/
proto_hep.c
1435 lines (1190 loc) · 35.5 KB
/
proto_hep.c
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/*
* Copyright (C) 2015 - OpenSIPS Solutions
*
* This file is part of opensips, a free SIP server.
*
* opensips is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* opensips is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* History:
* -------
* 2015-08-14 first version (Ionut Ionita)
*/
#include <poll.h>
#include <errno.h>
#include <unistd.h>
#include <netinet/tcp.h>
#include <fcntl.h>
#include "../../timer.h"
#include "../../sr_module.h"
#include "../../net/api_proto.h"
#include "../../net/api_proto_net.h"
#include "../../net/net_tcp.h"
#include "../../net/net_udp.h"
#include "../../socket_info.h"
#include "../../receive.h"
#include "../../tsend.h"
#include "../../net/proto_tcp/tcp_common_defs.h"
#include "../../net/proto_tcp/tcp_common_defs.h"
#include "../../pt.h"
#include "../../ut.h"
#include "../compression/compression_api.h"
#include "hep.h"
#include "hep_cb.h"
static int mod_init(void);
static void destroy(void); /*!< Module destroy function */
static int proto_hep_init_udp(struct proto_info *pi);
static int proto_hep_init_tcp(struct proto_info *pi);
static int proto_hep_init_udp_listener(struct socket_info *si);
static int hep_conn_init(struct tcp_connection* c);
static void hep_conn_clean(struct tcp_connection* c);
static int hep_write_async_req(struct tcp_connection* con,int fd);
static int hep_tcp_read_req(struct tcp_connection* con, int* bytes_read);
static int hep_udp_read_req(struct socket_info *si, int* bytes_read);
static int hep_udp_send (struct socket_info* send_sock,
char *buf, unsigned int len, union sockaddr_union *to, int id);
static int hep_tcp_send (struct socket_info* send_sock,
char *buf, unsigned int len, union sockaddr_union *to, int id);
static void update_recv_info(struct receive_info *ri, struct hep_desc *h);
void free_hep_context(void* ptr);
static int hep_port = HEP_PORT;
static int hep_async = 1;
static int hep_send_timeout = 100;
static int hep_async_max_postponed_chunks = 32;
static int hep_max_msg_chunks = 32;
static int hep_async_local_connect_timeout = 100;
static int hep_async_local_write_timeout = 10;
int hep_ctx_idx=0;
int hep_capture_id = 1;
int payload_compression=0;
int homer5_on=1;
str homer5_delim = {":", 0};
compression_api_t compression_api;
load_compression_f load_compression;
static struct tcp_req hep_current_req;
/* we consider that different messages may contain different versions of hep
* so we need to know what is the current version of hep */
static int hep_current_proto;
union sockaddr_union local_su;
struct hep_send_chunk {
char *buf; /* buffer that needs to be sent out */
char *pos; /* the position that we should be writing next */
int len; /* length of the buffer */
int ticks; /* time at which this chunk was initially
attempted to be written */
};
struct hep_data {
/* the chunks that need to be written on this
* connection when it will become writable */
struct hep_send_chunk **async_chunks;
/* the total number of chunks pending to be written */
int async_chunks_no;
/* the oldest chunk in our write list */
int oldest_chunk;
};
static cmd_export_t cmds[] = {
{"proto_init", (cmd_function)proto_hep_init_udp, {{0,0,0}}, 0},
{"proto_init", (cmd_function)proto_hep_init_tcp, {{0,0,0}}, 0},
{"load_hep", (cmd_function)bind_proto_hep, {{0,0,0}}, 0},
{"trace_bind_api", (cmd_function)hep_bind_trace_api, {{0,0,0}}, 0},
{"correlate", (cmd_function)correlate_w, {
{CMD_PARAM_STR,0,0},
{CMD_PARAM_STR|CMD_PARAM_OPT,0,0}, {0,0,0}},
REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE},
{0,0,{{0,0,0}},0}
};
static param_export_t params[] = {
{ "hep_port", INT_PARAM, &hep_port },
{ "hep_send_timeout", INT_PARAM, &hep_send_timeout },
{ "hep_max_msg_chunks", INT_PARAM, &hep_max_msg_chunks },
{ "hep_async", INT_PARAM, &hep_async },
{ "hep_async_max_postponed_chunks", INT_PARAM,
&hep_async_max_postponed_chunks },
/* what protocol shall be used: 1, 2 or 3 */
{ "hep_capture_id", INT_PARAM, &hep_capture_id },
{ "hep_async_local_connect_timeout", INT_PARAM,
&hep_async_local_connect_timeout},
{ "hep_async_local_write_timeout", INT_PARAM,
&hep_async_local_write_timeout },
{ "compressed_payload", INT_PARAM, &payload_compression},
{ "hep_id", STR_PARAM|USE_FUNC_PARAM, parse_hep_id },
{ "homer5_on", INT_PARAM, &homer5_on },
{ "homer5_delim", STR_PARAM, &homer5_delim.s },
{0, 0, 0}
};
static module_dependency_t *get_deps_compression(param_export_t *param)
{
int do_compression= *(int *)param->param_pointer;
if (do_compression == 0)
return NULL;
return alloc_module_dep(MOD_TYPE_DEFAULT, "compression", DEP_ABORT);
}
static dep_export_t deps = {
{ /* OpenSIPS module dependencies */
{ MOD_TYPE_NULL, NULL, 0 },
},
{ /* modparam dependencies */
{"compressed_payload", get_deps_compression},
{ NULL, NULL },
},
};
struct module_exports exports = {
PROTO_PREFIX "hep", /* module name*/
MOD_TYPE_DEFAULT,/* class of this module */
MODULE_VERSION,
DEFAULT_DLFLAGS, /* dlopen flags */
&deps, /* OpenSIPS module dependencies */
cmds, /* exported functions */
0, /* exported async functions */
params, /* module parameters */
0, /* exported statistics */
0, /* exported MI functions */
0, /* exported pseudo-variables */
0, /* exported transformations */
0, /* extra processes */
mod_init, /* module initialization function */
0, /* response function */
destroy, /* destroy function */
0, /* per-child init function */
};
static int mod_init(void)
{
/* check if any listeners defined for this proto */
if ( !protos[PROTO_HEP_UDP].listeners && !protos[PROTO_HEP_TCP].listeners ) {
LM_ERR("No HEP listener defined, neither TCP nor UDP!\n");
return -1;
}
if (payload_compression) {
load_compression =
(load_compression_f)find_export("load_compression", 0);
if (!load_compression) {
LM_ERR("can't bind compression module!\n");
return -1;
}
if (load_compression(&compression_api)) {
LM_ERR("failed to load compression api!\n");
return -1;
}
}
hep_ctx_idx = context_register_ptr(CONTEXT_GLOBAL, 0);
homer5_delim.len = strlen(homer5_delim.s);
local_su.sin.sin_addr.s_addr = TRACE_INADDR_LOOPBACK;
local_su.sin.sin_port = 0;
local_su.sin.sin_family = AF_INET;
return 0;
}
static void destroy(void)
{
free_hep_cbs();
}
void free_hep_context(void *ptr)
{
struct hep_desc* h;
struct hep_context* ctx = (struct hep_context*)ptr;
generic_chunk_t* it;
generic_chunk_t* foo=NULL;
h = &ctx->h;
/* for version 3 we may have custom chunks which are in shm so we
* need to free them */
if (h->version == 3) {
it = h->u.hepv3.chunk_list;
while (it) {
if (foo) {
shm_free(foo->data);
shm_free(foo);
}
foo=it;
it=it->next;
}
if (foo) {
shm_free(foo->data);
shm_free(foo);
}
}
shm_free(ctx);
}
static int proto_hep_init_udp(struct proto_info *pi)
{
pi->id = PROTO_HEP_UDP;
pi->name = "hep_udp";
pi->default_port = hep_port;
pi->tran.init_listener = proto_hep_init_udp_listener;
pi->tran.send = hep_udp_send;
pi->net.flags = PROTO_NET_USE_UDP;
pi->net.read = (proto_net_read_f)hep_udp_read_req;
return 0;
}
static int proto_hep_init_tcp(struct proto_info *pi)
{
pi->id = PROTO_HEP_TCP;
pi->name = "hep_tcp";
