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compression.c
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compression.c
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/*
* Copyright (C) 2014 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include "zlib.h"
#include "../../sr_module.h"
#include "../../db/db.h"
#include "../../dprint.h"
#include "../../error.h"
#include "../../ut.h"
#include "../../action.h"
#include "../../script_var.h"
#include "../../dset.h"
#include "../../mem/mem.h"
#include "../../mi/mi.h"
#include "../../parser/parse_to.h"
#include "../../parser/msg_parser.h"
#include "../../parser/parse_hname2.h"
#include "../../parser/sdp/sdp_helpr_funcs.h"
#include "../../mod_fix.h"
#include "../../data_lump.c"
#include "../../ut.h"
#include "../../msg_translator.h"
#include "../tm/tm_load.h"
#include "../../script_cb.h"
#include "../../context.h"
#include "../../parser/hf.h"
#include "compression.h"
#include "compression_helpers.h"
#include "gz_helpers.h"
#include "compression_api.h"
#define CL_NAME "Content-Length: "
#define CL_NAME_LEN (sizeof(CL_NAME) - 1)
#define CE_NAME "Content-Encoding: "
#define CE_NAME_LEN (sizeof(CE_NAME) - 1)
#define GZIP_CE "Content-Encoding: gzip\r\n"
#define GZIP_CE_LEN (sizeof(GZIP_CE) - 1)
#define DEFLATE_CE "Content-Encoding: deflate\r\n"
#define DEFLATE_CE_LEN (sizeof(DEFLATE_CE) - 1)
#define COMP_HDRS "Comp-Hdrs: "
#define COMP_HDRS_LEN (sizeof(COMP_HDRS) - 1)
#define HDRS_ENCODING "Headers-Encoding: "
#define GZIP_ALGO "gzip"
#define DEFLATE_ALGO "deflate"
#define BASE64_ALGO "base64"
#define DELIM ": "
#define ATTR_DELIM ", "
#define DELIM_LEN (sizeof(DELIM) - 1)
#define ATTR_DELIM_LEN (sizeof(ATTR_DELIM) - 1)
#define NO_FORM 255
#define is_space(p) (*(p) == ' ')
#define veclen(_vec_, _type_) (sizeof(_vec_)/sizeof(_type_))
#define PARSE_CRLF 0x0a0d
#define WORD(p) (*(p + 0) + (*(p + 1) << 8))
#define DWORD(p) (*(p+0) + (*(p+1) << 8) + (*(p+2) << 16) + (*(p+3) << 24))
#define LOWER_CASE(p) (*(p) & 0x20)
#define BUFLEN 4096
#define COMPACT_FORMS "cfiklmstvx"
#define TM_CB (1<<0)
#define PROCESSING_CB (1<<1)
#define COMPRESS_CB (1<<0)
#define COMPACT_CB (1<<1)
#define SET_GLOBAL_CTX(pos, value) \
(context_put_ptr(CONTEXT_GLOBAL, current_processing_ctx, pos, value))
#define GET_GLOBAL_CTX(pos) \
(context_get_ptr(CONTEXT_GLOBAL, current_processing_ctx, pos))
static int mod_init(void);
static int child_init(int rank);
static void mod_destroy();
int mc_level = 6;
unsigned char* mnd_hdrs_mask = NULL;
unsigned char* compact_form_mask = NULL;
struct tm_binds tm_api;
int compress_ctx_pos, compact_ctx_pos;
int tm_compress_ctx_pos, tm_compact_ctx_pos;
static int sh_fixup(void**, int);
static int mc_compact_no_args(struct sip_msg*);
static int mc_compact(struct sip_msg*, char*);
static int mc_compact_cb(char** buf, void* param, int, int*);
static int mc_compress_fixup(void**, int);
static int mc_compress(struct sip_msg*, char*, char*, char*);
