int extract_mediaip(str *body, str *mediaip, int *pf, char *line)
{
char *cp, *cp1;
int len, nextisip;
cp1 = NULL;
for (cp = body->s; (len = body->s + body->len - cp) > 0;) {
cp1 = (char*)ser_memmem(cp, line, len, 2);
if (cp1 == NULL || cp1[-1] == '\n' || cp1[-1] == '\r')
break;
cp = cp1 + 2;
}
if (cp1 == NULL)
return -1;
mediaip->s = cp1 + 2;
mediaip->len = eat_line(mediaip->s, body->s + body->len - mediaip->s) - mediaip->s;
trim_len(mediaip->len, mediaip->s, *mediaip);
nextisip = 0;
for (cp = mediaip->s; cp < mediaip->s + mediaip->len;) {
len = eat_token_end(cp, mediaip->s + mediaip->len) - cp;
if (nextisip == 1) {
mediaip->s = cp;
mediaip->len = len;
nextisip++;
break;
}
if (len == 3 && memcmp(cp, "IP", 2) == 0) {
switch (cp[2]) {
case '4':
nextisip = 1;
*pf = AF_INET;
break;
case '6':
nextisip = 1;
*pf = AF_INET6;
break;
default:
break;
}
}
/* consume all spaces starting from the second char after the token
First char after the token is the char that stoped the token
parsing, so it is space or \r / \n, so we simply skip it */
cp = eat_space_end(cp + len + 1, mediaip->s + mediaip->len);
}
if (nextisip != 2 || mediaip->len == 0) {
LM_ERR("no `IP[4|6]' in `%s' field\n",line);
return -1;
}
return 1;
}
static int
extract_mediaip(str *body, str *mediaip, int *pf)
{
char *cp, *cp1;
int len, nextisip;
cp1 = NULL;
for (cp = body->s; (len = body->s + body->len - cp) > 0;) {
cp1 = ser_memmem(cp, "c=", len, 2);
if (cp1 == NULL || cp1[-1] == '\n' || cp1[-1] == '\r')
break;
cp = cp1 + 2;
}
if (cp1 == NULL) {
LOG(L_ERR, "ERROR: extract_mediaip: no `c=' in SDP\n");
return -1;
}
mediaip->s = cp1 + 2;
mediaip->len = eat_line(mediaip->s, body->s + body->len - mediaip->s) - mediaip->s;
trim_len(mediaip->len, mediaip->s, *mediaip);
nextisip = 0;
for (cp = mediaip->s; cp < mediaip->s + mediaip->len;) {
len = eat_token_end(cp, mediaip->s + mediaip->len) - cp;
if (nextisip == 1) {
mediaip->s = cp;
mediaip->len = len;
nextisip++;
break;
}
if (len == 3 && memcmp(cp, "IP", 2) == 0) {
switch (cp[2]) {
case '4':
nextisip = 1;
*pf = AF_INET;
break;
case '6':
nextisip = 1;
*pf = AF_INET6;
break;
default:
break;
}
}
cp = eat_space_end(cp + len, mediaip->s + mediaip->len);
}
if (nextisip != 2 || mediaip->len == 0) {
LOG(L_ERR, "ERROR: extract_mediaip: "
"no `IP[4|6]' in `c=' field\n");
return -1;
}
return 1;
}
/**
* @brief check 'media' matches the value of any 'm=media port value ...' lines
* @return -1 - error; 0 - not found; 1 - found
*/
static int sdp_with_transport(sip_msg_t *msg, str *transport, int like)
{
int sdp_session_num;
int sdp_stream_num;
sdp_session_cell_t* sdp_session;
sdp_stream_cell_t* sdp_stream;
