res_pjsip_outbound_registration.c: Add User-Agent header override
This introduces a setting for outbound registrations to override the global User-Agent header setting. Resolves: #515 UserNote: PJSIP outbound registrations now support a per-registration User-Agent header
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"""add user-agent-header to ps_registrations
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Revision ID: 24c12d8e9014
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Revises: 37a5332640e2
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Create Date: 2024-01-05 14:14:47.510917
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"""
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# revision identifiers, used by Alembic.
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revision = '24c12d8e9014'
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down_revision = '37a5332640e2'
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from alembic import op
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import sqlalchemy as sa
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def upgrade():
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op.add_column('ps_registrations', sa.Column('user_agent', sa.String(255)))
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def downgrade():
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op.drop_column('ps_registrations', 'user_agent')
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@ -209,6 +209,9 @@
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<configOption name="support_outbound">
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<synopsis>Enables advertising SIP Outbound support (RFC5626) for outbound REGISTER requests.</synopsis>
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</configOption>
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<configOption name="user_agent">
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<synopsis>Overrides the User-Agent header that should be used for outbound REGISTER requests.</synopsis>
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</configOption>
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</configObject>
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</configFile>
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</configInfo>
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@ -341,6 +344,8 @@ struct sip_outbound_registration {
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AST_STRING_FIELD(outbound_proxy);
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/*! \brief Endpoint to use for related incoming calls */
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AST_STRING_FIELD(endpoint);
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/*! \brief User-Agent to use when sending the REGISTER */
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AST_STRING_FIELD(user_agent);
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);
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/*! \brief Requested expiration time */
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unsigned int expiration;
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@ -433,6 +438,8 @@ struct sip_outbound_registration_client_state {
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char *registration_name;
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/*! \brief Expected time of registration lapse/expiration */
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unsigned int registration_expires;
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/*! \brief The value for the User-Agent header sent in requests */
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char *user_agent;
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};
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/*! \brief Outbound registration state information (persists for lifetime that registration should exist) */
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@ -743,6 +750,27 @@ static pj_status_t registration_client_send(struct sip_outbound_registration_cli
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/* Add Security-Verify or Security-Client headers */
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add_security_headers(client_state, tdata);
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/*
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* Replace the User-Agent header if a different one should be used
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*/
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if (!ast_strlen_zero(client_state->user_agent)) {
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static const pj_str_t user_agent_str = { "User-Agent", 10 };
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pjsip_generic_string_hdr *default_user_agent_hdr;
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pjsip_generic_string_hdr *user_agent_hdr;
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pj_str_t user_agent_val;
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default_user_agent_hdr = pjsip_msg_find_hdr_by_name(tdata->msg, &user_agent_str, NULL);
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user_agent_val = pj_str(client_state->user_agent);
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user_agent_hdr = pjsip_generic_string_hdr_create(tdata->pool, &user_agent_str, &user_agent_val);
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if (!user_agent_hdr) {
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ast_log(LOG_ERROR, "Could not add custom User-Agent to outbound registration %s, sending REGISTER request with non-custom header\n", client_state->registration_name);
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} else {
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if (default_user_agent_hdr) {
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pj_list_erase(default_user_agent_hdr);
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}
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pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *)user_agent_hdr);
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}
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}
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/*
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* Set the transport in case transports were reloaded.
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* When pjproject removes the extraneous error messages produced,
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@ -1520,6 +1548,7 @@ static void sip_outbound_registration_client_state_destroy(void *obj)
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ast_taskprocessor_unreference(client_state->serializer);
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ast_free(client_state->transport_name);
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ast_free(client_state->registration_name);
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ast_free(client_state->user_agent);
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if (client_state->last_tdata) {
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pjsip_tx_data_dec_ref(client_state->last_tdata);
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}
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@ -1548,6 +1577,7 @@ static struct sip_outbound_registration_state *sip_outbound_registration_state_a
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state->client_state->transport_name = ast_strdup(registration->transport);
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state->client_state->registration_name =
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ast_strdup(ast_sorcery_object_get_id(registration));
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state->client_state->user_agent = ast_strdup(registration->user_agent);
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ast_statsd_log_string("PJSIP.registrations.count", AST_STATSD_GAUGE, "+1", 1.0);
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ast_statsd_log_string_va("PJSIP.registrations.state.%s", AST_STATSD_GAUGE, "+1", 1.0,
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@ -2805,6 +2835,7 @@ static int load_module(void)
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ast_sorcery_object_field_register_custom(ast_sip_get_sorcery(), "registration", "security_mechanisms", "", security_mechanisms_handler, security_mechanism_to_str, NULL, 0, 0);
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ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "line", "no", OPT_BOOL_T, 1, FLDSET(struct sip_outbound_registration, line));
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ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "endpoint", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct sip_outbound_registration, endpoint));
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ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "user_agent", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct sip_outbound_registration, user_agent));
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/*
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* Register sorcery observers.
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