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webserver.h
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webserver.h
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#ifndef __webserver_h__
#define __webserver_h__
#include "memdebughack.h"
#include "peer.h"
#include "thread.h"
#include <sys/errno.h>
#include "stun_callback.h"
#include "iplookup_hack.h"
#include "macro_expand.h"
/* include websockets */
#define sha1 sha1_
#define assert assert_
#include "websocket.h"
#define sha1_ sha1
#define assert_ assert
#define CHATLOG_SIZE 512000 // js takes up a lot of this space..
#define TMPTRACE \
printf("TRACE:%d",__FILE__,__LINE__)
extern int listen_port_base;
extern peer_session_t peers[MAX_PEERS];
extern int stun_binding_response_count;
extern char* dtls_fingerprint;
const static unsigned long SPIN_WAIT_USEC = 1000;
static char g_chatlog[CHATLOG_SIZE];
static time_t g_chatlog_ts;
static char* g_sdp;
static pthread_mutex_t webmtx;
char listen_port_str[64];
extern int sdp_prefix_set(const char*);
struct webserver_state {
char inip[64];
int running;
unsigned int peer_idx_next;
int sock;
};
extern struct webserver_state webserver;
typedef struct {
int sock;
pthread_t ws_thread;
int ws_peeridx;
int state;
char websocket_accept_response[512];
char* pbody;
char roomname[256];
char paddinghack[1024];
} webserver_worker_args;
static char *tag_icecandidate = "%$RTCICECANDIDATE$%";
static char *tag_room_ws = "%$ROOMNAME$%";
static char *tag_sdp_offer1 = "%$SDP_OFFER$%";
static char* tag_joinroom_ws = "POST /join/";
static char* tag_msgroom_ws = "POST /message/domain17/";
static char* webserver_staticc;
// static char ufrag_answer_tmp[1024];
static char ufrag_offeranswer_tmp[256];
static int cb_done = 0;
static char webserver_get_localaddr_buf[64];
const char* webserver_get_localaddr() {
sprintf(webserver_get_localaddr_buf, "%s %u", iplookup_addr, listen_port_base);
return webserver_get_localaddr_buf;
}
const char*
chatlog_read()
{
return (const char*) g_chatlog;
}
void
chatlog_ts_update()
{
g_chatlog_ts = time(NULL);
}
void
chatlog_prune(char* str)
{
char *dst = str;
const char *src = str;
while(*src != '\0')
{
if(*src == '\n')
{
if(src-dst > 1)
{
while(dst < src)
{
*dst = *src;
dst++;
}
*dst = '\n';
}
}
src++;
}
}
void
chatlog_append(const char* pchatmsg)
{
size_t appendlen = strlen(pchatmsg);
if(appendlen <= 1) {
printf("chatlogappend ignoring empty line\n");
chatlog_ts_update();
return;
}
if(strlen(pchatmsg) >= CHATLOG_SIZE-1) appendlen = (CHATLOG_SIZE-1);
// rotate buffer
char *pto = g_chatlog, *pfrom = (char*) g_chatlog + ((CHATLOG_SIZE-1) >= strlen(g_chatlog)+appendlen ? 0 : appendlen);
while(*pfrom)
{
if(*pfrom != '\'') *pto = *pfrom;
pfrom++;
pto++;
}
pfrom = pchatmsg;
while(*pfrom)
{
*pto = *pfrom;
pto++;
pfrom++;
}
*pto = '\0';
file_append(g_chatlog, strlen(g_chatlog), "chatlog.txt");
chatlog_ts_update();
}
void
chatlog_reload()
{
int file_buf_len = 0;
memset(g_chatlog, 0, CHATLOG_SIZE);
char* file_buf = file_read("chatlog.txt", &file_buf_len);
if(file_buf)
{
memcpy(g_chatlog, file_buf, file_buf_len);
free(file_buf);
}
chatlog_prune(file_buf);
}
static void cb_disconnect_first(peer_session_t* p) {
extern void cb_disconnect(peer_session_t*);
cb_disconnect(p);
