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lwip_getaddrinfo: check max name length

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sg 2015-09-04 21:12:39 +02:00
parent 6795590603
commit 1fbbf0e837
1 changed files with 4 additions and 0 deletions
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4
src/api/netdb.c
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@ -349,6 +349,10 @@ lwip_getaddrinfo(const char *nodename, const char *servname,
total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_in); total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_in);
if (nodename != NULL) { if (nodename != NULL) {
namelen = strlen(nodename); namelen = strlen(nodename);
if (namelen > DNS_MAX_NAME_LENGTH) {
/* invalid name length */
return EAI_FAIL;
}
LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1); LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
total_size += namelen + 1; total_size += namelen + 1;
} }