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res_pjsip_outbound_registration.c: Add User-Agent header override

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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
This commit is contained in:
Flole998
2023-12-13 14:28:15 +00:00
committed by asterisk-org-access-app[bot]
parent edf54951be
commit 775352ee6c
2 changed files with 53 additions and 0 deletions
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22
contrib/ast-db-manage/config/versions/24c12d8e9014_add_user_agent_header_to_ps_.py Normal file
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@@ -0,0 +1,22 @@
"""add user-agent-header to ps_registrations
Revision ID: 24c12d8e9014
Revises: 37a5332640e2
Create Date: 2024-01-05 14:14:47.510917
"""
# revision identifiers, used by Alembic.
revision = '24c12d8e9014'
down_revision = '37a5332640e2'
from alembic import op
import sqlalchemy as sa
def upgrade():
op.add_column('ps_registrations', sa.Column('user_agent', sa.String(255)))
def downgrade():
op.drop_column('ps_registrations', 'user_agent')

31
res/res_pjsip_outbound_registration.c
View File

@@ -209,6 +209,9 @@
<configOption name="support_outbound">
<synopsis>Enables advertising SIP Outbound support (RFC5626) for outbound REGISTER requests.</synopsis>
</configOption>
<configOption name="user_agent">
<synopsis>Overrides the User-Agent header that should be used for outbound REGISTER requests.</synopsis>
</configOption>
</configObject>
</configFile>
</configInfo>
@@ -341,6 +344,8 @@ struct sip_outbound_registration {
AST_STRING_FIELD(outbound_proxy);
/*! \brief Endpoint to use for related incoming calls */
AST_STRING_FIELD(endpoint);
/*! \brief User-Agent to use when sending the REGISTER */
AST_STRING_FIELD(user_agent);
);
/*! \brief Requested expiration time */
unsigned int expiration;
@@ -433,6 +438,8 @@ struct sip_outbound_registration_client_state {
char *registration_name;
/*! \brief Expected time of registration lapse/expiration */
unsigned int registration_expires;
/*! \brief The value for the User-Agent header sent in requests */
char *user_agent;
};
/*! \brief Outbound registration state information (persists for lifetime that registration should exist) */
@@ -743,6 +750,27 @@ static pj_status_t registration_client_send(struct sip_outbound_registration_cli
/* Add Security-Verify or Security-Client headers */
add_security_headers(client_state, tdata);
/*
* Replace the User-Agent header if a different one should be used
*/
if (!ast_strlen_zero(client_state->user_agent)) {
static const pj_str_t user_agent_str = { "User-Agent", 10 };
pjsip_generic_string_hdr *default_user_agent_hdr;
pjsip_generic_string_hdr *user_agent_hdr;
pj_str_t user_agent_val;
default_user_agent_hdr = pjsip_msg_find_hdr_by_name(tdata->msg, &user_agent_str, NULL);
user_agent_val = pj_str(client_state->user_agent);
user_agent_hdr = pjsip_generic_string_hdr_create(tdata->pool, &user_agent_str, &user_agent_val);
if (!user_agent_hdr) {
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);
} else {
if (default_user_agent_hdr) {
pj_list_erase(default_user_agent_hdr);
}
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *)user_agent_hdr);
}
}
/*
* Set the transport in case transports were reloaded.
* When pjproject removes the extraneous error messages produced,
@@ -1520,6 +1548,7 @@ static void sip_outbound_registration_client_state_destroy(void *obj)
ast_taskprocessor_unreference(client_state->serializer);
ast_free(client_state->transport_name);
ast_free(client_state->registration_name);
ast_free(client_state->user_agent);
if (client_state->last_tdata) {
pjsip_tx_data_dec_ref(client_state->last_tdata);
}
@@ -1548,6 +1577,7 @@ static struct sip_outbound_registration_state *sip_outbound_registration_state_a
state->client_state->transport_name = ast_strdup(registration->transport);
state->client_state->registration_name =
ast_strdup(ast_sorcery_object_get_id(registration));
state->client_state->user_agent = ast_strdup(registration->user_agent);
ast_statsd_log_string("PJSIP.registrations.count", AST_STATSD_GAUGE, "+1", 1.0);
ast_statsd_log_string_va("PJSIP.registrations.state.%s", AST_STATSD_GAUGE, "+1", 1.0,
@@ -2805,6 +2835,7 @@ static int load_module(void)
ast_sorcery_object_field_register_custom(ast_sip_get_sorcery(), "registration", "security_mechanisms", "", security_mechanisms_handler, security_mechanism_to_str, NULL, 0, 0);
ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "line", "no", OPT_BOOL_T, 1, FLDSET(struct sip_outbound_registration, line));
ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "endpoint", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct sip_outbound_registration, endpoint));
ast_sorcery_object_field_register(ast_sip_get_sorcery(), "registration", "user_agent", "", OPT_STRINGFIELD_T, 0, STRFLDSET(struct sip_outbound_registration, user_agent));
/*
* Register sorcery observers.