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smtp.c: Fix detecting overlength server names

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Thanks to Axel Lin
This commit is contained in:
Dirk Ziegelmeier 2017-06-14 22:06:37 +02:00
parent 67d1970059
commit 5a27e97baf
1 changed files with 3 additions and 1 deletions
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4
src/apps/smtp/smtp.c
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@ -346,7 +346,9 @@ smtp_set_server_addr(const char* server)
{ {
size_t len = 0; size_t len = 0;
if (server != NULL) { if (server != NULL) {
len = strnlen(server, SMTP_MAX_SERVERNAME_LEN); /* strnlen: length WITHOUT terminating 0 byte */ /* strnlen: returns length WITHOUT terminating 0 byte OR
* SMTP_MAX_SERVERNAME_LEN+1 when string is too long */
len = strnlen(server, SMTP_MAX_SERVERNAME_LEN+1);
} }
if (len > SMTP_MAX_SERVERNAME_LEN) { if (len > SMTP_MAX_SERVERNAME_LEN) {
return ERR_MEM; return ERR_MEM;