// open must be e3x_channel_receive or e3x_channel_send next yet
e3x_channel_t e3x_channel_new(lob_t open)
{
uint32_t id;
char *type;
e3x_channel_t c;
if(!open) return LOG("open packet required");
id = (uint32_t)lob_get_int(open,"c");
if(!id) return LOG("invalid channel id");
type = lob_get(open,"type");
if(!type) return LOG("missing channel type");
c = malloc(sizeof (struct e3x_channel_struct));
memset(c,0,sizeof (struct e3x_channel_struct));
c->state = OPENING;
c->id = id;
sprintf(c->c,"%u",id);
c->open = lob_copy(open);
c->type = lob_get(open,"type");
c->capacity = 1024*1024; // 1MB total default
// generate a unique id in hex
_uids++;
util_hex((uint8_t*)&_uids,4,c->uid);
// reliability
if(lob_get(open,"seq"))
{
c->seq = 1;
}
LOG("new %s channel %s %d %s",c->seq?"reliable":"unreliable",c->uid,id,type);
return c;
}
// process a decrypted channel packet
link_t link_receive(link_t link, lob_t inner, pipe_t pipe)
{
chan_t chan;
if(!link || !inner) return LOG("bad args");
// see if existing channel and send there
if((chan = xht_get(link->index, lob_get(inner,"c"))))
{
if(channel3_receive(chan->c3, inner)) return LOG("channel receive error, dropping %s",lob_json(inner));
link_pipe(link,pipe); // we trust the pipe at this point
if(chan->handle) chan->handle(link, chan->c3, chan->arg);
// check if there's any packets to be sent back
return link_flush(link, chan->c3, NULL);
}
// if it's an open, validate and fire event
if(!lob_get(inner,"type")) return LOG("invalid channel open, no type %s",lob_json(inner));
if(!exchange3_cid(link->x, inner)) return LOG("invalid channel open id %s",lob_json(inner));
link_pipe(link,pipe); // we trust the pipe at this point
inner = mesh_open(link->mesh,link,inner);
if(inner)
{
LOG("unhandled channel open %s",lob_json(inner));
lob_free(inner);
return NULL;
}
return link;
}
int main(int argc, char **argv)
{
fail_unless(e3x_init(NULL) == 0);
lob_t id = e3x_generate();
fail_unless(id);
e3x_self_t self = e3x_self_new(id,NULL);
fail_unless(self);
int i, count = 0;
for(i = 0; i < CS_MAX; i++)
{
if(!self->locals[i]) continue;
LOG("self testing CS %d",i);
count++;
fail_unless(self->locals[i]);
fail_unless(self->keys[i]);
fail_unless(self->keys[i]->body_len);
fail_unless(lob_get(self->keys[i],"key"));
fail_unless(lob_get(self->keys[i],"hash"));
fail_unless(strlen(lob_get(self->keys[i],"hash")) == 52);
}
fail_unless(count);
e3x_self_free(self);
lob_free(id);
return 0;
}
pipe_t tcp4_path(link_t link, lob_t path)
{
net_tcp4_t net;
char *ip;
int port;
// just sanity check the path first
if(!link || !path) return NULL;
if(!(net = xht_get(link->mesh->index, MUID))) return NULL;
if(util_cmp("tcp4",lob_get(path,"type"))) return NULL;
if(!(ip = lob_get(path,"ip"))) return LOG("missing ip");
if((port = lob_get_int(path,"port")) <= 0) return LOG("missing port");
return tcp4_pipe(net, ip, port);
}
// process an incoming handshake
link_t link_receive_handshake(link_t link, lob_t inner, pipe_t pipe)
{
link_t ready;
uint32_t out, err;
seen_t seen;
uint8_t csid = 0;
char *hexid;
lob_t attached, outer = lob_linked(inner);
if(!link || !inner || !outer) return LOG("bad args");
hexid = lob_get(inner, "csid");
if(!lob_get(link->mesh->keys, hexid)) return LOG("unsupported csid %s",hexid);
util_unhex(hexid, 2, &csid);
attached = lob_parse(inner->body, inner->body_len);