if(parse_sdp(msg) < 0) {
LM_ERR("Unable to parse sdp\n");
return -1;
}
LM_DBG("attempting to search for transport type: [%.*s]\n",
transport->len, transport->s);
sdp_session_num = 0;
for(;;)
{
sdp_session = get_sdp_session(msg, sdp_session_num);
if(!sdp_session) break;
sdp_stream_num = 0;
for(;;)
{
sdp_stream = get_sdp_stream(msg, sdp_session_num, sdp_stream_num);
if(!sdp_stream) break;
LM_DBG("stream %d of %d - transport [%.*s]\n",
sdp_stream_num, sdp_session_num,
sdp_stream->transport.len, sdp_stream->transport.s);
if (like == 0) {
if(transport->len==sdp_stream->transport.len
&& strncasecmp(sdp_stream->transport.s, transport->s,
transport->len)==0)
return 1;
} else {
if (ser_memmem(sdp_stream->transport.s, transport->s,
sdp_stream->transport.len, transport->len)!=NULL)
return 1;
}
sdp_stream_num++;
}
sdp_session_num++;
}
return 0;
}
int extract_sess_version(str* oline, str* sess_version) {
char* cp0 = NULL;
char* cp = NULL;
int len = 0;
char ws = ' ';
int i=0;
/*
"o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5" CR LF
"o=W 1 2 IN IP4 0.0.0.0" CR LF -> 24
"o=W 1 2 IN IP6 ::1" CR LF -> 20
"o=W 1 2 X Y Z" CR LF -> 15
*/
if ( oline->s == NULL || oline->len < 15 )
{
LM_ERR("invalid o -line\n");
return -1;
}
if ( sess_version == NULL )
{
LM_ERR("invalid result pointer\n");
return -1;
}
LM_DBG("oline(%d): >%.*s<\n", oline->len, oline->len, oline->s);
// jump over o=
cp = oline->s + 2;
len = oline->len - 2;
// find whitespace 3 times
do
{
cp0=cp;
//LM_DBG("loop %d: >%.*s<\n", len, len, cp0);
cp = (char*)ser_memmem(cp0, &ws, len, 1);
if ( cp == NULL) { break; }
//LM_DBG("cp0: %p cp: %p (%ld)\n", cp0, cp, cp-cp0);
len-=cp-cp0;
// step over whitespace
if ( len > 0 )
{
cp++;
len--;
}
i++;
} while ( len < oline->len && i < 3 );
len = cp-cp0-1;
LM_DBG("end %d: >%.*s<\n", len, len, cp0);
sess_version->s = cp0;
sess_version->len = len;
if (!isdigit(*cp0))
{
LM_WARN("not digit >%.*s<\n", len, cp0);
}
return 1;
}
int extract_media_attr(str *body, str *mediamedia, str *mediaport, str *mediatransport, str *mediapayload, int *is_rtp)
{
char *cp, *cp1;
int len, i;
cp1 = NULL;
for (cp = body->s; (len = body->s + body->len - cp) > 0;) {
cp1 = (char*)ser_memmem(cp, "m=", len, 2);
if (cp1 == NULL || cp1[-1] == '\n' || cp1[-1] == '\r')
break;
cp = cp1 + 2;
}
if (cp1 == NULL) {
LM_ERR("no `m=' in SDP\n");
return -1;
}
mediaport->s = cp1 + 2; /* skip `m=' */
mediaport->len = eat_line(mediaport->s, body->s + body->len -
mediaport->s) - mediaport->s;
trim_len(mediaport->len, mediaport->s, *mediaport);
mediapayload->len = mediaport->len;
mediamedia->s = mediaport->s;
/* Skip media supertype and spaces after it */
