/*
* Parse SDP message.
*/
PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool,
char *buf, pj_size_t len,
pjmedia_sdp_session **p_sdp)
{
pj_scanner scanner;
pjmedia_sdp_session *session;
pjmedia_sdp_media *media = NULL;
void *attr;
pjmedia_sdp_conn *conn;
pj_str_t dummy;
int cur_name = 254;
parse_context ctx;
PJ_USE_EXCEPTION;
ctx.last_error = PJ_SUCCESS;
init_sdp_parser();
pj_scan_init(&scanner, buf, len, 0, &on_scanner_error);
session = pj_pool_calloc(pool, 1, sizeof(pjmedia_sdp_session));
PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM);
PJ_TRY {
while (!pj_scan_is_eof(&scanner)) {
cur_name = *scanner.curptr;
switch (cur_name) {
case 'a':
attr = parse_attr(pool, &scanner, &ctx);
if (attr) {
if (media) {
media->attr[media->attr_count++] = attr;
} else {
session->attr[session->attr_count++] = attr;
}
}
break;
case 'o':
parse_origin(&scanner, session, &ctx);
break;
case 's':
parse_generic_line(&scanner, &session->name, &ctx);
break;
case 'c':
conn = pj_pool_calloc(pool, 1, sizeof(*conn));
parse_connection_info(&scanner, conn, &ctx);
if (media) {
media->conn = conn;
} else {
session->conn = conn;
}
break;
case 't':
parse_time(&scanner, session, &ctx);
break;
case 'm':
media = pj_pool_calloc(pool, 1, sizeof(*media));
parse_media(&scanner, media, &ctx);
session->media[ session->media_count++ ] = media;
break;
case 'v':
parse_version(&scanner, &ctx);
break;
case 13:
/* Allow empty newline at the end of the message */
pj_scan_get_char(&scanner);
/* Continue below */
case 10:
pj_scan_get_char(&scanner);
if (!pj_scan_is_eof(&scanner)) {
on_scanner_error(&scanner);
}
break;
default:
if (cur_name >= 'a' && cur_name <= 'z')
parse_generic_line(&scanner, &dummy, &ctx);
else {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
break;
}
}
ctx.last_error = PJ_SUCCESS;
}
PJ_CATCH(SYNTAX_ERROR) {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(ctx.last_error, errmsg, sizeof(errmsg));
PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s",
scanner.line, pj_scan_get_col(&scanner),
errmsg));
session = NULL;
pj_assert(ctx.last_error != PJ_SUCCESS);
}
PJ_END;
pj_scan_fini(&scanner);
*p_sdp = session;
return ctx.last_error;
}
/*
* Parse SDP message.
*/
PJ_DEF(pj_status_t) pjmedia_sdp_parse( pj_pool_t *pool,
char *buf, pj_size_t len,
pjmedia_sdp_session **p_sdp)
{
pj_scanner scanner;
pjmedia_sdp_session *session;
pjmedia_sdp_media *media = NULL;
pjmedia_sdp_attr *attr;
pjmedia_sdp_conn *conn;
pjmedia_sdp_bandw *bandw;
pj_str_t dummy;
int cur_name = 254;
parse_context ctx;
PJ_USE_EXCEPTION;
ctx.last_error = PJ_SUCCESS;
init_sdp_parser();
pj_scan_init(&scanner, buf, len, 0, &on_scanner_error);
session = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_session);
PJ_ASSERT_RETURN(session != NULL, PJ_ENOMEM);
/* Ignore leading newlines */
while (*scanner.curptr=='\r' || *scanner.curptr=='\n')
pj_scan_get_char(&scanner);
PJ_TRY {
while (!pj_scan_is_eof(&scanner)) {
cur_name = *scanner.curptr;
switch (cur_name) {
case 'a':
attr = parse_attr(pool, &scanner, &ctx);
if (attr) {
if (media) {
if (media->attr_count < PJMEDIA_MAX_SDP_ATTR)
pjmedia_sdp_media_add_attr(media, attr);
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding media attribute, "
"attribute is ignored"));
} else {
if (session->attr_count < PJMEDIA_MAX_SDP_ATTR)
pjmedia_sdp_session_add_attr(session, attr);
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding session attribute"
", attribute is ignored"));
}
}
break;
case 'o':
parse_origin(&scanner, session, &ctx);
break;
case 's':
parse_generic_line(&scanner, &session->name, &ctx);