assert(p->buffer_count == PEER_RECV_BUFFER_COUNT);
}
void cb_begin(peer_session_t* p) {
printf("peer[%d] we alive now chickenhead!\n", p->id);
// cxn_start is called by main epoll thread
extern void cb_disconnect(peer_session_t*);
p->cb_restart = cb_disconnect_first;
p->time_pkt_last = get_time_ms();
p->alive = 1;
}
void
bootstrap_peer_async(peer_session_t* p)
{
usleep(1000000);
p->alive = 1;
printf("bootstrap_peer:\nsdp:\n%s\n", p->sdp.answer);
int count = 10;
while(count > 0)
{
while(p->alive && !p->thread_inited)
{
usleep(10000);
printf("bootstrap_peer_async: awaiting !peers[%d].thread_inited\n", p->id);
}
printf("bootstrap_peer_async: peer[%d] alive=%d\n", p->id, p->alive);
count--;
}
//printf("bootstrap_peer_async: aliving..");
//p->alive = 1;
printf(".done\n");
}
void setupSTUN(void* voidp) {
peer_session_t *p = voidp;
char** sdp = &g_sdp;
// this is called with peer lock taken and alive=true, careful
printf("setupSTUN: ICE peer matched....\n");
// init stun-ice attributes
strcpy(p->sdp.answer, *sdp);
// HACK: leaking a buffer here for sdp so it can be shared between threads
//printf("leaking sdp: %02x\n", *sdp);
//free(*sdp);
//*sdp = NULL;
// mark -- signal/wait for peer to be initialized
p->time_pkt_last = get_time_ms();
}
peer_session_t* cb_tgtpeer;
void*
webserver_worker(void* p)
{
int r;
char *page_buf_welcome = "<html><p>Welcome</p></html>";
char *page_buf_400 = "<html><button onclick='document.location=\"/index.html\"'>Join conference</button></html>";
char *page_buf_sdp_uploaded = "<html><button><body onload='window.location=\"content/uploadDone.html\";'>redirecting...</body></html>";
char *page_buf_redirect_chat = "<html><body onload='window.location=\"content/peersPopup.html\";'>redirecting...</body></html>";
char *page_buf_redirect_back = "<html><body onload='location=\"/content/chat.html\";'>redirecting...</body></html>";
char *page_buf_redirect_subscribe = "<html><body onload='location=\"/content/iframe_channel.html\";'>redirecting...</body></html>";
char *page_buf_slotbusy = "<html><body onload='window.location=\"content/uploadDone.html\";'><p>peer connection resources busy - please try again</p></body></html>";
char *ok_hdr_ok = "HTTP/1.0 200 OK\r\n", *ok_hdr = ok_hdr_ok;
char *accepted_hdr = "HTTP/1.0 201 Created\r\n";
char *fail_hdr = "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\n";
char *content_type_html = "Content-Type: text/html\r\n\r\n";
char *content_type_sdp = "Content-Type: application/sdp\r\n\r\n";
char *content_type = content_type_html;
char* content_length_hdr = "Content-Length: ";
char *tag_hostname = "%$HOSTNAME$%";
char *tag_peerdynamicjs = "%$PEERDYNAMICJS$%";
char *tag_urlargsname = "%$URLARGUMENTSNAME$%";
char *tag_urlargsroom = "%$URLARGUMENTSROOM$%";
char *tag_webport = "%$WEBPORT$%";
char *tag_rtpport = "%$RTPPORT$%";
char *tag_peerlisthtml = "%$PEERLISTHTML$%";
char *tag_peerlisthtml_options = "%$PEERLISTHTMLOPTIONS$%";
char *tag_peerlist_jsarray = "%$PEERLISTJSARRAY$%";
char *tag_stunconfig_js = "%$STUNCONFIGJS$%";
char *tag_chatlogvalue = "%$CHATLOGTEXTAREAVALUE$%";
char *tag_chatlogjs = "%$CHATLOGJSARRAY$%";
char *tag_chatlogtsvalue = "%$CHATLOGTSVALUE$%";
char *tag_watchuser = "watch?user=";
