int via_diff(struct sip_msg *req,struct sip_msg *resp)
{
struct hdr_field *hf;
struct via_body *vb;
int i,j,k;
i=j=k=0;
/* count how many via bodies come in the response*/
for(hf=resp->h_via1;hf;hf=next_sibling_hdr(hf)){
if(!hf->parsed){
if((vb=pkg_malloc(sizeof(struct via_body)))==0){
LM_ERR("Out of mem in via_diff!!\n");
return -1;
}
memset(vb,0,sizeof(struct via_body));
if(parse_via(hf->body.s,hf->body.s+hf->body.len+1,vb)==0){
LM_ERR("Unable to parse via in via_diff!\n");
pkg_free(vb);
return -1;
}
hf->parsed=vb;
j=1;
}
for(vb=hf->parsed;vb;vb=vb->next){
i++;
}
if(j){
free_via_list((struct via_body*)hf->parsed);
hf->parsed=NULL;
j=0;
}
}
j=0;
/* count how many via bodies were in the orig. request*/
for(hf=req->h_via1;hf;hf=next_sibling_hdr(hf)){
if(!hf->parsed){
if((vb=pkg_malloc(sizeof(struct via_body)))==0){
goto error;
}
memset(vb,0,sizeof(struct via_body));
if(parse_via(hf->body.s,hf->body.s+hf->body.len+1,vb)==0){
goto error;
}
hf->parsed=vb;
j=1;
}
for(vb=hf->parsed;vb;vb=vb->next){
k++;
}
if(j){
free_via_list((struct via_body*)hf->parsed);
hf->parsed=NULL;
j=0;
}
}
return i-k;
error:
return -1;
}
/* returns pointer to next header line, and fill hdr_f ;
* if at end of header returns pointer to the last crlf (always buf)*/
char* get_hdr_field(char* const buf, char* const end, struct hdr_field* const hdr)
{
char *tmp = 0;
char *match;
struct via_body *vb;
struct cseq_body* cseq_b;
struct to_body* to_b;
int integer, err;
unsigned uval;
if(!buf) {
DBG("null buffer pointer\n");
goto error;
}
if ((*buf)=='\n' || (*buf)=='\r') {
/* double crlf or lflf or crcr */
DBG("found end of header\n");
hdr->type=HDR_EOH_T;
return buf;
}
tmp=parse_hname(buf, end, hdr);
if (hdr->type==HDR_ERROR_T) {
LOG(L_ERR, "ERROR: get_hdr_field: bad header\n");
goto error;
}
/* eliminate leading whitespace */
tmp=eat_lws_end(tmp, end);
if (tmp>=end) {
LOG(L_ERR, "ERROR: get_hdr_field: HF empty\n");
goto error;
}
/* if header-field well-known, parse it, find its end otherwise ;
* after leaving the hdr->type switch, tmp should be set to the
* next header field
*/
switch(hdr->type) {
case HDR_VIA_T:
/* keep number of vias parsed -- we want to report it in
replies for diagnostic purposes */
via_cnt++;
vb=pkg_malloc(sizeof(struct via_body));
if (vb==0) {
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(vb,0,sizeof(struct via_body));
hdr->body.s=tmp;
tmp=parse_via(tmp, end, vb);
if (vb->error==PARSE_ERROR) {
LOG(L_ERR, "ERROR: get_hdr_field: bad via\n");
free_via_list(vb);
goto error;
}
hdr->parsed=vb;
vb->hdr.s=hdr->name.s;
vb->hdr.len=hdr->name.len;
hdr->body.len=tmp-hdr->body.s;
break;
case HDR_CSEQ_T:
cseq_b=pkg_malloc(sizeof(struct cseq_body));
if (cseq_b==0) {
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(cseq_b, 0, sizeof(struct cseq_body));
hdr->body.s=tmp;
tmp=parse_cseq(tmp, end, cseq_b);
if (cseq_b->error==PARSE_ERROR) {
LOG(L_ERR, "ERROR: get_hdr_field: bad cseq\n");
free_cseq(cseq_b);
goto error;
}
hdr->parsed=cseq_b;
hdr->body.len=tmp-hdr->body.s;
DBG("get_hdr_field: cseq <%.*s>: <%.*s> <%.*s>\n",
hdr->name.len, ZSW(hdr->name.s),
cseq_b->number.len, ZSW(cseq_b->number.s),
cseq_b->method.len, cseq_b->method.s);
break;
case HDR_TO_T:
to_b=pkg_malloc(sizeof(struct to_body));
if (to_b==0) {
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(to_b, 0, sizeof(struct to_body));
hdr->body.s=tmp;
tmp=parse_to(tmp, end,to_b);
if (to_b->error==PARSE_ERROR) {
LOG(L_ERR, "ERROR: get_hdr_field: bad to header\n");
free_to(to_b);
goto error;
}
hdr->parsed=to_b;
hdr->body.len=tmp-hdr->body.s;
DBG("DEBUG: get_hdr_field: <%.*s> [%d]; uri=[%.*s] \n",
hdr->name.len, ZSW(hdr->name.s),
hdr->body.len, to_b->uri.len,ZSW(to_b->uri.s));