pi->default_port = hep_port;
pi->tran.init_listener = tcp_init_listener;
pi->tran.dst_attr = tcp_conn_fcntl;
pi->net.flags = PROTO_NET_USE_TCP;
pi->net.read = (proto_net_read_f)hep_tcp_read_req;
pi->net.write = (proto_net_write_f)hep_write_async_req;
pi->tran.send = hep_tcp_send;
if (hep_async) {
pi->net.conn_init = hep_conn_init;
pi->net.conn_clean = hep_conn_clean;
}
return 0;
}
static int hep_conn_init(struct tcp_connection* c)
{
struct hep_data *d;
/* allocate the tcp_data and the array of chunks as a single mem chunk */
d = (struct hep_data*)shm_malloc( sizeof(struct hep_data) +
sizeof(struct hep_send_chunk *) * hep_async_max_postponed_chunks );
if (d == NULL) {
LM_ERR("failed to create tcp chunks in shm mem\n");
return -1;
}
d->async_chunks = (struct hep_send_chunk **)(d+1);
d->async_chunks_no = 0;
d->oldest_chunk = 0;
c->proto_data = (void*)d;
return 0;
}
static void hep_conn_clean(struct tcp_connection* c)
{
struct hep_data *d = (struct hep_data*)c->proto_data;
int r;
for (r = 0; r < d->async_chunks_no; r++) {
shm_free(d->async_chunks[r]);
}
shm_free(d);
c->proto_data = NULL;
}
static int proto_hep_init_udp_listener(struct socket_info *si)
{
return udp_init_listener(si, hep_async?O_NONBLOCK:0);
}
static int add_write_chunk(struct tcp_connection *con,char *buf,int len,
int lock)
{
struct hep_send_chunk *c;
struct hep_data *d = (struct hep_data*)con->proto_data;
c = shm_malloc(sizeof(struct hep_send_chunk) + len);
if (!c) {
LM_ERR("No more SHM\n");
return -1;
}
c->len = len;
c->ticks = get_ticks();
c->buf = (char *)(c+1);
memcpy(c->buf,buf,len);
c->pos = c->buf;
if (lock)
lock_get(&con->write_lock);
if (d->async_chunks_no == hep_async_max_postponed_chunks) {
LM_ERR("We have reached the limit of max async postponed chunks\n");
if (lock)
lock_release(&con->write_lock);
shm_free(c);
return -2;
}
d->async_chunks[d->async_chunks_no++] = c;
if (d->async_chunks_no == 1)
d->oldest_chunk = c->ticks;
if (lock)
lock_release(&con->write_lock);
return 0;
}
static int async_tsend_stream(struct tcp_connection *c,
int fd, char* buf, unsigned int len, int timeout)
{
int written;
int n;
struct pollfd pf;
pf.fd=fd;
pf.events=POLLOUT;
written=0;
again:
n=send(fd, buf, len,0);
if (n<0){
if (errno==EINTR) goto again;
else if (errno!=EAGAIN && errno!=EWOULDBLOCK) {
LM_ERR("Failed first TCP async send : (%d) %s\n",
errno, strerror(errno));
return -1;
} else
goto poll_loop;
}
written+=n;
if (n < len) {
/* partial write */
buf += n;
len -= n;
} else {
/* successful write from the first try */
LM_DBG("Async successful write from first try on %p\n",c);
return len;
}
poll_loop:
n = poll(&pf,1,timeout);
if (n<0) {
if (errno==EINTR)
goto poll_loop;
LM_ERR("Polling while trying to async send failed %s [%d]\n",
strerror(errno), errno);
return -1;
} else if (n == 0) {
LM_DBG("timeout -> do an async write (add it to conn)\n");
/* timeout - let's just pass to main */
if (add_write_chunk(c,buf,len,0) < 0) {
LM_ERR("Failed to add write chunk to connection \n");
return -1;
} else {
/* we have successfully added async write chunk
* tell MAIN to poll out for us */
LM_DBG("Data still pending for write on conn %p\n",c);
return 0;
}
}
if (pf.revents&POLLOUT)
goto again;
/* some other events triggered by poll - treat as errors */
return -1;
}
static struct tcp_connection* hep_sync_connect(struct socket_info* send_sock,
union sockaddr_union* server, int *fd)
{
int s;
union sockaddr_union my_name;
socklen_t my_name_len;
struct tcp_connection* con;
s=socket(AF2PF(server->s.sa_family), SOCK_STREAM, 0);
if (s==-1){
LM_ERR("socket: (%d) %s\n", errno, strerror(errno));