cp = eat_token_end(mediaport->s, mediaport->s + mediaport->len);
mediaport->len -= cp - mediaport->s;
mediamedia->len = mediapayload->len - mediaport->len;
if (mediaport->len <= 0 || cp == mediaport->s) {
LM_ERR("no port in `m='\n");
return -1;
}
mediaport->s = cp;
cp = eat_space_end(mediaport->s, mediaport->s + mediaport->len);
mediaport->len -= cp - mediaport->s;
if (mediaport->len <= 0 || cp == mediaport->s) {
LM_ERR("no port in `m='\n");
return -1;
}
/* Extract port */
mediaport->s = cp;
cp = eat_token_end(mediaport->s, mediaport->s + mediaport->len);
mediatransport->len = mediaport->len - (cp - mediaport->s);
if (mediatransport->len <= 0 || cp == mediaport->s) {
LM_ERR("no port in `m='\n");
return -1;
}
mediatransport->s = cp;
mediaport->len = cp - mediaport->s;
/* Skip spaces after port */
cp = eat_space_end(mediatransport->s, mediatransport->s + mediatransport->len);
mediatransport->len -= cp - mediatransport->s;
if (mediatransport->len <= 0 || cp == mediatransport->s) {
LM_ERR("no protocol type in `m='\n");
return -1;
}
/* Extract protocol type */
mediatransport->s = cp;
cp = eat_token_end(mediatransport->s, mediatransport->s + mediatransport->len);
if (cp == mediatransport->s) {
LM_ERR("no protocol type in `m='\n");
return -1;
}
mediatransport->len = cp - mediatransport->s;
mediapayload->s = mediatransport->s + mediatransport->len;
mediapayload->len -= mediapayload->s - mediamedia->s;
cp = eat_space_end(mediapayload->s, mediapayload->s + mediapayload->len);
mediapayload->len -= cp - mediapayload->s;
mediapayload->s = cp;
for (i = 0; sup_ptypes[i].s != NULL; i++)
if (mediatransport->len == sup_ptypes[i].len &&
strncasecmp(mediatransport->s, sup_ptypes[i].s, mediatransport->len) == 0) {
*is_rtp = sup_ptypes[i].is_rtp;
return 0;
}
/* Unproxyable protocol type. Generally it isn't error. */
return 0;
}
int extract_mediaip(str *body, str *mediaip, int *pf, char *line)
{
char *cp, *cp1;
int len;
cp1 = NULL;
for (cp = body->s; (len = body->s + body->len - cp) > 0;) {
cp1 = (char*)ser_memmem(cp, line, len, 2);
if (cp1 == NULL || cp1[-1] == '\n' || cp1[-1] == '\r')
break;
cp = cp1 + 2;
}
if (cp1 == NULL)
return -1;
mediaip->s = cp1 + 2;
mediaip->len = eat_line(mediaip->s, body->s + body->len - mediaip->s) - mediaip->s;
trim_len(mediaip->len, mediaip->s, *mediaip);
if (mediaip->len == 0) {
LM_ERR("no [%s] line in SDP\n",line);
return -1;
}
/* search reverse for IP[4|6] in c=/o= line */
cp = (char*)ser_memrmem(mediaip->s, " IP", mediaip->len, 3);
if (cp == NULL) {
LM_ERR("no `IP[4|6]' in `%s' field\n",line);
return -1;
}
/* safety checks:
* - for length, at least 6: ' IP[4|6] x...'
