Module: kamailio Branch: 6.0 Commit: 46702d80d76f6b70b63d2fca4e884def18b20385 URL: https://github.com/kamailio/kamailio/commit/46702d80d76f6b70b63d2fca4e884def...

Author: Henning Westerholt hw@gilawa.com Committer: Xenofon Karamanos 22965395+xkaraman@users.noreply.github.com Date: 2025-06-26T10:53:00Z

rtpengine: improve randomness of cookie by using PNRG and random sequence numbers

(cherry picked from commit 33b80fcc4d84f955b29bd65bccee9ef2a62e7000)

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Modified: src/modules/rtpengine/rtpengine.c

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Diff: https://github.com/kamailio/kamailio/commit/46702d80d76f6b70b63d2fca4e884def... Patch: https://github.com/kamailio/kamailio/commit/46702d80d76f6b70b63d2fca4e884def...

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diff --git a/src/modules/rtpengine/rtpengine.c b/src/modules/rtpengine/rtpengine.c index 36f93dd35aa..7b66161c834 100644 --- a/src/modules/rtpengine/rtpengine.c +++ b/src/modules/rtpengine/rtpengine.c @@ -83,6 +83,7 @@ #include "../../core/char_msg_val.h" #include "../../core/utils/srjson.h" #include "../../core/cfg/cfg_struct.h" +#include "../../core/rand/fastrand.h" #include "../../modules/tm/tm_load.h" #include "../../modules/crypto/api.h" #include "../../modules/lwsc/api.h" @@ -307,7 +308,7 @@ static void parse_call_stats(bencode_item_t *, struct sip_msg *); static int control_cmd_tos = -1; static int rtpengine_allow_op = 0; static struct rtpp_node **queried_nodes_ptr = NULL; -static pid_t mypid; + static unsigned int myseqn = 0; static str extra_id_pv_param = {NULL, 0}; static char *setid_avp_param = NULL; @@ -2701,6 +2702,8 @@ static int mos_label_stats_parse(struct minmax_mos_label_stats *mmls)

static int child_init(int rank) { + pid_t mypid = 0; + if(!rtpp_set_list) return 0;

@@ -2711,7 +2714,7 @@ static int child_init(int rank)

if(rank == PROC_MAIN) { if(rtpengine_dtmf_event_sock.len > 0) { - LM_DBG("Register RTPENGINE DTMF WORKER %d\n", mypid); + LM_DBG("Register RTPENGINE DTMF WORKER %d\n", getpid()); /* fork worker process */ mypid = fork_process(PROC_RPC, "RTPENGINE DTMF WORKER", 1); if(mypid < 0) { @@ -2733,7 +2736,9 @@ static int child_init(int rank) return 0; }

- mypid = getpid(); + /* random start value for for cookie sequence number */ + myseqn = fastrand(); + LM_ERR("myseqn %u\n", myseqn);

// vector of pointers to queried nodes queried_nodes_ptr = (struct rtpp_node **)pkg_malloc( @@ -2844,7 +2849,7 @@ static char *gencookie(void) { static char cook[34];

- snprintf(cook, 34, "%d_%d_%u ", server_id, (int)mypid, myseqn); + snprintf(cook, 34, "%d_%u_%u ", server_id, fastrand(), myseqn); myseqn++; return cook; }