if(!link->key && link_key(link->mesh, attached, csid) != link) return LOG("invalid/mismatch link handshake");
if((err = e3x_exchange_verify(link->x,outer))) return LOG("handshake verification fail: %d",err);
out = e3x_exchange_out(link->x,0);
ready = link_up(link);
// if bad at, always send current handshake
if(e3x_exchange_in(link->x, lob_get_uint(inner,"at")) < out)
{
LOG("old/bad at: %s (%d,%d,%d)",lob_json(inner),lob_get_int(inner,"at"),e3x_exchange_in(link->x,0),e3x_exchange_out(link->x,0));
// just reset pipe seen and call link_sync to resend handshake
for(seen = link->pipes;pipe && seen;seen = seen->next) if(seen->pipe == pipe) seen->at = 0;
lob_free(link_sync(link));
return NULL;
}
// trust/add this pipe
if(pipe) link_pipe(link,pipe);
// try to sync ephemeral key
if(!e3x_exchange_sync(link->x,outer)) return LOG("sync failed");
// we may need to re-sync
if(out != e3x_exchange_out(link->x,0)) lob_free(link_sync(link));
// notify of ready state change
if(!ready && link_up(link))
{
LOG("link ready");
mesh_link(link->mesh, link);
}
return link;
}
// add a custom outgoing handshake packet to all links
mesh_t mesh_handshake(mesh_t mesh, lob_t handshake)
{
if(!mesh) return NULL;
if(handshake && !lob_get(handshake,"type")) return LOG("handshake missing a type: %s",lob_json(handshake));
mesh->handshakes = lob_link(handshake, mesh->handshakes);
return mesh;
}
link_t mesh_add(mesh_t mesh, lob_t json, pipe_t pipe)
{
link_t link;
lob_t keys, paths;
uint8_t csid;
if(!mesh || !json) return LOG("bad args");
LOG("mesh add %s",lob_json(json));
link = link_get(mesh, hashname_vchar(lob_get(json,"hashname")));
keys = lob_get_json(json,"keys");
paths = lob_get_array(json,"paths");
if(!link) link = link_keys(mesh, keys);
if(!link) LOG("no hashname");
LOG("loading keys/paths");
if(keys && (csid = hashname_id(mesh->keys,keys))) link_load(link, csid, keys);
// handle any pipe/paths
if(pipe) link_pipe(link, pipe);
lob_t path;
for(path=paths;path;path = lob_next(path)) link_path(link,path);
lob_free(keys);
lob_freeall(paths);
return link;
}
// this will set the default inactivity timeout using this event timer and our uid
uint32_t e3x_channel_timeout(e3x_channel_t c, e3x_event_t ev, uint32_t timeout)
{
if(!c) return 0;
// un-set any
if(ev != c->ev)
{
// cancel and clearn any previous timer state
c->timeout = 0;
if(c->ev) e3x_event_set(c->ev,NULL,c->uid,0);
c->ev = NULL;
lob_free(c->timer);
c->timer = NULL;
}
// no event manager, no timeouts
if(!ev) return 0;
// no timeout, just return how much time is left
if(!timeout) return _time_left(c);
// add/update new timeout
c->tsince = util_sys_seconds(); // start timer now
c->timeout = timeout;
c->ev = ev;
c->timer = lob_new();
lob_set_uint(c->timer,"c",c->id);
lob_set(c->timer, "id", c->uid);
lob_set(c->timer, "err", "timeout");
e3x_event_set(c->ev, c->timer, lob_get(c->timer, "id"), timeout*1000); // ms in the future
return _time_left(c);
}
// create/track a new channel for this open
channel3_t link_channel(link_t link, lob_t open)
{
chan_t chan;
channel3_t c3;
if(!link || !open) return LOG("bad args");
// add an outgoing cid if none set
if(!lob_get_int(open,"c")) lob_set_int(open,"c",exchange3_cid(link->x, NULL));
c3 = channel3_new(open);
if(!c3) return LOG("invalid open %s",lob_json(open));
LOG("new outgoing channel open: %s",lob_get(open,"type"));