break;
case 'c':
conn = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_conn);
parse_connection_info(&scanner, conn, &ctx);
if (media) {
media->conn = conn;
} else {
session->conn = conn;
}
break;
case 't':
parse_time(&scanner, session, &ctx);
break;
case 'm':
media = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_media);
parse_media(&scanner, media, &ctx);
if (session->media_count < PJMEDIA_MAX_SDP_MEDIA)
session->media[ session->media_count++ ] = media;
else
PJ_PERROR(2,(THIS_FILE, PJ_ETOOMANY,
"Error adding media, media is ignored"));
break;
case 'v':
parse_version(&scanner, &ctx);
break;
case 13:
case 10:
pj_scan_get_char(&scanner);
/* Allow empty newlines at the end of the message */
while (!pj_scan_is_eof(&scanner)) {
if (*scanner.curptr != 13 && *scanner.curptr != 10) {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
pj_scan_get_char(&scanner);
}
break;
case 'b':
bandw = PJ_POOL_ZALLOC_T(pool, pjmedia_sdp_bandw);
parse_bandwidth_info(&scanner, bandw, &ctx);
if (media) {
if (media->bandw_count < PJMEDIA_MAX_SDP_BANDW)
media->bandw[media->bandw_count++] = bandw;
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding media bandwidth "
"info, info is ignored"));
} else {
if (session->bandw_count < PJMEDIA_MAX_SDP_BANDW)
session->bandw[session->bandw_count++] = bandw;
else
PJ_PERROR(2, (THIS_FILE, PJ_ETOOMANY,
"Error adding session bandwidth "
"info, info is ignored"));
}
break;
default:
if (cur_name >= 'a' && cur_name <= 'z')
parse_generic_line(&scanner, &dummy, &ctx);
else {
ctx.last_error = PJMEDIA_SDP_EINSDP;
on_scanner_error(&scanner);
}
break;
}
}
ctx.last_error = PJ_SUCCESS;
}
PJ_CATCH_ANY {
char errmsg[PJ_ERR_MSG_SIZE];
pj_strerror(ctx.last_error, errmsg, sizeof(errmsg));
PJ_LOG(4, (THIS_FILE, "Error parsing SDP in line %d col %d: %s",
scanner.line, pj_scan_get_col(&scanner),
errmsg));
session = NULL;
pj_assert(ctx.last_error != PJ_SUCCESS);
}
PJ_END;
pj_scan_fini(&scanner);
if (session)
apply_media_direction(session);
*p_sdp = session;
return ctx.last_error;
}
int sdp_parse(str *body, GQueue *sessions) {
char *b, *end, *value, *line_end, *next_line;
struct sdp_session *session = NULL;
struct sdp_media *media = NULL;
const char *errstr;
struct sdp_attributes *attrs;
struct sdp_attribute *attr;
str *adj_s;
GQueue *attr_queue;
b = body->s;
end = str_end(body);
while (b && b < end - 1) {
#ifdef TERMINATE_SDP_AT_BLANK_LINE
if (b[0] == '\n' || b[0] == '\r') {
body->len = b - body->s;
break;
}
#endif
errstr = "Missing '=' sign";
if (b[1] != '=')
goto error;
value = &b[2];
line_end = memchr(value, '\n', end - value);
if (!line_end) {
/* assume missing LF at end of body */
line_end = end;
next_line = NULL;
}
else {
next_line = line_end + 1;
if (line_end[-1] == '\r')
line_end--;
}
switch (b[0]) {
case 'v':
errstr = "Error in v= line";
if (line_end != value + 1)
goto error;
if (value[0] != '0')
goto error;
session = g_slice_alloc0(sizeof(*session));
g_queue_init(&session->media_streams);
attrs_init(&session->attributes);
g_queue_push_tail(sessions, session);
media = NULL;
session->s.s = b;
session->rr = session->rs = -1;
break;
case 'o':
errstr = "o= line found within media section";
if (media)
goto error;
errstr = "Error parsing o= line";
if (parse_origin(value, line_end, &session->origin))
goto error;
break;
case 'm':
media = g_slice_alloc0(sizeof(*media));
media->session = session;
attrs_init(&media->attributes);
errstr = "Error parsing m= line";
if (parse_media(value, line_end, media))
goto error;
g_queue_push_tail(&session->media_streams, media);