char *tag_login = "login.html";
char *tag_login_apprtc = "/login/";
char *tag_logout = "logout.html";
char *tag_sdp = "%$SDP_OFFER$%";
char *tag_authcookie = "%$AUTHCOOKIE$%";
char *tag_dtlsfingerprint = "%$DTLSFINGERPRINT$%";
char *tag_lobbyimage = "%$LOBBYIMAGEURL$%";
const size_t buf_size = 4096;
int use_user_fragment_prefix = 1;
webserver_worker_args* args = (webserver_worker_args*) p;
unsigned int content_len = 0;
char cookie[256], cookieset[256];
char ws_header_buf[256];
peer_session_t* peer_found_via_cookie = NULL;
int peer_broadcast_from_cookie = PEER_IDX_INVALID;
char stackPaddingHack[2048];
char* recvbuf = malloc(buf_size*2);
pthread_t thr_boot;
pthread_attr_t thread_attrs;
memset(cookie, 0, sizeof(cookie));
sprintf(cookieset, "%02x%02x%02x%02x", rand() % 0xff, rand() % 0xff, rand() % 0xff, rand() % 0xff);
thread_init();
sprintf(listen_port_str, "%d", peers[webserver.peer_idx_next % MAX_PEERS].port);
do
{
int sock;
struct sockaddr_in sa;
socklen_t sa_len;
int flags = 0;
memset(&sa, 0, sizeof(sa));
sa_len = sizeof(sa);
sock = args->sock;
if(sock >= 0)
{
//printf("%s:%d connection thread (%s:%d)\n", __func__, __LINE__, inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
memset(recvbuf, 0, buf_size);
char *roff = recvbuf;
unsigned int recv_left = buf_size-1;
int timed_out = 0;
int do_shutdown = 1;
int timeout_ms = 10000;
while(1)
{
/* new request */
/* TODO: always indicate connection-close by shutting-down immediately */
if(waitsocket(sock, timeout_ms / 1000, 0) == 0)
{
printf("%s:%d timed out\n", __func__, __LINE__);
do_shutdown = 1;
timed_out = 1;
}
r = recv(sock, roff, recv_left, flags);
if(r <= 0) break;
const char *cookietoken;
char* pcookie;
cookietoken = "authCookieJS12242016=";
pcookie = strstr(recvbuf, cookietoken);
memset(cookie, 0, sizeof(cookie));
if(pcookie)
{
pcookie += strlen(cookietoken);
str_read(pcookie, cookie, ";\r\n\t", sizeof(cookie));
strcpy(cookieset, cookie);
}
char* pcontent_len = strstr(recvbuf, content_length_hdr);
if(pcontent_len && content_len == 0)
{
pcontent_len += strlen(content_length_hdr);
sscanf(pcontent_len, "%u", &content_len);
}
char* phdr_end = strstr(recvbuf, "\r\n\r\n");
if(phdr_end && content_len == 0) break;
roff += r;
recv_left -= r;
/* if >= content-length received, break */
unsigned int body_len = (roff-recvbuf) - (phdr_end-recvbuf) - 4;
if(content_len > 0 && body_len >= content_len) break;
}
if(strlen(recvbuf) > 0)
{
char path[buf_size];
char url_args[1024];
char *purl = NULL;
char *pbody = NULL;
char *phttpheaders = NULL;
char *pend = NULL;
char *response = NULL;
int response_binary = 0;
unsigned int file_buf_len = 0;
char *file_buf = NULL;
int cmd_post = 0;
char cookie_hdr[256];
int sidx;
int i;
char tmp[256];
memset(url_args, 0, sizeof(url_args));
cookie_hdr[0] = '\0';
purl = recvbuf;
memdebug_sanity(recvbuf);
if(strncmp(recvbuf, "GET ", 4) == 0) {
purl = recvbuf+4;
}
else if(strncmp(recvbuf, "POST ", 5) == 0) {
purl = recvbuf+5;
cmd_post = 1;
}
else {
continue;
}
response = strdup(page_buf_400);
memdebug_sanity(response);
char *e = purl;
char *pargs = NULL;
while (e-purl < (sizeof(path)-1) && *e != '\0' && *e != '\r' && *e && *e != '\n' && *e != ' ' && *e != '?') e++;
if(*e == '?') {
char* ptr = url_args;
pargs = e+1;
