Neels Hofmeyr has uploaded this change for review. (
https://gerrit.osmocom.org/10679
Change subject: cosmetic: mgcp_test: fix get_conn_id_from_response()
......................................................................
cosmetic: mgcp_test: fix get_conn_id_from_response()
This function is implemented in such a weird way that I couldn't stop myself
from rewriting it.
Change-Id: Ib9b13d7b0e64f8ae25a7b69cbb385e7fad33d02b
---
M tests/mgcp/mgcp_test.c
1 file changed, 30 insertions(+), 35 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-mgw refs/changes/79/10679/1
diff --git a/tests/mgcp/mgcp_test.c b/tests/mgcp/mgcp_test.c
index ea66069..a26acf9 100644
--- a/tests/mgcp/mgcp_test.c
+++ b/tests/mgcp/mgcp_test.c
@@ -600,47 +600,42 @@
MGCP_CONN_RECV_SEND);
}
-/* Extract a connection ID from a response (CRCX) */
+/* Extract a connection ID from a response and return in conn_id;
+ * if there is none, return -EINVAL and leave conn_id unchanged. */
static int get_conn_id_from_response(uint8_t *resp, char *conn_id,
- unsigned int conn_id_len)
+ size_t conn_id_buflen)
{
- char *conn_id_ptr;
- int i;
- bool got_conn_id = false;
+ const char *conn_id_start;
+ const char *conn_id_end;
+ int conn_id_len;
- /* First try to get the conn_id from the I: parameter */
- conn_id_ptr = strstr((char *)resp, "I: ");
- if (conn_id_ptr) {
- memset(conn_id, 0, conn_id_len);
- memcpy(conn_id, conn_id_ptr + 3, 32);
- got_conn_id = true;
- } else {
- /* Alternatively try to extract the conn_id from the o=- SDP
- * parameter */
- conn_id_ptr = strstr((char *)resp, "o=- ");
- if(conn_id_ptr) {
- memset(conn_id, 0, conn_id_len);
- memcpy(conn_id, conn_id_ptr + 4, 32);
- got_conn_id = true;
- }
- }
+ const char *header_I = "\r\nI: ";
+ const char *header_o = "\r\no=- ";
- if (got_conn_id) {
- for (i = 0; i < conn_id_len; i++) {
- if (!isxdigit(conn_id[i])) {
- conn_id[i] = '\0';
- break;
- }
- }
+ /* Try to get the conn_id from the 'I:' or 'o=-' parameter */
+ if ((conn_id_start = strstr((char *)resp, header_I))) {
+ conn_id_start += strlen(header_I);
+ conn_id_end = strstr(conn_id_start, "\r\n");
+ } else if ((conn_id_start = strstr((char *)resp, header_o))) {
+ conn_id_start += strlen(header_o);
+ conn_id_end = strchr(conn_id_start, ' ');
+ } else
+ return -EINVAL;
- /* A valid conn_id must at least contain one digit, and must
- * not exceed a length of 32 digits */
- OSMO_ASSERT(strlen(conn_id) <= 32);
- OSMO_ASSERT(strlen(conn_id) > 0);
+ if (conn_id_end)
+ conn_id_len = conn_id_end - conn_id_start;
+ else
+ conn_id_len = strlen(conn_id_start);
+ OSMO_ASSERT(conn_id_len <= conn_id_buflen - 1);
- return 0;
- }
- return -EINVAL;
+ /* A valid conn_id must at least contain one digit, and must
+ * not exceed a length of 32 digits */
+ OSMO_ASSERT(conn_id_len <= 32);
+ OSMO_ASSERT(conn_id_len > 0);
+
+ strncpy(conn_id, conn_id_start, conn_id_len);
+ conn_id[conn_id_len] = '\0';
+ return 0;
}
/* Check response, automatically patch connection ID if needed */
--
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Gerrit-Project: osmo-mgw
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ib9b13d7b0e64f8ae25a7b69cbb385e7fad33d02b
Gerrit-Change-Number: 10679
Gerrit-PatchSet: 1
Gerrit-Owner: Neels Hofmeyr <nhofm...@sysmocom.de>
