\n"));
return OSIP_SYNTAXERROR; /* this is also an error case */
}
if (colon_index - start_of_header + 1 < 2)
return OSIP_SYNTAXERROR;
if (end_of_header <= colon_index) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"Malformed message\n"));
return OSIP_SYNTAXERROR;
}
hname = (char *) osip_malloc(colon_index - start_of_header + 1);
if (hname == NULL)
return OSIP_NOMEM;
osip_clrncpy(hname, start_of_header, colon_index - start_of_header);
{
const char *end;
/* END of header is (end_of_header-2) if header separation is CRLF */
/* END of header is (end_of_header-1) if header separation is CR or LF */
if ((end_of_header[-2] == '\r') || (end_of_header[-2] == '\n'))
end = end_of_header - 2;
else
end = end_of_header - 1;
if ((end) - colon_index < 2)
hvalue = NULL; /* some headers (subject) can be empty */
else {
hvalue = (char *) osip_malloc((end) - colon_index + 1);
if (hvalue == NULL) {
osip_free(hname);
return OSIP_NOMEM;
}
osip_clrncpy(hvalue, colon_index + 1, (end) - colon_index - 1);
}
}
/* hvalue MAY contains multiple value. In this case, they */
/* are separated by commas. But, a comma may be part of a */
/* quoted-string ("here, and there" is an example where the */
/* comma is not a separator!) */
i = osip_message_set_multiple_header(sip, hname, hvalue);
osip_free(hname);
if (hvalue != NULL)
osip_free(hvalue);
if (i != 0) {
OSIP_TRACE(osip_trace
(__FILE__, __LINE__, OSIP_ERROR, NULL,
"End of header Not found\n"));
return OSIP_SYNTAXERROR;
}
/* continue on the next header */
start_of_header = end_of_header;
}
/* Unreachable code
OSIP_TRACE (osip_trace
(__FILE__, __LINE__, OSIP_BUG, NULL,
"This code cannot be reached\n")); */
return OSIP_SYNTAXERROR;
}