while((*pargs >= 'a' && *pargs <= 'z') || (*pargs >= '0' && *pargs <= '9') || (*pargs == '&' || *pargs == '%' || *pargs == '='))
{
*ptr = *pargs;
pargs++;
ptr++;
}
*ptr = '\0';
}
*e = '\0';
memdebug_sanity(recvbuf);
pbody = e+1;
while(*pbody == '\r' || *pbody == '\n') pbody++;
phttpheaders = pbody;
if(*pbody != '\0')
{
pbody = strstr(pbody, "\r\n\r\n");
if(pbody) pbody += 4;
else pbody = e+1;
}
pend = pbody;
while(*pend) pend++;
memdebug_sanity(recvbuf);
//printf("%s:%d webserver received:\n----------------\n"
// "%s\n---------------%s\n"
// "---------------\n", __func__, __LINE__,
// recvbuf, phttpheaders);
peer_found_via_cookie = peer_find_by_cookie(cookie);
//printf("peer_found_via_cookie=%s\n", peer_found_via_cookie!=0? "yes" : "no");
if(!cmd_post)
{
if(strcmp(purl, "/") == 0) strcpy(path, "index.html");
else sprintf(path, "./%s", purl);
file_buf = file_read(path, &file_buf_len);
//printf("%s:%d webserver GET for file (%s):\n\t%s\n", __func__, __LINE__, file_buf? "": "failed", path);
if(!file_buf)
{
if(file_buf)
{
free(file_buf);
file_buf = NULL;
}
send(sock, ok_hdr, strlen(ok_hdr), flags);
send(sock, content_type_html, strlen(content_type_html), flags);
send(sock, page_buf_400, strlen(page_buf_400), flags);
timed_out = 1;
}
else
{
free(response);
response = file_buf;
file_buf = NULL;
if(strstr(path, ".js")) content_type = "Content-Type: text/javascript\r\n\r\n";
else if(strstr(path, ".html")) content_type = content_type_html;
else if(strstr(path, ".css")) content_type = "Content-Type: text/css\r\n\r\n";
else if(strstr(path, ".jpg")) { response_binary = 1; content_type = "Content-Type: image/jpeg\r\n\r\n"; }
else if(strstr(path, ".gif")) { response_binary = 1; content_type = "Content-Type: image/gif\r\n\r\n"; }
else if(strstr(path, ".png")) { response_binary = 1; content_type = "Content-Type: image/png\r\n\r\n"; }
else if(strstr(path, tag_watchuser)) content_type = content_type_html;
else content_type = content_type = "Content-Type: application/octet-stream\r\n\r\n";
}
if(strstr(purl, tag_login) && strlen(url_args) > 0)
{
size_t retries = MAX_PEERS;
printf("cookie=%s\n", cookie);
sidx = webserver.peer_idx_next % MAX_PEERS;
webserver.peer_idx_next += 1;
PEER_LOCK(sidx);
if(peers[sidx].alive)
{
// full
PEER_UNLOCK(sidx);
printf("webserver: peers full @ login\n");
content_type = content_type_html;
response = strdup(page_buf_redirect_back);
goto response_override;
}
printf("peer[%d] logging in\n", sidx);
peer_init(&peers[sidx], sidx);
peers[sidx].time_pkt_last = get_time_ms();
peer_cookie_init(&peers[sidx], cookie);
strcpy((char*) &peers[sidx].name, str_read_unsafe(url_args, "name=", 0));
/*
chatlog_append("login:"); chatlog_append(peers[sidx].name); chatlog_append("\n");
*/
strcat(peers[sidx].http.dynamic_js, "myUsername = '");
strcat(peers[sidx].http.dynamic_js, peers[sidx].name);
strcat(peers[sidx].http.dynamic_js, "';\n");
PEER_UNLOCK(sidx);
}
if(strstr(purl, tag_logout))
{
if(peer_found_via_cookie)
{
peer_session_t* peer_logout = peer_found_via_cookie;
/*
chatlog_append("logged out:"); chatlog_append(peer_found_via_cookie->name); chatlog_append("\n");
*/
PEER_LOCK(peer_logout->id);
void web_cb_logout(peer_session_t* p) {
printf("cb_logout @ %02x\n", p);