int mc_compress_cb(char** buf, void* param, int type, int* olen);
static inline int mc_ndigits(int x);
static inline void parse_algo_hdr(struct hdr_field* algo_hdr, int* algo, int* b64_required);
static int mc_decompress(struct sip_msg*);
void wrap_tm_func(struct cell* t, int type, struct tmcb_params* p);
int wrap_msg_func(str*, struct sip_msg*, int type);
static char body_buf[BUFLEN];
static char hdr_buf[BUFLEN/2];
struct cell* global_tran=NULL;
static str body_in = {NULL, 0},
body_out = {NULL, 0},
hdr_in = {NULL, 0},
hdr_out = {NULL, 0},
buf_out = {NULL, 0};
static param_export_t mod_params[]={
{ "compression_level", INT_PARAM, &mc_level},
{0,0,0}
};
static cmd_export_t cmds[]={
{"mc_compact", (cmd_function)mc_compact_no_args, 0, NULL,
0,
REQUEST_ROUTE|ONREPLY_ROUTE|LOCAL_ROUTE|FAILURE_ROUTE},
{"mc_compact", (cmd_function)mc_compact, 1, sh_fixup,
0,
REQUEST_ROUTE|ONREPLY_ROUTE|LOCAL_ROUTE|FAILURE_ROUTE},
{"mc_compress", (cmd_function)mc_compress, 3, mc_compress_fixup,
0,
REQUEST_ROUTE|ONREPLY_ROUTE|LOCAL_ROUTE|FAILURE_ROUTE},
{"mc_decompress", (cmd_function)mc_decompress, 0, NULL, 0,
REQUEST_ROUTE|LOCAL_ROUTE|FAILURE_ROUTE},
{"load_compression", (cmd_function)bind_compression, 1, 0, 0, 0},
{0,0,0,0,0,0}
};
struct module_exports exports= {
"compression", /* module's name */
MOD_TYPE_DEFAULT, /* class of this module */
MODULE_VERSION,
DEFAULT_DLFLAGS, /* dlopen flags */
NULL, /* module dependencies */
cmds, /* exported functions */
0, /* exported async functions */
mod_params, /* param exports */
0, /* exported statistics */
0, /* exported MI functions */
0, /* exported pseudo-variables */
0, /* exported transformations */
0, /* additional processes */
mod_init, /* module initialization function */
0, /* reply processing function */
mod_destroy,
child_init /* pre-child init function */
};
int mnd_hdrs[]={
HDR_VIA_T,
HDR_VIA2_T,
HDR_FROM_T,
HDR_TO_T,
HDR_CSEQ_T,
HDR_ROUTE_T,
HDR_RECORDROUTE_T,
HDR_CONTENTTYPE_T,
HDR_CALLID_T,
HDR_CONTACT_T
};
int compact_form_hdrs[]={
HDR_CALLID_T,
HDR_CONTACT_T,
HDR_CONTENTLENGTH_T,
HDR_CONTENTTYPE_T,
HDR_FROM_T,
HDR_SUBJECT_T,
HDR_TO_T,
HDR_VIA_T,
HDR_SUPPORTED_T,
HDR_SESSION_EXPIRES_T,
HDR_OTHER_T
};
/*
* Function that builds a list which will contain the mandatory headers
*/
int build_hdr_masks(void)
{
int len = veclen(mnd_hdrs, int), i;
mnd_hdrs_mask = pkg_malloc(HDR_MASK_SIZE);
if (!mnd_hdrs_mask)
goto mem;
memset(mnd_hdrs_mask, 0, HDR_MASK_SIZE);
/* build initial array with mandatory headers mask */
for (i = 0; i < len; i++) {
mnd_hdrs_mask[mnd_hdrs[i] / MC_BYTE_SIZE] |=
(unsigned char)1 << (mnd_hdrs[i] % MC_BYTE_SIZE);
}
compact_form_mask = pkg_malloc(HDR_MASK_SIZE);
if (!compact_form_mask)
goto mem;
memset(compact_form_mask, 0, HDR_MASK_SIZE);
len = veclen(compact_form_hdrs, int);
/* Build mask with headers which will be reduced to short form */
for (i = 0; i < len; i++) {
compact_form_mask[compact_form_hdrs[i] / MC_BYTE_SIZE] |=
(unsigned char)1 << (compact_form_hdrs[i] % MC_BYTE_SIZE);
}
return 0;
mem:
LM_ERR("no more pkg mem\n");