// add this channel to the link's channel index
if(!(chan = malloc(sizeof (struct chan_struct))))
{
channel3_free(c3);
return LOG("OOM");
}
memset(chan,0,sizeof (struct chan_struct));
chan->c3 = c3;
xht_set(link->channels, channel3_uid(c3), chan);
xht_set(link->index, channel3_c(c3), chan);
return c3;
}
// process an incoming handshake
link_t link_receive_handshake(link_t link, lob_t inner)
{
uint32_t out, at, err;
uint8_t csid = 0;
lob_t outer = lob_linked(inner);
if(!link || !inner || !outer) return LOG("bad args");
// inner/link must be validated by caller already, we just load if missing
if(!link->key)
{
util_unhex(lob_get(inner, "csid"), 2, &csid);
if(!link_load(link, csid, inner))
{
lob_free(inner);
return LOG("load key failed for %s %u %s",hashname_short(link->id),csid,util_hex(inner->body,inner->body_len,NULL));
}
}
if((err = e3x_exchange_verify(link->x,outer)))
{
lob_free(inner);
return LOG("handshake verification fail: %d",err);
}
out = e3x_exchange_out(link->x,0);
at = lob_get_uint(inner,"at");
link_t ready = link_up(link);
// if bad at, always send current handshake
if(e3x_exchange_in(link->x, at) < out)
{
LOG("old handshake: %s (%d,%d,%d)",lob_json(inner),at,out);
link_sync(link);
lob_free(inner);
return link;
}
// try to sync ephemeral key
if(!e3x_exchange_sync(link->x,outer))
{
lob_free(inner);
return LOG("sync failed");
}
// we may need to re-sync
if(out != e3x_exchange_out(link->x,0)) link_sync(link);
// notify of ready state change
if(!ready && link_up(link))
{
LOG("link ready");
mesh_link(link->mesh, link);
}
link->handshake = lob_free(link->handshake);
link->handshake = inner;
return link;
}
int main(int argc, char **argv)
{
lob_t opts = lob_new();
fail_unless(e3x_init(opts) == 0);
fail_unless(!lob_get(opts,"err"));
fail_unless(!e3x_err());
lob_free(opts);
return 0;
}
uint8_t e3x_cipher_init(lob_t options)
{
e3x_cipher_default = NULL;
memset(e3x_cipher_sets, 0, CS_MAX * sizeof(e3x_cipher_t));
e3x_cipher_sets[CS_1a] = cs1a_init(options);
if(e3x_cipher_sets[CS_1a]) e3x_cipher_default = e3x_cipher_sets[CS_1a];
if(lob_get(options, "err")) return 1;
e3x_cipher_sets[CS_2a] = cs2a_init(options);
if(e3x_cipher_sets[CS_2a]) e3x_cipher_default = e3x_cipher_sets[CS_2a];
if(lob_get(options, "err")) return 1;
e3x_cipher_sets[CS_3a] = cs3a_init(options);
if(e3x_cipher_sets[CS_3a]) e3x_cipher_default = e3x_cipher_sets[CS_3a];
if(lob_get(options, "err")) return 1;
return 0;
}
uint8_t cipher3_init(lob_t options)
{
cipher3_default = NULL;
memset(cipher3_sets, 0, CS_MAX * sizeof(cipher3_t));
cipher3_sets[CS_1a] = cs1a_init(options);
if(cipher3_sets[CS_1a]) cipher3_default = cipher3_sets[CS_1a];
if(lob_get(options, "err")) return 1;
cipher3_sets[CS_2a] = cs2a_init(options);
if(cipher3_sets[CS_2a]) cipher3_default = cipher3_sets[CS_2a];
if(lob_get(options, "err")) return 1;
cipher3_sets[CS_3a] = cs3a_init(options);
if(cipher3_sets[CS_3a]) cipher3_default = cipher3_sets[CS_3a];
if(lob_get(options, "err")) return 1;
return 0;
}
// query the cache of handshakes for a matching one with a specific type
lob_t mesh_handshakes(mesh_t mesh, lob_t handshake, char *type)
{
lob_t matched;
char *id;
if(!mesh || !type || !(id = lob_get(handshake,"id"))) return LOG("bad args");
for(matched = mesh->cached;matched;matched = lob_match(matched->next,"id",id))
{
if(lob_get_cmp(matched,"type",type) == 0) return matched;