p->alive = 0;
peer_cookie_init(p, "");
}
peer_logout->cb_restart = web_cb_logout;
peer_logout->init_needed = 1;
PEER_UNLOCK(peer_logout->id);
peer_found_via_cookie = NULL;
}
}
/* macros */
if(peer_found_via_cookie)
{
response = macro_str_expand(response, tag_peerdynamicjs, peer_found_via_cookie->http.dynamic_js);
}
else
{
response = macro_str_expand(response, tag_peerdynamicjs, PEER_DYNAMIC_JS_EMPTY);
}
response = macro_str_expand(response, tag_hostname, iplookup_addr);
response = macro_str_expand(response, tag_urlargsname, str_read_unsafe_delim(url_args, "name=", 0, "&"));
response = macro_str_expand(response, tag_urlargsroom, str_read_unsafe_delim(url_args, "room=", 0, "&"));
response = macro_str_expand(response, tag_webport, get_config("webserver_port="));
response = macro_str_expand(response, tag_rtpport, listen_port_str);
{
const char *onClickMethod = "onPeerClick";
char peer_list_html[buf_size];
memset(peer_list_html, 0, sizeof(peer_list_html));
char line[buf_size];
int i;
int num_peers = 0;
for(i = 0; i < MAX_PEERS; i++)
{
if(peers[i].alive)
{
num_peers++;
char key_buf[1024];
hex_print(key_buf, peers[i].dtls.master_key_salt, 8);
sprintf(line, "<input type='checkbox' %s onClick='%s(\"%s\", this);'>[%d]:%s (address:%s:%d bytes:%u id:%d master_key:%s)</input><br>\n",
peers[i].recv_only? "disabled": "",
(char*)onClickMethod,
peers[i].name, i, peers[i].name,
inet_ntoa(peers[i].addr.sin_addr),
ntohs(peers[i].addr.sin_port),
peers[i].rtp_buffered_total,
peers[i].id,
key_buf);
strncat(peer_list_html, line, sizeof(peer_list_html)-strlen(peer_list_html)-1);
}
}
response = macro_str_expand(response, tag_peerlisthtml, peer_list_html);
}
if(strstr(response, tag_peerlisthtml_options))
{
char peer_list_html[buf_size];
char line[buf_size];
int peer_list_html_free = buf_size-1;
int num_peers = 0;
memset(peer_list_html, 0, sizeof(peer_list_html));
memset(line, 0, sizeof(line));
for(i = 0; i < MAX_PEERS; i++)
{
if(peers[i].alive)
{
num_peers++;
char key_buf[1024];
hex_print(key_buf, peers[i].dtls.master_key_salt, 8);
sprintf(line, "<option value=\"%s\">%s (%s:%d)</option>\n", peers[i].name, peers[i].name, inet_ntoa(peers[i].addr.sin_addr), ntohs(peers[i].addr.sin_port));
if(strlen(line) >= sizeof(peer_list_html)-strlen(peer_list_html)) break;
strcat(peer_list_html, line);
peer_list_html_free -= strlen(line);
}
}
response = macro_str_expand(response, tag_peerlisthtml_options, peer_list_html);
}
if(strstr(response, tag_peerlist_jsarray))
{
char peer_list_html[buf_size];
int peer_list_html_free = buf_size-16;
char line[buf_size];
int num_peers = 0;
int first_entry = 1;
sprintf(peer_list_html, "var peerList = [");
for(i = 0; i < MAX_PEERS; i++)
{
if(peers[i].alive && peers[i].srtp_inited)
{
num_peers++;
char key_buf[1024];
char salt_buf[1024];
hex_print(key_buf, peers[i].dtls.master_key[0], SRTP_MASTER_KEY_KEY_LEN);
hex_print(salt_buf, peers[i].dtls.master_salt[0], SRTP_MASTER_KEY_SALT_LEN);
sprintf(line, "%s{'name': '%s', 'id': '%d', 'addr': '%s:%u', 'key': '%s', 'salt': '%s', 'recvonly': %s, 'room': '%s'}",
(first_entry? "": ","), peers[i].name, peers[i].id, inet_ntoa(peers[i].addr.sin_addr), ntohs(peers[i].addr.sin_port),
key_buf, salt_buf, (peers[i].recv_only? "true": "false"), peers[i].roomname);
