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bugfix: fix ICMP specify length issue

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This commit is contained in:
ronghulin 2020-06-23 16:30:28 +08:00
parent 7c5a5617a8
commit 9230e0d26d
2 changed files with 4 additions and 3 deletions
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5
components/lwip/apps/ping/ping_sock.c
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@ -103,10 +103,10 @@ static int esp_ping_receive(esp_ping_t *ep)
int len = 0;
struct sockaddr_storage from;
int fromlen = sizeof(from);
uint16_t data_head = (uint16_t)(sizeof(struct ip_hdr) + sizeof(struct icmp_echo_hdr));
while ((len = recvfrom(ep->sock, buf, sizeof(buf), 0, (struct sockaddr *)&from, (socklen_t *)&fromlen)) > 0) {
if (len >= (int)(sizeof(struct ip_hdr) + sizeof(struct icmp_echo_hdr))) {
ep->recv_len = (uint32_t)len;
if (len >= data_head) {
if (from.ss_family == AF_INET) {
// IPv4
struct sockaddr_in *from4 = (struct sockaddr_in *)&from;
@ -126,6 +126,7 @@ static int esp_ping_receive(esp_ping_t *ep)
if ((iecho->id == ep->packet_hdr->id) && (iecho->seqno == ep->packet_hdr->seqno)) {
ep->received++;
ep->ttl = iphdr->_ttl;
ep->recv_len = lwip_ntohs(IPH_LEN(iphdr)) - data_head; // The data portion of ICMP
return len;
}
}

2
components/lwip/include/apps/ping/ping_sock.h
View file

@ -82,7 +82,7 @@ typedef struct {
.count = 5, \
.interval_ms = 1000, \
.timeout_ms = 1000, \
.data_size = 56, \
.data_size = 64, \
.tos = 0, \
.target_addr = ip_addr_any_type, \
.task_stack_size = 2048, \