}
return NULL;
}
uint8_t e3x_exchange_validate(e3x_exchange_t x, lob_t args, lob_t sig, uint8_t *data, size_t len)
{
remote_t remote = NULL;
e3x_cipher_t cs = NULL;
char *alg = lob_get(args,"alg");
if(!data || !len || !alg) return 1;
cs = e3x_cipher_set(0,alg);
if(!cs || !cs->remote_validate)
{
LOG("no validate support for %s",alg);
return 1;
}
if(x && x->cs == cs) remote = x->remote;
return cs->remote_validate(remote,args,sig,data,len);
}
// create/track a new channel for this open
chan_t link_chan(link_t link, lob_t open)
{
chan_t c;
if(!link || !open) return LOG("bad args");
// add an outgoing cid if none set
if(!lob_get_int(open,"c")) lob_set_uint(open,"c",e3x_exchange_cid(link->x, NULL));
c = chan_new(open);
if(!c) return LOG("invalid open %s",lob_json(open));
LOG("new outgoing channel %d open: %s",chan_id(c), lob_get(open,"type"));
c->link = link;
c->next = link->chans;
link->chans = c;
return c;
}
uint8_t hashname_id(lob_t a, lob_t b)
{
uint8_t id, best;
uint32_t i;
char *key;
if(!a || !b) return 0;
best = 0;
for(i=0;(key = lob_get_index(a,i));i+=2)
{
if(strlen(key) != 2) continue;
if(!lob_get(b,key)) continue;
id = 0;
util_unhex(key,2,&id);
if(id > best) best = id;
}
return best;
}
// process a decrypted channel packet
link_t link_receive(link_t link, lob_t inner)
{
chan_t c;
if(!link || !inner) return LOG("bad args");
LOG("<-- %d",lob_get_int(inner,"c"));
// see if existing channel and send there
if((c = link_chan_get(link, lob_get_int(inner,"c"))))
{
LOG("found chan");
// consume inner
chan_receive(c, inner);
// process any changes
link->chans = link_process_chan(link->chans, 0);
return link;
}
// if it's an open, validate and fire event
if(!lob_get(inner,"type"))
{
LOG("invalid channel open, no type %s",lob_json(inner));
lob_free(inner);
return NULL;
}
if(!e3x_exchange_cid(link->x, inner))
{
LOG("invalid channel open id %s",lob_json(inner));
lob_free(inner);
return NULL;
}
inner = mesh_open(link->mesh,link,inner);
if(inner)
{
LOG("unhandled channel open %s",lob_json(inner));
lob_free(inner);
return NULL;
}
return link;
}
// get paths from host and query
lob_t util_uri_paths(lob_t uri)
{
uint32_t i;
uint16_t port;
uint8_t *buf;
size_t len;
char *key, *value;
lob_t paths, query = lob_linked(uri);
if(!query) return NULL;
paths = NULL;
// gen paths from host/port
if((port = lob_get_uint(uri,"port")))
{
key = lob_get(uri,"host");
paths = lob_chain(paths);
lob_set(paths,"type","upd4");
lob_set(paths,"ip",key);
lob_set_uint(paths,"port",port);
paths = lob_chain(paths);
lob_set(paths,"type","tcp4");
lob_set(paths,"ip",key);
lob_set_uint(paths,"port",port);
}
// loop through all keyval pairs to find paths
buf = NULL;
for(i=0;(key = lob_get_index(query,i));i+=2)
{
value = lob_get_index(query,i+1);
if(util_cmp(key,"paths") != 0 || !value) continue;
len = base32_decode_floor(strlen(value));
buf = util_reallocf(buf,len);
if(!buf) continue;
if(base32_decode(value,strlen(value),buf,len) < len) continue;
paths = lob_link(lob_parse(buf,len), paths);
}
free(buf);
return paths;
}
int main(int argc, char **argv)
{
lob_t id;
mesh_t mesh;
lob_t opts = lob_new();
fail_unless(e3x_init(opts) == 0);
fail_unless(!e3x_err());
// need cs1a support to continue testing
e3x_cipher_t cs = e3x_cipher_set(0x1a,NULL);
if(!cs) return 0;
cs = e3x_cipher_set(0,"1a");
fail_unless(cs);
fail_unless(cs->id == CS_1a);