DBG("DEBUG: to body [%.*s]\n",to_b->body.len,
ZSW(to_b->body.s));
break;
case HDR_CONTENTLENGTH_T:
hdr->body.s=tmp;
tmp=parse_content_length(tmp,end, &integer);
if (tmp==0) {
LOG(L_ERR, "ERROR:get_hdr_field: bad content_length header\n");
goto error;
}
hdr->parsed=(void*)(long)integer;
hdr->body.len=tmp-hdr->body.s;
DBG("DEBUG: get_hdr_body : content_length=%d\n",
(int)(long)hdr->parsed);
break;
case HDR_RETRY_AFTER_T:
hdr->body.s=tmp;
tmp=parse_retry_after(tmp,end, &uval, &err);
if (err) {
LOG(L_ERR, "ERROR:get_hdr_field: bad retry_after header\n");
goto error;
}
hdr->parsed=(void*)(unsigned long)uval;
hdr->body.len=tmp-hdr->body.s;
DBG("DEBUG: get_hdr_body : retry_after=%d\n",
(unsigned)(long)hdr->parsed);
break;
case HDR_IDENTITY_T:
case HDR_DATE_T:
case HDR_IDENTITY_INFO_T:
case HDR_SUPPORTED_T:
case HDR_REQUIRE_T:
case HDR_CONTENTTYPE_T:
case HDR_FROM_T:
case HDR_CALLID_T:
case HDR_CONTACT_T:
case HDR_ROUTE_T:
case HDR_RECORDROUTE_T:
case HDR_MAXFORWARDS_T:
case HDR_AUTHORIZATION_T:
case HDR_EXPIRES_T:
case HDR_PROXYAUTH_T:
case HDR_PROXYREQUIRE_T:
case HDR_UNSUPPORTED_T:
case HDR_ALLOW_T:
case HDR_EVENT_T:
case HDR_ACCEPT_T:
case HDR_ACCEPTLANGUAGE_T:
case HDR_ORGANIZATION_T:
case HDR_PRIORITY_T:
case HDR_SUBJECT_T:
case HDR_USERAGENT_T:
case HDR_SERVER_T:
case HDR_CONTENTDISPOSITION_T:
case HDR_DIVERSION_T:
case HDR_RPID_T:
case HDR_SIPIFMATCH_T:
case HDR_REFER_TO_T:
case HDR_SESSIONEXPIRES_T:
case HDR_MIN_SE_T:
case HDR_SUBSCRIPTION_STATE_T:
case HDR_ACCEPTCONTACT_T:
case HDR_ALLOWEVENTS_T:
case HDR_CONTENTENCODING_T:
case HDR_REFERREDBY_T:
case HDR_REJECTCONTACT_T:
case HDR_REQUESTDISPOSITION_T:
case HDR_WWW_AUTHENTICATE_T:
case HDR_PROXY_AUTHENTICATE_T:
case HDR_PATH_T:
case HDR_PRIVACY_T:
case HDR_PAI_T:
case HDR_PPI_T:
case HDR_REASON_T:
case HDR_OTHER_T:
/* just skip over it */
hdr->body.s=tmp;
/* find end of header */
/* find lf */
do {
match=q_memchr(tmp, '\n', end-tmp);
if (match) {
match++;
} else {
LOG(L_ERR,
"ERROR: get_hdr_field: bad body for <%s>(%d)\n",
hdr->name.s, hdr->type);
/* abort(); */
tmp=end;
goto error;
}
tmp=match;
} while( match<end &&( (*match==' ')||(*match=='\t') ) );
tmp=match;
hdr->body.len=match-hdr->body.s;
break;
default:
LOG(L_CRIT, "BUG: get_hdr_field: unknown header type %d\n",
hdr->type);
goto error;
}
/* jku: if \r covered by current length, shrink it */
trim_r( hdr->body );
hdr->len=tmp-hdr->name.s;
return tmp;
error:
DBG("get_hdr_field: error exit\n");
STATS_BAD_MSG_HDR();
hdr->type=HDR_ERROR_T;
hdr->len=tmp-hdr->name.s;
return tmp;
}
/*
* Create a fake topmost Via header field because HTTP clients
* do not generate Vias
*/
static int insert_fake_via(struct sip_msg* msg, char* via, int via_len)
{
struct via_body* vb = 0;
via_cnt++;
vb = pkg_malloc(sizeof(struct via_body));
if (vb == 0){
ERR("insert_fake_via: Out of memory\n");
goto error;
}
msg->h_via1 = pkg_malloc(sizeof(struct hdr_field));
if (!msg->h_via1) {
ERR("No memory left\n");
goto error;
}
memset(msg->h_via1, 0, sizeof(struct hdr_field));
memset(vb, 0, sizeof(struct via_body));
/* FIXME: The code below would break if the VIA prefix
* gets changed in config.h
*/
msg->h_via1->name.s = via;
msg->h_via1->name.len = 3;
msg->h_via1->body.s = via + 5;
msg->h_via1->body.len = via_len - 5 - CRLF_LEN;
msg->h_via1->type = HDR_VIA_T;
msg->h_via1->parsed = vb;
/* This field is used by the msg translator to add a new
* via when forwarding the request. It must point to an existing
* header field because otherwise call to anchor_lump, which does
* hdr.s - buf, would crash
*/
vb->hdr.s = msg->headers->name.s;
vb->hdr.len = 0;
msg->via1 = vb;
/* We have to replace the zero terminating character right behind
* CRLF because otherwise the parser will return an error.