* - white space after
*/
if(cp + 6 > mediaip->s + mediaip->len && cp[4]!=' ') {
LM_ERR("invalid content for `%s' line\n",line);
return -1;
}
switch(cp[3]) {
case '4':
*pf = AF_INET;
break;
case '6':
*pf = AF_INET6;
break;
default:
LM_ERR("invalid addrtype IPx for `%s' line\n",line);
return -1;
}
cp += 5;
/* next token is the IP address */
cp = eat_space_end(cp, mediaip->s + mediaip->len);
len = eat_token_end(cp, mediaip->s + mediaip->len) - cp;
mediaip->s = cp;
mediaip->len = len;
if (mediaip->len == 0) {
LM_ERR("no `IP[4|6]' address in `%s' field\n",line);
return -1;
}
LM_DBG("located IP address [%.*s] in `%s' field\n",
mediaip->len, mediaip->s, line);
return 1;
}
/**
* rfc4566:
* a=rtpmap:<payload type> <encoding name>/<clock rate> [/<encoding parameters>]
*/
int extract_rtpmap(str *body,
str *rtpmap_payload, str *rtpmap_encoding, str *rtpmap_clockrate, str *rtpmap_parmas)
{
char *cp, *cp1;
int len;
if (strncasecmp(body->s, "a=rtpmap:", 9) !=0) {
/*LM_DBG("We are not pointing to an a=rtpmap: attribute =>`%.*s'\n", body->len, body->s); */
return -1;
}
cp1 = body->s;
rtpmap_payload->s = cp1 + 9; /* skip `a=rtpmap:' */
rtpmap_payload->len = eat_line(rtpmap_payload->s, body->s + body->len -
rtpmap_payload->s) - rtpmap_payload->s;
trim_len(rtpmap_payload->len, rtpmap_payload->s, *rtpmap_payload);
len = rtpmap_payload->len;
/* */
cp = eat_token_end(rtpmap_payload->s, rtpmap_payload->s + rtpmap_payload->len);
rtpmap_payload->len = cp - rtpmap_payload->s;
if (rtpmap_payload->len <= 0 || cp == rtpmap_payload->s) {
LM_ERR("no encoding in `a=rtpmap'\n");
return -1;
}
len -= rtpmap_payload->len;
rtpmap_encoding->s = cp;
cp = eat_space_end(rtpmap_encoding->s, rtpmap_encoding->s + len);
len -= cp - rtpmap_encoding->s;
if (len <= 0 || cp == rtpmap_encoding->s) {
LM_ERR("no encoding in `a=rtpmap:'\n");
return -1;
}
rtpmap_encoding->s = cp;
cp1 = (char*)ser_memmem(cp, "/", len, 1);
if(cp1==NULL) {
LM_ERR("invalid encoding in `a=rtpmap' at [%.*s]\n", len, cp);
return -1;
}
len -= cp1 - cp;
rtpmap_encoding->len = cp1 - cp;
cp = cp1+1; /* skip '/' */
len--;
rtpmap_clockrate->s = cp;
cp1 = (char*)ser_memmem(cp, "/", len, 1);
if(cp1==NULL) {
/* no encoding parameters */
rtpmap_clockrate->len = len;
rtpmap_parmas->s = NULL;
rtpmap_parmas->len = 0;
return 0;
}
rtpmap_clockrate->len = cp1 - cp;
len -= cp1 - cp;
rtpmap_parmas->s = cp1 + 1; /* skip '/' */
rtpmap_parmas->len = len - 1;
return 0;
}
static int
force_rtp_proxy2_f(struct sip_msg* msg, char* str1, char* str2)
{
str body, body1, oldport, oldip, newport, newip;
str callid, from_tag, to_tag, tmp;
int create, port, len, asymmetric, flookup, argc, proxied, real;
int oidx, pf=0, pf1, force, node_idx;
char opts[16];
char *cp, *cp1;
char *cpend, *next;
char **ap, *argv[10];
struct lump* anchor;
struct rtpp_node *node;
struct iovec v[14] = {
{NULL, 0}, /* command */
{NULL, 0}, /* options */
{" ", 1}, /* separator */
{NULL, 0}, /* callid */
{" ", 1}, /* separator */
{NULL, 7}, /* newip */
{" ", 1}, /* separator */
{NULL, 1}, /* oldport */
{" ", 1}, /* separator */
{NULL, 0}, /* from_tag */
{";", 1}, /* separator */
{NULL, 0}, /* medianum */
{" ", 1}, /* separator */
{NULL, 0} /* to_tag */
};
char *v1p, *v2p, *c1p, *c2p, *m1p, *m2p, *bodylimit;
char medianum_buf[20];
int medianum, media_multi;
str medianum_str, tmpstr1;
int c1p_altered;
v[1].iov_base=opts;
asymmetric = flookup = force = real = 0;