uint8_t buf[32];
fail_unless(e3x_rand(buf,32));
char hex[65];
util_hex(e3x_hash((uint8_t*)"foo",3,buf),32,hex);
fail_unless(strcmp(hex,"2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae") == 0);
id = util_fjson("/Users/chrigel/.id.json");
if(!id) return -1;
lob_t secrets = lob_get_json(id,"secrets");
fail_unless(secrets);
fail_unless(lob_get(secrets,"1a"));
lob_t keys = lob_get_json(id,"keys");
fail_unless(keys);
fail_unless(lob_get(keys,"1a"));
LOG("generated key %s secret %s",lob_get(keys,"1a"),lob_get(secrets,"1a"));
local_t localA = cs->local_new(keys,secrets);
fail_unless(localA);
remote_t remoteA = cs->remote_new(lob_get_base32(keys,"1a"), NULL);
fail_unless(remoteA);
// create another to start testing real packets
lob_t secretsB = e3x_generate();
fail_unless(lob_linked(secretsB));
printf("XX %s\n",lob_json(lob_linked(secretsB)));
local_t localB = cs->local_new(lob_linked(secretsB),secretsB);
fail_unless(localB);
remote_t remoteB = cs->remote_new(lob_get_base32(lob_linked(secretsB),"1a"), NULL);
fail_unless(remoteB);
// generate a message
lob_t messageAB = lob_new();
lob_set_int(messageAB,"a",42);
lob_t outerAB = cs->remote_encrypt(remoteB,localA,messageAB);
fail_unless(outerAB);
fail_unless(lob_len(outerAB) == 42);
// decrypt and verify it
lob_t innerAB = cs->local_decrypt(localB,outerAB);
fail_unless(innerAB);
fail_unless(lob_get_int(innerAB,"a") == 42);
fail_unless(cs->remote_verify(remoteA,localB,outerAB) == 0);
ephemeral_t ephemBA = cs->ephemeral_new(remoteA,outerAB);
fail_unless(ephemBA);
lob_t channelBA = lob_new();
lob_set(channelBA,"type","foo");
lob_t couterBA = cs->ephemeral_encrypt(ephemBA,channelBA);
fail_unless(couterBA);
fail_unless(lob_len(couterBA) == 42);
lob_t outerBA = cs->remote_encrypt(remoteA,localB,messageAB);
fail_unless(outerBA);
ephemeral_t ephemAB = cs->ephemeral_new(remoteB,outerBA);
fail_unless(ephemAB);
lob_t cinnerAB = cs->ephemeral_decrypt(ephemAB,couterBA);
fail_unless(cinnerAB);
fail_unless(util_cmp(lob_get(cinnerAB,"type"),"foo") == 0);
return 0;
}
int main(int argc, char **argv)
{
lob_t packet;
packet = lob_new();
fail_unless(packet);
lob_free(packet);
uint8_t buf[1024];
char *hex = "001d7b2274797065223a2274657374222c22666f6f223a5b22626172225d7d616e792062696e61727921";
uint8_t len = strlen(hex)/2;
util_unhex(hex,strlen(hex),buf);
packet = lob_parse(buf,len);
fail_unless(packet);
fail_unless(lob_len(packet));
fail_unless(packet->head_len == 29);
fail_unless(packet->body_len == 11);
fail_unless(util_cmp(lob_get(packet,"type"),"test") == 0);
fail_unless(util_cmp(lob_get(packet,"foo"),"[\"bar\"]") == 0);
lob_free(packet);
packet = lob_new();
lob_set_base32(packet,"32",buf,len);
fail_unless(lob_get(packet,"32"));
fail_unless(strlen(lob_get(packet,"32")) == (base32_encode_length(len)-1));
lob_t bin = lob_get_base32(packet,"32");
fail_unless(bin);
fail_unless(bin->body_len == len);
lob_set(packet,"key","value");
fail_unless(lob_keys(packet) == 2);
// test sorting
lob_set(packet,"zz","value");
lob_set(packet,"a","value");
lob_set(packet,"z","value");
lob_sort(packet);
fail_unless(util_cmp(lob_get_index(packet,0),"32") == 0);
fail_unless(util_cmp(lob_get_index(packet,2),"a") == 0);
fail_unless(util_cmp(lob_get_index(packet,4),"key") == 0);
fail_unless(util_cmp(lob_get_index(packet,6),"z") == 0);