* It expects that there is either a next header field or another
* CRLF delimiter
*/
via[via_len] = 'a';
parse_via(via + 5, via + via_len + 1, vb);
if (vb->error == PARSE_ERROR){
ERR("Bad via\n");
goto error;
}
if (msg->last_header == 0) {
msg->headers = msg->h_via1;
msg->last_header = msg->h_via1;
} else {
msg->last_header->next = msg->h_via1;
msg->last_header = msg->h_via1;
}
return 0;
error:
if (vb) {
free_via_list(vb);
pkg_free(vb);
}
if (msg->h_via1) pkg_free(msg->h_via1);
return -1;
}
int th_unmask_via(sip_msg_t *msg, str *cookie)
{
hdr_field_t *hdr;
struct via_body *via;
struct via_body *via2;
struct via_param *vp;
struct lump* l;
int i;
str out;
int vlen;
i=0;
for(hdr=msg->h_via1; hdr; hdr=next_sibling_hdr(hdr))
{
for(via=(struct via_body*)hdr->parsed; via; via=via->next)
{
i++;
LM_DBG("=======via[%d]\n", i);
LM_DBG("hdr: [%.*s]\n", via->hdr.len, via->hdr.s);
vlen = th_skip_rw(via->name.s, via->bsize);
LM_DBG("body: %d: [%.*s]\n", vlen, vlen, via->name.s);
if(i!=1)
{
vp = th_get_via_param(via, &th_vparam_name);
if(vp==NULL)
{
LM_ERR("cannot find param in via %d\n", i);
return -1;
}
if(i==2)
out.s = th_mask_decode(vp->value.s, vp->value.len,
&th_vparam_prefix, CRLF_LEN+1, &out.len);
else
out.s = th_mask_decode(vp->value.s, vp->value.len,
&th_vparam_prefix, 0, &out.len);
if(out.s==NULL)
{
LM_ERR("cannot encode via %d\n", i);
return -1;
}
LM_DBG("+body: %d: [%.*s]\n", out.len, out.len, out.s);
if(i==2)
{
via2=pkg_malloc(sizeof(struct via_body));
if (via2==0)
{
LM_ERR("out of memory\n");
pkg_free(out.s);
return -1;
}
memset(via2, 0, sizeof(struct via_body));
memcpy(out.s+out.len, CRLF, CRLF_LEN);
out.s[out.len+CRLF_LEN]='X';
if(parse_via(out.s, out.s+out.len+CRLF_LEN+1, via2)==NULL)
{
LM_ERR("error parsing decoded via2\n");
free_via_list(via2);
pkg_free(out.s);
return -1;
}
out.s[out.len] = '\0';
vp = th_get_via_param(via2, &th_cookie_name);
if(vp==NULL)
{
LM_ERR("cannot find cookie in via2\n");
free_via_list(via2);
pkg_free(out.s);
return -1;
}
*cookie = vp->value;
free_via_list(via2);
}
l=del_lump(msg, via->name.s-msg->buf, vlen, 0);
if (l==0)
{
LM_ERR("failed deleting via [%d]\n", i);
pkg_free(out.s);
return -1;
}
if (insert_new_lump_after(l, out.s, out.len, 0)==0)
{
LM_ERR("could not insert new lump\n");
pkg_free(out.s);
return -1;
}
}
}
}
return 0;
}
/* returns pointer to next header line, and fill hdr_f ;
* if at end of header returns pointer to the last crlf (always buf)*/
char* get_hdr_field(char* buf, char* end, struct hdr_field* hdr)
{
char* tmp;
char *match;
struct via_body *vb;
struct cseq_body* cseq_b;
struct to_body* to_b;
int integer;
if ((*buf)=='\n' || (*buf)=='\r'){
/* double crlf or lflf or crcr */
LM_DBG("found end of header\n");
hdr->type=HDR_EOH_T;
return buf;
}
tmp=parse_hname(buf, end, hdr);
if (hdr->type==HDR_ERROR_T){
LM_ERR("bad header\n");
goto error_bad_hdr;
}
/* eliminate leading whitespace */
tmp=eat_lws_end(tmp, end);
if (tmp>=end) {
LM_ERR("hf empty\n");
goto error_bad_hdr;
}
/* if header-field well-known, parse it, find its end otherwise ;
* after leaving the hdr->type switch, tmp should be set to the
* next header field
*/
switch(hdr->type){
case HDR_VIA_T:
/* keep number of vias parsed -- we want to report it in
replies for diagnostic purposes */
via_cnt++;
vb=pkg_malloc(sizeof(struct via_body));
if (vb==0){
LM_ERR("out of pkg memory\n");
goto error;
}
memset(vb,0,sizeof(struct via_body));
hdr->body.s=tmp;
tmp=parse_via(tmp, end, vb);
if (vb->error==PARSE_ERROR){
LM_ERR("bad via\n");
free_via_list(vb);
set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,
"error parsing Via");