oidx = 1;
node_idx = -1;
for (cp = str1; *cp != '\0'; cp++) {
switch (*cp) {
case ' ':
case '\t':
break;
case 'a':
case 'A':
opts[oidx++] = 'A';
asymmetric = 1;
real = 1;
break;
case 'i':
case 'I':
opts[oidx++] = 'I';
break;
case 'e':
case 'E':
opts[oidx++] = 'E';
break;
case 'l':
case 'L':
flookup = 1;
break;
case 'f':
case 'F':
force = 1;
break;
case 'r':
case 'R':
real = 1;
break;
case 'n':
case 'N':
cp++;
for (len = 0; isdigit(cp[len]); len++)
continue;
if (len == 0) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: non-negative integer"
"should follow N option\n");
return -1;
}
node_idx = strtoul(cp, NULL, 10);
cp += len - 1;
break;
default:
LOG(L_ERR, "ERROR: force_rtp_proxy2: unknown option `%c'\n", *cp);
return -1;
}
}
if (msg->first_line.type == SIP_REQUEST &&
msg->first_line.u.request.method_value == METHOD_INVITE) {
create = 1;
} else if (msg->first_line.type == SIP_REPLY) {
create = 0;
} else {
return -1;
}
/* extract_body will also parse all the headers in the message as
* a side effect => don't move get_callid/get_to_tag in front of it
* -- andrei */
if (extract_body(msg, &body) == -1) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't extract body "
"from the message\n");
return -1;
}
if (get_callid(msg, &callid) == -1 || callid.len == 0) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't get Call-Id field\n");
return -1;
}
if (get_to_tag(msg, &to_tag) == -1) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't get To tag\n");
return -1;
}
if (get_from_tag(msg, &from_tag) == -1 || from_tag.len == 0) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't get From tag\n");
return -1;
}
if (flookup != 0) {
if (create == 0 || to_tag.len == 0)
return -1;
create = 0;
tmp = from_tag;
from_tag = to_tag;
to_tag = tmp;
}
proxied = 0;
for (cp = body.s; (len = body.s + body.len - cp) >= ANORTPPROXY_LEN;) {
cp1 = ser_memmem(cp, ANORTPPROXY, len, ANORTPPROXY_LEN);
if (cp1 == NULL)
break;
if (cp1[-1] == '\n' || cp1[-1] == '\r') {
proxied = 1;
break;
}
cp = cp1 + ANORTPPROXY_LEN;
}
if (proxied != 0 && force == 0)
return -1;
/*
* Parsing of SDP body.
* It can contain a few session descriptions (each starts with
* v-line), and each session may contain a few media descriptions
* (each starts with m-line).
* We have to change ports in m-lines, and also change IP addresses in
* c-lines which can be placed either in session header (fallback for
* all medias) or media description.
* Ports should be allocated for any media. IPs all should be changed
* to the same value (RTP proxy IP), so we can change all c-lines
* unconditionally.
*/
bodylimit = body.s + body.len;
v1p = find_sdp_line(body.s, bodylimit, 'v');
if (v1p == NULL) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: no sessions in SDP\n");
return -1;
}
v2p = find_next_sdp_line(v1p, bodylimit, 'v', bodylimit);
media_multi = (v2p != bodylimit);
v2p = v1p;
medianum = 0;
for(;;) {
/* Per-session iteration. */
v1p = v2p;
if (v1p == NULL || v1p >= bodylimit)
break; /* No sessions left */
v2p = find_next_sdp_line(v1p, bodylimit, 'v', bodylimit);
/* v2p is text limit for session parsing. */
m1p = find_sdp_line(v1p, v2p, 'm');
/* Have this session media description? */
if (m1p == NULL) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: no m= in session\n");
return -1;
}
/*
* Find c1p only between session begin and first media.
* c1p will give common c= for all medias.