fail_unless(util_cmp(lob_get_index(packet,8),"zz") == 0);
lob_free(packet);
// minimal comparison test
lob_t a = lob_new();
lob_set(a,"foo","bar");
lob_t b = lob_new();
lob_set(b,"foo","bar");
fail_unless(lob_cmp(a,b) == 0);
lob_set(b,"bar","foo");
fail_unless(lob_cmp(a,b) != 0);
// lots of basic list testing
lob_t list = lob_new();
lob_t item = lob_new();
fail_unless(lob_push(list,item));
fail_unless(lob_pop(list) == item);
list = item->next;
fail_unless((list = lob_unshift(list,item)));
fail_unless(lob_shift(list) == item);
list = item->next;
fail_unless(lob_push(list,item));
fail_unless(list->next == item);
lob_t insert = lob_new();
fail_unless(lob_insert(list,list,insert));
fail_unless(list->next == insert);
fail_unless(insert->next == item);
fail_unless(lob_splice(list,insert));
fail_unless(list->next == item);
lob_t array = lob_array(list);
fail_unless(array);
fail_unless(util_cmp(lob_json(array),"[,]") == 0);
fail_unless(lob_freeall(list) == NULL);
// simple index testing
lob_t index = lob_new();
lob_t c1 = lob_new();
lob_set(c1,"id","c1");
lob_push(index,c1);
lob_t c2 = lob_new();
lob_set(c2,"id","c2");
lob_push(index,c2);
fail_unless(lob_match(index,"id","c1") == c1);
fail_unless(lob_match(index,"id","c2") == c2);
float f = 42.42;
lob_t ft = lob_new();
lob_head(ft,(uint8_t*)"{\"foo\":42.42}",13);
fail_unless(lob_get_float(ft,"foo") == f);
lob_set_float(ft,"bar2",f,2);
fail_unless(lob_get_float(ft,"bar2") == f);
lob_set_float(ft,"bar1",f,1);
fail_unless(lob_get_cmp(ft,"bar1","42.4") == 0);
lob_set_float(ft,"bar0",f,0);
fail_unless(lob_get_int(ft,"bar0") == 42);
LOG("floats %s",lob_json(ft));
return 0;
}
// process any unencrypted handshake packet
link_t mesh_receive_handshake(mesh_t mesh, lob_t handshake, pipe_t pipe)
{
uint32_t now;
hashname_t from;
link_t link;
if(!mesh || !handshake) return LOG("bad args");
if(!lob_get(handshake,"id"))
{
LOG("bad handshake, no id: %s",lob_json(handshake));
lob_free(handshake);
return NULL;
}
now = util_sys_seconds();
// normalize handshake
handshake->id = now; // save when we cached it
if(!lob_get(handshake,"type")) lob_set(handshake,"type","link"); // default to link type
if(!lob_get_uint(handshake,"at")) lob_set_uint(handshake,"at",now); // require an at
LOG("handshake at %d id %s",now,lob_get(handshake,"id"));
// validate/extend link handshakes immediately
if(util_cmp(lob_get(handshake,"type"),"link") == 0)
{
// get the csid
uint8_t csid = 0;
lob_t outer;
if((outer = lob_linked(handshake)))
{
csid = outer->head[0];
}else if(lob_get(handshake,"csid")){
util_unhex(lob_get(handshake,"csid"),2,&csid);
}
if(!csid)
{
LOG("bad link handshake, no csid: %s",lob_json(handshake));
lob_free(handshake);
return NULL;
}
char hexid[3] = {0};
util_hex(&csid, 1, hexid);
// get attached hashname
lob_t tmp = lob_parse(handshake->body, handshake->body_len);
from = hashname_vkey(tmp, csid);
if(!from)
{
LOG("bad link handshake, no hashname: %s",lob_json(handshake));
lob_free(tmp);
lob_free(handshake);
return NULL;
}
lob_set(handshake,"csid",hexid);
lob_set(handshake,"hashname",hashname_char(from));
lob_set_raw(handshake,hexid,2,"true",4); // intermediate format
lob_body(handshake, tmp->body, tmp->body_len); // re-attach as raw key
lob_free(tmp);
// short-cut, if it's a key from an existing link, pass it on
// TODO: using mesh_linked here is a stack issue during loopback peer test!
