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Merge branch 'bugfix/udp_multicast_example_errors' into 'master'

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udp_multicast_example: better handling wrong addresses

Closes IDFGH-979

See merge request idf/esp-idf!4784
This commit is contained in:
Angus Gratton 2019-04-29 09:21:07 +08:00
commit eb3791faba
1 changed files with 6 additions and 0 deletions
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6
examples/protocols/sockets/udp_multicast/main/udp_multicast_example_main.c
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@ -74,6 +74,8 @@ static int socket_add_ipv4_multicast_group(int sock, bool assign_source_if)
err = inet_aton(MULTICAST_IPV4_ADDR, &imreq.imr_multiaddr.s_addr);
if (err != 1) {
ESP_LOGE(V4TAG, "Configured IPV4 multicast address '%s' is invalid.", MULTICAST_IPV4_ADDR);
// Errors in the return value have to be negative
err = -1;
goto err;
}
ESP_LOGI(TAG, "Configured IPV4 Multicast address %s", inet_ntoa(imreq.imr_multiaddr.s_addr));
@ -426,6 +428,10 @@ static void mcast_example_task(void *pvParameters)
ESP_LOGE(TAG, "getaddrinfo() failed for IPV4 destination address. error: %d", err);
break;
}
if (res == 0) {
ESP_LOGE(TAG, "getaddrinfo() did not return any addresses");
break;
}
#ifdef CONFIG_EXAMPLE_IPV4_ONLY
((struct sockaddr_in *)res->ai_addr)->sin_port = htons(UDP_PORT);
inet_ntoa_r(((struct sockaddr_in *)res->ai_addr)->sin_addr, addrbuf, sizeof(addrbuf)-1);