return -1;
}
void wrap_tm_compress(struct cell* t, int type, struct tmcb_params* p)
{
wrap_tm_func( t, COMPRESS_CB, p);
}
void wrap_tm_compact(struct cell*t, int type, struct tmcb_params* p)
{
wrap_tm_func( t, COMPACT_CB, p);
}
void wrap_tm_func(struct cell* t, int type, struct tmcb_params* p)
{
char* buf = t->uac[p->code].request.buffer.s;
int olen = t->uac[p->code].request.buffer.len;
void* args;
switch (type) {
case COMPRESS_CB:
if ((args = GET_GLOBAL_CTX(compress_ctx_pos)) == NULL)
break;
if (mc_compress_cb(&buf, args, TM_CB, &olen) < 0) {
LM_ERR("compression failed\n");
return;
}
pkg_free(args);
SET_GLOBAL_CTX(compress_ctx_pos, NULL);
break;
case COMPACT_CB:
/* if not registered yet we take from global context */
if ((args = GET_GLOBAL_CTX(compact_ctx_pos)) == NULL)
break;
if (mc_compact_cb(&buf, args, TM_CB, &olen) < 0) {
LM_ERR("compaction failed\n");
return;
}
pkg_free(args);
SET_GLOBAL_CTX(compact_ctx_pos, NULL);
break;
default:
LM_BUG("!!! invalid CB type arg!\n");
return;
}
t->uac[p->code].request.buffer.s = buf;
t->uac[p->code].request.buffer.len = olen;
/* we also need to compute the uri so that it points within the new buffer */
t->uac[p->code].uri.s = buf + t->method.len + 1;
/* uri.len should be the same, since it is not changed by compression */
}
int wrap_msg_compress(str* buf, struct sip_msg* p_msg) {
return wrap_msg_func( buf, p_msg, COMPRESS_CB);
}
int wrap_msg_compact(str* buf, struct sip_msg* p_msg) {
return wrap_msg_func( buf, p_msg, COMPACT_CB);
}
int wrap_msg_func(str* buf, struct sip_msg* p_msg, int type)
{
void* args;
int olen=buf->len;
if (current_processing_ctx == NULL) {
LM_DBG("null context. cb shall not be removed\n");
return 1;
}
switch (type) {
case COMPRESS_CB:
if ((args = GET_GLOBAL_CTX(compress_ctx_pos))==NULL)
break;
if (mc_compress_cb(&buf->s, args, PROCESSING_CB, &olen) < 0) {
LM_ERR("compression failed. Probably not requested message\n");
return -1;
}
pkg_free(args);
SET_GLOBAL_CTX(compress_ctx_pos, NULL);
break;
case COMPACT_CB:
if ((args = GET_GLOBAL_CTX(compact_ctx_pos))==NULL)
break;
if (mc_compact_cb(&buf->s, args, PROCESSING_CB, &olen) < 0) {
LM_ERR("compaction failed\n");
return -1;
}
pkg_free(args);
SET_GLOBAL_CTX(compact_ctx_pos, NULL);
break;
}
buf->len = olen;
return 0;
}
/*
*
*/
static int mod_init(void)
{
LM_INFO("Initializing module...\n");
if (build_hdr_masks()) {
LM_ERR("Cannot build initial mandatory headers mask\n");
return -1;
}
if (mc_level > 9 || mc_level < 1) {
LM_WARN("invalid level. using default 6\n");
mc_level = 6;
}
compress_ctx_pos = context_register_ptr(CONTEXT_GLOBAL, NULL);
LM_DBG("received compress context position %d\n", compress_ctx_pos);
compact_ctx_pos = context_register_ptr(CONTEXT_GLOBAL, NULL);
LM_DBG("received compact context position %d\n", compact_ctx_pos);
memset(&tm_api, 0, sizeof(struct tm_binds));
if (load_tm_api(&tm_api) != 0)
LM_DBG("TM modules was not found\n");
return 0;
}
/*
*
*/
static int child_init(int rank)
{
return 0;
}
/*