if((link = mesh_linkid(mesh,from))) return link_receive_handshake(link, handshake, pipe);
LOG("no link found for handshake from %s",hashname_char(from));
// extend the key json to make it compatible w/ normal patterns
tmp = lob_new();
lob_set_base32(tmp,hexid,handshake->body,handshake->body_len);
lob_set_raw(handshake,"keys",0,(char*)tmp->head,tmp->head_len);
lob_free(tmp);
// add the path if one
if(pipe && pipe->path)
{
char *paths = malloc(pipe->path->head_len+3);
sprintf(paths,"[%.*s]",(int)pipe->path->head_len,(char*)pipe->path->head);
lob_set_raw(handshake,"paths",0,paths,pipe->path->head_len+2);
free(paths);
}
}
// always add to the front of the cached list if needed in the future
mesh->cached = lob_unshift(mesh->cached, handshake);
// tell anyone listening about the newly discovered handshake
mesh_discover(mesh, handshake, pipe);
return NULL;
}
// this is a very simple single-pass telehash uri parser, no magic
lob_t util_uri_parse(char *encoded)
{
size_t klen, vlen;
char *at, *val;
lob_t uri;
if(!encoded) return LOG("bad args");
uri = lob_new();
lob_set(uri,"orig",encoded);
// check for protocol:// prefix first
if(!(at = strstr(encoded,"://")))
{
lob_set(uri, "protocol", "link");
}else{
lob_set_len(uri, "protocol", 0, encoded, (size_t)(at - encoded));
encoded = at+3;
}
// check for user@ prefix next
if((at = strchr(encoded,'@')))
{
lob_set_len(uri, "auth", 0, encoded, (size_t)(at - encoded));
encoded = at+1;
}
// ensure there's at least a host
if(!strlen(encoded) || !isalnum((int)encoded[0]))
{
lob_free(uri);
return LOG("invalid host: '%s'",encoded);
}
// copy in host and parse hostname/port
if((at = strchr(encoded,'/')) || (at = strchr(encoded,'?')) || (at = strchr(encoded,'#')))
{
lob_set_len(uri, "host", 0, encoded, (size_t)(at - encoded));
}else{
lob_set_len(uri, "host", 0, encoded, strlen(encoded));
}
// hostname+port
val = lob_get(uri, "host");
if(val && (at = strchr(val,':')))
{
lob_set_len(uri, "hostname", 0, val, (size_t)(at - val));
lob_set_uint(uri, "port", (uint16_t)strtoul(at+1,NULL,10));
}else{
lob_set(uri, "hostname", val);
}
// optional path
if((at = strchr(encoded,'/')))
{
encoded = at;
if((at = strchr(encoded+1,'?')) || (at = strchr(encoded+1,'#')))
{
lob_set_len(uri, "path", 0, encoded, (size_t)(at - encoded));
}else{
lob_set_len(uri, "path", 0, encoded, strlen(encoded));
}
}
// optional hash at the end
if((at = strchr(encoded,'#')))
{
lob_set_len(uri, "hash", 0, at+1, strlen(at+1));
}
// optional query string
if((at = strchr(encoded,'?')))