goto error;
}
if (tcp_init_sock_opt(s)<0){
LM_ERR("tcp_init_sock_opt failed\n");
goto error;
}
my_name_len = sockaddru_len(send_sock->su);
memcpy( &my_name, &send_sock->su, my_name_len);
su_setport( &my_name, 0);
if (bind(s, &my_name.s, my_name_len )!=0) {
LM_ERR("bind failed (%d) %s\n", errno,strerror(errno));
goto error;
}
if (tcp_connect_blocking(s, &server->s, sockaddru_len(*server))<0){
LM_ERR("tcp_blocking_connect failed\n");
goto error;
}
con = tcp_conn_create(s, server, send_sock, S_CONN_OK);
if (con==NULL){
LM_ERR("tcp_conn_create failed, closing the socket\n");
goto error;
}
*fd = s;
return con;
/*FIXME: set sock idx! */
error:
/* close the opened socket */
if (s!=-1) close(s);
return 0;
}
static int tcpconn_async_connect(struct socket_info* send_sock,
union sockaddr_union* server, char *buf, unsigned len,
struct tcp_connection** c, int *ret_fd)
{
int fd, n;
union sockaddr_union my_name;
socklen_t my_name_len;
struct tcp_connection* con;
struct pollfd pf;
unsigned int elapsed,to;
int err;
unsigned int err_len;
int poll_err;
char *ip;
unsigned short port;
struct timeval begin;
/* create the socket */
fd = socket(AF2PF(server->s.sa_family), SOCK_STREAM, 0);
if (fd == -1){
LM_ERR("socket: (%d) %s\n", errno, strerror(errno));
return -1;
}
if (tcp_init_sock_opt(fd)<0){
LM_ERR("tcp_init_sock_opt failed\n");
goto error;
}
my_name_len = sockaddru_len(send_sock->su);
memcpy( &my_name, &send_sock->su, my_name_len);
su_setport( &my_name, 0);
if (bind(fd, &my_name.s, my_name_len )!=0) {
LM_ERR("bind failed (%d) %s\n", errno,strerror(errno));
goto error;
}
/* attempt to do connect and see if we do block or not */
poll_err = 0;
elapsed = 0;
to = hep_async_local_connect_timeout*1000;
if (gettimeofday(&(begin), NULL)) {
LM_ERR("Failed to get TCP connect start time\n");
goto error;
}
again:
n = connect(fd, &server->s, sockaddru_len(*server));
if (n == -1) {
if (errno == EINTR){
elapsed=get_time_diff(&begin);
if (elapsed < to) goto again;
else {
LM_DBG("Local connect attempt failed \n");
goto async_connect;
}
}
if (errno != EINPROGRESS && errno!=EALREADY) {
get_su_info(&server->s, ip, port);
LM_ERR("[server=%s:%d] (%d) %s\n",ip, port, errno,strerror(errno));
goto error;
}
} else goto local_connect;
/* let's poll for a little */
pf.fd = fd;
pf.events = POLLOUT;
while(1){
elapsed = get_time_diff(&begin);
if (elapsed < to)
to -= elapsed;
else {
LM_DBG("Polling is overdue \n");
goto async_connect;
}
n = poll(&pf, 1, to/1000);
if (n < 0){
if (errno == EINTR) continue;
get_su_info(&server->s, ip, port);
LM_ERR("poll/select failed:[server=%s:%d] (%d) %s\n",
ip, port, errno, strerror(errno));
goto error;
} else if (n==0) /* timeout */ continue;
if (pf.revents & (POLLERR|POLLHUP|POLLNVAL)){
LM_ERR("poll error: flags %x\n", pf.revents);
poll_err=1;
}
err_len=sizeof(err);
getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &err_len);
if ((err==0) && (poll_err==0)) goto local_connect;
if (err!=EINPROGRESS && err!=EALREADY){
get_su_info(&server->s, ip, port);
LM_ERR("failed to retrieve SO_ERROR [server=%s:%d] (%d) %s\n",
ip, port, err, strerror(err));
goto error;
}
}
async_connect:
LM_DBG("Create connection for async connect\n");
/* create a new dummy connection */
con = tcp_conn_create(fd, server, send_sock, S_CONN_CONNECTING);
if (con==NULL) {
LM_ERR("tcp_conn_create failed\n");
goto error;
}
/* attach the write buffer to it */
lock_get(&con->write_lock);
if (add_write_chunk(con,buf,len,0) < 0) {
LM_ERR("Failed to add the initial write chunk\n");
/* FIXME - seems no more SHM now ...
