> On Jun 27, 2025, at 22:03, Marvin Scholz <epirat07-at-gmail....@ffmpeg.org>
> wrote:
>
> On 13 Jun 2025, at 10:56, Jack Lau via ffmpeg-devel wrote:
>
>> mark this ignore_ipv6 flag could ignore any ipv6 ICE candidate,
>> preventing “No route to host” errors on devices without IPv6 connectivity.
>>
>> Signed-off-by: Jack Lau <jacklau1...@qq.com>
>> ---
>> libavformat/whip.c | 13 +++++++++++++
>> 1 file changed, 13 insertions(+)
>>
>> diff --git a/libavformat/whip.c b/libavformat/whip.c
>> index a6827d3478..84c2092e5e 100644
>> --- a/libavformat/whip.c
>> +++ b/libavformat/whip.c
>> @@ -193,9 +193,14 @@ enum WHIPState {
>> WHIP_STATE_FAILED,
>> };
>>
>> +typedef enum WHIPFlags {
>> + WHIP_FLAG_IGNORE_IPV6 = (1 << 0) // Ignore ipv6 candidate
>> +} WHIPFlags;
>> +
>> typedef struct WHIPContext {
>> AVClass *av_class;
>>
>> + uint32_t flags; // enum WHIPFlags
>> /* The state of the RTC connection. */
>> enum WHIPState state;
>> /* The callback return value for DTLS. */
>> @@ -871,6 +876,7 @@ static int parse_answer(AVFormatContext *s)
>> if (ptr && av_stristr(ptr, "host")) {
>> char protocol[17], host[129];
>> int priority, port;
>> + struct in6_addr addr6;
>> ret = sscanf(ptr, "%16s %d %128s %d typ host", protocol,
>> &priority, host, &port);
>> if (ret != 4) {
>> av_log(whip, AV_LOG_ERROR, "WHIP: Failed %d to parse
>> line %d %s from %s\n",
>> @@ -879,6 +885,11 @@ static int parse_answer(AVFormatContext *s)
>> goto end;
>> }
>>
>> + if (whip->flags & WHIP_FLAG_IGNORE_IPV6 &&
>> inet_pton(AF_INET6, host, &addr6) == 1) {
>> + av_log(whip, AV_LOG_DEBUG, "WHIP: Ignore ipv6 %s, line
>> %d %s \n", host, i, line);
>
> Nit: "Ignoring IPv6"
> Also why the WHIP prefix? Your log context would already add the whip demux
> name to the message, no?
>
>> + continue;
>> + }
>> +
>> if (av_strcasecmp(protocol, "udp")) {
>> av_log(whip, AV_LOG_ERROR, "WHIP: Protocol %s is not
>> supported by RTC, choose udp, line %d %s of %s\n",
>> protocol, i, line, whip->sdp_answer);
>> @@ -1892,6 +1903,8 @@ static const AVOption options[] = {
>> { "authorization", "The optional Bearer token for WHIP
>> Authorization", OFFSET(authorization), AV_OPT_TYPE_STRING, {
>> .str = NULL }, 0, 0, ENC },
>> { "cert_file", "The optional certificate file path for DTLS",
>> OFFSET(cert_file), AV_OPT_TYPE_STRING, { .str = NULL },
>> 0, 0, ENC },
>> { "key_file", "The optional private key file path for DTLS",
>> OFFSET(key_file), AV_OPT_TYPE_STRING, { .str = NULL },
>> 0, 0, ENC },
>> + { "whip_flags", "Set flags affecting WHIP connection behavior",
>> OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 },
>> 0, UINT_MAX, ENC, .unit = "flags" },
>> + { "ignore_ipv6", "The optional ignore any IPv6 ICE candidate",
>> 0, AV_OPT_TYPE_CONST, { .i64 = WHIP_FLAG_IGNORE_IPV6 }, 0, UINT_MAX, ENC,
>> .unit = "flags" },
>
> Nit: The description grammar is a bit confusing, maybe just: "Ignore any IPv6
> ICE candidates".
I totally agree with your ideas, I’ve already send the v4 patchset
https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=14867
Thanks for your reviews!
Jack
>
>> { NULL },
>> };
>
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