{
uri->chain = lob_new();
encoded = at+1;
if((at = strchr(encoded,'#')))
{
klen = (size_t)(at - encoded);
}else{
klen = strlen(encoded);
}
while(klen)
{
// skip any separator
if(*encoded == '&')
{
encoded++;
klen--;
}
// require the equals
if(!(val = strchr(encoded,'='))) break;
val++;
if((at = strchr(val,'&')))
{
vlen = (size_t)(at - val);
}else{
vlen = strlen(val);
}
lob_set_len(uri->chain, encoded, (size_t)(val-encoded)-1, val, vlen);
// skip past whole block
klen -= (size_t)((val+vlen) - encoded);
encoded = val + vlen;
}
}
return uri;
}
// serialize out from lob format to "uri" key and return it
char *util_uri_format(lob_t uri)
{
char *part, *key, *value;
uint32_t i, prev = 0;
lob_t buf, query;
if(!uri) return NULL;
// use a lob body as the buffer to build it up
buf = lob_new();
part = lob_get(uri, "protocol");
if(part)
{
lob_append_str(buf, part);
}else{
lob_append_str(buf, "link");
}
lob_append_str(buf, "://");
part = lob_get(uri, "hostname");
if(part)
{
lob_append_str(buf, part);
part = lob_get(uri, "port");
if(part)
{
lob_append_str(buf, ":");
lob_append_str(buf, part);
}
}else{
part = lob_get(uri, "host");
if(part) lob_append_str(buf, part);
}
part = lob_get(uri, "path");
if(part)
{
lob_append_str(buf, part);
}else{
lob_append_str(buf, "/");
}
// append on any query string
for(query = lob_linked(uri); query; query = lob_linked(query))
{
for(i=0;(key = lob_get_index(query,i));i+=2)
{
value = lob_get_index(query,i+1);
if(!strlen(key) || !value) continue; // paranoid
lob_append_str(buf,(prev++)?"&":"?");
lob_append_str(buf,key);
lob_append_str(buf,"=");
lob_append_str(buf,value);
}
}
if((part = lob_get(uri, "hash")))
{
lob_append_str(buf, "#");
lob_append_str(buf, part);
}
lob_set_len(uri,"uri",3,(char*)buf->body,buf->body_len);
lob_free(buf);
return lob_get(uri,"uri");
}
// processes incoming packet, it will take ownership of p
link_t mesh_receive(mesh_t mesh, lob_t outer, pipe_t pipe)
{
lob_t inner;
link_t link;
char token[17];
hashname_t id;
if(!mesh || !outer || !pipe) return LOG("bad args");
LOG("mesh receiving %s to %s via pipe %s",outer->head_len?"handshake":"channel",hashname_short(mesh->id),pipe->id);
// process handshakes
if(outer->head_len == 1)
{
inner = e3x_self_decrypt(mesh->self, outer);
if(!inner)
{
LOG("%02x handshake failed %s",outer->head[0],e3x_err());
lob_free(outer);
return NULL;
}
// couple the two together, inner->outer
lob_link(inner,outer);
// set the unique id string based on some of the first 16 (routing token) bytes in the body
base32_encode(outer->body,10,token,17);
lob_set(inner,"id",token);
// process the handshake
return mesh_receive_handshake(mesh, inner, pipe);
}
// handle channel packets
if(outer->head_len == 0)
{
if(outer->body_len < 16)
{
LOG("packet too small %d",outer->body_len);
lob_free(outer);
return NULL;
}
route_t route;
for(route = mesh->routes;route;route = route->next) if(memcmp(route->token,outer->body,8) == 0) break;
link = route ? route->link : NULL;
if(!link)
{
LOG("dropping, no link for token %s",util_hex(outer->body,16,NULL));
lob_free(outer);
return NULL;
}
// forward packet
if(!route->flag)
{
LOG("forwarding route token %s via %s len %d",util_hex(route->token,8,NULL),hashname_short(link->id),lob_len(outer));
return link_send(link, outer);
}
inner = e3x_exchange_receive(link->x, outer);
lob_free(outer);
if(!inner) return LOG("channel decryption fail for link %s %s",hashname_short(link->id),e3x_err());
LOG("channel packet %d bytes from %s",lob_len(inner),hashname_short(link->id));
return link_receive(link,inner,pipe);
}
// transform incoming bare link json format into handshake for discovery
if((inner = lob_get_json(outer,"keys")))
{
if((id = hashname_vkeys(inner)))
{
lob_set(outer,"hashname",hashname_char(id));
lob_set_int(outer,"at",0);
lob_set(outer,"type","link");
LOG("bare incoming link json being discovered %s",lob_json(outer));
}
lob_free(inner);
}
// run everything else through discovery, usually plain handshakes
mesh_discover(mesh, outer, pipe);
link = mesh_linked(mesh, lob_get(outer,"hashname"), 0);
lob_free(outer);
return link;
}