set_err_reply(400, "bad Via header");
goto error;
}
hdr->parsed=vb;
vb->hdr.s=hdr->name.s;
vb->hdr.len=hdr->name.len;
hdr->body.len=tmp-hdr->body.s;
break;
case HDR_CSEQ_T:
cseq_b=pkg_malloc(sizeof(struct cseq_body));
if (cseq_b==0){
LM_ERR("out of pkg memory\n");
goto error;
}
memset(cseq_b, 0, sizeof(struct cseq_body));
hdr->body.s=tmp;
tmp=parse_cseq(tmp, end, cseq_b);
if (cseq_b->error==PARSE_ERROR){
LM_ERR("bad cseq\n");
pkg_free(cseq_b);
set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,
"error parsing CSeq`");
set_err_reply(400, "bad CSeq header");
goto error;
}
hdr->parsed=cseq_b;
hdr->body.len=tmp-hdr->body.s;
LM_DBG("cseq <%.*s>: <%.*s> <%.*s>\n",
hdr->name.len, ZSW(hdr->name.s),
cseq_b->number.len, ZSW(cseq_b->number.s),
cseq_b->method.len, cseq_b->method.s);
break;
case HDR_TO_T:
to_b=pkg_malloc(sizeof(struct to_body));
if (to_b==0){
LM_ERR("out of pkg memory\n");
goto error;
}
memset(to_b, 0, sizeof(struct to_body));
hdr->body.s=tmp;
tmp=parse_to(tmp, end,to_b);
if (to_b->error==PARSE_ERROR){
LM_ERR("bad to header\n");
pkg_free(to_b);
set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,
"error parsing To header");
set_err_reply(400, "bad header");
goto error;
}
hdr->parsed=to_b;
hdr->body.len=tmp-hdr->body.s;
LM_DBG("<%.*s> [%d]; uri=[%.*s] \n",
hdr->name.len, ZSW(hdr->name.s),
hdr->body.len, to_b->uri.len,ZSW(to_b->uri.s));
LM_DBG("to body [%.*s]\n",to_b->body.len, ZSW(to_b->body.s));
break;
case HDR_CONTENTLENGTH_T:
hdr->body.s=tmp;
tmp=parse_content_length(tmp,end, &integer);
if (tmp==0){
LM_ERR("bad content_length header\n");
set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,
"error parsing Content-Length");
set_err_reply(400, "bad Content-Length header");
goto error;
}
hdr->parsed=(void*)(long)integer;
hdr->body.len=tmp-hdr->body.s;
LM_DBG("content_length=%d\n", (int)(long)hdr->parsed);
break;
case HDR_SUPPORTED_T:
case HDR_CONTENTTYPE_T:
case HDR_FROM_T:
case HDR_CALLID_T:
case HDR_CONTACT_T:
case HDR_ROUTE_T:
case HDR_RECORDROUTE_T:
case HDR_PATH_T:
case HDR_MAXFORWARDS_T:
case HDR_AUTHORIZATION_T:
case HDR_EXPIRES_T:
case HDR_PROXYAUTH_T:
case HDR_PROXYREQUIRE_T:
case HDR_UNSUPPORTED_T:
case HDR_ALLOW_T:
case HDR_EVENT_T:
case HDR_ACCEPT_T:
case HDR_ACCEPTLANGUAGE_T:
case HDR_ORGANIZATION_T:
case HDR_PRIORITY_T:
case HDR_SUBJECT_T:
case HDR_USERAGENT_T:
case HDR_CONTENTDISPOSITION_T:
case HDR_ACCEPTDISPOSITION_T:
case HDR_DIVERSION_T:
case HDR_RPID_T:
case HDR_REFER_TO_T:
case HDR_SESSION_EXPIRES_T:
case HDR_MIN_SE_T:
case HDR_MIN_EXPIRES_T:
case HDR_PPI_T:
case HDR_PAI_T:
case HDR_PRIVACY_T:
case HDR_RETRY_AFTER_T:
case HDR_CALL_INFO_T:
case HDR_WWW_AUTHENTICATE_T:
case HDR_PROXY_AUTHENTICATE_T:
case HDR_OTHER_T:
/* just skip over it */
hdr->body.s=tmp;
/* find end of header */
/* find lf */
do{
match=q_memchr(tmp, '\n', end-tmp);
if (match){
match++;
}else {
LM_ERR("bad body for <%s>(%d)\n", hdr->name.s, hdr->type);
tmp=end;
goto error_bad_hdr;
}
tmp=match;
}while( match<end &&( (*match==' ')||(*match=='\t') ) );
tmp=match;
hdr->body.len=match-hdr->body.s;
break;
default:
LM_CRIT("unknown header type %d\n", hdr->type);
goto error;
}
/* jku: if \r covered by current length, shrink it */
trim_r( hdr->body );
hdr->len=tmp-hdr->name.s;
return tmp;
error_bad_hdr:
set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,
"error parsing headers");
set_err_reply(400, "bad headers");
error:
LM_DBG("error exit\n");
update_stat( bad_msg_hdr, 1);
hdr->type=HDR_ERROR_T;
hdr->len=tmp-hdr->name.s;
return tmp;
}
/*
* This function encodes an arbitrary header into a chunk of bytes,
* ready to be sent to the Application Server.
