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net: fix bad copy in ICMP ECHO

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This commit is contained in:
K. Lange 2021-06-18 21:41:17 +09:00
parent b380714969
commit d5358b7e97
1 changed files with 1 additions and 1 deletions
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2
kernel/net/ipv4.c
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@ -141,6 +141,7 @@ static void icmp_handle(struct ipv4_packet * packet, const char * src, const cha
if (ntohs(packet->length) & 1) packet->length++;
struct ipv4_packet * response = malloc(ntohs(packet->length));
memcpy(response, packet, ntohs(packet->length));
response->length = packet->length;
response->destination = packet->source;
response->source = ((struct EthernetDevice*)nic->device)->ipv4_addr;
@ -152,7 +153,6 @@ static void icmp_handle(struct ipv4_packet * packet, const char * src, const cha
response->dscp_ecn = 0;
response->checksum = 0;
response->checksum = htons(calculate_ipv4_checksum(response));
memcpy(response->payload, packet->payload, ntohs(packet->length));
struct icmp_header * ping_reply = (void*)&response->payload;
ping_reply->csum = 0;