if(peer_list_html_free < strlen(line)) break;
strcat(peer_list_html, line);
peer_list_html_free -= strlen(line);
first_entry = 0;
}
}
strcat(peer_list_html, "];\n");
response = macro_str_expand(response, tag_peerlist_jsarray, peer_list_html);
}
sprintf(tmp, "{ \"iceServers\": [{ \"url\": \"stun:%s:%s\" }] }", iplookup_addr, listen_port_str);
response = macro_str_expand(response, tag_stunconfig_js, /*tmp*/ "null");
sprintf(tmp, "candidate:1 1 UDP 1234 %s %s typ host generation 0 network-cost 50", iplookup_addr, listen_port_str);
response = macro_str_expand(response, tag_icecandidate, tmp);
response = macro_str_expand(response, tag_chatlogvalue, chatlog_read());
if(strstr(response, tag_sdp))
{
pthread_mutex_lock(&webmtx);
// MARK: -- sdp offer created here
char* offer = sdp_offer_create();
response = macro_str_expand(response, tag_sdp, offer);
pthread_mutex_unlock(&webmtx);
}
if(strstr(response, tag_chatlogjs))
{
// TODO: ignore empty lines in file here
size_t jslen = sizeof(g_chatlog)*4;
char* js = malloc(jslen);
if(!js) return NULL;
char* ptr = g_chatlog+1;
char* wptr = js;
// TODO: better separators in chatlog
const char* eoltag = "\n";
const char* septag = "',\n'";
strcpy(wptr, "'"); wptr++;
while(*ptr && wptr-js < (jslen-16))
{
if(strncmp(ptr, eoltag, strlen(eoltag)) == 0) {
strcpy(wptr, septag);
if(*ptr == eoltag[0]) ptr += strlen(eoltag);
else ptr++;
wptr += strlen(septag);
continue;
}
else if(*ptr == '\r') { ptr++; continue; }
else if(*ptr == '\'') { ptr++; continue; }
else if(*ptr == '\n' && *(ptr-1) == '\n') { ptr++; continue; }
else {
*wptr = *ptr;
}
ptr ++;
wptr ++;
}
*wptr = '\''; wptr++; *wptr = '\0';
response = macro_str_expand(response, tag_chatlogjs, js);
free(js);
}
sprintf(tmp, "%lu", g_chatlog_ts);
response = macro_str_expand(response, tag_chatlogtsvalue, tmp);
response = macro_str_expand(response, tag_authcookie, cookieset);
response = macro_str_expand(response, tag_dtlsfingerprint, dtls_fingerprint);
response = macro_str_expand(response, tag_lobbyimage, get_config("lobby_image="));
}
else
{
sprintf(path, "./%s", purl);//posturl
printf("%s:%d webserver POST for file (content_len:%d):\n\t%s\n", __func__, __LINE__, content_len, purl);
char** sdp = &g_sdp;
const char* (*ufrag_offerget)(void), (*ufrag_answerget)(void);
char* frag;
const char* ufrag_offerget_whep(void) {
// https://datatracker.ietf.org/doc/html/draft-murillo-whep-03
ok_hdr = accepted_hdr;
// stuff the uploaded offer as if we had prior created so it will be found during stun
strcpy(offer_frag, sdp_read(*sdp, kSDPICEUFRAG));
strcpy(offer_pwd, sdp_read(*sdp, kSDPICEPWD));
sdp_whep_answer_create(*sdp); // actually an answer reusing offer_table
char* g_answer = offer_building_whep;
char* myufrag = sdp_offer_table.t.iceufrag; // actually an answer reusing offer_table
// change peers init fn
peers[sidx].init_sesscb = peer_cb_init_sesh_whepice;
strcpy(peers[sidx].sdp.offer, *sdp); // save original offer from client
strcpy(peers[sidx].sdp.answer, g_answer); // save our answer
// DONT FORGET ICE PARAMS - stun_ice used temporarily before cxn-worker starts
//strcpy(peers[sidx].stun_ice.ufrag_answer, offer_frag); // TODO: ??? redundant? we are setting ufrag_offer/answer all over !!