media->s.s = b;
media->rr = media->rs = -1;
break;
case 'c':
errstr = "Error parsing c= line";
if (parse_connection(value, line_end,
media ? &media->connection : &session->connection))
goto error;
break;
case 'a':
attr = g_slice_alloc0(sizeof(*attr));
attr->full_line.s = b;
attr->full_line.len = next_line ? (next_line - b) : (line_end - b);
attr->line_value.s = value;
attr->line_value.len = line_end - value;
if (parse_attribute(attr)) {
g_slice_free1(sizeof(*attr), attr);
break;
}
attrs = media ? &media->attributes : &session->attributes;
g_queue_push_tail(&attrs->list, attr);
/* g_hash_table_insert(attrs->name_hash, &attr->name, attr); */
if (!g_hash_table_lookup(attrs->id_hash, &attr->attr))
g_hash_table_insert(attrs->id_hash, &attr->attr, attr);
/* if (attr->key.s)
g_hash_table_insert(attrs->name_hash, &attr->key, attr); */
/* attr_queue = g_hash_table_lookup(attrs->name_lists_hash, &attr->name);
if (!attr_queue)
g_hash_table_insert(attrs->name_lists_hash, &attr->name,
(attr_queue = g_queue_new()));
g_queue_push_tail(attr_queue, attr); */
attr_queue = g_hash_table_lookup(attrs->id_lists_hash, &attr->attr);
if (!attr_queue)
g_hash_table_insert(attrs->id_lists_hash, &attr->attr,
(attr_queue = g_queue_new()));
g_queue_push_tail(attr_queue, attr);
break;
case 'b':
/* RR:0 */
if (line_end - value < 4)
break;
if (!memcmp(value, "RR:", 3))
*(media ? &media->rr : &session->rr) =
(line_end - value == 4 && value[3] == '0') ? 0 : 1;
else if (!memcmp(value, "RS:", 3))
*(media ? &media->rs : &session->rs) =
(line_end - value == 4 && value[3] == '0') ? 0 : 1;
break;
case 's':
case 'i':
case 'u':
case 'e':
case 'p':
case 't':
case 'r':
case 'z':
case 'k':
break;
default:
errstr = "Unknown SDP line type found";
goto error;
}
errstr = "SDP doesn't start with a session definition";
if (!session)
goto error;
adj_s = media ? &media->s : &session->s;
adj_s->len = (next_line ? : end) - adj_s->s;
b = next_line;
}
return 0;
error:
ilog(LOG_WARNING, "Error parsing SDP at offset %li: %s", (long) (b - body->s), errstr);
sdp_free(sessions);
return -1;
}
int main(int argc, char **argv)
{
int i, c, ret, errflag = 0;
char s[6];
while ((c = getopt_long(argc, argv, "A:F:p:lrRvVw?", longopts, 0)) != EOF)
switch (c) {
case 'A': nway_advertise = parse_media(optarg); break;
case 'F': fixed_speed = parse_media(optarg); break;
case 'p': override_phy = atoi(optarg); break;
case 'r': opt_restart++; break;
case 'R': opt_reset++; break;
case 'v': verbose++; break;
case 'V': opt_version++; break;
case 'w': opt_watch++; break;
case 'l': opt_log++; break;
case '?': errflag++;
}
/* Check for a few inappropriate option combinations */
if (opt_watch) verbose = 0;
if (errflag || (fixed_speed & (fixed_speed-1)) ||
(fixed_speed && (opt_restart || nway_advertise))) {
fprintf(stderr, usage, argv[0]);
return 2;
}
if (opt_version)
printf(version);
/* Open a basic socket. */
if ((skfd = socket(AF_INET, SOCK_DGRAM,0)) < 0) {
perror("socket");
exit(-1);
}
/* No remaining args means show all interfaces. */
if (optind == argc) {
ret = 1;
for (i = 0; i < MAX_ETH; i++) {
sprintf(s, "eth%d", i);
ret &= do_one_xcvr(skfd, s, 1);
}
if (ret)
fprintf(stderr, "no MII interfaces found\n");
} else {
ret = 0;
for (i = optind; i < argc; i++) {
ret |= do_one_xcvr(skfd, argv[i], 0);
}
}
if (opt_watch && (ret == 0)) {
while (1) {
sleep(1);
if (optind == argc) {
for (i = 0; i < MAX_ETH; i++) {
sprintf(s, "eth%d", i);
watch_one_xcvr(skfd, s, i);
}
} else {
for (i = optind; i < argc; i++)
watch_one_xcvr(skfd, argv[i], i-optind);
}
}
}
close(skfd);
return ret;
}