*
*/
static void mod_destroy(void)
{
return;
}
/*
* Function that gets the whitelist in the param given
*/
static int set_wh_param(void **param, unsigned char* def_hdrs_mask)
{
mc_param_p wh_param;
wh_param = pkg_malloc(sizeof(mc_param_t));
if (!wh_param) {
LM_ERR("no more pkg mem\n");
return -1;
}
if (((char*)*param)[0] != PV_MARKER) {
wh_param->type = WH_TYPE_STR;
if (parse_whitelist(param, &wh_param->v.lst, def_hdrs_mask)) {
LM_ERR("cannot parse whitelist\n");
return -1;
}
} else {
if (fixup_pvar(param)) {
LM_ERR("parsing pvar whitelist failed\n");
return -1;
}
wh_param->type = WH_TYPE_PVS;
wh_param->v.pvs = *param;
}
*param = (void*)wh_param;
return 0;
}
/*
* Fixup function for 'mc_compact'
*/
static int sh_fixup(void** param, int param_no)
{
if (param_no == 1)
return set_wh_param(param, mnd_hdrs_mask);
else {
LM_ERR("invalid param no\n");
return -1;
}
}
/*
* Memcpy and update length wrapper
*/
static inline int wrap_copy_and_update(char** dest_p, const char* src, int cpy_len,
int* dest_len)
{
memcpy(*dest_p + *dest_len, src, cpy_len);
*dest_len += cpy_len;
return 0;
}
/*
* Function that jumps over the first row of the message
* with the received buffer and saves a pointer in the first
* arg to the first row along with the length
*/
static int mc_parse_first_line(str* msg_start, char** buffer)
{
char* buf = *buffer;
int len=0;
msg_start->s = buf;
msg_start->len = 0;
/* Jump over initial row of the message */
do {
len++;
} while (*(buf+len) != '\n');
len++;
msg_start->len = len;
*buffer = buf+len;
return 0;
}
/*
*Function that checks if header is in whitelist
*/
static int mc_is_in_whitelist(struct hdr_field* hf, mc_whitelist_p wh_list)
{
if (hf->type != HDR_OTHER_T) {
return ((1 << (hf->type%MC_BYTE_SIZE))&
(wh_list->hdr_mask[hf->type/MC_BYTE_SIZE]));
} else {
mc_other_hdr_lst_p other_hdr = wh_list->other_hdr;
for ( ; other_hdr; other_hdr=other_hdr->next) {
if (other_hdr->hdr_name.len != hf->name.len)
continue;
if (strncasecmp(hf->name.s, other_hdr->hdr_name.s,
hf->name.len))
continue;
return 1;
}
return 0;
}
return 0;
}
/*
* Append header to hdr_mask elemnt
*/
static int append_hf2lst(struct hdr_field** lst, struct hdr_field* hf,
int* msg_total_len)
{
struct hdr_field* temp = *lst;
if (hf->type != HDR_OTHER_T) {
while (temp->sibling)
temp = temp->sibling;
temp->sibling = hf;
*msg_total_len += hf->body.len + ATTR_DELIM_LEN;
} else {
/* OTHER hdr type */
while (temp) {
/* Header already exists */
if (!strncasecmp(temp->name.s, hf->name.s,
temp->name.len)) {
while (temp->sibling)
temp = temp->sibling;
temp->sibling = hf;
*msg_total_len += hf->body.len + ATTR_DELIM_LEN;
return 0;
}
if (!temp->next)
break;
temp = temp->next;
}
/* First occurence of this header */
temp->next = hf;
*msg_total_len += hf->name.len + DELIM_LEN;
*msg_total_len += hf->body.len + CRLF_LEN;
}
return 0;
}
/*
* wrapper for mc_compact with zero arguments
*/
static int mc_compact_no_args(struct sip_msg* msg)
{
return mc_compact(msg, NULL);
}
/*
* Compaction function