* continue the async connect process ? */
}
lock_release(&con->write_lock);
/* report an async, in progress connect */
*c = con;
return 0;
local_connect:
con = tcp_conn_create(fd, server, send_sock, S_CONN_OK);
if (con==NULL) {
LM_ERR("tcp_conn_create failed, closing the socket\n");
goto error;
}
*c = con;
*ret_fd = fd;
/* report a local connect */
return 1;
error:
close(fd);
*c = NULL;
return -1;
}
inline static int _hep_write_on_socket(struct tcp_connection *c, int fd,
char *buf, int len){
int n;
lock_get(&c->write_lock);
if (hep_async) {
/*
* if there is any data pending to write, we have to wait for those chunks
* to be sent, otherwise we will completely break the messages' order
*/
if (((struct hep_data*)c->proto_data)->async_chunks_no)
n = add_write_chunk(c, buf, len, 0);
else
n = async_tsend_stream(c,fd,buf,len, hep_async_local_write_timeout);
} else {
n = tsend_stream(fd, buf, len, hep_send_timeout);
}
lock_release(&c->write_lock);
return n;
}
static int hep_udp_send (struct socket_info* send_sock,
char *buf, unsigned int len, union sockaddr_union *to, int id)
{
int n, tolen;
tolen=sockaddru_len(*to);
again:
n=sendto(send_sock->socket, buf, len, 0, &to->s, tolen);
if (n==-1){
LM_ERR("sendto(sock,%p,%d,0,%p,%d): %s(%d)\n", buf,len,to,tolen,
strerror(errno),errno);
if (errno==EINTR || errno==EAGAIN) goto again;
if (errno==EINVAL) {
LM_CRIT("invalid sendtoparameters\n"
"one possible reason is the server is bound to localhost and\n"
"attempts to send to the net\n");
}
}
return n;
}
static int hep_tcp_send (struct socket_info* send_sock,
char *buf, unsigned int len, union sockaddr_union *to, int id)
{
struct tcp_connection *c;
int port=0;
struct ip_addr ip;
int fd, n;
if (to) {
su2ip_addr(&ip, to);
port=su_getport(to);
n = tcp_conn_get(id,&ip, port, PROTO_HEP_TCP, &c, &fd);
} else if (id) {
n = tcp_conn_get(id, 0, 0, PROTO_NONE, &c, &fd);
} else {
LM_CRIT("tcp_send called with null id & to\n");
return -1;
}
if (n < 0) {
/* error during conn get, return with error too */
LM_ERR("failed to acquire connection\n");
return -1;
}
/* was connection found ?? */
if (c==0) {
if (tcp_no_new_conn) {
return -1;
}
if (!to) {
LM_ERR("Unknown destination - cannot open new tcp connection\n");
return -1;
}
LM_DBG("no open tcp connection found, opening new one, async = %d\n",hep_async);
/* create tcp connection */
if (hep_async) {
n = tcpconn_async_connect(send_sock, to, buf, len, &c, &fd);
if ( n<0 ) {
LM_ERR("async TCP connect failed\n");
return -1;
}
/* connect succeeded, we have a connection */
if (n==0) {
/* mark the ID of the used connection (tracing purposes) */
last_outgoing_tcp_id = c->id;
/* connect is still in progress, break the sending
* flow now (the actual write will be done when
* connect will be completed */
LM_DBG("Successfully started async connection \n");
tcp_conn_release(c, 0);
return len;
}
/* our first connect attempt succeeded - go ahead as normal */
} else if ((c=hep_sync_connect(send_sock, to, &fd))==0) {
LM_ERR("connect failed\n");
return -1;
}
goto send_it;
}
/* now we have a connection, let's see what we can do with it */
/* BE CAREFUL now as we need to release the conn before exiting !!! */
if (fd==-1) {