*
* The header codes start with this encoded-bytes:
* 2: SIP-MSG-START based pointer to the header (including header name)
* 2: length of the header
* 1: length of the header name
*/
int encode_header(struct sip_msg *sipmsg,struct hdr_field *hdr,unsigned char *payload,int paylen)
{
int len=0;
unsigned int integer,*methods=0;
char *hdrstart,*tmp;
unsigned short int ptr;
struct to_body *tobody=0;
struct via_body *viabody=0;
struct cseq_body *cseqbody=0;
char *msg,*myerror;
int mlen;
msg=sipmsg->buf;
mlen=sipmsg->len;
hdrstart = hdr->name.s;
if(hdrstart-msg<0){
LM_ERR("header(%.*s) does not belong to sip_msg(hdrstart<msg)\n",
hdr->name.len,hdr->name.s);
return -1;
}
ptr=htons((short int)(hdrstart-msg));
if((hdrstart-msg)>mlen){
LM_ERR("out of the sip_msg bounds (%d>%d)\n",ntohs(ptr),mlen);
return -1;
}
if(hdr->len>(1<<16)){
LM_ERR("length of header too long\n");
return -1;
}
memcpy(payload,&ptr,2);
ptr=htons((short int)(hdr->len));
memcpy(payload+HEADER_LEN_IDX,&ptr,2);
payload[HEADER_NAME_LEN_IDX]=(unsigned char)hdr->name.len;
switch(hdr->type){
case HDR_FROM_T:
case HDR_TO_T:
case HDR_REFER_TO_T:
case HDR_RPID_T:
if(!hdr->parsed){
if((tobody=pkg_malloc(sizeof(struct to_body)))==0){
myerror="Out of memory !!\n";
goto error;
}
parse_to(hdr->body.s,hdr->body.s+hdr->body.len+1,tobody);
if (tobody->error == PARSE_ERROR) {
myerror="bad (REFER,TO,FROM,RPID) header\n";
pkg_free(tobody);
return 5;
goto error;
}
hdr->parsed=(struct to_body*)tobody;
}else
tobody=(struct to_body*)hdr->parsed;
if((len=encode_to_body(hdr->name.s,hdr->len,tobody,payload+5))<0){
myerror="parsing from or to header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_CONTACT_T:
if(!hdr->parsed)
if(parse_contact(hdr)<0){
myerror="parsing contact\n";
goto error;
}
if((len=encode_contact_body(hdr->name.s,hdr->len,(contact_body_t*)hdr->parsed,payload+5))<0){
myerror="encoding contact header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_ROUTE_T:
case HDR_RECORDROUTE_T:
if(!hdr->parsed)
if(parse_rr(hdr)<0){
myerror="encoding route or recordroute\n";
goto error;
}
if((len=encode_route_body(hdr->name.s,hdr->len,(rr_t*)hdr->parsed,payload+5))<0){
myerror="encoding route or recordroute header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_CONTENTLENGTH_T:
if(!hdr->parsed){
tmp=parse_content_length(hdr->body.s,hdr->body.s+hdr->body.len+1,(int*)&integer);
if (tmp==0){
myerror="bad content_length header\n";
goto error;
}
hdr->parsed=(void*)(long)integer;
}
if((len=encode_contentlength(hdr->name.s,hdr->len,(long int)hdr->parsed,(char*)(payload+5)))<0){
myerror="encoding content-length header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_VIA_T:
if(!hdr->parsed){
if((viabody=pkg_malloc(sizeof(struct via_body)))==0){
myerror="out of memory\n";
goto error;
}
memset(viabody,0,sizeof(struct via_body));
if(parse_via(hdr->body.s,hdr->body.s+hdr->body.len+1,viabody)==0){
myerror="encoding via \n";
goto error;
}
hdr->parsed=viabody;
}
if((len=encode_via_body(hdr->name.s,hdr->len,(struct via_body*)hdr->parsed,payload+5))<0){
myerror="encoding via header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_ACCEPT_T:
if(!hdr->parsed){
if(parse_accept_hdr(sipmsg)<0){
return 5;
}
}
if((len=encode_accept(hdr->name.s,hdr->len,(unsigned int*)hdr->parsed,(char*)(payload+5)))<0){
myerror="encoding via header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_CONTENTTYPE_T:
if(!hdr->parsed){
if(parse_content_type_hdr(sipmsg)<0){
myerror="encoding content-type header\n";
goto error;
}
}
if((len=encode_content_type(hdr->name.s,hdr->len,(unsigned int)get_content_type(sipmsg),(char*)(payload+5)))<0){
myerror="encoding via header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_CSEQ_T:
if(!hdr->parsed){
if((cseqbody=pkg_malloc(sizeof(struct cseq_body)))==0){
myerror="out of memory\n";
goto error;
}
memset(cseqbody,0,sizeof(struct cseq_body));
if(parse_cseq(hdr->name.s,hdr->body.s+hdr->body.len+1,cseqbody)==0){
myerror="encoding cseq header\n";
goto error;
}
hdr->parsed=cseqbody;
}
if((len=encode_cseq(hdr->name.s,hdr->len,(struct cseq_body*)hdr->parsed,payload+5))<0){
myerror="encoding via header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_EXPIRES_T:
if(!hdr->parsed){
if(parse_expires(hdr)<0){
myerror="encoding expires header\n";
goto error;
}
}
if((len=encode_expires(hdr->name.s,hdr->len,(exp_body_t *)hdr->parsed,payload+5))<0){
myerror="encoding expires header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_ALLOW_T:
if(!hdr->parsed){
if((methods=pkg_malloc(sizeof(unsigned int)))==0){
myerror="out of memory\n";
goto error;
}
*methods=0;
if(parse_methods(&hdr->body,methods)!=0){
myerror="encoding allow header\n";
pkg_free(methods);
return 5;
/*goto error;*/
}
hdr->parsed=methods;
}
if((len=encode_allow(hdr->name.s,hdr->len,(unsigned int*)hdr->parsed,(char*)(payload+5)))<0){
myerror="encoding allow header\n";
goto error;
}else{
return 5+len;
}
break;
case HDR_AUTHORIZATION_T:
case HDR_PROXYAUTH_T:
if(!hdr->parsed){
if(parse_credentials(hdr)<0){
myerror="encoding a digest header\n";
goto error;
}
}
if((len=encode_digest(hdr->name.s,hdr->len,(dig_cred_t*)(&(((auth_body_t*)hdr->parsed)->digest)),payload+5))<0){
myerror="encoding allow header\n";
goto error;
}else{
return 5+len;
}
break;
default:
return 5;
}
return 1;
error:
if(tobody)
pkg_free(tobody);
if(cseqbody)
pkg_free(cseqbody);
if(viabody)
free_via_list(viabody);
if(methods)
pkg_free(methods);
LM_ERR("%s",myerror);
return -1;
}
/** Frees a hdr_field structure.