* 1) Headers of same type will be put together
* 2) Header names with compact forms will be transformed to
* compact form
* 3) Headers which not in whitelist will be removed
* 4) Unnecessary sdp body codec attributes lower than 98 removed
*/
static int mc_compact(struct sip_msg* msg, char* whitelist)
{
mc_whitelist_p wh_list;
struct mc_cmpct_args* args;
mc_param_p wh_param = (mc_param_p)whitelist;
/* first check if anyone else has called mc_compact() on this msg */
if (GET_GLOBAL_CTX(compact_ctx_pos))
return 1;
if (mc_get_whitelist(msg, &wh_param, &wh_list, mnd_hdrs_mask)) {
LM_ERR("Cannot get whitelist\n");
return -1;
}
/* args shall be created only if global contexts do not exist and
* tm is not present or tm context is empty */
args=pkg_malloc(sizeof(struct mc_cmpct_args));
if (args==NULL) {
LM_ERR("no more pkg mem\n");
goto err00;
}
args->wh_param = wh_param;
args->wh_list = wh_list;
SET_GLOBAL_CTX(compact_ctx_pos, (void*)args);
/* register stateless callbacks */
if (register_post_raw_processing_cb(wrap_msg_compact, POST_RAW_PROCESSING, 1/*to be freed*/) < 0) {
LM_ERR("failed to add raw processing cb\n");
goto err00;
}
if (tm_api.t_gett && msg->flags&FL_TM_CB_REGISTERED)
return 1;
/*register tm callback if tm api */
if (tm_api.register_tmcb &&
tm_api.register_tmcb( msg, 0, TMCB_PRE_SEND_BUFFER,
wrap_tm_compact, NULL, 0) != 1) {
LM_ERR("failed to add tm TMCB_PRE_SEND_BUFFER callback\n");
msg->flags |= FL_TM_CB_REGISTERED;
goto err00;
}
return 1;
err00:
if (wh_param) {
if (wh_param->type == WH_TYPE_PVS)
free_whitelist(&wh_list);
} else
pkg_free(wh_list);
return -1;
}
/*
*
*/
static int mc_compact_cb(char** buf_p, void* param, int type, int* olen)
{
int i;
int msg_total_len;
int rtpmap_val=0, rtpmap_len;
int new_body_len;
int hdr_len;
str msg_start;
str new_buf;
char *buf=*buf_p;
char *buf_cpy;
char *end=buf+*olen;
struct hdr_field *hf;
struct hdr_field** hdr_mask;
struct mc_cmpct_args* args;
body_frag_p frg;
body_frag_p frg_head;
body_frag_p temp;
mc_param_p wh_param;
mc_whitelist_p wh_list;
args = (struct mc_cmpct_args*)param;
wh_param = args->wh_param;
wh_list = args->wh_list;
hdr_mask = pkg_malloc(HDR_EOH_T * sizeof(struct hdr_field*));
if (!hdr_mask)
goto memerr;
memset(hdr_mask, 0, HDR_EOH_T * sizeof(struct hdr_field*));
mc_parse_first_line( &msg_start, &buf);
msg_total_len = msg_start.len;
/* Start to parse the headers and print them*/
while (1) {
hf = pkg_malloc(sizeof(struct hdr_field));
if (hf == NULL) {
LM_ERR("no more pkg mem\n");
goto memerr;
}
memset(hf, 0, sizeof(struct hdr_field));
hf->type=HDR_ERROR_T;
buf=get_hdr_field(buf, end, hf);
if (hf->type == HDR_ERROR_T) {
pkg_free(hf);
goto free_mem;
}
if (hf->type == HDR_EOH_T) {
pkg_free(hf);
break;
}
if (mc_is_in_whitelist(hf, wh_list)) {
if (hdr_mask[hf->type]) {
/* If hdr already found or hdr of type other */
if (append_hf2lst(&hdr_mask[hf->type], hf,
&msg_total_len)) {
LM_ERR("Cannot append hdr to lst\n");
clean_hdr_field(hf);
pkg_free(hf);
goto free_mem;
}