/* connection is not writable because of its state - can we append
* data to it for later writting (async writting)? */
if (c->state==S_CONN_CONNECTING) {
/* the connection is currently in the process of getting
* connected - let's append our send chunk as well - just in
* case we ever manage to get through */
LM_DBG("We have acquired a TCP connection which is still "
"pending to connect - delaying write \n");
n = add_write_chunk(c,buf,len,1);
if (n < 0) {
LM_ERR("Failed to add another write chunk to %p\n",c);
/* we failed due to internal errors - put the
* connection back */
tcp_conn_release(c, 0);
return -1;
}
/* mark the ID of the used connection (tracing purposes) */
last_outgoing_tcp_id = c->id;
/* we successfully added our write chunk - success */
tcp_conn_release(c, 0);
return len;
} else {
/* return error, nothing to do about it */
tcp_conn_release(c, 0);
return -1;
}
}
send_it:
LM_DBG("sending via fd %d...\n",fd);
n = _hep_write_on_socket(c, fd, buf, len);
tcp_conn_set_lifetime( c, tcp_con_lifetime);
LM_DBG("after write: c= %p n/len=%d/%d fd=%d\n",c, n, len, fd);
/* LM_DBG("buf=\n%.*s\n", (int)len, buf); */
if (n<0){
LM_ERR("failed to send\n");
c->state=S_CONN_BAD;
if (c->proc_id != process_no)
close(fd);
tcp_conn_release(c, 0);
return -1;
}
/* only close the FD if not already in the context of our process
either we just connected, or main sent us the FD */
if (c->proc_id != process_no)
close(fd);
/* mark the ID of the used connection (tracing purposes) */
last_outgoing_tcp_id = c->id;
tcp_conn_release(c, (n<len)?1:0/*pending data in async mode?*/ );
return n;
}
static void hep_parse_headers(struct tcp_req *req){
/* message length */
u_int16_t length=0;
hep_ctrl_t *ctrl;
if(req->content_len == 0 &&
req->pos - req->buf < sizeof(hep_ctrl_t)){
/* not enough intel; keep watching son */
return;
}
/* check for hepV3 header id; if tcp it's hepv3 */
if (memcmp(req->buf, HEP_HEADER_ID, HEP_HEADER_ID_LEN)) {
/* version 3*/
LM_ERR("not a hepV3 message\n");
return;
}
hep_current_proto = 3;
ctrl = (hep_ctrl_t *)req->buf;
length = ntohs(ctrl->length);
req->content_len = (unsigned short)length;
if(req->pos - req->buf == req->content_len){
LM_DBG("received a COMPLETE message\n");
req->complete = 1;
req->parsed = req->buf + req->content_len;
} else if(req->pos - req->buf > req->content_len){
LM_DBG("received MORE than a message\n");
req->complete = 1;
req->parsed = req->buf + req->content_len;
} else {
LM_DBG("received only PART of a message\n");
/* FIXME should we update parsed? we didn't receive the
* full message; we wait for the full mesage and only
* after that we update parsed */
req->parsed = req->pos;
}
}
static int _tcp_read(struct tcp_connection *c,struct tcp_req *r) {
int bytes_free, bytes_read;
int fd;
fd = c->fd;
bytes_free=TCP_BUF_SIZE- (int)(r->pos - r->buf);
if (bytes_free==0){
LM_ERR("buffer overrun, dropping\n");
r->error=TCP_REQ_OVERRUN;
return -1;
}
again:
bytes_read=read(fd, r->pos, bytes_free);
if(bytes_read==-1){
if (errno == EWOULDBLOCK || errno == EAGAIN){
return 0; /* nothing has been read */
} else if (errno == EINTR) {
goto again;
} else if (errno == ECONNRESET) {
c->state=S_CONN_EOF;
LM_DBG("EOF on %p, FD %d\n", c, fd);