*/
c1p = find_sdp_line(v1p, m1p, 'c');
c1p_altered = 0;
/* Have session. Iterate media descriptions in session */
m2p = m1p;
for (;;) {
m1p = m2p;
if (m1p == NULL || m1p >= v2p)
break;
m2p = find_next_sdp_line(m1p, v2p, 'm', v2p);
/* c2p will point to per-media "c=" */
c2p = find_sdp_line(m1p, m2p, 'c');
/* Extract address and port */
tmpstr1.s = c2p ? c2p : c1p;
if (tmpstr1.s == NULL) {
/* No "c=" */
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't"
" find media IP in the message\n");
return -1;
}
tmpstr1.len = v2p - tmpstr1.s; /* limit is session limit text */
if (extract_mediaip(&tmpstr1, &oldip, &pf) == -1) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't"
" extract media IP from the message\n");
return -1;
}
tmpstr1.s = m1p;
tmpstr1.len = m2p - m1p;
if (extract_mediaport(&tmpstr1, &oldport) == -1) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: can't"
" extract media port from the message\n");
return -1;
}
++medianum;
if (asymmetric != 0 || real != 0) {
newip = oldip;
} else {
newip.s = ip_addr2a(&msg->rcv.src_ip);
newip.len = strlen(newip.s);
}
/* XXX must compare address families in all addresses */
if (pf == AF_INET6) {
opts[oidx] = '6';
oidx++;
}
snprintf(medianum_buf, sizeof medianum_buf, "%d", medianum);
medianum_str.s = medianum_buf;
medianum_str.len = strlen(medianum_buf);
opts[0] = (create == 0) ? 'L' : 'U';
v[1].iov_len = oidx;
STR2IOVEC(callid, v[3]);
STR2IOVEC(newip, v[5]);
STR2IOVEC(oldport, v[7]);
STR2IOVEC(from_tag, v[9]);
if (1 || media_multi) /* XXX netch: can't choose now*/
{
STR2IOVEC(medianum_str, v[11]);
} else {
v[10].iov_len = v[11].iov_len = 0;
}
STR2IOVEC(to_tag, v[13]);
do {
node = select_rtpp_node(callid, 1, node_idx);
if (!node) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: no available proxies\n");
return -1;
}
cp = send_rtpp_command(node, v, (to_tag.len > 0) ? 14 : 12);
} while (cp == NULL);
/* Parse proxy reply to <argc,argv> */
argc = 0;
memset(argv, 0, sizeof(argv));
cpend=cp+strlen(cp);
next=eat_token_end(cp, cpend);
for (ap = argv; cp<cpend; cp=next+1, next=eat_token_end(cp, cpend)){
*next=0;
if (*cp != '\0') {
*ap=cp;
argc++;
if ((char*)++ap >= ((char*)argv+sizeof(argv)))
break;
}
}
if (argc < 1) {
LOG(L_ERR, "force_rtp_proxy2: no reply from rtp proxy\n");
return -1;
}
port = atoi(argv[0]);
if (port <= 0 || port > 65535) {
LOG(L_ERR, "force_rtp_proxy2: incorrect port in reply from rtp proxy\n");
return -1;
}
pf1 = (argc >= 3 && argv[2][0] == '6') ? AF_INET6 : AF_INET;
if (isnulladdr(&oldip, pf)) {
if (pf1 == AF_INET6) {
newip.s = "::";
newip.len = 2;
} else {
newip.s = "0.0.0.0";
newip.len = 7;
}
} else {
newip.s = (argc < 2) ? str2 : argv[1];
newip.len = strlen(newip.s);
}
newport.s = int2str(port, &newport.len); /* beware static buffer */
/* Alter port. */
body1.s = m1p;
body1.len = bodylimit - body1.s;
if (alter_mediaport(msg, &body1, &oldport, &newport, 0) == -1)
return -1;
/*
* Alter IP. Don't alter IP common for the session
* more than once.