} else {
unsigned char c;
/* Get the compact form of the header */
if (hf->type != HDR_OTHER_T &&
(c=get_compact_form(hf)) != NO_FORM) {
hf->name.s = &COMPACT_FORMS[c];
hf->name.len = 1;
}
/* update the len of the new buffer */
msg_total_len += hf->name.len + DELIM_LEN;
msg_total_len += hf->body.len + CRLF_LEN;
hdr_mask[hf->type] = hf;
}
} else {
clean_hdr_field(hf);
pkg_free(hf);
}
hf = 0;
}
hdr_len = msg_total_len + CRLF_LEN/* sip headers end with 2 * CRLF */;
buf_cpy = buf+CRLF_LEN;
frg = frg_head = pkg_malloc(sizeof(body_frag_t));
if (!frg)
goto memerr;
frg->begin = 0;
frg->end = CRLF_LEN;
frg->next = NULL;
/* parse the body and extract fragments */
while (buf_cpy != end) {
while (*buf_cpy == ' ' || *buf_cpy == '\t')
(buf_cpy++, frg->end++);
if (*buf_cpy != 'a') {
/* Jump over the entire row*/
goto row_jump;
}
else if (strncmp(buf_cpy, "a=rtpmap:", 9))
goto row_jump;
/* found rtpmap */
else {
buf_cpy += 9;
frg->end--; /* already on 'a' char */
rtpmap_len = rtpmap_val = 0;
while (*buf_cpy >= '0' && *buf_cpy <= '9') {
rtpmap_val = rtpmap_val*10 + (*buf_cpy - '0');
(buf_cpy++, rtpmap_len++);
}
if (rtpmap_val < 98) {
msg_total_len += frg->end - frg->begin + 1;
frg->next = pkg_malloc(sizeof(body_frag_t));
if (!frg->next)
goto memerr;
frg = frg->next;
frg->next = NULL;
/* find the next line and set the start of the next fragment */
while (*buf_cpy != '\n') buf_cpy++;
buf_cpy++;
frg->end = frg->begin = buf_cpy - buf;
continue;
} else {
/*currently on \n before rtpmap. Need to jump over \nrtpmap:RT_VAL */
frg->end += 9 + rtpmap_len + 1;
}
}
row_jump:
while (*buf_cpy != '\n') {
if (*buf_cpy == '\0') {
LM_ERR("BUG! Message body not containing '\\n' in the end\n");
return -1;
}
(buf_cpy++, frg->end++);
}
(buf_cpy++, frg->end++);
}
int foo;
/* not storing '\0' at the end of the message */
(buf_cpy--, frg->end--);
msg_total_len += frg->end - frg->begin + 1;
new_body_len = msg_total_len - hdr_len;
/* creating the new content length */
hf = pkg_malloc(sizeof(struct hdr_field));
if (hf == NULL)
goto memerr;
memset(hf, 0, sizeof(struct hdr_field));
hf->type = HDR_CONTENTLENGTH_T;
hf->name.s = &COMPACT_FORMS[get_compact_form(hf)];
hf->name.len = 1;
if (new_body_len <= CRLF_LEN)
new_body_len = 0;
hf->body.len = mc_ndigits(new_body_len);
hf->body.s = int2str( new_body_len, &foo);
if (hf->body.s == 0) {
LM_ERR("failed to convert int to string\n");
goto memerr;
}
/*
* If body is empty Content-Type is not necessary anymore
* But only if Content-Type exists
*/
if (hdr_mask[HDR_CONTENTTYPE_T] && new_body_len == 0) {
clean_hdr_field(hdr_mask[HDR_CONTENTTYPE_T]);
hdr_mask[HDR_CONTENTTYPE_T] = NULL;
}
msg_total_len += hf->name.len + DELIM_LEN + hf->body.len + CRLF_LEN;
hdr_mask[hf->type] = hf;
/* build the new buffer */
if (wrap_realloc(&buf_out, msg_total_len))
goto free_mem;
new_buf.s = buf_out.s;
new_buf.len = 0;
/* Copy the beginning of the message */
wrap_copy_and_update( &new_buf.s, msg_start.s, msg_start.len,
&new_buf.len);
/* Copy all the headers */