//strcpy(peers[sidx].stun_ice.answer_pwd, sdp_read(peers[sidx].sdp.offer, kSDPICEPWD));
//strcpy(peers[sidx].stun_ice.offer_pwd, sdp_read(peers[sidx].sdp.answer, kSDPICEPWD));
// do not copy sdp offer from offer-table to peer yet - STUN happens and does that
// breakpoint!
return offer_frag; // return offer:answer (here whep is offer, we answer)
}
const char* ufrag_offerget_pbody(void) {
// here offer is previously already created by a GET for /sdp.js
ok_hdr = ok_hdr_ok;
strcpy(peers[sidx].sdp.answer, *sdp); // save original offer and use as answer
strcpy(peers[sidx].sdp.offer, sdp_offer_table.t.offer);
return sdp_offer_table.t.iceufrag; // return offer:answer (here we extended offer, *sdp is answer)
}
int sdp_upload_parse(void) {
// create temp file, decode, rename for worker thread to pick up/read and remove
sdp = &g_sdp;
*sdp = strdup(pbody);
memdebug_sanity(*sdp);
*sdp = sdp_decode(*sdp);
// anonymous+watching-only peers use new slot
if(peer_found_via_cookie && strstr(*sdp, "a=recvonly") != NULL)
{
//assert(0); // peer_found_via is dead code
peer_broadcast_from_cookie = peer_found_via_cookie->id;
peer_found_via_cookie = NULL;
}
sidx = webserver.peer_idx_next % MAX_PEERS;
webserver.peer_idx_next += 1;
PEER_LOCK(sidx);
if(peers[sidx].alive)
{
PEER_UNLOCK(sidx);
printf("webserver: peers full @ /upload (sdp) \n");
content_type = content_type_html;
response = strdup(page_buf_400);
return -1;
}
// dont copy things to the peer prior to this!!!!
peer_init(&peers[sidx], sidx);
peers[sidx].broadcastingID = peer_broadcast_from_cookie;
// CALLING CREATE-OFFER HERE or create-answer (whep) in ufrag_offerget()
char *offeranswermaybe = ufrag_offerget(); // see ufrag_offerget_whep
// still LOCKED!
return 0;
}
void cb_begin(peer_session_t* p) {
printf("peer[%d] we alive now chickenhead!\n", p->id);
// cxn_start is called by main epoll thread
// next time this peer restarts we are terminating (state)
extern void cb_disconnect(peer_session_t*);
p->time_pkt_last = get_time_ms();
p->alive = 1;
p->cb_restart = cb_disconnect;
cb_done = 1;
}
void stun_config_peer(void) {
// --
peer_session_t* p = &peers[sidx];
// TODO: to support non-bundled connections create a 2nd thread here with above stun/sdp fields cloned
// -- using init_needed here to signal
p->cb_restart = cb_begin;
// await??