*/
if (c2p != NULL || !c1p_altered) {
body1.s = c2p ? c2p : c1p;
body1.len = bodylimit - body1.s;
if (alter_mediaip(msg, &body1, &oldip, pf, &newip, pf1, 0) == -1)
return -1;
if (!c2p)
c1p_altered = 1;
}
} /* Iterate medias in session */
} /* Iterate sessions */
if (proxied == 0) {
cp = pkg_malloc(ANORTPPROXY_LEN * sizeof(char));
if (cp == NULL) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: out of memory\n");
return -1;
}
anchor = anchor_lump(msg, body.s + body.len - msg->buf, 0, 0);
if (anchor == NULL) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: anchor_lump failed\n");
pkg_free(cp);
return -1;
}
memcpy(cp, ANORTPPROXY, ANORTPPROXY_LEN);
if (insert_new_lump_after(anchor, cp, ANORTPPROXY_LEN, 0) == NULL) {
LOG(L_ERR, "ERROR: force_rtp_proxy2: insert_new_lump_after failed\n");
pkg_free(cp);
return -1;
}
}
return 1;
}
static int extract_mediaport(str *body, str *mediaport)
{
char *cp, *cp1;
int len, i;
str ptype;
cp1 = NULL;
for (cp = body->s; (len = body->s + body->len - cp) > 0;) {
cp1 = ser_memmem(cp, "m=", len, 2);
if (cp1 == NULL || cp1[-1] == '\n' || cp1[-1] == '\r')
break;
cp = cp1 + 2;
}
if (cp1 == NULL) {
LOG(L_ERR, "ERROR: extract_mediaport: no `m=' in SDP\n");
return -1;
}
mediaport->s = cp1 + 2; /* skip `m=' */
mediaport->len = eat_line(mediaport->s, body->s + body->len -
mediaport->s) - mediaport->s;
trim_len(mediaport->len, mediaport->s, *mediaport);
/* Skip media supertype and spaces after it */
cp = eat_token_end(mediaport->s, mediaport->s + mediaport->len);
mediaport->len -= cp - mediaport->s;
if (mediaport->len <= 0 || cp == mediaport->s) {
LOG(L_ERR, "ERROR: extract_mediaport: no port in `m='\n");
return -1;
}
mediaport->s = cp;
cp = eat_space_end(mediaport->s, mediaport->s + mediaport->len);
mediaport->len -= cp - mediaport->s;
if (mediaport->len <= 0 || cp == mediaport->s) {
LOG(L_ERR, "ERROR: extract_mediaport: no port in `m='\n");
return -1;
}
/* Extract port */
mediaport->s = cp;
cp = eat_token_end(mediaport->s, mediaport->s + mediaport->len);
ptype.len = mediaport->len - (cp - mediaport->s);
if (ptype.len <= 0 || cp == mediaport->s) {
LOG(L_ERR, "ERROR: extract_mediaport: no port in `m='\n");
return -1;
}
ptype.s = cp;
mediaport->len = cp - mediaport->s;
/* Skip spaces after port */
cp = eat_space_end(ptype.s, ptype.s + ptype.len);
ptype.len -= cp - ptype.s;
if (ptype.len <= 0 || cp == ptype.s) {
LOG(L_ERR, "ERROR: extract_mediaport: no protocol type in `m='\n");
return -1;
}
/* Extract protocol type */
ptype.s = cp;
cp = eat_token_end(ptype.s, ptype.s + ptype.len);
if (cp == ptype.s) {
LOG(L_ERR, "ERROR: extract_mediaport: no protocol type in `m='\n");
return -1;
}
ptype.len = cp - ptype.s;
for (i = 0; sup_ptypes[i].s != NULL; i++)
if (ptype.len == sup_ptypes[i].len &&
strncasecmp(ptype.s, sup_ptypes[i].s, ptype.len) == 0)
return 0;
/* Unproxyable protocol type. Generally it isn't error. */
return -1;
}