for (i = HDR_VIA_T; i <= HDR_EOH_T; i++) {
/* Just to put headers of type other after
all the other headers */
if (i == HDR_EOH_T)
i = HDR_OTHER_T;
again:
if (hdr_mask[i]) {
/* Compact form name so the header have
to be built */
if (LOWER_CASE(hdr_mask[i]->name.s)) {
/* Copy the name of the header */
wrap_copy_and_update(&new_buf.s,
hdr_mask[i]->name.s,
hdr_mask[i]->name.len, &new_buf.len);
/* Copy the ': ' delimiter*/
wrap_copy_and_update(&new_buf.s, DELIM,
DELIM_LEN, &new_buf.len);
/* Copy the first field of the header*/
wrap_copy_and_update(&new_buf.s,
hdr_mask[i]->body.s,
hdr_mask[i]->body.len, &new_buf.len);
/* Normal form header so it can be copied in one step */
} else {
wrap_copy_and_update(
&new_buf.s,
hdr_mask[i]->name.s,
/* Possible siblings. No CRLF yet */
hdr_mask[i]->len - CRLF_LEN,
&new_buf.len
);
}
/* Copy the rest of the header fields(siblings)
if they exist */
struct hdr_field* temp = hdr_mask[i]->sibling,
*hdr_field;
while (temp) {
/* Put ', ' delimiter before header body*/
wrap_copy_and_update(&new_buf.s, ATTR_DELIM,
ATTR_DELIM_LEN, &new_buf.len);
/* Append the header content */
wrap_copy_and_update(&new_buf.s, temp->body.s,
temp->body.len, &new_buf.len);
hdr_field = temp->sibling;
clean_hdr_field(temp);
pkg_free(temp);
temp = hdr_field;
}
/* Copy CRLF to the end of the header */
wrap_copy_and_update(&new_buf.s, CRLF, CRLF_LEN,
&new_buf.len);
if (hdr_mask[i]->next) {
/* XXX: is this really getting here?! */
/* If more other headers, put all of them in
the new buffer and free every allocated
member */
temp = hdr_mask[i];
hdr_mask[i] = hdr_mask[i]->next;
clean_hdr_field(temp);
pkg_free(temp);
goto again;
} else {
clean_hdr_field(hdr_mask[i]);
/* if it is not an OTHER_HDR or it is the last
one in OTHER_HDR list */
pkg_free(hdr_mask[i]);
hdr_mask[i] = 0;
}
}
if (i == HDR_OTHER_T)
break;
}
/* Copy the body of the message */
frg = frg_head;
while (frg) {
temp = frg;
wrap_copy_and_update( &new_buf.s, buf + frg->begin,
frg->end-frg->begin+1, &new_buf.len);
frg = frg->next;
pkg_free(temp);
}
switch (type) {
case TM_CB:
shm_free(*buf_p);
*buf_p = shm_malloc(new_buf.len);
if (*buf_p == NULL) {
LM_ERR("no more sh mem\n");
goto free_mem;
}
break;
case PROCESSING_CB:
*buf_p = pkg_malloc(new_buf.len);
if (*buf_p == NULL) {
LM_ERR("no more pkg mem\n");
goto free_mem;
}
break;
default:
LM_ERR("invalid type\n");
goto free_mem;
}
memcpy(*buf_p, new_buf.s, new_buf.len);
*olen = new_buf.len;
/* Free the vector */
pkg_free(hdr_mask);
/* Free the whitelist if pvs */
if (wh_param) {
if (wh_param->type == WH_TYPE_PVS)
free_whitelist(&wh_list);
} else
pkg_free(wh_list);
return 0;
memerr:
LM_ERR("No more pkg mem\n");
free_mem:
free_hdr_mask(hdr_mask);
if (wh_param) {
if (wh_param->type == WH_TYPE_PVS)
free_whitelist(&wh_list);
} else
pkg_free(wh_list);
return -1;
}
/*
* Fixup function for mc_compress
*/
static int mc_compress_fixup(void** param, int param_no)
{
switch (param_no) {
case 1:
if (fixup_igp(param)) {
LM_ERR("invalid algo\n");