前言

libosip2-4.1.0升级到libosip2-5.30

修改代码

sdp_message_parse_m

旧版本

static int
sdp_message_parse_m (sdp_message_t * sdp, char *buf, char **next)
{
  char *equal;
  char *crlf;
  char *tmp;
  char *tmp_next;
  int i;
  sdp_media_t *m_header;
  char *slash;
  char *space;

  *next = buf;

  equal = buf;
  while ((*equal != '=') && (*equal != '\0'))
    equal++;
  if (*equal == '\0')
    return ERR_ERROR;

  /* check if header is "m" */
  if (equal[-1] != 'm')
    return ERR_DISCARD;

新版本

static int sdp_message_parse_m(sdp_message_t *sdp, char *buf, char **next) {
  char *equal;
  char *crlf;
  char *tmp;
  char *tmp_next;
  int i;
  sdp_media_t *m_header;
  char *slash;
  char *space;

  *next = buf;

  equal = buf;

  while ((*equal != '=') && (*equal != '\0'))
    equal++;

  if (*equal == '\0')
    return ERR_ERROR;

  /* check if header is "m" */
  if (equal[-1] != 'm')
    return ERR_ERROR; /* fixed Jan 10,2020: avoid a possible memory leak with m being not detected */

区别

if (equal[-1] != 'm')应该返回ERR_ERROR（-1）还是ERR_DISCARD（0）

实际上如果出现f=参数，不应该返回-1，而应该返回0，旧版本才是正确的返回方式，因此多余的f=参数

eXosip_call_send_ack_to_peer

修改为

eXosip_call_send_ack

eXosip_call_terminate_to_peer

修改为

eXosip_call_terminate

订阅函数

旧版本

eXosip_subscribe_build_initial_request

新版本

eXoisp_subscription_build_initial_subscribe

自动订阅和定时发送注册信息

旧版本

eXosip_automatic_refresh    

新版本

eXoisp_auomatic_action