bytes_read = 0;
} else {
LM_ERR("error reading: %s\n",strerror(errno));
r->error=TCP_READ_ERROR;
return -1;
}
}else if (bytes_read==0){
c->state=S_CONN_EOF;
LM_DBG("EOF on %p, FD %d\n", c, fd);
}
#ifdef EXTRA_DEBUG
LM_DBG("read %d bytes:\n%.*s\n", bytes_read, bytes_read, r->pos);
#endif
r->pos+=bytes_read;
return bytes_read;
}
static inline int hep_handle_req(struct tcp_req *req,
struct tcp_connection *con, int _max_msg_chunks)
{
struct receive_info local_rcv;
char *msg_buf;
int msg_len;
long size;
int ret=0;
struct hep_context *hep_ctx=NULL;
context_p ctx=NULL;
if (req->complete){
/* update the timeout - we successfully read the request */
tcp_conn_set_lifetime( con, tcp_con_lifetime);
con->timeout=con->lifetime;
/* just for debugging use sendipv4 as receiving socket FIXME*/
con->rcv.proto_reserved1=con->id; /* copy the id */
/* prepare for next request */
size=req->pos-req->parsed;
msg_buf = req->buf;
msg_len = req->parsed-req->start;
local_rcv = con->rcv;
if (!size) {
/* did not read any more things - we can release
* the connection */
LM_DBG("Nothing more to read on TCP conn %p, currently in state %d \n",
con,con->state);
if (req != &hep_current_req) {
/* we have the buffer in the connection tied buff -
* detach it , release the conn and free it afterwards */
con->con_req = NULL;
}
/* TODO - we could indicate to the TCP net layer to release
* the connection -> other worker may read the next available
* message on the pipe */
} else {
LM_DBG("We still have things on the pipe - "
"keeping connection \n");
}
if( msg_buf[0] == 'H' && msg_buf[1] == 'E' && msg_buf[2] == 'P' ) {
if ((hep_ctx = shm_malloc(sizeof(struct hep_context))) == NULL) {
LM_ERR("no more shared memory!\n");
return -1;
}
memset(hep_ctx, 0, sizeof(struct hep_context));
memcpy(&hep_ctx->ri, &local_rcv, sizeof(struct receive_info));
/* HEP related */
if (unpack_hepv3(msg_buf, msg_len, &hep_ctx->h)) {
LM_ERR("failed to unpack hepV3\n");
goto error_free_hep;
}
update_recv_info(&local_rcv, &hep_ctx->h);
/* set context for receive_msg */
if ((ctx=context_alloc(CONTEXT_GLOBAL)) == NULL) {
LM_ERR("failed to allocate new context! skipping...\n");
goto error_free_hep;
}
memset(ctx, 0, context_size(CONTEXT_GLOBAL));
context_put_ptr(CONTEXT_GLOBAL, ctx, hep_ctx_idx, hep_ctx);
/* run hep callbacks; set the current processing context
* to hep context; this way callbacks will have all the data
* needed */
current_processing_ctx = ctx;
ret=run_hep_cbs();
if (ret < 0) {
LM_ERR("failed to run hep callbacks\n");
goto error_free_hep;
}
current_processing_ctx = NULL;
msg_len = hep_ctx->h.u.hepv3.payload_chunk.chunk.length-
sizeof(hep_chunk_t);
/* remove the hep header; leave only the payload */
msg_buf = hep_ctx->h.u.hepv3.payload_chunk.data;
}
/* skip receive msg if we were told so from at least one callback */
if ( ret != HEP_SCRIPT_SKIP ) {
if ( receive_msg(msg_buf, msg_len, &local_rcv, ctx, 0) <0 ) {
LM_ERR("receive_msg failed \n");
}
} else {
if ( ctx ) {
context_free( ctx );
}
}
if (hep_ctx)
free_hep_context(hep_ctx);
if (!size && req != &hep_current_req) {
/* if we no longer need this tcp_req
* we can free it now */
pkg_free(req);
}
con->msg_attempts = 0;