p->init_needed = 1;
PEER_UNLOCK(p->id);
// TODO: signal connection_w23orker thread that it may continue running
// (right now it just sleeps)
do {
sleep_msec(10); // wait for thread to call cb_done
} while(!cb_done);
// copy more from offer-table to peer? (leaving work in connection_worker) to parse from sdp -- but this copy has to happen for stun matching prior
// NOOOOO dont change shit here while it is being asynchronously modified
// todo: send peer a stun bind request here
printf("stun_config_peer: userfrag: %s:%s\n", p->stun_ice.ufrag_offer, p->stun_ice.ufrag_answer);
}
// parse uri
printf("purl=%s\n", purl);
if(strcmp(purl, "/"FILENAME_SDP_WHEP_OFFER) == 0)
{
ufrag_offerget = ufrag_offerget_whep;
if(sdp_upload_parse() != 0) goto response_override;
// at this point the sdp-offer table should contain the offer SDP text OBS uploaded
free(response);
response = malloc(strlen(page_buf_sdp_uploaded) + 2048);
strcpy(response, peers[sidx].sdp.answer);
content_type = content_type_sdp;
// our SDP answer is stuffed into the sdp offer table...and will be copied to peerX when stun matches
stun_config_peer();
goto response_override;
}
// handle SDP-answer upload
else if(strcmp(purl, "/"FILENAME_SDP_ANSWER) == 0)
{
ufrag_offerget = ufrag_offerget_pbody;
if(sdp_upload_parse() != 0) goto response_override;
// find original SDP offer and decode SDP answer and init stun_ice attributes
/*
if(peer_found_via_cookie) // OR WHEP RESPONSE
{
assert(0); // TODO: REMOVE ME dead code to be removed
strcpy(ufrag_offeranswer_tmp, peer_found_via_cookie->stun_ice.ufrag_offer);
sidx = PEER_INDEX(peer_found_via_cookie);
if(sidx == webserver.peer_idx_next) webserver.peer_idx_next += 1;
PEER_LOCK(sidx);
}
*/
// setupSTUN moved from here - can't live on the stack now
printf("requesting peer[%d] restart\n", sidx);
free(response);
response = malloc(strlen(page_buf_sdp_uploaded) + 2048);
response[0] = '\0'; strcat(response, page_buf_sdp_uploaded);
content_type = content_type_html;
// TODO: there may be some benefit to having a separate monitor thread
// during setup "bootstrapping"
//pthread_attr_init(&thread_attrs);
//pthread_attr_setdetachstate(&thread_attrs, PTHREAD_CREATE_DETACHED);
//pthread_create(&thr_boot, &thread_attrs, bootstrap_peer_async, &peers[sidx]);
printf("webserver peer[%d] got SDP:\n%s\n", sidx, *sdp);
stun_config_peer();
goto response_override;
}
else if(strcmp(purl, "/chatmsg") == 0)
{
char *pchatmsg = pbody;
if(strncmp(pchatmsg, "msg=", 4)==0) pchatmsg += 4;
pchatmsg = sdp_decode(strdup(pchatmsg));
chatlog_append(pchatmsg);
free(response);
response = strdup(page_buf_redirect_back);
content_type = content_type_html;
goto response_override;
}
else if(strcmp(purl, "/subscribe") == 0)
{
peer_session_t* ps = peer_found_via_cookie;
unsigned int newChannel = 0;
char *p = pbody;
const char* subscribeKey = "subscriptionID=";
if(ps && strncmp(p, subscribeKey, strlen(subscribeKey)) == 0)
{
p += strlen(subscribeKey);
sscanf(p, "%u", &newChannel);
if(newChannel >= 0 && newChannel <= MAX_PEERS) {
ps->subscriptionID = peers[newChannel].id;
}
}
}
free(response);
response = strdup(page_buf_redirect_subscribe);
content_type = content_type_html;
}
response_override:
if(response && !timed_out)
{
char *hdr = ok_hdr;
char clen_hdr[256];
r = send(sock, hdr, strlen(hdr), flags);
r = send(sock, cookie_hdr, strlen(cookie_hdr), flags);
// all headers prior to content-length (which contains \r\n\r\n and terminates headers)
sprintf(clen_hdr, "Content-Length: %lu\r\nETag: \"wutang4eva\"\r\nLocation: %s\r\n%s",
response_binary? file_buf_len: strlen(response),
purl, // location
content_type
);
r = send(sock, clen_hdr, strlen(clen_hdr), flags);
r = send(sock, response, response_binary? file_buf_len: strlen(response), flags);
}
if(do_shutdown)
{
/* indicate to close cxn when done */
shutdown(sock, SHUT_WR);
}
if(response)
{
free(response);
response = NULL;
}
}