* WARNING: it frees only parsed (and not name.s, body.s)
*/
void clean_hdr_field(struct hdr_field* const hf)
{
void** h_parsed;
if (hf->parsed){
h_parsed=&hf->parsed; /* strict aliasing warnings workarround */
switch(hf->type){
/* headers with pkg alloc for parsed structure (alphabetic order) */
case HDR_ACCEPT_T:
pkg_free(hf->parsed);
break;
case HDR_ALLOW_T:
free_allow_header(hf);
break;
case HDR_AUTHORIZATION_T:
free_credentials((auth_body_t**)h_parsed);
break;
case HDR_CONTACT_T:
free_contact((contact_body_t**)h_parsed);
break;
case HDR_CONTENTDISPOSITION_T:
free_disposition( ((struct disposition**)h_parsed));
break;
case HDR_CSEQ_T:
free_cseq(hf->parsed);
break;
case HDR_DATE_T:
free_date(hf->parsed);
break;
case HDR_DIVERSION_T:
free_to(hf->parsed);
break;
case HDR_EVENT_T:
free_event((event_t**)h_parsed);
break;
case HDR_EXPIRES_T:
free_expires((exp_body_t**)h_parsed);
break;
case HDR_FROM_T:
free_to(hf->parsed);
break;
case HDR_IDENTITY_INFO_T:
free_identityinfo(hf->parsed);
break;
case HDR_IDENTITY_T:
free_identity(hf->parsed);
break;
case HDR_PAI_T:
free_pai_ppi_body(hf->parsed);
break;
case HDR_PPI_T:
free_pai_ppi_body(hf->parsed);
break;
case HDR_PROXYAUTH_T:
free_credentials((auth_body_t**)h_parsed);
break;
case HDR_RECORDROUTE_T:
free_rr((rr_t**)h_parsed);
break;
case HDR_REFER_TO_T:
free_to(hf->parsed);
break;
case HDR_ROUTE_T:
free_rr((rr_t**)h_parsed);
break;
case HDR_RPID_T:
free_to(hf->parsed);
break;
case HDR_SESSIONEXPIRES_T:
hdr_free_parsed(h_parsed);
break;
case HDR_SIPIFMATCH_T:
free_sipifmatch((str **)h_parsed);
break;
case HDR_SUBSCRIPTION_STATE_T:
free_subscription_state((subscription_state_t**)h_parsed);
break;
case HDR_SUPPORTED_T:
hdr_free_parsed(h_parsed);
break;
case HDR_TO_T:
free_to(hf->parsed);
break;
case HDR_VIA_T:
free_via_list(hf->parsed);
break;
/* headers with no alloc for parsed structure */
case HDR_CALLID_T:
case HDR_MAXFORWARDS_T:
case HDR_CONTENTTYPE_T:
case HDR_CONTENTLENGTH_T:
case HDR_RETRY_AFTER_T:
case HDR_REQUIRE_T:
case HDR_PROXYREQUIRE_T:
case HDR_UNSUPPORTED_T:
case HDR_ACCEPTLANGUAGE_T:
case HDR_ORGANIZATION_T:
case HDR_PRIORITY_T:
case HDR_SUBJECT_T:
case HDR_USERAGENT_T:
case HDR_SERVER_T:
case HDR_MIN_SE_T:
case HDR_ACCEPTCONTACT_T:
case HDR_ALLOWEVENTS_T:
case HDR_CONTENTENCODING_T:
case HDR_REFERREDBY_T:
case HDR_REJECTCONTACT_T:
case HDR_REQUESTDISPOSITION_T:
case HDR_WWW_AUTHENTICATE_T:
case HDR_PROXY_AUTHENTICATE_T:
case HDR_PATH_T:
case HDR_PRIVACY_T:
case HDR_REASON_T:
break;
default:
LOG(L_CRIT, "BUG: clean_hdr_field: unknown header type %d\n",
hf->type);
break;
}
}
}
/*
* Frees a hdr_field structure,
* WARNING: it frees only parsed (and not name.s, body.s)
*/
void clean_hdr_field(struct hdr_field* hf)
{
if (hf->parsed){
switch(hf->type){
case HDR_VIA_T:
free_via_list(hf->parsed);
hf->parsed = NULL;
break;
case HDR_TO_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_FROM_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_CSEQ_T:
free_cseq(hf->parsed);
hf->parsed = NULL;
break;
case HDR_CALLID_T:
break;
case HDR_CONTACT_T:
free_contact((contact_body_t**)(void*)(&(hf->parsed)));
break;
case HDR_MAXFORWARDS_T:
break;
case HDR_ROUTE_T:
free_rr((rr_t**)(void*)(&hf->parsed));
break;
case HDR_RECORDROUTE_T:
free_rr((rr_t**)(void*)(&hf->parsed));
break;
case HDR_PATH_T:
free_rr((rr_t**)(void*)(&hf->parsed));
break;
case HDR_CONTENTTYPE_T:
free_contenttype((content_t**)(void*)(&hf->parsed));
break;
case HDR_CONTENTLENGTH_T:
break;
case HDR_AUTHORIZATION_T:
free_credentials((auth_body_t**)(void*)(&(hf->parsed)));
break;
case HDR_EXPIRES_T:
free_expires((exp_body_t**)(void*)(&(hf->parsed)));
break;
case HDR_PROXYAUTH_T:
free_credentials((auth_body_t**)(void*)(&(hf->parsed)));
break;
case HDR_SUPPORTED_T:
free_supported((struct supported_body**)(void*)(&(hf->parsed)));
break;
case HDR_PROXYREQUIRE_T:
break;
case HDR_UNSUPPORTED_T:
break;
case HDR_ALLOW_T:
free_allow((struct allow_body**)(void*)(&(hf->parsed)));
break;
case HDR_EVENT_T:
free_event((event_t**)(void*)(&(hf->parsed)));
break;
case HDR_ACCEPT_T:
pkg_free(hf->parsed);
hf->parsed = NULL;
break;
case HDR_ACCEPTLANGUAGE_T:
break;
case HDR_ORGANIZATION_T:
break;
case HDR_PRIORITY_T:
break;
case HDR_SUBJECT_T:
break;
case HDR_USERAGENT_T:
break;
case HDR_ACCEPTDISPOSITION_T:
break;
case HDR_CONTENTDISPOSITION_T:
free_disposition( ((struct disposition**)(void*)(&hf->parsed)) );
break;
case HDR_DIVERSION_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_RPID_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_REFER_TO_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_SESSION_EXPIRES_T:
free_session_expires((struct session_expires*)hf->parsed );
hf->parsed = NULL;
break;
case HDR_MIN_SE_T:
break;
case HDR_MIN_EXPIRES_T:
break;
case HDR_PPI_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_PAI_T:
free_to(hf->parsed);
hf->parsed = NULL;
break;
case HDR_PRIVACY_T:
break;
case HDR_RETRY_AFTER_T:
break;
case HDR_CALL_INFO_T:
free_call_info(hf->parsed);
hf->parsed = NULL;
break;
case HDR_WWW_AUTHENTICATE_T:
case HDR_PROXY_AUTHENTICATE_T:
free_authenticate((struct authenticate_body *)hf->parsed);
hf->parsed = NULL;
break;
default:
LM_CRIT("unknown header type %d\n", hf->type);
break;
}
}
}
/*
* Frees a hdr_field structure,
* WARNING: it frees only parsed (and not name.s, body.s)
*/
void clean_hdr_field(struct hdr_field* hf)
{
if (hf->parsed){
switch(hf->type){
case HDR_VIA:
free_via_list(hf->parsed);
break;
case HDR_TO:
free_to(hf->parsed);
break;
case HDR_FROM:
free_to(hf->parsed);
break;
case HDR_CSEQ:
free_cseq(hf->parsed);
break;
case HDR_CALLID:
break;
case HDR_CONTACT:
free_contact((contact_body_t**)(&(hf->parsed)));
break;
case HDR_MAXFORWARDS:
break;
case HDR_ROUTE:
free_rr((rr_t**)(&hf->parsed));
break;
case HDR_RECORDROUTE:
free_rr((rr_t**)(&hf->parsed));
break;
case HDR_CONTENTTYPE:
break;
case HDR_CONTENTLENGTH:
break;
case HDR_AUTHORIZATION:
free_credentials((auth_body_t**)(&(hf->parsed)));
break;
case HDR_EXPIRES:
free_expires((exp_body_t**)(&(hf->parsed)));
break;
case HDR_PROXYAUTH:
free_credentials((auth_body_t**)(&(hf->parsed)));
break;
case HDR_SUPPORTED:
break;
case HDR_PROXYREQUIRE:
break;
case HDR_UNSUPPORTED:
break;
case HDR_ALLOW:
break;
case HDR_EVENT:
free_event((event_t**)(&(hf->parsed)));
break;
case HDR_ACCEPT:
pkg_free(hf->parsed);
break;
case HDR_ACCEPTLANGUAGE:
break;
case HDR_ORGANIZATION:
break;
case HDR_PRIORITY:
break;
case HDR_SUBJECT:
break;
case HDR_USERAGENT:
break;
case HDR_ACCEPTDISPOSITION:
break;
case HDR_CONTENTDISPOSITION:
free_disposition( ((struct disposition**)(&hf->parsed)) );
break;
default:
LOG(L_CRIT, "BUG: clean_hdr_field: unknown header type %d\n",
hf->type);
break;
}
}
}
/* returns pointer to next header line, and fill hdr_f ;
* if at end of header returns pointer to the last crlf (always buf)*/
char* get_hdr_field(char* buf, char* end, struct hdr_field* hdr)
{
char* tmp;
char *match;
struct via_body *vb;
struct cseq_body* cseq_b;
struct to_body* to_b;
int integer;
if ((*buf)=='\n' || (*buf)=='\r'){
/* double crlf or lflf or crcr */
DBG("found end of header\n");
hdr->type=HDR_EOH;
return buf;
}
tmp=parse_hname(buf, end, hdr);
if (hdr->type==HDR_ERROR){
LOG(L_ERR, "ERROR: get_hdr_field: bad header\n");
goto error;
}
/* eliminate leading whitespace */
tmp=eat_lws_end(tmp, end);
if (tmp>=end) {
LOG(L_ERR, "ERROR: get_hdr_field: HF empty\n");
goto error;
}
/* if header-field well-known, parse it, find its end otherwise ;
* after leaving the hdr->type switch, tmp should be set to the
* next header field
*/
switch(hdr->type){
case HDR_VIA:
/* keep number of vias parsed -- we want to report it in
replies for diagnostic purposes */
via_cnt++;
vb=pkg_malloc(sizeof(struct via_body));
if (vb==0){
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(vb,0,sizeof(struct via_body));
hdr->body.s=tmp;
tmp=parse_via(tmp, end, vb);
if (vb->error==PARSE_ERROR){
LOG(L_ERR, "ERROR: get_hdr_field: bad via\n");
free_via_list(vb);
goto error;
}
hdr->parsed=vb;
vb->hdr.s=hdr->name.s;
vb->hdr.len=hdr->name.len;
hdr->body.len=tmp-hdr->body.s;
break;
case HDR_CSEQ:
cseq_b=pkg_malloc(sizeof(struct cseq_body));
if (cseq_b==0){
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(cseq_b, 0, sizeof(struct cseq_body));
hdr->body.s=tmp;
tmp=parse_cseq(tmp, end, cseq_b);
if (cseq_b->error==PARSE_ERROR){
LOG(L_ERR, "ERROR: get_hdr_field: bad cseq\n");
pkg_free(cseq_b);
goto error;
}
hdr->parsed=cseq_b;
hdr->body.len=tmp-hdr->body.s;
DBG("get_hdr_field: cseq <%.*s>: <%.*s> <%.*s>\n",
hdr->name.len, ZSW(hdr->name.s),
cseq_b->number.len, ZSW(cseq_b->number.s),
cseq_b->method.len, cseq_b->method.s);
break;
case HDR_TO:
to_b=pkg_malloc(sizeof(struct to_body));
if (to_b==0){
LOG(L_ERR, "get_hdr_field: out of memory\n");
goto error;
}
memset(to_b, 0, sizeof(struct to_body));
hdr->body.s=tmp;
tmp=parse_to(tmp, end,to_b);
if (to_b->error==PARSE_ERROR){
LOG(L_ERR, "ERROR: get_hdr_field: bad to header\n");
pkg_free(to_b);
goto error;
}
hdr->parsed=to_b;
hdr->body.len=tmp-hdr->body.s;
DBG("DEBUG: get_hdr_field: <%.*s> [%d]; uri=[%.*s] \n",
hdr->name.len, ZSW(hdr->name.s),
hdr->body.len, to_b->uri.len,ZSW(to_b->uri.s));
DBG("DEBUG: to body [%.*s]\n",to_b->body.len,
ZSW(to_b->body.s));
break;
case HDR_CONTENTLENGTH:
hdr->body.s=tmp;
tmp=parse_content_length(tmp,end, &integer);
if (tmp==0){
LOG(L_ERR, "ERROR:get_hdr_field: bad content_length header\n");
goto error;
}
hdr->parsed=(void*)(long)integer;
hdr->body.len=tmp-hdr->body.s;
DBG("DEBUG: get_hdr_body : content_length=%d\n",
(int)(long)hdr->parsed);
break;
case HDR_SUPPORTED:
case HDR_CONTENTTYPE:
case HDR_FROM:
case HDR_CALLID:
case HDR_CONTACT:
case HDR_ROUTE:
case HDR_RECORDROUTE:
case HDR_MAXFORWARDS:
case HDR_AUTHORIZATION:
case HDR_EXPIRES:
case HDR_PROXYAUTH:
case HDR_PROXYREQUIRE:
case HDR_UNSUPPORTED:
case HDR_ALLOW:
case HDR_EVENT:
case HDR_ACCEPT:
case HDR_ACCEPTLANGUAGE:
case HDR_ORGANIZATION:
case HDR_PRIORITY:
case HDR_SUBJECT:
case HDR_USERAGENT:
case HDR_CONTENTDISPOSITION:
case HDR_ACCEPTDISPOSITION:
case HDR_DIVERSION:
case HDR_RPID:
case HDR_OTHER:
/* just skip over it */
hdr->body.s=tmp;
/* find end of header */
/* find lf */
do{
match=q_memchr(tmp, '\n', end-tmp);
if (match){
match++;
}else {
LOG(L_ERR,
"ERROR: get_hdr_field: bad body for <%s>(%d)\n",
hdr->name.s, hdr->type);
/* abort(); */
tmp=end;
goto error;
}
tmp=match;
}while( match<end &&( (*match==' ')||(*match=='\t') ) );
tmp=match;
hdr->body.len=match-hdr->body.s;
break;
default:
LOG(L_CRIT, "BUG: get_hdr_field: unknown header type %d\n",
hdr->type);
goto error;
}
/* jku: if \r covered by current length, shrink it */
trim_r( hdr->body );
hdr->len=tmp-hdr->name.s;
return tmp;
error:
DBG("get_hdr_field: error exit\n");
hdr->type=HDR_ERROR;
hdr->len=tmp-hdr->name.s;
return tmp;
}
